Spyridon Stavros Marinopoulos, M.B.A., M.D.

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They should be told that these factors are not the cause of the disease medicine rheumatoid arthritis buy discount phenytoin 100 mg, although they can provoke symptoms from an irritable mucous membrane symptoms 8 days before period phenytoin 100 mg. There is hyperplasia of the maxillary mucous membrane and the ethmoidal cells are filled with polypoid mucous membrane medications beta blockers cheap phenytoin 100 mg on line. This pathology may not necessarily result in symptoms medicine keri hilson lyrics best purchase phenytoin, but it can cause a feeling of congestion and may also increase the tendency to bacterial infection symptoms jaw pain and headache 100 mg phenytoin purchase with mastercard, especially following a common cold. It is indicated when there is a suspicion of malignancy or meningocoele, and also in all cases before endoscopic surgery. These three disease manifestations usually start within months or a few years in 40- to 50-year-old patients. Asthma patients have polyps which are sensitive to corticosteroid treatment, but they usually require continuous intranasal therapy and surgery as well. As a rule, the asthma is chronic, severe and persistent, requiring continuous inhaled corticosteroid treatment. Questioning about adverse reactions to acetylsalicylic acid is obligatory in patients with nasal polyps. It starts with a low dosage (10 mg) and it must be performed by a specialist in a hospital setting. Other examinations Any child with nasal polyps needs an evaluation for cystic fibrosis. In general, allergy testing is not indicated but it is often expected by the patient. Nasal bleeding, pain and unilateral polyps should alert the physician to other conditions, such as malignant tumours, inverted papillomata and, in a child, meningocoeles, all of which may masquerade as simple polyps. For that reason, microscopy is always necessary when polyps are removed for the first time, and when polyps are unilateral. Endoscopic appearance No polyps Restricted to middle meatus Below middle turbinate Massive polyposis Reprinted from Ref. In contrast to a hyperplastic turbinate, a polyp can be made to move by touching with a probe. Endoscopy with a rigid scope is the preferred examination, as it can diagnose small polyps in the middle meatus and give a superior assessment of the extent of the disease and of anatomical abnormalities. The examination is performed after simple spraying of the nose with a local anaesthetic and a vasoconstrictor. Endoscopy is useful, not only for the diagnosis, but also for follow-up examination after Table 121. Right Maxillary Anterior ethmoid Posteriod ethmoid Sphenoid Frontal Ostiomeatal complex Total 0­2 0­2 0­2 0­2 0­2 0/2 0­12 Left 0­2 0­2 0­2 0­2 0­2 0/2 0­12 0, no opacity; 1, some opacity; 2, total opacity. The aetiology is unknown and treatment consists of surgical removal, which cures the disease. Possibly, leukotriene antagonists may have an additional effect in selected patients. Score 2 Intranasal corticosteroids Intranasal corticosteroids are by far the best documented type of treatment for nasal polyposis. This may be due to inadequate intranasal distribution of the spray in a very blocked nose. Pressure from polyps may have changed the normal slitlike cavity to a wide tube in the lower part of the nose, at the same time as there may be considerable pathology and blockage in the upper part of the nose. Clinical experience indicates that the effect of topical steroids, in contrast to systemic administration, is poor. The total glucocorticoid dose in a depot-injection corresponds to about 100 mg prednisolone. Clinical experience confirms that the beneficial effect, in many cases, will outlast the medication for a variable period. In severe disease, requiring endoscopic surgery, preoperative use of a systemic steroid will considerably facilitate surgery. Only a single, two- to three-week course of systemic steroids has been given in the few published studies. However, it seems likely that some patients with severe recurrent polyposis may benefit from repeated use of short-term systemic steroids. Adverse effects from this therapy cannot be expected to be severe and may be outweighed by increased quality of life in patients with severe disease and abolished olfaction. However, in some mild cases presenting for the first time with large polyps, polypectomy can have a long-lasting effect. In more severe cases with persistent symptoms, surgery is added to medical treatment in order to reduce the amount of inflammatory tissue, open up the nasal airway and improve ventilation of the paranasal sinuses. Following intranasal corticosteroid treatment for one month and orally for ten days, patients had a unilateral endoscopic surgery performed. Comparison of the two sides post-operatively showed that surgery had an additional effect on nasal blockage and on polyp score, but not on the sense of smell. Twenty-five percent of the patients were willing to undergo a further operation on the unoperated side at the end of the study. The authors concluded that medical treatment is sufficient to treat most cases of nasal polyposis. If nasal obstruction remains a main problem after medical treatment then surgical treatment is indicated. Whether a more conservative or more radical approach offers the better longterm results remains to be determined. Systemic steroids for two to three weeks have an effect on all types of symptoms and pathology, including the sense of smell. Simple polypectomy is still performed, but in the more severe and persistent cases, endoscopic surgery is recommended. Nasal polyps are suspected in patient with perennial rhinitis, persistent nasal blockage and reduced sense of smell. Unilateral nasal polyps should always be regarded with suspicion and histology is needed in order to exclude malignancy. In contrast to common belief, IgE-mediated allergy does not seem to play an aetiological role. The factors determining the localization of the disease to a few square centimetres of the airways are not known. Polyps are oedematous sacks covered by a normal airway epithelium and containing very few nerves, blood vessels and glands which have undergone cystic degeneration. Polyps contain degranulated mast cells and they have a very high concentration of histamine. Preceded by some years with rhinitis symptoms, nasal blockage becomes severe and persistent and, typically, the sense of smell is seriously impaired, when polyps develop. Intranasal corticosteroids reduce rhinitis symptoms, improve nasal breathing, reduce the size of polyps and prevent, in part, their recurrence, but it has little effect on the sense of smell. Intranasal steroids can, as basic long-term therapy, be used alone in mild cases, Best clinical practice [Primary treatment consists of intranasal corticosteroids in the majority of cases. Deficiencies in current knowledge and areas for future research $ $ Nasal polyposis resembles an autoimmune disease and this possibility needs further examination. The suggestion that environmental fungi may be an initiating factor needs further investigation. It is worth studying whether intranasal corticosteroids can be given in a more efficient way. The effect of systemic corticosteroid treatment needs to be investigated in placebo-controlled, dose­response studies. The possibility that a long-term treatment with a low dose of systemic corticosteroid in selected patients has a beneficial effect which outweighs the risk of side effects needs a thorough investigation. It is necessary in long-term controlled studies to analyse what is the optimal combined medical and surgical management. Radenne F, Lamblin C, Vandezande L-M, Tillie-Leblond I, Darras J, Tonnel A-B et al. Polypoidal rhinosinuitis in cystic fibrosis: a clinical and histopathological study. En block removal of the ethmoid and ostiomeatal complex in cadavers, with a practical application. The effect of budesonide (Rhinocort) in the treatment of small and medium sized nasal polyps. Efficacy of topical corticosteroid powder for nasal polyps: A double-blind, placebo-controlled study of budesonide. Efficacy of an aqueous and a powder formulation of nasal budesonide compared in patients with nasal polyps. A randomized controlled trial showing efficacy of once daily intranasal budesonide in nasal polyposis. Efficacy and tolerability of budesonide aqueous nasal spray treatment in patients with nasal polyps. A double-blind comparison of intranasal budesonide with placebo for nasal polyposis. Acoustic rhinometry used as a method to monitor the effect of intramuscular injection of steroid in the treatment of nasal polyps. Functional endoscopic sinus surgery: 5 year follow up and results of a prospective, randomised, stratified, double-blind, placebo controlled study of postoperative fluticasone propionate aqueous nasal spray. A randomized controlled study evaluating ¨] 1559 medical treatment versus surgical treatment in addition to medical treatment of nasal polyposis. Health-related quality of life after polypectomy with and without additional surgery. However, not all patients with rhinitis present with asthma and there are some differences between rhinitis and asthma. However, it has been shown that perennial rhinitis is a factor independent of allergy in the risk for asthma. Rhinitis usually happens in over 65 percent of patients with allergic asthma and in over 80 percent of patients with nonallergic asthma (for review, see Ref. However, in many instances, symptoms predominate in one organ and may be hidden in the other although they exist. The Copenhagen Allergy Study3 investigated the frequency of asthma and rhinitis related to exposure to pollens, animal dander or mites. Between 42 and 52 percent of patients with rhinitis had asthma and more than 99 percent of subjects with allergic asthma also had allergic rhinitis. The risk of asthma among subjects with allergic rhinitis was calculated to be up to 300 times that among subjects without allergic rhinitis. However, the results observed in developing countries may differ from those in western Chapter 122 the relationship between the upper and lower respiratory tract] 1561 populations. A recent study showed that allergic rhinitis is far less common among asthmatic subjects in rural China than in asthmatic subjects in industrialized countries with a western lifestyle. In an Australian study, it was found that atopy acquired at an early age (before the age of six years) is an important predictive factor for asthma continuing into late childhood, whereas atopy acquired later was only strongly associated with seasonal allergic rhinitis. In adults, allergic rhinitis as a risk factor for asthma was shown in a 23-year follow-up of college students. Patients with rhinitis with persistent and severe nasal symptoms and a personal history of physician-confirmed sinusitis had an additional increased risk of asthma development. The authors concluded that rhinitis is a significant risk factor for adult-onset asthma in both atopic and nonatopic subjects. Rhinitis and nonspecific bronchial hyperreactivity Many patients with allergic rhinitis have a unique physiologic behaviour separating them from patients with asthma or normal subjects. They have increased bronchial sensitivity to methacholine or histamine,7 especially during and slightly after the pollen season,8 but there are large differences in the magnitude of airway reactivity between asthmatics and rhinitics which are not explained by the allergen type or degree of reactivity. Most inhaled allergens are associated with nasal10 and bronchial symptoms, but in epidemiologic studies differences have been observed. Although there have been some recent concerns, the prevalence of immunoglobulin (Ig)E sensitization to indoor allergens (house dust mites and cat allergens) is positively correlated with both the frequency of asthma and its severity. Alternaria and insect dusts have also been found to be linked to asthma, however, pollen sensitivity has not been found to be associated with asthma in epidemiological studies. All of the most common triggers of occupational asthma can induce occupational rhinitis. Subjects with occupational asthma may often report symptoms of rhinoconjunctivitis. On the other hand, rhinitis more often appears before asthma in the case of high molecular weight agents such as small mammals. Underneath the epithelium, in the submucosa, vessels and mucous glands are present with structural cells (fibroblasts), some inflammatory cells (essentially monocytic cells, lymphocytes and mast cells) and nerves. In the nose, there is a large supply of subepithelial capillary and arterial system and venous cavernous sinusoids. The high degree of vascularization is a key feature of the nasal mucosa and changes in the vasculature may lead to severe nasal obstruction. On the other hand, smooth muscle is present from the trachea to the bronchioles explaining bronchoconstriction in asthma. The recent progress achieved in the cellular and molecular biology of airways diseases has clearly documented that inflammation plays a critical role in the pathogenesis of asthma and rhinitis. The same inflammatory cells appear to be present in the nasal and bronchial mucosa. A growing number of studies show that the inflammation of nasal and bronchial mucosa is sustained by a similar inflammatory infiltrate, which is represented by eosinophils, mast cells, T lymphocytes and cells of the monocytic lineage. Although the nasal and bronchial mucosa are exposed to the same noxious environment (and even more so the nose), epithelial shedding is more pronounced in the bronchi than in the nose of the same patients suffering from asthma and rhinitis. In patients with moderate­severe asthma, eosinophilic inflammation is more pronounced in the bronchi than in the nose,15 whereas in patients with mild asthma inflammation appears to be similar in both sites. Moreover, eosinophilic inflammation of the nose exists in asthmatics with or without nasal symptoms.

Injury to the mucosa of the medial surface of the middle ear may cause adhesions to the tympanic membrane graft during healing medicine 7253 pill purchase genuine phenytoin. In addition symptoms you need a root canal phenytoin 100 mg purchase mastercard, factors that narrow the slender middle ear cleft 2 medications that help control bleeding purchase 100 mg phenytoin amex, such as thickened middle ear mucosa or retraction of the umbo increase this risk medicine vocabulary phenytoin 100 mg buy mastercard. Under any of the preceding circumstances symptoms nervous breakdown order phenytoin with paypal, it is prudent to insert a barrier to prevent contact between the medial and lateral surfaces during healing. Umbo retraction is particularly common in perforations with extensive loss of the inferior part of the tympanic membrane. If the umbo retraction is particularly marked, it may be necessary to disarticulate the ossicular chain to lateralize the manubrium satisfactorily. The malleus head is excised and a malleus to stapes assembly is performed in addition to the tympanic membrane repair. Amputation of the umbo should not be performed as this greatly diminishes acoustic transmission through the middle ear. It should be that this figure is gleaned from case series proffered by motivated individuals with a special interest in otology in children. More typical figures for success rate by British surgeons seems to be between 74 percent (small Chapter 74 Chronic otitis media in childhood] 941 perforation) and 56 percent (large perforation). The surgical repair of the tympanic membrane is a difficult procedure requiring considerable skill. It is debatable whether any surgeon should continue to offer this treatment if his/her success rate for the procedure is as low as 56 percent. Following the loss of this stiff structural element, the thinned area of tympanic membrane can be more easily displaced by the pressure difference across the tympanic membrane. Should the middle ear pressure be raised, as after sleep, the tympanic membrane may bulge laterally. The posterosuperior pars tensa is more vascular than other areas of the tympanic membrane and may be subject to more marked inflammatory reactions. Some cases of tympanic membrane collapse are Chronic otitis media and the pathology of atrophy of the pars tensa of the tympanic membrane Atrophy of the pars tensa of the tympanic membrane occurs through loss of the collagenous fibrous layer. In the presence of an open Eustachian tube, sniffing results in a sharp reduction in Eustachian tube and middle ear pressure. An unwanted consequence of the sharp drop in middle ear pressure is retraction of the tympanic membrane. The benefit resulting from sniffing is closure of the tube and cessation of the unpleasant symptoms. The fundus of the retraction pocket is not wholly visible and there is some accumulation of skin in the retracted area. These have largely followed the original, using an ordinal scale largely based on anatomical features of the retraction pocket. For the most advanced stage of most of these classifications, the definition reflects the role of retraction pockets in the genesis of cholesteatoma by including a nonanatomical feature such as adherence of the pocket or keratin accumulation within the pocket. A recent, innovative classification has also reflected the tendency of retraction pockets to damage the ossicular chain by including an audiometric parameter. Definitions and classification Thus, pars tensa retraction includes not only a range of appearances, but also a clinically important minority which will insidiously deteriorate. Terminology and classifications were specifically designed to attempt to distinguish the high-risk subgroup, which progresses to cholesteatoma. In this ear there is erosion of the manubrium, the incus, the scutum and the posterior annulus as well as the development of a cholesteatoma. The tympanic membrane of this young man is almost entirely atrophic and retracted. The fundus of the retraction pocket is not entirely visible but the pocket remains selfcleaning. The manubrium, the long process of the incus and the stapes superstructure have all been eroded. Although there is air in the protympanum, the atrophic tympanic membrane is draped over the facial nerve and the stapes footplate. The last feature has resulted in elevation of the hearing threshold being restricted to 30 dB hearing loss. This is his better hearing ear and the hospital notes indicate his ear has remained unchanged for over a decade. The age distribution of patients whose retracted tympanic membranes cause sufficient concern to prompt surgery is not necessarily the same as the prevalence of retracted tympanic membranes in the community. This strikingly confirms that intervention for tympanic membrane retraction is predominantly a paediatric problem. Retraction without atrophy (grade I atelectasis) is usually a transitory condition. It rarely progresses to more advanced stages and frequently reverts to a normal tympanic membrane. This behaviour is discernibly different to more advanced stages of this disease (see Table 74. This is significantly different to the behaviour of the other stages of the disease (see Table 74. As a result, the results of the quantitative analysis of the behaviour of retraction towards the promontory has been freely interchanged with that of retraction towards the attic. Although the Sade grade remains the most widely accepted adopted means of monitoring disease progression, the risk of deterioration from one grade to the next is low and the classification provides a low predictive value for disease progression. These result not just from the atrophy of the tympanic membrane itself, but also from the underlying chronic otitis media, as well as Eustachian tube phenomena. Furthermore, complications of the retraction such as erosion of the ossicles or infection of keratin accumulating within the retraction pocket also contribute to the melange of symptoms. Variable hearing loss due to chronic inflammation with accumulation of a middle ear effusion may occur. Persistent hearing loss may result if the tip of the long process of the incus has been eroded. In general, hearing loss is mild when there is a contact between the retracted tympanic membrane and an intact stapes. Erosion of the stapes superstructure results in a larger and more clinically significant conductive hearing loss. These may be due to episodes of acute otitis media or infection of debris within the pocket. They find that sniffing, which reduces the middle ear pressure and locks the Eustachian tube, eases this sensation. Care is required to differentiate a retraction pocket from a perforated tympanic membrane and the two-dimensional view provided by a hand-held otoscope may not be sufficient. The otological microscope will help determine if the retracted area is perforated, if other tympanic membrane disease is present and whether there is any evidence for acute or chronic middle ear inflammation. If keratin is accumulating within the retraction pocket, some authorities would consider that the pathology is better considered a cholesteatoma. However, a minor accumulation of dry keratin, associated with streaming of the keratin out of the retraction pocket, usually remains asymptomatic and is not always associated with disease progression. It is important to attempt to identify the margins and entire fundus of the retraction pocket. It may disappear behind the posterior annulus, the manubrium or the chorda tympani. The structures under the floor of the retracted tympanic membrane should be carefully inspected. The promontory and round window and ossicles are readily identifiable when the inferior pars tensa is retracted. If there is retraction of the posterior tympanic membrane, the abnormality is readily recognized because the long process of the incus will be clearly visible. The retraction may be in contact with the long process of the incus only or may envelop the incus and stapes like clingfilm. The lenticular process of the incus may be eroded so that the capitulum is partly visible. The long process may be eroded so that it no longer makes contact with the stapes. There may be erosion of the posterior annulus so that the stapedius tendon and pyramid are clearly visible. An early sign of this accumulation is a stream of wax emanating from the pocket around the posterior annulus and along the posterior canal wall. Keratin accumulation may be focal and associated with areas where the fundus of the pocket is no longer visible. There may be granulation tissue associated with the retraction if this accumulating keratin becomes infected. Surgical elevation of the collapsed tympanic membrane from the ossicles carries some risk of cochlear injury. Failure of the tympanic membrane to heal after surgery may result in an iatrogenic perforation. There is also a risk of spawning an iatrogenic cholesteatoma by leaving epithelium capable of generating keratin in the mesotympanum in those cases with adherence of the tympanic membrane to the walls of the middle ear. Offering surgery which could be considered unnecessary and which carries some risk of morbidity requires some justification. The justification is that allowing the disease to progress to cholesteatoma exposes the patient to the complications of this disease and condemns the affected patient to extensive surgery as the only treatment option. It follows that the debate about intervention pivots on the balance of the risks of surgical intervention at various stages of this progression, as well as the risks associated with the complications of the natural course of the disease. At present, there are no controlled trials of interventions for retraction of the pars tensa. The comparative data required to quantify the above arguments are, therefore, unavailable. Even if such data were already published, the information is unlikely to be generalizable, given the highly operator-dependent nature of the outcome of otological surgery. Since many surgeons performing otological surgery do not keep detailed data about the morbidity associated with their surgery, there is little consensus on the indications for surgical intervention for pars tensa retraction pockets. Pars tensa retraction pockets cause morbidity not just through progression to cholesteatoma, but also by eroding the ossicular chain resulting in hearing loss. Although ignored in the Sade classification, quantitative assessment of hearing status is an important parameter in the complex process of deciding whether to offer intervention for a retraction pocket. To this end, some classifications require hearing evaluation as part of retraction pocket staging. Management of retraction of the pars tensa of the tympanic membrane the management of the variable and uncertain behaviour of retracted tympanic membranes is highly controversial. The data presented above under Natural history of progression of retraction of the tympanic membrane indicate that most cases do not progress. The simpler is to wait until cholesteatoma has developed, at which stage intervention is clearly justifiable. The more controversial is to intervene before cholesteatoma develops, using the best available risk factors. The argument for early intervention asserts that a minor procedure can prevent progression of the disease and the development of complications prior to the development of cholesteatoma. However the best available evidence at present suggests that this treatment does not influence the development of tympanic membrane retraction. If the pocket is adherent to the middle ear walls and tears during removal a second-look procedure may be necessary since the risk of residual disease is as high as with cholesteatoma surgery. The laser vaporizes the epithelium and, in contrast to mechanical techniques, does not require movement to remove disease. The introduction of this procedure has heightened the intensity of the debate concerning the indications for intervention. The results of excision of series of pars tensa retractions are shown in Table 74. Long term results after surgery for retraction pockets As yet there are no published long-term studies using life table methods of the outcome of surgery on pars tensa retraction pockets. As such, surgery for pars tensa retraction might best be viewed as a temporizing procedure, much in the manner of the insertion of grommets for symptomatic persistent glue ear, rather than a definitive cure. By virtue of its simplicity, excision of the retraction pocket can be genuinely offered as prophylaxis Table 74. This child has undergone an Ars-Marquet procedure, in which the tympanic membrane retraction pocket is excised and a minigrommet is inserted through the healthy tympanic membrane remnant. No repair of the defect is undertaken as in the majority of cases the tympanic membrane repairs itself, much as after a traumatic perforation. The data are gleaned predominantly from children operated at Gloucestershire Royal Hospital between 1990 and 1995 (unpublished data). Chapter 74 Chronic otitis media in childhood] 947 Ossicular chain defects associated with retraction pockets the commonest ossicular defect associated with pars tensa tympanic membrane atrophy is erosion of the tip of the long process of the incus. Under some circumstances, squamous epithelium accumulates within the temporal bone. This three-year-old boy presented with hearing loss and in addition to glue ear was noted to have a white mass behind the anterosuperior part of the intact tympanic membrane. He had no previous history of surgical intervention and satisfied the criteria for congenital cholesteatoma. Some epithelial cysts that satisfy the definition of a congenital cholesteatoma do not present until the fourth or fifth decade. It has been suggested that the origins of these may in fact be metaplastic109 or acquired from the aberrant resolution of a pars tensa retraction pocket. Pathogenesis and classification Following the ascendancy of histological examination for pathological diagnosis in the mid-nineteenth century, early theories that cholesteatoma was a tumour were superseded by hypotheses that the condition was due either to a vestigial structure or a metaplastic process. This distinction between congenital and acquired forms of cholesteatoma remains important to this day, particularly in children. Congenital cholesteatoma Keratin cysts may accumulate because the epithelium from which they arise is closed.

Even if such a tubular configuration is present treatment 1 degree burn purchase phenytoin on line, this is not an independent bony tubular structure but simply the space which other independent bony structures leave between them medications during breastfeeding phenytoin 100 mg purchase fast delivery. The anatomic situation can be further complicated in that the most anterior ethmoidal cells may develop from the frontal recess symptoms 9 days post ovulation discount phenytoin 100 mg buy on line. From here symptoms of colon cancer order phenytoin 100 mg on line, cells not uncommonly develop into the frontal bone medicine mountain scout ranch buy 100 mg phenytoin free shipping, alongside the frontal sinus proper. These cells have been called bulla frontalis this variation may range from a bare suggestion of a bulge of the frontal recess into the floor of the frontal sinus to the formation of two or more approximately equally large cells on one side of the frontal bone. As all of these cells open into the frontal recess, it may become impossible in some cases to determine which of those cells is the true frontal sinus and which a bulla frontalis. Posteriorly, the bulla may fuse with the basal lamella of the middle turbinate and superiorly it may reach the roof of the ethmoids forming the posterior wall of the frontal recess. Sometimes a cleft is encountered between the posterior wall of the bulla and the basal lamella of the middle turbinate, the retrobullar recess. The space between it and the ethmoidal roof is called the suprabullar recess, which may connect anteriorly with the frontal recess if the bulla does not reach the skull base. Suprabullar and retrobullar recess may be continguous or may be separated by complete or incomplete bony septations. Contiguous, supra- and retrobullar recess may be defined as follows: medial: middle turbinate; lateral: lamina papyracea; superior: roof of ethmoid; inferior and anterior: unicate process; posterior: basal lamella of the middle turbinate. The bony cover for these open clefts and cells of the ethmoid is provided by the frontal bone, which covers these open spaces with its foveolae ethmoidales (ossis frontalis). In this area, the frontal bone is both thicker and denser than the adjacent bony ethmoidal structures. This difference is greatest medially, in the transition from the thicker bony lamellae of the frontal bone to the much thinner lateral lamella of the cribriform plate. This lateral lamella constitutes the lateral border of the olfactory fossa, with the lamina cribrosa providing its floor. The lateral lamella of the lamina cribrosa is also the medial wall of the dome of the ethmoid, the height and shape of which varies considerably from case to case. It is here too, where the topographic relationships of the anterior ethmoidal artery are especially important. Control (%) Patients (%) 24 21 15 18 15 13 n = 100 Concha bullosa Bent uncinate process Paradoxical middle turbinate Overpneumatized ethmoid bulla Agger nasi cells Haller cells 14 16 17 17 3 2 n = 100 down into the nose again. At the point where the artery enters the anterior cranial fossa through the lateral lamella of the lamina cribrosa, the thinnest bony structures of the entire anterior skull base can be encountered. It is here where the very thin lateral lamella of the lamina cribrosa presents the least resistance to any instrument, with a bony thickness frequently only 10 percent as strong as the roof of the ethmoid. After its origin from the ophthalmic artery in the orbit, the anterior ethmoidal artery passes between superior oblique and medial rectus muscles, through the anterior ethmoidal foramen into the anterior ethmoid complex. It crosses the anterior ethmoid either at the level of the ethmoidal roof or as much as 5 mm below this level, running in a mucous membrane fold or a thin bony mesentery in the roof of the anterior ethmoidal sinuses. The artery may be surrounded by only a thin-walled bony channel, which can be dehiscent in over 40 percent inferiorly. After this occasionally oblique passage through the anterior ethmoid, the artery enters the olfactory fossa, i. After intracranial entry, the artery turns anteriorly forming a groove in the lateral lamella, the socalled ethmoidal sulcus. Here, it gives off anterior meningeal branches and finally reaches the nasal cavity again through the cribroethmoidal foramen and the cribriform plate. It is here where it divides into the anterior nasal artery with superior, lateral and medial nasal branches, as well as a posterior branch. This division may take place before or after its passage through the lamina cribrosa. The anterior ethmoidal artery has been estimated to be unilaterally absent in 14 percent, bilaterally absent in 2 percent and multiple in 30 percent. Those parts of the roof of the ethmoid that are formed by the frontal bone are much thicker and stronger than the lateral wall of the olfactory fossa, which is formed by the lateral lamella of the cribriform plate. In the region of the olfactory fossa, however, the dura is not only thinner, but is firmly attached to the bone, partially where anterior ethmoidal artery and the olfactory filaments pass through the cribriform plate. In the majority of cases, the anterior ethmoidal artery is intradural on its way through the olfactory fossa. All clefts and cells opening posterior to the basal lamella belong to the posterior ethmoid in the superior (and occasionally supreme) meatus. The sphenoid sinus ostium opens into the sphenoethmoidal recess medial to the superior turbinate. The number of cells that make up the posterior ethmoid varies between one and more than five. The topography of the most posterior cell of the posterior ethmoid, however, is of great importance to sinus surgeons, since these cells can develop laterally and even superiorly to the sphenoid sinus. In these cases, the optic nerve and even internal carotid artery may bulge into these sphenoethmoidal cells, named previously after the Chapter 104 Anatomy of the nose and paranasal sinuses] 1337 Austro-Hungarian, Onodi. Areas of squamous metaplasia are often found on the lateral wall, particularly in areas subject to greatest airflow, such as the anterior inferior turbinate. The sphenopalatine artery (from the maxillary artery and thus external carotid artery) contributes the majority of the supply to the turbinates and meatus. It enters through the sphenopalatine foramen which lies just inferior to the horizontal attachment of the middle turbinate and may be damaged in excessive enlargement of a middle meatal antrostomy. In the inferior meatus, the sphenopalatine branch dips below the level of the palate to re-emerge anteriorly, leaving the central portion of the meatus relatively avascular. The internal carotid artery contribution is via the ethmoidal arteries which supply the superior lateral wall. There is considerable overlap between the internal and external carotid arterial systems on each side and between the right and left sides which may complicate attempts at arterial ligation in the management of epistaxis. In addition, numerous arteriovenous anastomoses are found in the deep mucosa and around the glands. There is a small area innervated by the infraorbital nerve anteriorly and an area of overlap between the ethmoidal and maxillary nerves. The anterior superior alveolar nerve sends a small branch to the anterior inferior meatus which may be damaged in inferior meatal surgery affecting dental sensation. Lymphatics drain to the submandibular nodes anteriorly and retropharyngeal nodes posteriorly. It is composed of a body (pneumatized to a variable degree), two wings (greater and lesser) and two inferior plates (lateral and medial pterygoid plates). The jugum on the anterior superior surface of the body articulates with the cribriform plate. This surface bears the chiasmatic sulcus connecting the optic canals, the tuberculum sellae, sella turcica and dorsum sella with related anterior, middle and clinoid processes. The lateral surface of the body is grooved by the carotid sulcus on each side as it traverses the cavernous sinus. The anterior face of the body bears a crest which articulates with the perpendicular plate of the ethmoid. These are large (5­8 mm in diameter) on a macerated skull, but are partially overlapped and closed by the sphenoidal concha and by mucous membrane in life. Pneumatization can extend into the greater wing, pterygoid processes and rostrum and may encroach on the basilar part of the occipital bone. Presellar, in which the sinus is pneumatized as far as the anterior bony wall of the pituitary fossa (11 percent). Sellar, in which pneumatization extends back beneath the pituitary fossa (59 percent). The sinuses are divided by a septum which is often paramedian, and there may be diverticula and incomplete septa. The greater wings contribute to the middle cranial fossa and lateral wall of the orbit. The superior orbital fissure separates it from the lesser wing on each side; the inferior border contributes to the inferior orbital fissure. The foramen rotundum transmits the maxillary nerve, the foramen ovale the mandibular nerve, accessory meningeal artery and sometimes the lesser petrosal nerve, and the middle meningeal artery passes through the foramen spinosum with a meningeal branch of the mandibular nerve. In 40 percent of skulls, an emissary venous sphenoidal foramen is found, related to the foramen ovale. Each pterygoid process consists of a lateral and medial plate which diverge around the pterygoid canal which transmits the pterygoid nerve and artery and which may invaginate the floor of the sphenoid sinus. The lateral pterygoid muscle arises in part from the lateral surface of the lateral pterygoid plate, the medial pterygoid muscle from its medial surface. The medial pterygoid plate ends in a hamulus, around which the tendon of the tensor veli palatine hooks. Although the most posterior ethmoidal cell is closed by the sphenoidal concha, the sphenoid sinus does not simply lie behind. That portion of the sphenoid is usually quite small with the most posterior ethmoid cell often running lateral to the sphenoid sinus and thus the latter may only be entered safely through the most inferior and medial portion of the posterior ethmoid cell. The optic nerve and internal carotid artery produce variable prominences in the lateral and posterior walls of the sinus, with an intervening cleft which can be deep. The bone overlying these structures is extremely thin or dehiscent in a significant proportion of the population (internal carotid artery: 25 percent; optic nerve: 6 percent). The bone is relatively thick in this region, and much thinner in the orbital roofs, where dehiscences may be present. The anterior calvarium increases in thickness from a mean of 4 mm in the newborn to 16 mm in the adult. An intersinus septum is usually present, but may be paramedian and is partially dehiscent in 9 percent. Accessory channels are found in 12 percent of the population and there may be accessory connections to the ethmoidal system. Direct continuity of drainage between the frontal and maxillary sinus may be found depending on the attachment of the uncinate process. The body is usually described as a quadrilateral pyramid, and contains the maxillary sinus. It articulates with eight bones: the opposite maxilla, zygoma, frontal, palatine, ethmoid, lacrimal, inferior concha and nasal bones. The anterior surface bears a number of elevations and depressions, related to the dentition which may be named after the adjacent tooth. The infraorbital foramen is situated above the canine fossa and transmits the infraorbital artery and nerve. The anterior surface is also characterized by the nasal notch and anterior nasal spine. It is indented anteromedially by the lacrimal notch which is related to the lacrimal sac. Inferiorly, the floor of the sinus is generally thicker, but can be encroached upon by the roots of teeth. Venous drainage includes accompanying veins, diploic veins draining into the sagittal and sphenoparietal sinuses and an anastomotic vein in the supraorbital notch connecting the supraorbital and superior ophthalmic vessels. The nerve supply is derived from the supraorbital nerve and the lymphatics drain to the submandibular gland. Chapter 104 Anatomy of the nose and paranasal sinuses] 1341 infrequent, but again more common in the maxillary sinus and concentrated around the ostium. The posterior, infratemporal surface of the bone is convex and grooved by the posterior superior alveolar nerves. Inferiorly, it bears the maxillary tuberosity from which the medial pterygoid muscle takes a small attachment. The medial nasal surface forms the floor of the pyramid and contains a large defect, the maxillary hiatus. This is completed in life by a number of bones and mucous membrane leaving the natural maxillary ostium at the base of the ethmoidal infundibulum. Anterior to the maxillary hiatus is an oblique ethmoidal crest which articulates with the anterior edge of the middle turbinate and agger nasi. The lacrimal canal is created between the maxilla, the lacrimal bone and inferior concha, through which the nasolacrimal duct passes to the anterior part of the inferior meatus. Anterior to the lacrimal notch is the conchal crest to which the inferior concha is attached. Posteriorly, the greater palatine canal is formed between the perpendicular plate of the palatine and maxilla. When the two maxillae are articulated, the alveolar processes form the alveolar arch. The frontal process bears the anterior lacrimal crest, to which the medial palpebral ligament is attached. The palatine process contributes a large portion of the nasal cavity floor and roof of the mouth, articulating with its opposite number in the midline and forming the incisive canal just posterior to the incisors. This transmits the greater palatine arteries and nasopalatine nerves in separate channels to each side of the nose. Posteriorly, the palatine process articulates with the horizontal plate of the palatine bone to complete the hard palate. The maxillary division of the trigeminal nerve supplies sensation via the infraorbital, superior alveolar (anterior, middle and posterior) and greater palatine nerves. Near the midpoint of the infraorbital canal, a small branch, the anterior superior alveolar nerve, arises which passes in its own canal, the canalis sinosus, to the anterior wall of the maxilla. It passes anterior to the inferior turbinate and reaches the nasal septum in front of the incisive foramen.

Nasendoscopy is increasingly used to assess adenoidal status in an outpatient setting medications54583 phenytoin 100 mg sale. Specific questions regarding sleep disturbance treatment yellow jacket sting order phenytoin 100 mg fast delivery, eating and atopic symptoms are important treatments 100 mg phenytoin purchase visa. A full history of medication treatment quadriceps strain discount phenytoin 100 mg overnight delivery, prescribed medications zanaflex discount 100 mg phenytoin overnight delivery, over the counter and alternative or complementary, is important. Clinical examination Assessment of the external nose should be made before rhinoscopy. Description Adenoid tissue filling one-third of the vertical portion of the choanae Adenoid tissue filling from one-third to two-thirds of the choanae From two-thirds to nearly complete obstruction of the choanae Complete choanal obstruction] 1097 Reprinted from Ref. In a randomized controlled trial, the microdebrider was 20 percent faster than the curettage technique,41 but the suction coagulator is significantly cheaper than the microdebrider. Specific investigations for sickle-cell disease, thalassaemia, Down syndrome and congenital heart disease are indicated as appropriate. Management of type 2 diabetes mellitus should follow local paediatric guidelines for diabetic children undergoing elective surgery. Death No data assessing the risk of death following adenoidectomy independent of tonsillectomy or general anaesthesia were found. Traditional adenoidectomy is carried out under general anaesthesia with the child in the tonsillectomy position using the blind technique of curettage. Assessment of the adenoid is made digitally prior to curetting the adenoid from the nasopharynx, and haemostasis achieved with gauze swab tamponade. Techniques employing direct vision have the advantage of reduced blood loss (o4 mL versus 450 mL),36 and the ability to remove adenoid tissue from the choanae, while avoiding trauma to the Eustachian the reactionary haemorrhage rate, that is, bleeding following adenoidectomy, within 6­20 hours of operation is less than 0. A small number of consultants in this questionnaire study (3/285) electively admitted children to an intensive care facility following postnasal packing and 4/285 routinely prescribed antibiotics. The increase in the use of directvision techniques and controlled haemostasis at the time of operation may lead to a fall in the reactionary haemorrhage rate. Traditionally, such children have plain imaging of the cervical spine prior to surgery. Dental trauma Damage to the teeth during adenoidectomy may be accidental due to slippage of the gag or supports. Great care is needed, particularly if the secondary incisors have erupted: the teeth are large, but the mandible immature, and it is safer to use an adult gag, which will rest lateral to the incisors. It is customary to warn parents about damage to teeth, but damage to the teeth will usually be considered negligent. Where there are loose deciduous teeth, consent should be taken preoperatively to remove these under anaesthetic to avoid the possibility of inhalation by the child during the operation or while recovering from anaesthesia. Velopharyngeal dysfunction Severe velopharyngeal incompetence is rare following adenoidectomy, estimated to occur in between 1:1500 and 1:10,000 procedures. It may lead to significant problems with hypernasal speech and swallowing, severe enough to cause nasal regurgitation of fluids. It is mandatory to assess the palate and uvula for submucous cleft of the palate prior to surgery as surgery often unmasks preexisting palatal dysfunction. Using a direct-vision technique, it is possible to perform a partial adenoidectomy, clearing the choanal airway, but leaving the adenoid intact at the velopharyngeal junction. Reconstructive surgery to correct hypernasal speech may be required if speech and swallowing are severely affected. Regrowth of the adenoid A cross-sectional follow-up study of children after adenoidectomy two to five years after surgery concluded that 71 percent had no residual obstructing adenoid. However, the criterion for adenoid sufficient to cause nasal obstruction was tissue occupying more than 40 percent of the nasopharynx. Nasopharyngeal blood clot Blood may pool and clot in the nasopharynx during the procedure. The nasopharynx should be gently suctioned to clear any clot before removing the gag. Rarely, retropharyngeal and mediastinal abscess may occur as a result of trauma and secondary infection of the adenoid bed. Significant obstructive symptoms, short of obstructive sleep apnoea, may have effects on daytime behaviour and cognitive function. Adenoidectomy is effective in the surgical management of children with upper airway obstruction. Adenoidectomy may not be effective in the management of recurrent acute otitis media. Cervical spine Nontraumatic atlantoaxial subluxation (Grisel syndrome) is rare, but associated with overuse of diathermy either for removal of the adenoid or following curettage when used Chapter 84 the adenoid and adenoidectomy] 1099 Best clinical practice [It is no longer appropriate to combine adenoidectomy with tonsillectomy, unless there is a specific indication for adenoidectomy [Grade C] [Adjuvant adenoidectomy may be considered as part of the surgical management of children over the age of three years with otitis media with effusion. Deficiencies in current knowledge and areas for future research For each of the following topics there is no currently available evidence at level 1, and further studies are recommended: Efficacy and morbidity of different techniques of adenoidectomy. Efficacy of adenoidectomy in the management of obstructive sleep apnoea in children. Efficacy of adenoidectomy in the management of chronic and recurrent acute sinusitis in children. The role of the adenoid in facilitating a biofilm infection in the upper respiratory tract. Adenoidectomy versus chemoprophylaxis and placebo for recurrent acute otits media in children. The effect of adenotonsillectomy on serum insulin-like growth factor-I and growth in children with obstructive sleep apnea syndrome. Polysomnographic studies of children undergoing adenoidectomy and/or tonsillectomy. Adenoid tissue rhinopharyngeal obstruction grading based on fibrendoscopic findings: a novel approach to therapeutic management. Size assessment of adenoid and nasopharyngeal airway by acoustic rhinomanometry in children. Organisation of day case adenoidectomy in the management of chronic otitis media with effusion ­ preliminary results. Upper airway obstruction disrupts normal sleeping patterns by causing arousals, presumably induced by the effect of hypoxaemia and hypercarbia on the respiratory centre. Simple snoring Simple snoring is defined as snoring without obstructive apnoeas, frequent arousals or gas exchange abnormalities. It is generally considered benign although there is growing evidence that it may not be as innocuous a condition as has been believed. In addition to evidence that the secretion of growth hormone is reduced in children with simple snoring,3 cohort studies of children with habitual snoring suggest they have a higher incidence of neurocognitive disorders, with demonstrable adverse effects on quality of life. Furthermore, these effects are reversible by adenotonsillectomy, and it may be that we Chapter 85 Obstructive sleep apnoea in childhood] 1103 need to revise our criteria for intervention in this group of children. This can lead to daytime neurobehavioural problems such as an increase in total sleep time, hyperactivity, irritability, bed-wetting and morning headaches. This is a result of craniofacial disproportion and the presence of coexisting upper airway hypotonia. The site of upper airway obstruction is not confined to the adenotonsillar area in these children, and requires investigation. Partial (hypopnoea) or complete upper airway obstruction (apnoea) during sleep can lead to hypoxia and hypercarbia. The degree of hypoxia is influenced by the duration of the apnoeic event, the condition of the cardiopulmonary system and whether a coexisting neuromuscular disorder is present. Hypoxia leads to a rise in sympathetic output causing peripheral vasoconstriction, which results in tachycardia and a rise in blood pressure. Changes in the pulse and blood pressure reflect increased sympathetic activity and are markers of subcortical arousal. They correlate directly with the severity of the sleep-disordered breathing and can be used to quantify it. The pulse transit time is increased in the presence of increased respiratory effort and decreased in the presence of tachycardia associated with arousal. Long-standing sleep apnoea can result in irreversible pulmonary hypertension and if sustained this will lead to right heart failure and cor pulmonale. It can differentiate sleep-disordered breathing from other types of sleep disorder, such as periodic leg movement and narcolepsy. These children develop a cough with most viral upper respiratory tract infections. A history of previous hospital admission with acute airway compromise heralds an increased risk of complications following surgical intervention. Conversely, sleep-disordered breathing in a child can cause failure to thrive or a decrease in growth rate. Children with a triangular chin, steep mandibular angle, retrognathia, narrow high-arched palate and long soft palate are likely to have sleep-disordered breathing. Mouth breathing indicates nasal obstruction, and examination within the nose should look at the structure of the septum and the quality of the nasal lining for the presence of rhinosinusitis. Many children with sleep-disordered breathing are daytime mouth breathers and therefore the presence of chronic mouth breathing should raise the index of clinical suspicion. This can be the result of poor neuromuscular control of the pharyngeal airway, as in cerebral palsy, and previous cleft palate repair. Alternatively, a very large adenoid pad can cause a marked reduction in the calibre of the airway even in the presence of relatively small tonsils. Also, the site of upper airway obstruction is not necessarily adenotonsillar, particularly in syndromic children. Pectus excavatum can result from long-standing intercostal recession during sleep. The presence of noisy breathing, other than stertor, should alert the clinician to the presence of possible distal airway pathology. Severe sleep apnoea with loud, persistent snoring is more likely in younger children. Children with significant obstruction sweat during sleep, particularly in the nuchal area, and have a tracheal tug and intercostal recession with loud stertorous breathing. Children who have repeated apnoeas leading to arousals are very restless at night, often adopting unusual sleeping positions in an attempt to relieve their upper airway obstruction. This is best enquired about by imitating a guttural noise, as parents are often not aware of why the noise is being created. Most parents, if asked directly, will deny that their child stops breathing at night. This can lead to an underestimation of the presence of sleep apnoea if the clinical history is not taken with enough attention to detail. Similarly, pulmonary disease may also exacerbate sleep apnoea by causing increased work in breathing requiring higher intrathoracic pressures. An accurate diagnosis is, therefore, needed to ensure appropriate treatment, avoid unnecessary treatment and identify children at risk of developing complications of treatment. Sleep studies the clinical history and examination will identify most children with sleep-disordered breathing but are not sensitive enough to define severity or differentiate between simple snoring and more severe forms of sleepdisordered breathing. Symptom questionnaires designed to complement the clinical history are good at identifying more severe cases. It relies on indirect measurement of the arterial oxygen saturation using a probe, usually applied to the finger. Between these two extremes it gives little information as to the severity of the sleep apnoea and will miss apnoeic episodes not associated with oxygen desaturation. Computer software measures movement from the movement detector, snoring from the microphone and analyzes the pulse oxymeter output. Increased work of breathing (hypopnoeas) and apnoeic episodes without significant oxygen desaturation can be detected using this form of sleep study. A rise in pulse rate associated with a desaturation signifies an arousal and corresponds to the number of apnoeas and hypopnoeas. This data is more useful in adult sleep medicine as age-appropriate criteria for children are not yet standardized. This is the total number of apnoeas and hypopnoeas divided by the total sleep time, which gives an index per hour (Table 85. It also differentiates between different types of sleep disorder and identifies central apnoeas. Although ideal, full polysomnography is detailed and expensive and cannot be provided for every child suspected of suffering with sleep-disordered breathing. There is, therefore, the need for rationalization of sleep study investigations depending on the clinical needs of the child (Table 85. The reason for this is that the site of upper airway obstruction is not necessarily adenotonsillar and may be anywhere from the palate to the supraglottis. Sleep endoscopy using a flexible fibreoptic endoscope (sleep nasendoscopy) was first described by Croft and Pringle,28 and is routinely used to assess the site of snoring and airway obstruction in adults. In children, sleep nasendoscopy can be performed with the child breathing spontaneously a mixture of halothane and oxygen. This is thought to provide a relaxation of the upper airway musculature that mimics natural sleep. The site or level at which the upper airway obstruction is occurring will define the intervention that is needed to correct it. To classify the site of obstruction the upper aerodigestive tract can be divided into the following four functional levels: 1. The photographs show the endoscopic view of the obstruction at each level from 1 to 4. The incidence of distal airway pathology is higher in Down syndrome patients than in the general population.

Moreover treatment of gout discount 100 mg phenytoin with amex, it is possible to harvest more than one graft through the same incision illness and treatment purchase phenytoin american express. The usual donor site is the right fifth or sixth rib symptoms 7 days after iui buy phenytoin without prescription, with the incision being placed in the anticipated breast crease in girls for cosmetic reasons treatment quotes images discount 100 mg phenytoin amex. The harvested graft should include the perichondrium on the lateral aspect of the graft medicine 81 buy phenytoin 100 mg mastercard, while leaving the inner perichondrial layer intact at the donor site to allow the potential for some cartilage regeneration. Once the graft is harvested, filling the wound with saline and performing a Valsalva manoeuvre will ensure that a breach of the pleura has not occurred. When the graft is carved to the desired shape, the perichondrium should face the lumen of the airway; lateral flanges will prevent prolapse of the graft into the airway. This is usually taken from the upper aspect of the thyroid cartilage on one side, at least 1 mm above true vocal cord level. Thyroid ala has the advantage of being quickly and easily harvested from within the surgical field. However, only a limited amount of grafting material is available, and it is not amenable to being carved with flanges. Auricular cartilage is also useful, in particular for the management of suprastomal collapse as part of a singlestage procedure. It makes an ideal cap or overlay graft, particularly over a stoma site, but is comparatively weak and not appropriate for insertion between the cut edges of the cricoid. In both adults and older children there is no cosmetic donor site deformity, but in children under one year of age it is common to have some residual asymmetry of the ears. Other grafting materials include buccal mucosa, septal cartilage and a pedicled hyoid bone interposition graft. The results utilizing these grafting materials in children have been disappointing. This is a useful graft in older children in whom there is a significant deficit of tracheal cartilage, as after several months the graft will start to ossify, thereby providing support to the airway. Unfortunately, in prepubescent children the graft seems less amenable to ossification, leaving the airway malacic. It may not be required in an anterior flanged graft for moderate subglottic stenosis, however, it is advisable in virtually all other circumstances. In patients in whom graft survival is threatened, such as diabetic patients and patients on continuous steroids, long-term stenting without cartilage grafts is advisable. It is critical that the lower end of this stent does not overlap the tracheotomy site, as this creates the risk of being unable to reinsert a tracheotomy tube during a tracheotomy change. In addition, in some children the cut lower end of the stent is prone to inciting granulation tissue above the stoma site and eventually forms fibrosis and scarring. Suprastomal stents should thus, ideally, be removed within six weeks, as any granulation tissue that has formed during this time will spontaneously resolve. The cut end of this stent is sewn shut and placed in the supraglottis, while its machined smooth end is placed distally to overlap the tracheotomy site slightly. These stents are soft and deformable and do not interfere with placement of the tracheotomy tube. They tend to incite less granulation tissue at the distal end of the stent, and there is less dead space between the distal end of the stent and the tracheotomy tube in which scarring can occur. Unlike the rigid Teflon stents, these soft silastic suprastomal stents may remain in place for longer than six weeks. The proximal end of a suprastomal stent should lie at the level of the false vocal cords. There will be a corresponding restriction of speech, as they permit only limited air passage. Although T-tubes with an outer diameter of 5 mm are commercially available, because of the risk of crusting and obstruction we do not routinely place T-tubes with an outer diameter of less than 8 mm. Following laryngeal reconstruction, the upper end of a T-tube is generally passed through the vocal cords. Aspiration is, therefore, a significant risk and is expected for two weeks following stent placement. A supraglottic swallow technique is readily achieved by most children, minimizing the risk of aspiration. In children in whom a stenting period of less than two weeks is anticipated, an option to be considered is intubation, with the endotracheal tube acting as the stent. For straightforward airway reconstruction, extubation may occur within a few days of the operation or, occasionally, even at the end of the reconstructive procedure. Although the optimal duration of intubation is not clearly defined, there has been a trend towards briefer periods of intubation following laryngotracheal reconstruction. Those with anterior/ posterior cartilage grafts are usually intubated for 7­14 days. The older the child, the more forgiving the airway and the briefer the period of intubation required. It is undesirable for a child to have an unplanned self-extubation, and security of the nasotracheal tube is paramount. Therefore, in younger children, the use of arm restraints and sedation is usually required. Most children younger than age three require sedation, and children who have been previously intubated for long periods may require heavy sedation. Paralysis is undesirable as in the event of accidental decannulation the child is unable to maintain an airway and reintubation must be emergent. Since any child undergoing a single-stage procedure risks the need for reintubation, single-stage procedures should not be performed on children who are difficult to intubate. In the sedated child, commonly encountered problems include lung atelectasis, fluid Chapter 89 Laryngeal stenosis] 1159 overload from heavy sedation, pneumonia and narcotic withdrawal following extubation. In children older than age three with no major cognitive problems, sedation may not be required. Some of these intubated children may be able to ambulate, eat and visit the playroom. A fully awake child does not require ventilatory support and is less likely to have pulmonary complications from the intubation. The day prior to extubation, returning to the theatre to inspect the airway and downsize the tracheotomy tube is advisable. If this is again unsuccessful a decision is required as to whether to proceed to a third trial of extubation or to proceed with tracheotomy. If a tracheotomy is required, the stoma should ideally be placed low in the neck, below the graft site. Glottic oedema and granulation from endotracheal tube irritation are often the cause of failure during a single-stage procedure, rather than the reconstructed site itself. In such cases, the tracheotomy tube may be removed once the oedema has settled, usually within a few weeks. The ideal patient for consideration of a single-stage procedure is one in whom a reasonably simple procedure with a stable larynx is anticipated. This single-stage approach is preferable in children in whom a tracheotomy tube has induced suprastomal collapse. Poor candidates for single-stage reconstruction include children with poor pulmonary function, those who are difficult to intubate, those with recalcitrant airway disease who have failed previous reconstruction, and those with complex disease involving multiple levels of obstruction. Visualization of the supraglottic larynx in cases of supraglottic stenosis and collapse may be misleading. Rigid endoscopic evaluation with the larynx suspended by a laryngoscope may distort the appearance of the larynx, providing false reassurance about the supraglottic airway. Flexible endoscopic evaluation with the patient spontaneously ventilating allows for superior evaluation of the airway dynamics. A larynx that looks extremely compromised in an anaesthetized patient may function quite adequately in the nonanaesthetized state. The most common patterns of supraglottic compromise are arytenoid prolapse and epiglottic petiole prolapse. Arytenoid prolapse is a dynamic instability of the arytenoid, either unilateral or bilateral. It is characterized by its anterior displacement during inspiration, which may cause significant airway obstruction. In laryngotracheal resection, the pathogenesis of arytenoid prolapse may be attributed to either direct damage to the posterior cricoarytenoid ligament or lateral distraction of the posterior plate of the cricoid. Arytenoid prolapse is usually managed endoscopically, using a laser to perform a partial arytenoidectomy. Injudicious use of the laser in the laryngeal inlet predisposes patients to scar formation, fibrosis and narrowing of the supraglottic airway. This, in turn, may induce superimposed supraglottic collapse due to the Bernoulli effect. This problem is most commonly seen in children who have had repeated previous laryngofissure, and is a consequence of damage to the thyroepiglottic ligament, where it inserts into the thyroid cartilage just above the anterior commissure. Injudicious use of a laser in the endolarynx tends to exacerbate the problem, with further scarring narrowing Supraglottic stenosis Supraglottic stenosis is rare, difficult to treat, and is frequently associated with supraglottic collapse. While severe supraglottic stenosis may present with stridor, the primary complaint is more commonly obstructed breathing during sleep. Therefore, a sleep study may be extremely useful in the nontracheotomized patient or in the patient in whom the tracheotomy can be capped, even if for a brief period. The underlying aetiology is often traumatic, due to severe direct airway trauma or airway burns, or is of iatrogenic origin. Suspension of the epiglottic base to the hyoid bone provides some benefit, but is technically challenging and causes the patient significant pain on swallowing for several weeks postoperatively. Our current management of this challenging problem is to perform a complete laryngofissure and reposition the epiglottic petiole back up to the inner surface of the thyroid ala. The laryngofissure is then closed over a T-tube, which is left in position as a translaryngeal stent for at least six months. These patients have significant problems with aspiration for several weeks postoperatively. The upper limit of the keel should not be so high as to disrupt the insertion of the epiglottic petiole. This procedure is normally performed as a twostage procedure, although a single-stage procedure may be performed with the patient intubated and with the endotracheal tube lying on one side of the vertical limb of the keel. In some children there is an associated component of subglottic stenosis, and a decision should be made at this point as to whether the cricoid can be closed adequately over an age-appropriate endotracheal tube. If this is possible, the lower end of the keel should not extend beyond the cricothyroid membrane. If it is not possible, an anterior cartilage graft is placed in the anterior cricoid, distal to the keel. The keel is removed through an open approach between ten days and four weeks postoperatively. The resultant midline deficit in the thyroid ala is then closed with laterally placed mattress sutures, as the cartilage edges of the laryngofissure are friable and easily damaged if sutures pull out. For this reason, antibiotic coverage and antireflux measures are advised during the period that the keel is in place, and for an additional few days after keel removal. Endoscopic placement of the laryngeal keel is also a consideration, although this is technically more challenging and may require more specialized equipment. Acquired anterior glottic webs Anterior glottic webs are most commonly congenital in origin, and are usually associated with a subglottic extension of the web resulting in coexistent subglottic stenosis (see Chapter 88, Congenital disorders of the larynx, trachea and bronchi). There are two common aetiologies: anterior neck trauma, often associated with a fractured larynx; and iatrogenic damage, often associated with injudicious use of a laser at the anterior commissure while managing laryngeal papillomatosis. It is rare for prolonged intubation to induce anterior glottic stenosis unless there is also associated subglottic stenosis. The management of acquired anterior glottic stenosis differs significantly from the management of the congenital anterior glottic web. The latter has normal mucosa within the remaining glottic inlet, and during reconstruction there may be sufficient mobility of the mucosal layer to reconstruct the anterior commissure without requiring the use of a laryngeal keel. In contrast, acquired anterior glottic stenosis is, by definition, associated with fibrosis and scarring. As such, during reconstruction, following laryngofissure, the mucosa is fibrotic and not amenable to reconstruction of the anterior commissure. Therefore, reconstruction with placement of a laryngeal keel is mandatory while the raw surfaces on either side of the laryngofissure remucosalize. The usual technique for repair of an acquired anterior glottic web is an open approach with complete laryngofissure, and it is recommended that this is performed with endoscopic guidance. With the laryngofissure complete, the demucosalized raw scar of the anterior vocal folds are noted and, in some cases, there may be enough mucosal mobility to place a pexing suture from the cut edge of the mucosa on either side toward the thyroid ala. Unlike repair of congenital anterior glottic webs, it is unusual to be able to pex the mucosal edge up to the anterior commissure, hence the need for a laryngeal keel. The vertical height of the keel Posterior glottic stenosis Posterior glottic stenosis is frequently misdiagnosed and often confused with bilateral true vocal cord paralysis. The most frequent aetiology of this condition is prolonged intubation, with the older child being at greater risk than the neonate. The posterior glottis is also susceptible to damage from thermal injury caused by inhalational or airway fires, or to iatrogenic damage from use of the laser in the posterior commissure. Occasionally, posterior glottic stenosis may be a result of direct laryngeal trauma. If not already tracheotomy dependent, patients present with stridor and exertional dyspnoea. Normal vocal function is usually preserved and, in this regard, presenting symptomatology is extremely similar to that seen in bilateral vocal cord paralysis.

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