[Pseudomembranous supraglottitis with airway compromise in a patient with recurrent tonsillar carcinoma].

PURPOSE: In this report, we discuss a patient with acute pseudomembranous supraglottitis complicating recurrent tonsillar carcinoma and describe the ramifications of these disorders on perioperative management. CLINICAL FEATURES: The patient was an acutely ill man with a history of right tonsillar carcinoma originally treated with chemoradiation therapy and a radical neck dissection who presented with a brief history of fever, dyspnea, and stridor. The soft tissue of his neck was very stiff, his neck mobility was limited, and his mouth opening was restricted by pain and radiation-induced fibrosis. A nasal flexible fibreoptic laryngoscopy revealed a very large, indurated epiglottis almost completely obstructing the glottis. The aryepiglottic folds and false cords were edematous, and a gray pseudomembranous exudate was observed on the glottic surface, epiglottis, and true vocal cords. An elective tracheostomy was performed in the operating room using local anesthesia, and conscious sedation was avoided because of the potential for complete airway obstruction. General anesthesia was induced after the airway was secured, but trismus and tissue edema resulting from the acute infection made the glottis and surrounding structures nearly impossible to visualize during direct laryngoscopy. The patient was treated with intravenous antibiotics, and a subsequent direct laryngoscopy demonstrated tumour recurrence. CONCLUSIONS: The case emphasizes that the perioperative management of imminent airway obstruction by acute supraglottitis complicating recurrent oropharyngeal cancer may optimally be approached by establishing a surgical airway under controlled operating conditions.

Management of ileostomy trauma produced by a dog bite in a patient with thoracic paraplegia.

Urologic trauma produced by dog bites is uncommon. Several previous single reports and small case series have described the treatment of dog bite-induced injuries to the external genitalia. In this report, we describe our treatment of a patient with thoracic paraplegia and an ileal conduit who had extensive trauma to his ileostomy as a result of a bite by the family dog. To our knowledge, the current case is the first report of dog bite-induced ileostomy trauma.

Anandamide content and interaction of endocannabinoid/GABA modulatory effects in the NTS on baroreflex-evoked sympathoinhibition.

Cannabinoids have been shown to modulate central autonomic regulation and baroreflex control of blood pressure (BP). The presence of cannabinoid CB(1) receptors on fibers in the nucleus tractus solitarius (NTS) suggests that some presynaptic modulation of transmitter release could occur in this region, which receives direct afferent projections from arterial baroreceptors and cardiac mechanoreceptors. This study, therefore, was performed to determine the mechanism(s) of effects of microinjection of an endocannabinoid, arachidonylethanolamide (anandamide, AEA), into the NTS on baroreflex sympathetic nerve responses produced by phenylephrine-induced pressure changes in anesthetized rats. AEA prolonged reflex inhibition of renal sympathetic nerve activity (RSNA), suggesting an increase in baroreflex sensitivity. This effect of AEA was blocked by prior microinjection of SR-141716 to block cannabinoid CB(1) receptors. To determine whether this baroreflex enhancement by AEA involved a GABA(A) mechanism, the baroreflex response to AEA was tested after prior blockade of postsynaptic GABA(A) receptors by bicuculline, which would eliminate any effects due to modulation of GABA activity. After bicuculline, which alone prolonged the baroreflex inhibition of RSNA, AEA shortened the duration of RSNA inhibition, suggesting a possible presynaptic inhibition of glutamate release previously obscured by a more dominant GABA(A) effect. To support a possible physiological role for AEA, AEA concentration in the NTS was measured after a phenylephrine-induced increase in BP. AEA content in the NTS was increased significantly over that in normotensive animals. These results support the hypothesis that AEA content is increased by brief periods of hypertension and suggest that AEA can modulate the baroreflex through activation of CB(1) receptors within the NTS, possibly modulating effectiveness of GABA and/or glutamate neurotransmission.