The effect of tracheostomy on the laryngeal closure reflex.

摘要: The clinical observation of aspiration following prolonged tracheostomy prompted a neurophysiologic investigation the glottic closure reflex in dogs longitudinally evaluated after permanent tracheostomy. data support significant alterations central organization protective heretofore considered phylogenetically primitive and therefore physiologically stable over wide ranges functional demand. indicate that chronic upper airway bypass results in: 1. increased threshold evoked adductor response; 2. random shifts its latency; 3. rapid attenuation primary response to repetitive SLN stimulation; 4. reduced after-discharge activity, all which contribute weakened, ill-coordinated respons.