2000
DOI: 10.1097/00000542-200004000-00014
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The Incidence and Mechanisms of Pharyngeal and Upper Esophageal Dysfunction in Partially Paralyzed Humans

Abstract: Partial neuromuscular paralysis caused by atracurium is associated with a four- to fivefold increase in the incidence of misdirected swallowing. The mechanism behind the pharyngeal dysfunction is a delayed initiation of the swallowing reflex, impaired pharyngeal muscle function, and impaired coordination. The majority of misdirected swallows resulted in penetration of bolus to the larynx.

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Cited by 284 publications
(160 citation statements)
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“…Studies in postsurgical subjects have shown a high incidence of PORC at time of extubation whether or not reversal with neostigmine was administered. 21 PORC has been shown to result in impaired pharyngeal function and upper airway obstruction, 22,23 as well as reduction in peak expiratory flow and FVC. 24 An increase in postoperative respiratory complications, including the need for re-intubation, has been seen in patients with PORC.…”
Section: Residual Neuromuscular Blockadementioning
confidence: 99%
“…Studies in postsurgical subjects have shown a high incidence of PORC at time of extubation whether or not reversal with neostigmine was administered. 21 PORC has been shown to result in impaired pharyngeal function and upper airway obstruction, 22,23 as well as reduction in peak expiratory flow and FVC. 24 An increase in postoperative respiratory complications, including the need for re-intubation, has been seen in patients with PORC.…”
Section: Residual Neuromuscular Blockadementioning
confidence: 99%
“…After administration of a clinically used neuromuscular blocking agent (vecoronium) to human volunteers it was found that the inferior pharyngeal constrictor was less inhibited compared to the cricopharyngeus muscle, which behaved like the peripheral striated muscle during partial neuromuscular block (15,16). However, our results in the mouse show that the inferior pharyngeal constrictor has a similar sensitivity compared the diaphragm and slow skeletal muscles.…”
Section: Discussionmentioning
confidence: 58%
“…mordiendo un depresor lingual) el test más específico para detectar bloqueo residual, es decir, pocos pacientes con TOF-ratio > 0.9 no lo realizan correctamente (Figura 22) 87 . Sin embargo, estudios más recientes sugieren que se debe alcanzar un TOF-ratio < 0.9 para tener una mayor seguridad del paciente, ya que con un cociente < 0.9 se ha observado disfunción faríngea y riesgo aumentado de broncoaspiración en voluntarios sanos a los que se realizó videomanometría y mecanomiografía simultáneas 89,90 . Hallazgos similares 91 pero sin embargo los músculos implicados en la protección de la vía aérea son más sensibles a la presencia de pequeños grados de bloqueo residual, y con ratios < 0.8 el músculo constrictor faríngeo presenta una menor contracción Para ese grado de parálisis residual 91 los volúmenes teleinspiratorios a nivel de la vía aérea superior se encuentran disminuidos (por una reducción de las áreas retropalatina y retroglosa), por lo que el mecanismo implicado en la obstrucción parcial de la vía aérea superior parece ser la debilidad de los músculos dilatadores a ese nivel.…”
Section: Bloqueo Neuromuscular Residual (Bnmr)unclassified
“…mordiendo un depresor lingual) el test más específico para detectar bloqueo residual, es decir, pocos pacientes con TOF-ratio > 0.9 no lo realizan correctamente (Figura 22) 87 . Sin embargo, estudios más recientes sugieren que se debe alcanzar un TOF-ratio < 0.9 para tener una mayor seguridad del paciente, ya que con un cociente < 0.9 se ha observado disfunción faríngea y riesgo aumentado de broncoaspiración en voluntarios sanos a los que se realizó videomanometría y mecanomiografía simultáneas 89,90 . Hallazgos similares 91 reflejan un flujo inspiratorio irregular y una obstrucción parcial de la vía aérea para valores de 0.8.…”
unclassified