Neural control of airway pressures in rabbits.

Acta physiologica Polonica Pub Date : 1990-01-01
B Kamosińska, M Szereda-Przestaszewska
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Abstract

In twenty anaesthetized and spontaneously breathing rabbits airway pressures were measured above and below the larynx during tidal respiration through the larynx. Peak inspiratory and expiratory pressures at both sites were recorded in control conditions and then compared to values obtained in the course of progressive denervation of the airways. The two methods of denervation consisted of (1) bilateral section of superior and recurrent laryngeal nerves and of the midcervical vagotomy (horizontal method); (2) right-sided sections of the three nerves followed by left-sided sections (vertical method). Motor denervation of the larynx due to RLNs neurotomy (horizontal method) produced significant increases in intratracheal pressures in both phases of the respiratory cycle. Less prominent increments in pressures were achieved on RLNs neurotomy in the vertical method. SLNs section and vagotomy had little additional effect on airway pressures. Our results indicate that unilateral laryngeal palsy poses far smaller obstruction to breathing than simultaneous bilateral denervation, and that afferent denervation of the larynx has no effect on airway pressures.

家兔气道压力的神经控制。
在20只麻醉自发呼吸的家兔中,通过喉部测量潮汐呼吸时喉部上下的气道压力。在对照条件下记录两个部位的吸气和呼气压力峰值,然后与气道进行性去神经支配过程中获得的值进行比较。两种断神经方法包括(1)双侧喉上、喉返神经段和颈中迷走神经切开术(水平法);(2)三神经右侧切片,然后左侧切片(垂直法)。由于RLNs神经切开术(水平法)导致喉部运动去神经支配在呼吸周期的两个阶段产生气管内压力的显著增加。在垂直方法中,RLNs神经切开术的压力增加不太明显。sln切片和迷走神经切开术对气道压力的影响较小。我们的研究结果表明,单侧喉麻痹对呼吸的阻碍远小于同时进行的双侧去神经支配,并且喉的传入去神经支配对气道压力没有影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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