按压舌根部遏制小儿吐乳的机理研究

Study on Mechanism of Controlling Regurgitation of Milk in Infants by Pressure Applied to Root of Tongue

用31只猫在麻醉后由颈部食道切口送入气囊至胃记录其容积变化。机械刺激舌根部及咽部(按压刺激)可引起胃显著扩张,胃收缩幅度减小,胃紧张性下降及胃收缩间歇时间延长,从而降低胃内压力,防止胃内容物返流溢出。双侧切断颈迷走神经及麻醉口腔后部使反应消失,而静脉注射阿托品则不改变此反应。本研究表明,按压舌根部可反射性地引起胃容受性舒张,从而遏制吐乳。

Gastric volumes were recorded in 31 anesthetized cats by balloons inserted into the stomachs through esophageal inci- sions.Mechanical stimulation (mild pressure stimuli) applied to the posterior parts of tongues and pharynxes induced marked dilatation of stomachs,decrement of gastric contraction amplitudes,reduction of gastric tonus and prolonging the interval of intragastric pressure to prevent the gastric contents from regurgitation.The responses were abolished after bi- lateral vagotomy or local anesthetics applied to the posterior parts of oral cavity.Intravenous injection of atropine caused little alteration of the response,it is evident that pressure applied to the posterior part of tongue might induce gastric re- ceptive relaxation reflexly to prevent regurgitation of milk.