近10余年来,呼吸器的应用在国内已日趋普及,成为抢救危重病人的重要治疗手段。因呼吸功能衰竭所致的病死率大为降低,为了达到解除低氧血症和高CO_2血症,并使血液pH正常的目的,必须在基础生理知识的指导下,熟悉呼吸器的工作原理和调节。现扼要介绍如下。机械呼吸的作用和利弊所有呼吸器都是通气机,用以辅助和控制病人的通气功能。它以正压吸气为手段提高通气量,从而解除低氧血症或高CO_2血症。吸气时的正压,对呼吸、循环既有有利一面,使用不当也有其不利一面。一、降低动脉血二氧化碳分压(PaC0_2)凡胸廓不能进行正常呼吸、肺部有疾病或气道阻塞以致肺泡通气量降低者,均有低氧血症和高CO_2血症(PaCO_2 In the past 10 years, the application of respirator has become increasingly popular in the country and has become an important treatment for critically ill patients. Due to respiratory failure caused by greatly reduced mortality, in order to achieve the lifting of hypoxemia and hypercapnia, and the normal blood pH purposes, must be under the guidance of basic physiological knowledge, familiar with the working principle of the respirator and adjust. Here is a brief introduction. The Role and Advantages and Disadvantages of Mechanical Breathing All ventilators are ventilators to assist and control the patient’s ventilatory function. It uses positive pressure as a means of breathing to improve ventilation, thereby relieving hypoxemia or hyper-CO 2 hyperlipidemia. Positive pressure during inspiration, on the breathing, cycling both beneficial side, improper use also has its disadvantageous side. First, lower arterial partial pressure of carbon dioxide (PaC0_2) Where the thorax can not be normal breathing, lung disease or airway obstruction, resulting in decreased alveolar ventilation were hypoxemia and hypercapnia (PaCO_2