呼吸机压力限制通气和指令分钟通气及其临床应用

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                    <section><section powered-by="gulangu"><section><section><p><img src="image/20201019/e5e7e34f8d69e7d33c5e008e02e20732_1.gif" /></p></section></section></section><section powered-by="gulangu"><section><section><p>压力限制通气及其临床应用</p></section> <p><img src="image/20201019/a21774eb497bb25ac00d9168c8f29637_2.png" /></p> <section></section></section></section><section powered-by="gulangu"><section><section><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;压力限制通气(pressure limit ventilation)通过设定一限压Pmax的方式来阻止压力的升高，同时维持所设定的潮气量。如果压力曲线可见平台压或和流量曲线可见吸呼气之间有短暂的无流速期即可判断潮气量保持恒定。</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;呼吸机可通过降低吸气流速来实现该通气功能，同时能限制峰压的过高。</p></section></section></section><section powered-by="gulangu"><section><section><p><img src="image/20201019/4e45958a770142750d24cb5f3ee143dc_3.jpg" /></p></section></section></section><section powered-by="gulangu"><section><section><p>指令分钟通气及其临床使用</p></section> <p><img src="image/20201019/a21774eb497bb25ac00d9168c8f29637_2.png" /></p> <section></section></section></section><section powered-by="gulangu"><section><section><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;指令分钟通气（mandatory minute ventilation，MMV）只是在自主呼吸不足且已降至预设最低通气之下才启动的指令通气最低通气由设定的VT和f 乘积来控制指令通气非规则性给予，只是在通气不足时启动。</p><p>&nbsp; &nbsp; &nbsp; &nbsp; 当自主呼吸充分时，指令通气不起作用；自主呼吸不充分，给予间歇性指令通气（预设VT）；无自主呼吸，以预设的频率通气。<span>&nbsp;</span></p><p>&nbsp; &nbsp; &nbsp; &nbsp; 当自主呼吸接近最低通气，呼吸机在IMV时间内快速反应。当自主呼吸超过设定的最低通气，呼吸机耐受一较长的呼吸暂停（如在一阵强呼吸后突然呼吸暂停，反应时间是7.5秒加触发时间后给予一个IMV）。呼吸机将触发窒息报警。<span>临床上对于一些浅快呼吸的患者不适用该通气方式。</span></p></section></section></section><section powered-by="gulangu"><section><section><p><img src="image/20201019/d2cf9eaa28456659454e2b64df16d83f_5.jpg" /></p></section></section></section><section powered-by="gulangu"><section><section><p><br  /></p></section></section></section><section powered-by="gulangu"><section><section> <section powered-by="gulangu"><section><section><p>欢</p></section></section></section> </section><section> <section powered-by="gulangu"><section><section><p>迎</p></section></section></section> </section><section> <section powered-by="gulangu"><section><section><p>关</p></section></section></section> </section><section> <section powered-by="gulangu"><section><section><p>注</p></section></section></section> </section></section></section><section powered-by="gulangu"><section><section><p><br  /></p></section></section></section><section powered-by="gulangu"><section><section> <section powered-by="gulangu"><section><section><p><img src="image/20201019/49692c66e805e7714887253296dfca5f_6.jpg" /></p></section></section></section> </section><section> <section powered-by="gulangu"><section><section> </section></section></section> </section><section> <section powered-by="gulangu"><section><section><p>关注我们</p><p>一起涨姿势！</p></section></section></section> </section></section></section></section>