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【护理PPT】呼吸机规范操作及使用

  • 2026-04-19 20:22:51
【护理PPT】呼吸机规范操作及使用

各位同仁,大家好!今天为大家讲解呼吸机规范操作及使用的核心内容,聚焦前16页的呼吸机使用护理知识,从基础认知到模式、参数设置,梳理实操关键要点。

首先,什么是呼吸机?它是替代、控制或改变人体正常生理呼吸的装置,能增加肺通气量、改善呼吸功能、减轻呼吸消耗,节约心脏储备能力,是重症救治的重要设备。

使用呼吸机的核心目的有五点:纠正低氧血症、缓解呼吸窘迫、降低心脏负荷、改善呼吸肌疲劳、调节酸碱失衡,以此维持患者呼吸和内环境稳定。

接下来是适应症和禁忌症,这是临床应用的前提。适应症为:严重呼吸困难伴辅助呼吸肌参与;呼吸频率>35次/分或<6次/分;PaO2<40mmHg或氧合指数<200mmHg;呼吸性酸中毒PH<7.20;神志意识障碍、呼吸不规则。

禁忌症多为相对性,未经处理不宜使用:气道梗阻未解除的大咯血/严重误吸窒息;未处理的严重血气胸、肺大疱等;低血容量休克、急性心梗、气管食管瘘。

呼吸机按应用类型分两类:控制性机械通气(CMV),适用于自主呼吸减弱/消失者,完全由机器控制呼吸;辅助性机械通气(AMV),由患者自主吸气触发,机器辅助完成通气。

临床核心的四种通气模式,各有适用场景和特点:

1.间歇指令正压通气(IPPV):机器强制送气,不受自主呼吸影响,适用于呼吸停止、严重呼吸功能低下者,是慢阻肺伴严重呼吸肌疲劳的首选。优势是呼吸肌充分休息,缺点易致呼吸机依赖、人机对抗,可能通气过度。

2.同步间歇指令通气(SIMV):预设参数送气,可感知自主呼吸并同步辅助,适用于自主呼吸不足者,也是脱机过渡的常用模式。结合指令与自主呼吸,能锻炼呼吸肌,但若参数设置不当易致呼吸肌疲劳,可联合PSV、CPAP使用。

3.持续气道正压通气(CPAP):患者需有稳定呼吸驱动力,全程气道施正压,防止气道萎陷、提升氧合。适用于弥漫性肺病变致呼吸衰竭(低氧血症)、鼾症睡眠呼吸暂停及急性心衰抢救。

4.双水平气道正压通气(BIPAP):吸/呼气相给予不同水平正压,患者可全程自主呼吸,适用范围极广,从无自主呼吸重症患者到拔管前过渡患者均可用。

呼吸机基本参数设置,前四项核心参数需精准把控:

1.潮气量(VT):容量控制模式用,成人常规515ml/kg,812ml/kg最常用;ARDS等限制性肺疾病用小潮气量,4~7ml/kg。

2.吸气时间(Tinsp):常规0.8~1.2s,慢阻肺患者缩短,ARDS患者可适当延长。

3.呼吸频率(f):决定呼吸周期,常规12~20次/分,ARDS等需>20次/分的高频率。

4.氧浓度(FiO2):长期使用≤50%防氧中毒;急救需>50%时,持续不超24小时,若此浓度下血氧仍低,加通气量或PEEP,而非继续提氧浓度。

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  1. CONNECT:[ UseTime:0.000573s ] mysql:host=127.0.0.1;port=3306;dbname=h_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000940s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000329s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000231s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000498s ]
  6. SELECT * FROM `set` [ RunTime:0.000189s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000527s ]
  8. SELECT * FROM `article` WHERE `id` = 487440 LIMIT 1 [ RunTime:0.000449s ]
  9. UPDATE `article` SET `lasttime` = 1776847222 WHERE `id` = 487440 [ RunTime:0.000757s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000242s ]
  11. SELECT * FROM `article` WHERE `id` < 487440 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000412s ]
  12. SELECT * FROM `article` WHERE `id` > 487440 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000391s ]
  13. SELECT * FROM `article` WHERE `id` < 487440 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000641s ]
  14. SELECT * FROM `article` WHERE `id` < 487440 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000892s ]
  15. SELECT * FROM `article` WHERE `id` < 487440 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000744s ]
0.078321s