如何做到安静、无呛咳地全麻拔管?

2021-11-21 麻醉逻辑 麻醉逻辑

这些技巧要掌握!

全身麻醉分为诱导、维持与苏醒,每一个过程都非常重要,也是麻醉的核心技术;但要问哪个阶段最能体现麻醉医生水平,特别是对于患者的体验或手术医生的感受,苏醒的质量绝对是最直观的;苏醒就如台上一分钟,需要坚实的台下十年功,完美的诱导与平稳的维持才会换来最后高质量的苏醒。

高质量的苏醒如何做到?我想多数人最直观的感受应该是安静、无呛咳地全麻拔管;患者从睡梦中醒来,自己缓缓睁开眼睛、呼吸规律有力、呼之配合自如、安静无呛咳,然后轻松写意地拔除导管,为此次麻醉画上圆满的句号,甚至患者还可以自己挪床,这应该是所有麻醉医生的职业追求。

有文献报道,全身麻醉期间呛咳发生率高达76%-96%,这其中拔管时发生呛咳反应占绝大多数。呛咳反应带来的副作用不言而喻,严重的血管反应以及麻醉医生的狼狈应对是最致命的;以下从对拔管呛咳反应的风险识别、预防与应对三方面简要总结:

1、有研究表明,存在于脑干中的μκ受体负责调节呛咳反射,而阿片类药物可以通过与其结合产生抑制呛咳反射的作用;同时女性存在更高的可用性μ型阿片受体,所以相对男性,在使用同等阿片类药物时女性更不容易呛咳。

2、有报道,咳嗽发生率和严重程度取决于拔管时剩余镇静药的残余浓度;而当七氟醚低于0.6%时呛咳就会发生,有研究表明同样条件下,丙泊酚组拔管指征出现的更早,有更深的残余麻醉效应,导致丙泊酚呛咳反应更少。

3、吸烟会引起气道高反应性,明显增加呛咳的发生率;有研究显示,全麻下行颈椎手术的患者,吸烟者呛咳发生率为50%,而非吸烟者为17%

所以,男性、吸醚、吸烟是拔管时呛咳的高危因素。

对于拔管时呛咳反应的预防,主要是以下方法:

1、阿片类药物

建议舒芬太尼(0.1ug/kg)、芬太尼(1ug/kg)提前20-30min推注;拔管前继续泵注瑞芬太尼(0.05ug/kg.min)或TCI维持1.0~1.5ng/ml也有类似的效果,但临床中发现瑞芬对呼吸抑制更强,应警惕。

2、利多卡因

最常用的方法是静脉注射1.0~1.5mg/kg,但研究发现效果不一;拔管前5分钟气管内喷洒1mg/kg效果更佳,渗透性更好的碱化利多卡因套囊内填充效果更好。

3、右美托咪定

由于可能影响苏醒,手术结束半小时前开始泵注,用量为0.5ug/kg

除此以外,拔管前30min静脉注射曲马多1mg/kg能减少呛咳的发生,拔管前2-5min艾司洛尔1.5mg/kg能较大程度抑制呛咳引起的心血管反应,但无预防作用。

虽有多种办法预防,但仍不时有漏网之鱼,出现呛咳时绝不可第一时间拔管,减少不必要的刺激多数呛咳反应可缓慢平静,再评估意识与肌松残留,决定拔管时机;如出现强烈的呛咳反应,伴有血流动力学明显波动,应第一时间镇静,建议首选起效最快的丙泊酚20-50mg,但需严密观察自主呼吸情况,再择机评估拔管。

拔管的常规准备有:确保神经肌肉阻滞完全被逆转或恢复、血流动力学稳定、体温正常、充分的镇痛。在没有肌松监测的条件下,呛咳反应极大的干扰了麻醉医生对肌松残留的评估;尽量避免高危因素、做好预防措施、留好抑制呛咳反应的后路,才能做到万无一失。

综上所述,无论是让患者达到安静的醒过来,还是预防呛咳反应,充分的镇痛才是最重要的,特别是长时间、大创伤的手术,建议首选舒芬太尼、芬太尼,次选右美、利多卡因;一点体会,欢迎讨论。

参考文献:

吴茄茄, 岳子勇. 全身麻醉拔管呛咳的研究进展[J]. 医学综述, 2018(1):150-154.

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    2021-12-13 123a16c8m00暂无昵称

    受益匪浅

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    2021-11-23 steven_u4
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    2021-11-23 pps20021
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    2021-11-22 查查佳佳

    中位随访时间分别为10.7个月(范围= 0.2

    0

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