\n\n
普通胃镜检查时绝大多数患者有恶心呕吐,常有紧张、焦虑、恐惧情绪。无痛胃镜就是在普通胃镜检查的基础上增加了麻醉,患者可以很快进入鼾睡状态,并且麻醉后咽部的肌肉较松弛也有助于胃镜推进。总结一下,无痛胃镜具有以下优势:
\n\n丙泊酚作为无痛胃镜检查中应用的主要药物,对心血管具有一定作用,可以降低患者血压、减慢心率,一般不会出现房室传导阻滞现象。有些患者在应用丙泊酚后会出现注射部位疼痛,药物起效后疼痛感觉会消失。
\n\n除了普通胃镜的风险及并发症外,无痛胃镜的最主要风险来源于麻醉。目前常用的麻醉药都具有抑制呼吸的作用,无痛胃镜检查中所应用的药物可以减慢呼吸、降低血氧饱和度,甚至可导致呼吸暂停。因此,医生在麻醉时以及胃镜进入食管后都会使患者的头部后仰、下颌托起,保持呼吸通畅,插镜前也予以充分吸氧。若患者的呼吸道出现很多分泌物,医生会及时将其吸出,同时给予高流量吸氧,检查中也会密切观察患者的表情、呼吸、意识及血氧饱和度。
\n\n另一个风险是误吸。因此会要求患者在检查前必须禁食水 6 小时以上,患有幽门梗阻者禁食水甚至要延长到 12 小时以上,以免在检查过程中胃内容物反流入气管造成误吸。
\n\n由于无痛胃镜麻醉时间较短,麻醉风险要比长时间全麻的外科手术小很多,因此全麻后的昏迷、谵妄、幻听、幻视、躁动等都极为少见。
\n\n在进行无痛胃镜检查时最好有人陪伴,在患者从检查室出来后搀扶其静坐休息,喝一杯温开水。无痛胃镜术后 8 小时内患者禁食辛辣食物,不能饮酒,检查后的 24 小时内不能进行有危险性的行为,例如驾驶机动车辆、进行机械操作和从事高空作业,最好不要做需要精算和分析的工作。
\n\n无痛胃镜虽然也有风险,但医生会采取各种措施降低其发生率,考虑到其优势,患者可咨询医生根据自己的情况酌情考虑。(中国医科大学附属第一医院胃肠肿瘤外科于淼参与撰写)
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