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【8】环甲膜穿刺术.ppt

  • 2026-04-03 13:03:28
【8】环甲膜穿刺术.ppt

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先看看我写的学习笔记,PPT往下翻

一、定义与解剖基础

  1. 定义:紧急气道建立技术,穿刺甲状软骨与环状软骨间的环甲膜,建立临时人工气道,缓解急性上呼吸道梗阻引发的严重呼吸困难或窒息。
  2. 解剖位置:颈前正中,连接甲状软骨下缘与环状软骨弓上缘的纤维结缔组织膜,呈等腰三角形 / 梯形,厚约 1-2 毫米。
  3. 定位方法
    • 低头摸喉结(甲状软骨),向下 2-3 厘米处黄豆大小凹陷即为环甲膜。
    • 从下颌骨下移,“第一个隆起” 是甲状软骨,再下移 “第一个凹陷” 为环甲膜。
    • 颈部粗短、肥胖、甲状腺肿大者,可用气道超声辅助定位。

二、适用情况与禁忌证

(一)适应证

分类
具体内容
急性上呼吸道梗阻
异物吸入、喉头水肿、喉痉挛等导致的气道阻塞
喉源性呼吸困难
1. 白喉、急性会厌炎、喉部脓肿等急性化脓性感染2. 过敏反应引发的喉头水肿
头面部严重外伤
无法从口 / 鼻气管插管
气管插管禁忌 / 紧急情况
牙关紧闭无法插管,且来不及气管切开
颈部畸形 / 外伤
1. 无法暴露声门插管2. 无法摆手术体位,气管切开困难
基层医院条件限制
无气管插管和气管切开条件
特殊医疗需求
1. 气管内注射表面麻醉药、治疗药物2. 导引支气管留置给药管3. 湿化痰液

(二)禁忌证

  1. 相对禁忌证
    (非紧急时谨慎):环甲膜水平以下气道梗阻;严重出血倾向;穿刺区域有恶性病变、感染、外伤或手术史;躁动 / 极度不配合;无法明确触及环甲膜;环甲膜下方占位或肿瘤;急性喉头感染或创伤。
  2. 无绝对禁忌证:紧急情况下,优先挽救生命,权衡利弊后仍可操作。

三、操作流程

(一)术前准备

  1. 患者准备:评估意识、呼吸、循环等生命体征;解释操作(紧急时省略);取仰卧位(肩下垫枕、头后仰),无法耐受者取半坐卧位,暴露颈部。
  2. 环境准备:保证操作区光线充足;准备简易呼吸器、吸引器等急救设备;紧急时简化步骤,尽量无菌操作。
  3. 物品准备:16 号粗针头 / 专用穿刺针、注射器(2ml/5ml/20ml)、T 形管(通气用)、氧气及连接管、消毒用品、无菌手套、局部麻醉药(紧急时省略)、无菌纱布棉球、支气管留置给药管(必要时)。

(二)操作步骤

  1. 定位:示指摸甲状软骨与环状软骨间凹陷,确定中点为穿刺点;颈部粗短 / 肥胖者用超声辅助。
  2. 消毒与麻醉:穿刺点为中心,直径 10 厘米以上消毒至少 2 遍;时间允许时用 2% 利多卡因局部麻醉,紧急 / 昏迷者省略。
  3. 穿刺:左手固定穿刺部位皮肤,右手持针垂直颈部刺入,感落空感(进入喉腔)即停针;回抽有空气、患者反射性咳嗽、挤压胸部针头有气体逸出,均提示穿刺成功。
  4. 后续操作
    • 通气:T 形管上臂接针头,下臂接氧气,间歇性堵上臂开口人工呼吸。
    • 注药:用 7-9 号针头注药后拔针,压迫穿刺点片刻。
    • 留置给药管:拔针后纱布包裹固定导管。
  5. 术后处理:分类处置医疗垃圾;记录操作、患者反应及处理;密切观察生命体征,尤其呼吸。

(三)操作要点与难点

  1. 定位关键:识别甲状软骨和环状软骨;肥胖 / 短颈者仔细触诊或超声定位;穿刺点在正中线,防血管损伤。
  2. 深度控制:一般 2-3 厘米,依体型调整,感落空感即停,防损伤气管后壁或食管;保持针头垂直,避免偏移。
  3. 特殊情况:牙关紧闭者,穿刺为重要替代选择;颈部创伤者调整体位,优先保证气道通畅;儿童用专用针,操作更精细。
  4. 速度要求:紧急抢救需争分夺秒,熟练者数秒完成,确保操作准确。

四、并发症及处理

(一)出血与血肿形成

  1. 表现:穿刺点渗血 / 活动性出血、颈部肿胀血肿;严重时气道受压、血液入气管致呛咳咯血。
  2. 处理:轻度压迫 5-10 分钟;中度加用凝血酶;严重者血管栓塞或手术止血;血液入气管则头偏向一侧,鼓励咳嗽,必要时清除。
  3. 预防:评估凝血功能;准确定位,避偏离中线;轻柔操作,避反复穿刺;超声引导难定位者。

(二)皮下气肿与纵隔气肿

  1. 表现:皮下气肿见颈部肿胀、皮肤发紧、触诊捻发感;纵隔气肿伴胸骨后疼痛、呼吸困难加重,严重影响心脏功能。
  2. 处理:轻度皮下气肿无需处理,1-2 周自吸收;中度观察;严重者扩大切口排气,纵隔气肿需引流。
  3. 预防:选适当大小穿刺针;固定针头导管;避长时间高压通气;梗阻解除后尽快过渡到稳定气道管理(如气管切开)。

(三)气胸与血气胸

  1. 表现:突发针刺样胸痛、呼吸困难加重、干咳;患侧胸部饱满、呼吸减弱、叩诊鼓音;严重者呼吸衰竭、休克。
  2. 处理:少量气胸(肺压缩 <20%)观察吸氧;中量(20%-50%)穿刺抽气;大量(>50%)或张力性气胸行胸腔闭式引流;血气胸依出血量处理,必要时手术。
  3. 预防:掌握正确穿刺深度角度;保持针头垂直;儿童减少穿刺深度;评估肺部情况,肺病患者谨慎操作。

(四)食管穿孔与气管食管瘘

  1. 表现:吞咽疼痛困难、颈胸部皮下气肿、口鼻反流食物液体;严重者纵隔炎、脓胸。
  2. 处理:停经口进食,改胃肠外营养 / 鼻饲;用广谱抗生素;小穿孔观察,大穿孔或瘘管需手术修补。
  3. 预防:控制穿刺深度,避过深;保持垂直穿刺,避后倾;观察患者反应,异常即停;超声引导难定位者。

(五)感染与其他并发症

  1. 感染
    • 表现:穿刺点红肿痛、有分泌物;发热、白细胞升高等全身症状;严重者颈部蜂窝织炎、纵隔炎、肺炎。
    • 处理:局部感染加强换药,用抗生素软膏;全身感染用敏感抗生素;脓肿切开引流。
    • 预防:严格无菌操作;洗手戴无菌手套,用无菌器械;保持穿刺点清洁;紧急消毒不严格时预防性用抗生素。
  2. 其他并发症
    • 假道形成:通气不佳,重新穿刺确保针尖在气管内。
    • 声带损伤:声音嘶哑,禁声休息,必要时用糖皮质激素。
    • 喉 / 气管狭窄:瘢痕导致,依狭窄程度行扩张、支架置入或手术。

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  1. CONNECT:[ UseTime:0.001184s ] mysql:host=127.0.0.1;port=3306;dbname=h_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001660s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.004263s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000682s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001484s ]
  6. SELECT * FROM `set` [ RunTime:0.000615s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001716s ]
  8. SELECT * FROM `article` WHERE `id` = 479756 LIMIT 1 [ RunTime:0.001192s ]
  9. UPDATE `article` SET `lasttime` = 1775517351 WHERE `id` = 479756 [ RunTime:0.022599s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000588s ]
  11. SELECT * FROM `article` WHERE `id` < 479756 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001198s ]
  12. SELECT * FROM `article` WHERE `id` > 479756 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001148s ]
  13. SELECT * FROM `article` WHERE `id` < 479756 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.001865s ]
  14. SELECT * FROM `article` WHERE `id` < 479756 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.001831s ]
  15. SELECT * FROM `article` WHERE `id` < 479756 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.011819s ]
0.198482s