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【65】中心静脉压测定.ppt

  • 2026-07-21 04:09:27
【65】中心静脉压测定.ppt

PPT页数:14 页

先看看我写的学习笔记,PPT往下翻~

一、基础概念

1.1 定义

  • 中心静脉压指胸腔段上、下腔静脉及右心房内部压力数值。

1.2 临床意义

  • 指标可直接反映右心房压力水平;主要受心脏收缩功能、全身有效循环血容量、外周血管张力三类因素影响。
  • 属于核心血流动力学监测指标,用于评估容量负荷、判断右心功能状态。

二、适用人群(适应证)

1.1 危重循环疾病患者

  • 各类严重创伤、休克、急性循环衰竭人群。

1.2 补液管控人群

  • 需要大量、快速静脉补液,同时合并心脏基础疾病的患者。

1.3 围手术期患者

  • 大型心血管、颅脑、腹腔手术术中及术后监测。

1.4 长期静脉治疗人群

  • 需长期输液、完全胃肠外营养支持患者。

三、操作禁忌证

1.1 局部穿刺禁忌

  • 穿刺、切开部位皮肤软组织存在感染病灶。

1.2 全身凝血禁忌

  • 存在严重凝血功能障碍,出血风险显著升高。

四、完整操作方法

4.1 术前基础准备

  1. 患者保持标准仰卧体位,选定穿刺部位。
  2. 穿刺区域皮肤常规消毒,铺设无菌洞巾。
  3. 2% 利多卡因实施局部浸润麻醉。

4.2 两类插管途径

4.2.1 经皮穿刺法(临床首选)

  • 穿刺血管选择:右侧颈内静脉、颈外静脉、锁骨下静脉(至上腔静脉);股静脉(至下腔静脉)。
  • 优劣对比:上腔静脉通路测量数值更精准;腹腔压力升高时,下腔静脉压力结果存在明显偏差。

4.2. 静脉切开法(少用)

  • 仅适用于大隐静脉切开插管,导管延伸至下腔静脉。

4.3 四种穿刺插管操作细则

4.3.1 右侧颈内静脉穿刺

  • 穿刺定位:胸锁乳突肌三头形成三角区顶端;肥胖患者取锁骨上缘 3cm、颈中线旁 3cm 交点。
  • 进针角度:与人体冠状面呈 30°,向下、向后、向外朝向胸锁乳突肌锁骨头锁骨后方。
  • 操作流程:边进针边回抽,阻力消失、顺利回血后再深入 2~3mm;拔除注射器即刻封堵针头防空气进入;置入导管深度约 15cm 直达上腔静脉。

4.3.2 右侧颈外静脉穿刺

  • 体位:头低脚高位,躯体倾斜 20°,保证吸气时静脉不完全塌陷。
  • 操作:粗针连接注射器向心脏方向置管,导管末端至右侧第二胸骨旁肋间隙,置入长度 12~15cm;全程严防空气栓塞。

4.3.3 锁骨下静脉穿刺

  • 体位:仰卧,穿刺侧上肢外展 80°~90°。
  • 定位:锁骨内 1/3 分界点下方 1cm。
  • 进针角度:与胸壁皮肤呈 20°~30°,朝向胸锁关节,进针深度约 3cm。
  • 置管长度:右侧 10cm,左侧 12~15cm。

4.3.4 大隐静脉切开插管

  • 切口位置:腹股沟韧带下方 3cm,股动脉内侧 1cm,纵行切口 3~4cm。
  • 操作:分离暴露大隐静脉后置管;成人置入长度 40~50cm,导管末端至剑突上方 3~4cm;遇阻力小幅后退调整角度再送入。

4.4 两种测压操作模式

4.4.1 简易水柱测压装置

  • 器材:0.8~1.0cm 内径玻璃测压管、cmH₂O 刻度标尺、三通 Y 形连接管、输液装置。
  • 前置准备:整套管路、中心导管预先充满生理盐水,彻底排尽全部气泡,测压管初始液面高于预估 CVP 数值。

4.4.2 监护仪换能器测压

  • 配套设备:心电监护、压力换能器、信号放大器、波形显示屏,可实时持续记录压力波形与数值。

4.5 水柱测压标准操作步骤

  1. 零点校准:测压标尺零点对齐患者右心房水平,体位变动后重新调零。
  2. 充盈管路:夹紧导管侧夹子,松开输液、测压管路夹子,液体灌满测压管,液面高于预估静脉压力。
  3. 隔绝输液:关闭输液管路夹子,打开导管连通三通,测压管液面自然下降至稳定刻度,读数即为 CVP。
  4. 恢复补液:测压完成后关闭测压通路,连通输液管路继续补液;每次测压后冲洗管内残留血液,防止导管堵塞。

五、操作关键注意事项

5.1 压力波形异常处理

  • 测压数值波动幅度突然明显升高,提示导管尖端进入右心室,需立即向外退出一小段导管后复测。

5.2 导管堵塞处理

  • 管路无回血、液体输注不通:优先使用输液生理盐水冲管;冲洗无效时采用肝素稀释液、3.8% 枸橼酸钠溶液疏通。

5.3 留置时限管理

  • 常规留置时长不超过 5 天;留置超过 3 天,每日使用抗凝冲洗液预防静脉血栓、血栓性静脉炎。

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  1. CONNECT:[ UseTime:0.000463s ] mysql:host=127.0.0.1;port=3306;dbname=h_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000709s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.101059s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.082411s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001655s ]
  6. SELECT * FROM `set` [ RunTime:0.008177s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001573s ]
  8. SELECT * FROM `article` WHERE `id` = 539751 LIMIT 1 [ RunTime:0.001785s ]
  9. UPDATE `article` SET `lasttime` = 1784860750 WHERE `id` = 539751 [ RunTime:0.074512s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000859s ]
  11. SELECT * FROM `article` WHERE `id` < 539751 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001504s ]
  12. SELECT * FROM `article` WHERE `id` > 539751 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.010150s ]
  13. SELECT * FROM `article` WHERE `id` < 539751 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.008588s ]
  14. SELECT * FROM `article` WHERE `id` < 539751 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.002843s ]
  15. SELECT * FROM `article` WHERE `id` < 539751 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.019043s ]
0.412011s