摘要:中心静脉穿刺置管的并发症包括误伤动脉、气胸、血胸、血肿和导管位置异常等,其发生率可高达10%,颈内静脉置管失败率可超过19%[1,2]。如何提高颈内静脉穿刺成功率,减少并发症发生率具有重要意义。在麻醉后使用呼气末正压可以提高颈内静脉充盈度,从而提高穿刺成功率[3]。但对于清醒患者能否通过Valsalva动作提高穿刺成功率,文献报道很少。
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