摘要经外周静脉穿刺置人中心静脉导管（peripherally inserted central catheter，PICC）因其操作简单安全、成功率高、留置时间长、感染率低、病人舒适度高、并发症少等特点被广泛应用于临床，然而，因其置人导管较长、病人血管变异、穿刺者置人手法等因素，置管过程中很容易发生导管异位[1.2]。
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