Increase the amount of transfusion can depress dynamic lung compliance and delay trachea canula extubated time.

液体总入量的增加可降低术后肺顺应性，延长术后拔管时间。

Conclusions The health education to patients with PICC in applying canula period was an important factor for PICC indwelled safely.

结论围置管期病人健康教育是PICC安全留置的重要保障。