The digestive canal bleeds the application of sufferer trocar .

消化道出血患者套管针的应用。

To investigate the superficial venous trocar method for clinical application .

探讨浅静脉套管针的临床应用方法。

The pinhead of the trocar is big , so it will hurt you .

套管针的针头有些粗大，会有些疼。

To probe into the effect of applying detaining trocar in axillary vein for transfusion of burn infants .

探讨腋静脉留置套管针在婴幼儿烧伤输液中的临床应用效果。

Methods : trocar puncture was practiced under genuine direct vision after phlebotomy for 52 severe patients who failed undergoing venous puncture .

方法：对52例静脉穿刺失败的危重患者，采用静脉切开后直视下进行套管针穿刺。