Temporary central venous catheters are usually placed in the internal jugular vein or femoral vein, and dialysis can be started immediately after placement. The internal jugular vein catheter is the most commonly used, and the following points should be noted after the catheter is placed: 1. The neck can be moved normally without affecting daily life, but the activities should be moderate, and care should be taken when dressing and undressing so as not to dislodge the catheter. 2, pay attention to keep the dressing at the placement clean and dry, if there is moisture or pollution should be promptly changed dressing, the purpose is to prevent infection, try to extend the use of the catheter time. 3.The catheter can be removed after the internal fistula is mature.