方法 对不同医院的首次输注化疗药物的患者静脉通路进行追踪观察，包括留置

Methods Follow up and observe the venous access of patients receiving chemotherapy drugs for the first time in different hospitals, including indwelling needle, PICC, CVC and other infusion access, compare the single use time and complications of different venous access, and count the venous access during treatment Tool usage.

Methods The intravenous pathways of patients with first infusion chemotherapy drugs in different hospitals were followed up and observed, including retention needles, PICCs, CVC and other infusion pathways, compared the single-use time of different vein pathways, the occurrence of complications, and the use of intravenous pathway tools in the course of treatment.

Methods the venous access of patients who received chemotherapy drugs for the first time in different hospitals was observed, including indwelling needle, PICC, CVC, etc. the single use time and complications of different venous access were compared, and the use of venous access tools in the treatment process was counted.