：Objective To investigate the effect of pressure-resistant double-lumen peripherally inserted central catheterization(PICC)with different external length on pain, subcutaneous hemorrhage and comfort level of patients. Methods 〓Totally 121 patients undergoing pressure-resistant double-lumen PICC catheterization were assigned to the study group(n=59)and the control group(n=54, and 8 lost to follow-up). The pressure-resistant double-lumen PICC line was entirely inserted into the body in the control group. In the study group, the PICC line was placed with external length of 2 cm. The pain degree at puncture site at 24 hours, 48 hours, 3 day, 1 week and 4 weeks after catheter placement was evaluated. The subcutaneous hemorrhage and comfort level of patients were evaluated and compared between two groups. Results 〓The scores of pain intensity in the study group were lower than those in the control group at 24 hours and 48 hours after catheter placement(P0.05). The subcutaneous hemorrhage was more severe in the study group than that in the control group at 24 hours and 48 hours after catheter placement(P0.05). The scores of Visual analogue Scale(VAS)on comfort degree were higher in the study group than those in the control group at 3 day, 1 week and 4 weeks after catheter placement(P0.01). Conclusion 〓The placement methods with external length of 2 cm can reduce the pain intensity within 48 hours after PICC placement, and improve the long-term comfort of patients.
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