Objective: To study the choice of two different size venous indwelling trocar that which were used in the elder patients with COPD.
目的：观察研究两种不同型号静脉留置针在高龄COPD病人中的应用选择。
Conclusion: the elder patients with COPD choose to use 24g venous indwelling trocar, the incidence of phlebitis could be reduced greatly, and the indwelling time could be prolonged.
结论：高龄COPD病人选用24 G型号留置针，可明显减少静脉炎的发生，延长留置时间。
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