目的 探讨改良留置气泡技术对肌内注射药液外渗的影响。方法 选取在门诊注射室进行肌内注射的患者359例,按随机数字表法将研究对象分为3组,其中试验组120例、对照一组120例、对照二组119例。试验组采用改良留置气泡技术,对照一组采用留置气泡技术,对照二组采用常规肌内注射法,观察3组患者肌内注射操作药液外渗情况。结果 试验组改良留置气泡技术的药液外渗率为13.3%,低于对照一组（23.3%）和对照二组（31.1%）的药液外渗率,差异有统计学意义（ χ²=10.847,P<0.05）。结论 改良留置气泡技术可降低肌内注射药液外渗的发生率,留置气泡技术操作的适宜体位为侧卧位。

Objective To explore the effects of the practice of modified indwelling bubble technique on the spillover of intramuscular injection. Methods A randomized controlled trial was adopted to select 359 patients who were injected intramuscularly in the outpatient injection room,and were divided into three groups:120 cases in the experimental group,120 cases in the control group 1,and 119 cases in the control group 2. The experimental group used modified indwelling bubble technique,the control group 1 used indwelling bubble technique,and the control group 2 used conventional intramuscular injection. The spillover situation of the intramuscular injection of the three groups of patients was observed among these three groups. Results The drug extravasation rate of the modified indwelling bubble technique in the experimental group was 13.3%,which was lower than that of the control group 1 and the control group 2（ χ²=10.847,P<0.05）. Conclusion The improved indwelling bubble technique can reduce the spillover of intramuscular injections. The suitable position for the indwelling bubble technique is the lateral position.