夏季外周静脉留置针与细菌定植的相关性研究

Relationship Between Optimal Time Duration to Use Peripheral Vein Catheter and Bacterium Colonization in Summer Season

目的研究夏季外周静脉留置针留置时间与细菌定植关系,探讨夏季留置针留置的最佳时间。方法将符合纳入标准的患者按留置时间分为4组,每组选取20例,对每例患者消毒前、消毒后、拔针时皮肤采样及血管内导管作细菌培养,比较菌落数和菌种分布。结果留置时间越长,穿刺部位细菌定植阳性率越高;〉96 h,静脉导管有细菌定植（10%）,〉120 h,阳性率（40%）明显升高。结论夏季外周静脉留置针最佳留置时间为72~96 h。

OBJECTIVE To study the relationship between how long to use peripheral vein catheter and bacterium colonization, then to make an approach to the optimal time duration of using peripheral vein catheter in summer season from infection prevention viewpoint. METHODS To divide the patients into four groups according to the different time duration of using peripheral vein catheter, and select 20 samples at random in every group. Make bacterial culture from skin （before sterilization,after sterilization and withdrawal of needles） and the catheter,and compare the colony number and strain distribution. RESULTS There was bacterium colonization on punctured skin after using peripheral vein catheter for a long time. The longer it was, the higher the positive rate was. After 96 hours there was bacterium colonization in vein catheter（10%） and after 120 hours positive rate was obviously higher（40%）. CONCLUSIONS After using peripheral vein catheter for 96 hours in summer season, there is bacterium colonization in catheter, increasing the risk for infection, so the optimal time duration of using peripheral vein catheter in summer is 72-96 hours.