目的 分析外科手术部位感染率过低的原因，掌握手术部位感染诊断标准，减少医院感染漏报，及时发现医院感染流行趋势，采取控制措施，防止医院感染暴发。 方法 选择开展较多、手术部位一旦发生感染对患者安全威胁性较大的手术：包括胆囊切除或（和）胆管手术，结肠、直肠切除术，阑尾切除术，疝手术，乳房切除术，剖宫产，子宫切除术及附件切除术，全髋关节置换术，食道贲门手术，腰椎间盘摘除术，监测时间为2011年1月1日－6月30日及2012年1月1日－6月30日，共监测1 180例手术，对手术部位感染率进行对比分析。 结果 2011年半年监测手术部位感染率1.99%，调整感染率4.74%；比国内报道低6～9倍；通过分析原因，对医院感染诊断标准再培训、加强病原微生物送检等，2012年半年监测手术部位感染率4.68%，调整感染率32.12%；与2011年比较差异有统计学意义（χ2=141.841，P=0.000）。 结论 手术部位感染率偏低的原因是医生漏报所致；采取整改措施后，提高了手术部位感染的识别能力，减少了漏报，对及时发现医院感染暴发具有重要意义。
Objective To analyze the main reason of prolonged latency phase and the impact of prolonged latency phase on the delivery style. Methods The pregnant women with prolonged latency phase (n=92) and normal pregnant women (n=100) were retrospectively analyzed in the maternity department of the second affiliated hospital of Kunming medical college in 2007. Results There was no significant difference in the pelvis and fetal-pelvis in the two groups. The number of the pregnant women with fetal body weight (gt;4 000 g) in the prolonged latency phase group was obviously larger than that in the normal pregnant women group, with the significant difference. As to the situation of fetal position, there were more occipitoanterior positions and fewer occipitoposterior as well as occipitotransterse positions in the prolonged latency phase group (Plt;0.01). In the prolonged latency phase group, the pregnant women with normal delivery were fewer and the uterine-incision deliveries were more than those in the normal group, with the significant difference. Conclusion The prolonged latency phase prognosticates the incidence of dystocia. We should decide if the pregnant women have the tendency of prolonged latency phase before delivery and deal with it in time so as to prevent the occurrence of dystocia.