目的 探讨实时反馈技术对改善穿戴个人三级防护装备下施救者胸外按压质量的影响。 方法 采用便利 抽样法选取20名急救科医护人员为受试者，采用自身前后对照试验，穿戴个人三级防护装备的受试者先在心肺复苏模拟人上进行无反馈提示的常规胸外按压（常规按压组），充分休息后，进行反馈提示下的胸外按压（反馈按压组）， 语音提示按压频率及按压深度是否达标。 观察并记录胸外按压质量，以及两组受试者胸外按压操作前后的生理指标数据（包括心率、收缩压、舒张压、经皮血氧饱和度）。 结果 受试者常规按压组按压频率为每分钟（133±12）次，高于 反馈按压组（113±5）次，两组比较，差异具有统计学意义（P=0.001）；常规按压组按压深度（4.5±1.0） cm，浅于反馈按压组 （5.8±0.8） cm，两组比较，差异具有统计学意义（P=0.027）；常规按压组的综合达标率仅为6.2%，明显低于反馈按压组 的91%，两组比较，差异具有统计学意义（P=0.001）。 两组胸外按压操作前后受试者的生理指标数据变化差异均无统计学意义（P>0.05）。 结论 实时反馈技术能有效改善穿戴个人三级防护装备下施救者的胸外按压质量，且对施救者的生理指标无影响。

Objective To explore the effect of real-time feedback technology on improving the quality of external chest compression of rescuers wearing personal tertiary protective equipment. Methods Twenty medical staff in emergency department were selected as subjects by convenience sampling method. A pre-post self comparison design was used. Subjects wearing tertiary personal protective equipment first performed routine chest compressions without feedback on a cardiopulmonary resuscitation（CPR） simulator(the routine compression group). After full rest， external chest compressions under feedback were performed(the feedback compression group). The quality of external chest compressions and physiological indicators（including heart rate，systolic blood pressure，diastolic blood pressure， and blood oxygen saturation） before and after external chest compressions in the two groups were observed and recorded. Results The compression frequency of subjects in the routine compression group was （133±12） times per minute，which was higher than that in the feedback compression group （113 ±5），and the difference was statistically significant （P=0.001）. The pressing depth of the routine compression group was （4.5±1.0） cm，which was shallower than that of the feedback compression group （5.8 ±0.8） cm，and the difference was statistically significant （P=0.027）. The comprehensive compliance rate of the routine compression group was only 6.2%，which was significantly lower than 91% in the feedback compression group，and the difference between the two groups was statistically significant（P=0.001）. There was no significant difference in the physiological index data between the two groups before and after chest compression （P>0.05）. Conclusion Real-time feedback technology can effectively improve the quality of external chest compression of rescuers wearing personal three-level protection equipment and has no effect on the physiological indicators of rescuers.