调制中频电疗对开胸手术围手术期患者下肢静脉血液回流的影响

The effects of modulated medium frequency electrotherapy on lower extremity hemodynamics in perioperative thoracic surgery patients

目的 观察调制中频电疗对开胸手术围手术期患者下肢静脉的血流动力学的影响.方法 将符合入选标准的70例开胸术后72h内的患者分为观察组和对照组,每组35例.观察组在常规治疗与护理的基础上,利用中频电疗对下肢深静脉血流动力学进行干预;对照组采取常规治疗.观察2组患者的股总静脉、股深静脉、股浅静脉、胭静脉和胫前静脉在术前、术后4h、中频电疗治疗20min后即时、15min和30min的收缩期最大血流速度（Vmax）、舒张期最低血流速度（Vmin）和均时平均流速（TAVM）.结果 观察组各时间点的血流动力学比较,调制中频电疗治疗20min后即时的3个血流动力学参数与其他时间点的差异有统计学意义（P〈0.005）;对照组各时间点的血流动力学比较,差异无统计学意义（P〉0.05）.调制中频电疗治疗20min后即时观察组和对照组的血流动力学比较差异有统计学意义（P〈0.05）,其余时间点2组比较差异无统计学意义（P〉0.05）.结论 开胸手术患者可选择中频电疗对下肢静脉血流动力学进行干预,以达到预防下肢深静脉血栓的目的 .

Objective To evaluate the effects of modulated, medium frequency electrotherapy on hemodynamics after thoracic surgery to provide non-pharmacological measures for preventing deep vein thrombosis （DVT）.Methods Seventy thoracic surgery patients were divided into an experimental group and a control group. Both groups received conventional treatment and nursing. The experimental group （35 patients） was treated with modulated, medium frequency electrotherapy additionally while the control group （35 patients） was not. The vein systolic maximum velocity （Vmax）, vein diastolic minimum velocity （Vmin） and time-averaged mean velocity （TAVM） in the femoral vein, the superficial femoral vein, the deep femoral vein, the popliteal vein and the anterior tibial vein were observed before the operation, 4h after the operation, just after 20 minutes of electrotherapy, 15 min after the electrotherapy and 30 min after the electrotherapy. Results There were significant differences among the time points in the experimental group. There was no significant difference among the time points in the control group.There were significant differences in lower extremity hemodynamics between the experimental group and the control group at end of the electrotherapy session, but no significant differences at the later time points. Conclusions Modulated, medium frequency electrotherapy has a significant effect on lower extremity hemodynamics. It is an effective method for DVT prophylaxis in perioperative thoracic surgical patients.