胸阻抗法检测心脏功能在心脏术后病人监护中的应用

A Comparative Investigation of Cardiac Function Measurement with Thoracic Impedance Trans-thoracic Echocardiography and Thermo-dilution Methods

目的:评价胸阻抗法测定心脏手术后心脏功能的可靠性和准确性。方法:随即选取西京医院心脏外科瓣膜置换和冠脉搭桥术后病人32例,其中男25例,女7例,冠心病病人19例,瓣膜病13例,平均年龄(55.2±12.3)岁,分别用胸阻抗法、经胸心脏B超法和心导管法测定病人心脏指数,作线性相关性分析。结果:3种方法测定的心指数结果无显著差异,具有良好的相关性,胸阻抗法与热稀释法的相关系数为0.84,胸阻抗法与心脏B超法的相关系数为0.81。结论:胸阻抗法无创心功能测定仪器具有操作简便,准确性高,可以连续检测观察病情变化的特点。

Objective To investigate the reliability and veracity of thoracic impedance in cardiac output measurement. Methods Thirty-two patients （male 25 cases, female 7 cases） with coronary artery disease （19 cases） and rheumatic heart disease （13 cases） were recruited in this study. The mean age of these patients was （55.2± 12.3） years. Their cardiac indices were measured with thoracic impedance, trans-thoracic echocardiography and thermo-dilution methods respectively. The statistical consistency of these three methods was evaluated. Results There is no significant difference between these three methods in the measurement of cardiac index in the situation of cardiovascular surgery ICU. The correlation co efficiency between thoracic impedance method and thermo-dilution method was 0.84, and it is 0.81 between thoracic impedance method and trans-thoracic echocardiography. Conclusion The reliability and veracity of thoracic impedance method is comparable to traditional thermo-dilution and echocardiography methods in cardiac index determination.