Validation of bioimpedance estimates of cardiac output in preeclampsia

被引:16
作者
Scardo, JA
Ellings, J
Vermillion, ST
Chauhan, SP
机构
[1] Spartanburg Reg Med Ctr, Spartanburg, SC 29303 USA
[2] Med Univ S Carolina, Charleston, SC 29425 USA
关键词
preeclampsia; hemodynamic monitoring; cardiac output;
D O I
10.1067/mob.2000.108892
中图分类号
R71 [妇产科学];
学科分类号
100211 ;
摘要
OBJECTIVE: We sought to evaluate the capacity of a new thoracic electric bioimpedance system to estimate cardiac output in patients with preeclampsia. STUDY DESIGN: We performed a prospective comparison of thoracic electric bioimpedance and echocardiographic M-mode volumetric estimates of cardiac output (in liters per minute) in preeclampsia. Subjects with preeclampsia who were chosen by means of strict criteria (either a systolic blood pressure greater than or equal to 140 mm Hg or a diastolic blood pressure 90 mm Hg, or both, and proteinuria greater than or equal to 300 mg in 24 hours or greater than or equal to +1 on repeat dipstick measurement 6 hours apart) were asked to participate in an institutional review board-approved study. Thoracic electric bioimpedance and echocardiography were performed with the patients in the left lateral recumbent position. Thoracic electric bioimpedance estimates were recorded at bedside; investigators were blinded to 3 simultaneously obtained echocardiographic M-mode estimates of cardiac output. Means were entered as the estimate for each patient. To satisfy the assumption of independent samples, only 1 estimate from each technique was used for each patient. Data were analyzed by Bland-Altman comparison. Hemodynamic and demographic variables are presented as mean +/- SD. RESULTS: Fifteen patients were enrolled. Mean maternal age was 25.9 +/- 4.8 years, and mean gestational age was 34.0 +/- 3.5 weeks. Mean arterial pressure was 112 +/- 14 mm Hg. There was good agreement of thoracic electric bioimpedance-derived and M-mode-derived cardiac output estimates. CONCLUSIONS: In patients with preeclampsia, thoracic electric bioimpedance estimates of cardiac output compare well with echocardiographic M-mode estimates.
引用
收藏
页码:911 / 913
页数:3
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