title: Noninvasive measurement of cardiac output in hemodialysis patients by task force monitor: a comparison with the Transonic System.
abstract: Cardiovascular disease is the leading cause of morbidity and mortality in maintenance hemodialysis (MHD) patients. The Transonic (TRS; Transonic Systems, Ithaca, NY) device is frequently used for determination of cardiac output (CO) by an indicator dilution technique. The Task Force Monitor (TFM; CN Systems, Graz, Austria) has gained attention as noninvasive tool for continuous beat-to-beat assessment of cardiovascular variables, including CO by impedance cardiography. Despite its use in cardiology and intensive care settings, the TFM has yet not been validated in dialysis patients. This study compares CO measurements in 12 MHD patients by TFM and TRS. Bland-Altman and regression analysis were used. CO was measured simultaneously by TRS and TFM. Average CO was 5.4 L/min by TRS and 5.0 L/min by TFM, respectively. Bland-Altman analysis revealed no significant systematic differences between the two methods (mean difference: 0.4 L/min; SD: 0.6; p > 0.05). Linear regression analysis showed significant correlation between both techniques (r = 0.802, p = 0.002). The SD of mean individual CO values was 1.1 L/min with TRS and 0.8 L/min with TFM, respectively.CO measured by TFM and TRS does not differ significantly, thus making the TFM an attractive noninvasive tool for the continuous beat-to-beat assessment of CO in MHD patients.
authors: Renal Research Institute, New York, NY 10128, USA.
authors: Thomas M
authors: TM
authors: Kitzler
authors: Olga
authors: O
authors: Sergeyeva
authors: Alice
authors: A
authors: Morris
authors: Falko
authors: F
authors: Skrabal
authors: Peter
authors: P
authors: Kotanko
authors: Nathan W
authors: NW
authors: Levin
mesh_terms: D000328:Adult; D000368:Aged; D002248:Carbon Monoxide / Q000097:blood*; D002302:Cardiac Output; D002307:Cardiography, Impedance; D015331:Cohort Studies; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D019060:Minimally Invasive Surgical Procedures; D006435:Renal Dialysis; D015203:Reproducibility of Results; D013815:Thermodilution
chemical_list: D002248:Carbon Monoxide