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Comparison of cardiac output measurement by continuous thermodilution with electromagnetometry in adult cardiac surgical patients.

Abstract：

:A pulmonary artery catheter (PAC) capable of continuous cardiac output (CCO) determination by thermodilution has recently been introduced. The purpose of this study was to compare CCO with two other methods of cardiac output (Ot) determination: electromagnetometry (EM) and standard bolus thermodilution cardiac output (BCO). Following median sternotomy and pericardiotomy, an EM ring probe was placed around the ascending aorta in 25 adult cardiac surgical patients and connected to an EM flowmeter interfaced with a calibrated strip recorder. Measurements were obtained over a 15- to 20-minute interval during a period of stable EM-determined Ot prior to initiation of cardiopulmonary bypass and in the absence of surgical stimulation. The CCO system averages Ot over a 3-minute interval, updating the measurement every 30 seconds. Cardiac output determined by the CCO system was compared with EM Ot averaged from the prior 3-minute period and with BCO obtained immediately after changing the Ot monitor from the continuous to bolus mode. Compared with EM, the bias for CCO was -0.48 L/min, precision 0.56 L/min, and the limits of agreement 1.12 L/min. Bias, precision, and limits of agreement of CCO compared with BCO were 0.41, 0.82, 1.64 L/min, respectively. Correlation between EM and CCO was r = 0.80 and between CCO and BCO r = 0.64. Cardiac output determined by CCO was within 10% of the EM determination for 37 measurements, between 10% and 20% for 17, and greater than 20% for 7 measurements.(ABSTRACT TRUNCATED AT 250 WORDS)

journal_name

J Cardiothorac Vasc Anesth

journal_title

Journal of cardiothoracic and vascular anesthesia

authors

Hogue CW Jr,Rosenbloom M,McCawley C,Lappas DG

doi

10.1016/1053-0770(94)90193-7

subject

Has Abstract

pub_date

1994-12-01 00:00:00

pages

631-5

issue

6

eissn

1053-0770

issn

1532-8422

pii

1053-0770(94)90193-7

journal_volume

8

pub_type

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