Korean J Anesthesiol.  2002 Jul;43(1):15-19. 10.4097/kjae.2002.43.1.15.

A Comparison of the Transoesophageal Doppler and Thermodilution Techniques for Cardiac Output Measurement in Off-Pump Coronary Artery Bypass Surgery Patients

• Yoon TG
• Yun WH
• Ham BM
• Kim YL

• KMID: 1936028
• DOI: http://doi.org/10.4097/kjae.2002.43.1.15

Abstract

BACKGROUND: The aim of this study was to compare the accuracy of measured cardiac output using the newly developed esophageal doppler device with that of the thermodilution method using a pulmonary artery catheter.
METHODS
In 15 patients undergoing off-pump coronary artery bypass surgery, cardiac outputs were measured at four episodes of surgery; (1) after induction of anesthesia, (2) during dissection of the internal mammary artery, (3) during anastomosis of the left anterior descending artery, and (4) after closure of the pericardium.
RESULTS
The bias between the two methods was 0.52 +/- 1.09 L/min. Analysis of the changes in cardiac output from sample episode 1 to 2, from sample episode 2 to 3 and from sample episode 3 to 4, expressed as percent change values, shows no significant differences between the two methods (P > 0.05).
CONCLUSIONS
The esophageal doppler accurately reflects changes in cardiac output with time when compared with that of the thermodilution.

Keyword

Cardiac output; esophageal doppler; monitoring; off-pump coronary artery bypass graft; thermodilution

MeSH Terms

Anesthesia
Arteries
Bias (Epidemiology)
Cardiac Output*
Catheters
Coronary Artery Bypass, Off-Pump*
Humans
Mammary Arteries
Pericardium
Pulmonary Artery
Thermodilution*
Thoracic Surgery