CONTINUOUS MEASUREMENT OF CARDIAC-OUTPUT DURING AORTIC CROSS-CLAMPING BY THE ESOPHAGEAL DOPPLER MONITOR ODM-1

We have compared the Doppler against the thermodilution technique far measurement of cardiac output in six patients during aortic surgery. The correlation coefficient between the two methods was between 0.76 and 0.84 during the different periods of the operation. Using the integral nomogram instead of direct calibration, the Doppler system underestimated cardiac output in atherosclerotic patients. However, the Doppler consent. Patients were excluded if they had known method did register accurately significant changes cardiac valve defects or any history of oesophageal in cardiac output.