Affordable Access

Continuous determination of cardiac output using a flow-directed Doppler pulmonary artery catheter.

Authors
  • Segal, J
  • Gaudiani, V
  • Nishimura, T
Type
Published Article
Journal
Journal of Cardiothoracic and Vascular Anesthesia
Publisher
Elsevier
Publication Date
Aug 01, 1991
Volume
5
Issue
4
Pages
309–315
Identifiers
PMID: 1831393
Source
Medline
License
Unknown

Abstract

A newly developed, flow-directed, Doppler pulmonary artery catheter that uses multiple ultrasonic transducers to measure instantaneous and continuous cardiac output was evaluated in 20 patients undergoing cardiac and vascular surgical procedures. Cardiac output was determined using the product of the average velocity and the area of the main pulmonary artery. Pulmonary artery area was obtained from measurements of diameter via ultrasound transit time, and average velocity of blood flow was determined from the Doppler shift frequency. Two hundred thirty-eight simultaneous Doppler catheter and thermodilution cardiac output measurements were obtained preoperatively, intraoperatively, and during postoperative recovery. Catheter indwelling time varied from 18 through 94 hours (mean +/- SD, 40 +/- 19 hours) with 2 to 26 (mean +/- SD, 12 +/- 6) sets of triplicate cardiac output measurements obtained per patient. Doppler catheter cardiac output correlated well with thermodilution (r = 0.76, slope or m = 0.87, and SEE = 0.05 with P = 0.0001) and mean predictive error (bias) appeared clinically insignificant (bias +/- SD, -0.13 +/- 0.79 L/min). Accurate, continuous monitoring of instantaneous and mean cardiac output appears possible with use of this Doppler pulmonary artery catheter system.

Report this publication

Statistics

Seen <100 times