A noninvasive method for estimating cardiac output using lung to finger circulation time of oxygen

• Published in: The American journal of cardiology Vol. 82; no. 7; pp. 915 - 917
• Main Authors: Kasravi, Babak, Boehmer, John P., Leuenberger, Urs A.
• Format: Journal Article
• Language: English
• Published: New York, NY Elsevier Inc 01-10-1998; Elsevier; Elsevier Limited
• Subjects: Biological and medical sciences; Cardiac Catheterization; Cardiac Output; Cardiology; Cardiovascular system; Female; Heart; Heart Diseases - physiopathology; Humans; Investigative techniques of hemodynamics; Investigative techniques, diagnostic techniques (general aspects); Male; Medical sciences; Middle Aged; Oximetry; Oxygen; Oxygen - blood; Prospective Studies; Thermodilution; Heart; Human; Oxygen; Pulse oxymetry; Lung; Finger; Gas saturation; Exploration; Technique; Circulation time; Blood flow
• ISSN: 0002-9149; 1879-1913
• DOI: 10.1016/S0002-9149(98)00505-0

To develop a safe, noninvasive, simple, inexpensive, and clinically adaptable method for estimating cardiac output, we evaluated the potential of lung to finger circulation time (LFCT) and buildup time (Tb) of oxygen as measured by pulse oximetry to estimate cardiac output. Significant correlation was found between cardiac output as measured by thermodilution and the inverse of LFCT (R = 0.76, p < 0.001, SEE = 0.9 L/min) as well as the inverse of Tb (R = 0.72, p < 0.001, SEE = 0.9 L/min).