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Pulse contour cardiac output derived from non‐invasive arterial pressure in cardiovascular disease
Author(s) -
Bogert L. W. J.,
Wesseling K. H.,
Schraa O.,
Van Lieshout E. J.,
De Mol B. A. J. M.,
Van Goudoever J.,
Westerhof B. E.,
Van Lieshout J. J.
Publication year - 2010
Publication title -
anaesthesia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.839
H-Index - 117
eISSN - 1365-2044
pISSN - 0003-2409
DOI - 10.1111/j.1365-2044.2010.06511.x
Subject(s) - medicine , cardiac output , supine position , blood pressure , mean arterial pressure , sitting , continuous noninvasive arterial pressure , cardiology , pulse pressure , hemodynamics , artery , anesthesia , pulse (music) , heart rate , pathology , detector , electrical engineering , engineering
Summary Pulse contour methods determine cardiac output semi‐invasively using standard arterial access. This study assessed whether cardiac output can be determined non‐invasively by replacing the intra‐arterial pressure input with a non‐invasive finger arterial pressure input in two methods, Nexfin CO‐trek ® and Modelflow ® , in 25 awake patients after coronary artery bypass surgery. Pulmonary artery thermodilution cardiac output served as a reference. In the supine position, the mean (SD) differences between thermodilution cardiac output and Nexfin CO‐trek were 0.22 (0.77) and 0.44 (0.81) l.min −1 , for intra‐arterial and non‐invasive pressures, respectively. For Modelflow, these differences were 0.70 (1.08) and 1.80 (1.59) l.min −1 , respectively. Similarly, in the sitting position, differences between thermodilution cardiac output and Nexfin CO‐trek were 0.16 (0.78) and 0.34 (0.83), for intra‐arterial and non‐invasive arterial pressure, respectively. For Modelflow, these differences were 0.58 (1.11) and 1.52 (1.54) l.min −1 , respectively. Thus, Nexfin CO‐trek readings were not different from thermodilution cardiac output, for both invasive and non‐invasive inputs. However, Modelflow readings differed greatly from thermodilution when using non‐invasive arterial pressure input.