Comparison of pulmonary artery and transpulmonary thermodilution cardiac output measurements in unsedated newborn calves

2015 ◽  
Vol 42 (6) ◽  
pp. 614-622 ◽  
Author(s):  
Annette PN Kutter ◽  
Rahel S Jud Schefer ◽  
Barbara Bircher ◽  
Uli Bleul ◽  
Regula Bettschart-Wolfensberger
Keyword(s):  
Cardiac Output ◽  
Pulmonary Artery ◽  
Transpulmonary Thermodilution ◽  
Thermodilution Cardiac Output ◽  
Newborn Calves ◽  
Cardiac Output Measurements

Theoretical and model analysis of the unreliability of cardiac output measurement by means of the thermodilution method

2011 ◽  
Vol 59 (4) ◽  
pp. 435-439 ◽  
Author(s):  
M. Gawlikowski ◽  
T. Pustelny ◽  
B. Przywara-Chowaniec ◽  
J. Nowak-Gawlikowska
Keyword(s):  
Cardiac Output ◽  
Pulmonary Artery ◽  
Salt Solution ◽  
Model Analysis ◽  
Cardiac Output Measurement ◽  
Output Measurement ◽  
Thermodilution Cardiac Output ◽  
Thermal Indicator ◽  
Thermodilution Method ◽  
Cardiac Output Measurements

Theoretical and model analysis of the unreliability of cardiac output measurement by means of the thermodilution methodThermodilution is the clinically most often applied method of cardiac output measurements. This method is based on thermal indicator (iced isotonic salt solution) variation measurements by a Swan-Ganz catheter located inside the pulmonary artery. The unreliability of thermodilution should be estimated theoretically because of the lack of references. In this paper an attempt has been made to estimate theoretically the unreliability of thermodilution cardiac output measurements.

Injectate port selection affects accuracy and reproducibility of cardiac output measurements with multiport thermodilution pulmonary artery catheters

1994 ◽  
Vol 3 (1) ◽  
pp. 55-61 ◽  
Author(s):  
LE Renner ◽  
LT Meyer
Keyword(s):  
Cardiac Output ◽  
Pulmonary Artery ◽  
Inferior Vena Cava ◽  
Pulmonary Artery Catheter ◽  
Inferior Vena ◽  
Vena Cava ◽  
Thermodilution Cardiac Output ◽  
Electromagnetic Flow ◽  
Electromagnetic Flow Meter ◽  
Cardiac Output Measurements

OBJECTIVE: To compare the accuracy and reproducibility of thermodilution cardiac output measurements obtained from the injectate and infusion ports of a multilumen pulmonary artery catheter. The thermodilution results were compared with an independent measure of flow obtained from an electromagnetic flow meter. METHODS: In an experimental study conducted at an animal research laboratory of a health sciences university, two virgin western breed ewes were surgically instrumented with an inferior vena cava occluder, which reduced venous return and thus lowered cardiac output, and an ascending aortic electromagnetic flow probe, which provided an independent reference measure of cardiac output. On the day of study, a multilumen pulmonary artery catheter was inserted. Cardiac output was manipulated over a range of 2.9 to 12.1 L/min with i.v. isoproterenol or inferior vena cava occlusion. Approximately 30 simultaneous thermodilution and electromagnetic flow meter measurements of cardiac output were obtained from both the infusion and injectate ports in each of the two subjects. RESULTS: Correlation coefficients were lower and standard error of the estimates was higher for the infusion port (r = .83; SEE = 1.19 L/min) vs the injectate port (r = .94; SEE = .74 L/min), indicating reduced reproducibility with infusion port thermodilution cardiac output determinations. Accuracy was also adversely influenced in the infusion port results. The linear regression for the infusion port data intercepted the Y axis at +2.64 L/min, indicating significant overestimation of cardiac output at flows of less than 5 L/min and underestimation of flow when cardiac output exceeded 8 L/min. CONCLUSIONS: The use of the infusion port for the measurement of thermodilution cardiac output measurements may result in nonreproducible and inaccurate results.

Thermodilution cardiac output measurements by injection in pulmonary artery vs CVP catheter

1983 ◽  
Vol 11 (6) ◽  
pp. 460-461 ◽  
Author(s):  
C. MARTIN ◽  
P. SAUX ◽  
J. P AUFFRAY ◽  
V. FULACHIER ◽  
F SETBON ◽  
...  
Keyword(s):  
Cardiac Output ◽  
Pulmonary Artery ◽  
Thermodilution Cardiac Output ◽  
Cardiac Output Measurements
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