Non-invasive assessment of cardiac output during mechanical ventilation – a novel approach using an inert gas rebreathing method

2011 ◽  
Vol 56 (3) ◽  
pp. 147-151
Author(s):  
Werner Nickl ◽  
Till Bugaj ◽  
Thomas Mondritzki ◽  
Kathrin Kuhlebrock ◽  
Winfried Dinh ◽  
...  
Keyword(s):  
Mechanical Ventilation ◽  
Cardiac Output ◽  
Inert Gas ◽  
Non Invasive ◽  
Inert Gas Rebreathing ◽  
Novel Approach ◽  
Rebreathing Method

Reproducibility of Inert Gas Rebreathing Method to Estimate Cardiac Output at Rest and During Cardiopulmonary Exercise Stress Testing

2019 ◽  
Vol 40 (02) ◽  
pp. 125-132 ◽  
Author(s):  
Nduka Okwose ◽  
Jie Zhang ◽  
Shakir Chowdhury ◽  
David Houghton ◽  
Srdjan Ninkovic ◽  
...  
Keyword(s):  
Cardiac Output ◽  
Exercise Testing ◽  
Coefficient Of Variation ◽  
Cardiopulmonary Exercise Testing ◽  
Exercise Stress ◽  
Inert Gas ◽  
Peak Exercise ◽  
Cardiopulmonary Exercise ◽  
Inert Gas Rebreathing ◽  
Rebreathing Method

AbstractThe present study evaluated reproducibility of the inert gas rebreathing method to estimate cardiac output at rest and during cardiopulmonary exercise testing. Thirteen healthy subjects (10 males, 3 females, ages 23–32 years) performed maximal graded cardiopulmonary exercise stress test using a cycle ergometer on 2 occasions (Test 1 and Test 2). Participants cycled at 30-watts/3-min increments until peak exercise. Hemodynamic variables were assessed at rest and during different exercise intensities (i. e., 60, 120, 150, 180 watts) using an inert gas rebreathing technique. Cardiac output and stroke volume were not significantly different between the 2 tests at rest 7.4 (1.6) vs. 7.1 (1.2) liters min−1, p=0.54; 114 (28) vs. 108 (15) ml beat−1, p=0.63) and all stages of exercise. There was a significant positive relationship between Test 1 and Test 2 cardiac outputs when data obtained at rest and during exercise were combined (r=0.95, p<0.01 with coefficient of variation of 6.0%), at rest (r=0.90, p<0.01 with coefficient of variation of 5.1%), and during exercise (r=0.89, p<0.01 with coefficient of variation 3.3%). The mean difference and upper and lower limits of agreement between repeated measures of cardiac output at rest and peak exercise were 0.4 (−1.1 to 1.8) liter min−1 and 0.5 (−2.3 to 3.3) liter min−1, respectively. The inert gas rebreathing method demonstrates an acceptable level of test-retest reproducibility for estimating cardiac output at rest and during cardiopulmonary exercise testing at higher metabolic demands.

scholarly journals Interest of cardiac output (CO) measurement by Inert-Gas-Rebreathing method (IGR) in cardiac rehabilitation

2011 ◽  
Vol 54 ◽  
pp. e154-e155
Author(s):  
O. Troisgros ◽  
V. Gremeaux ◽  
C. Touzery ◽  
M. Zeller ◽  
L. Dufour ◽  
...  
Keyword(s):  
Cardiac Output ◽  
Cardiac Rehabilitation ◽  
Inert Gas ◽  
Inert Gas Rebreathing ◽  
Rebreathing Method

Noninvasive Cardiac Output Determination for Children by the Inert Gas-Rebreathing Method

2010 ◽  
Vol 31 (8) ◽  
pp. 1214-1218 ◽  
Author(s):  
Gesa Wiegand ◽  
Gunter Kerst ◽  
Winfried Baden ◽  
Michael Hofbeck
Keyword(s):  
Cardiac Output ◽  
Inert Gas ◽  
Inert Gas Rebreathing ◽  
Noninvasive Cardiac Output ◽  
Cardiac Output Determination ◽  
Rebreathing Method

Non-invasive determination of cardiac output: Comparison of a novel CW Doppler ultrasonic technique and inert gas rebreathing

2009 ◽  
Vol 136 (2) ◽  
pp. 248-250 ◽  
Author(s):  
Joachim Saur ◽  
Frederik Trinkmann ◽  
Jörg Weissmann ◽  
Martin Borggrefe ◽  
Jens J. Kaden
Keyword(s):  
Cardiac Output ◽  
Inert Gas ◽  
Ultrasonic Technique ◽  
Non Invasive ◽  
Inert Gas Rebreathing

The Impact of Pulmonary Disease on Noninvasive Measurement of Cardiac Output by the Inert Gas Rebreathing Method

Lung ◽  
2010 ◽  
Vol 188 (5) ◽  
pp. 433-440 ◽  
Author(s):  
Joachim Saur ◽  
Frederik Trinkmann ◽  
Christina Doesch ◽  
Armin Scherhag ◽  
Joachim Brade ◽  
...  
Keyword(s):  
Cardiac Output ◽  
Pulmonary Disease ◽  
Noninvasive Measurement ◽  
Inert Gas ◽  
Inert Gas Rebreathing ◽  
The Impact ◽  
Rebreathing Method
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