Effects of ventilation on cardiac output determined by inert gas rebreathing.

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Effects of ventilation on cardiac output determined by inert gas rebreathing. / Damgaard, Morten; Norsk, Peter.

In: Clinical Physiology and Functional Imaging, Vol. 25, No. 3, 2005, p. 142-7.

Research output: Contribution to journal › Journal article › Research › peer-review

Harvard

Damgaard, M & Norsk, P 2005, 'Effects of ventilation on cardiac output determined by inert gas rebreathing.', Clinical Physiology and Functional Imaging, vol. 25, no. 3, pp. 142-7. https://doi.org/10.1111/j.1475-097X.2005.00602.x

APA

Damgaard, M., & Norsk, P. (2005). Effects of ventilation on cardiac output determined by inert gas rebreathing. Clinical Physiology and Functional Imaging, 25(3), 142-7. https://doi.org/10.1111/j.1475-097X.2005.00602.x

Vancouver

Damgaard M, Norsk P. Effects of ventilation on cardiac output determined by inert gas rebreathing. Clinical Physiology and Functional Imaging. 2005;25(3):142-7. https://doi.org/10.1111/j.1475-097X.2005.00602.x

Author

Damgaard, Morten ; Norsk, Peter. / Effects of ventilation on cardiac output determined by inert gas rebreathing. In: Clinical Physiology and Functional Imaging. 2005 ; Vol. 25, No. 3. pp. 142-7.

Bibtex

@article{7ccc41d0acd711ddb538000ea68e967b,
title = "Effects of ventilation on cardiac output determined by inert gas rebreathing.",
abstract = "One of the most important methodological problems of the foreign gas rebreathing technique is that outcome of the measurements depends on procedural variables such as rebreathing frequency (RF), rebreathing bag volume (V(reb)), lung volume at start of rebreathing and intervals between measurements. Therefore, in 10 healthy males we investigated the effects of changes in ventilation pattern on cardiac output (CO) estimated by an N(2)O-rebreathing technique. Reducing the rebreathing volume (V(reb)) from 1.5 to 1.0 l diminished CO by 0.5 +/- 0.2 l min(-1), whereas an increase in V(reb) from 1.5 to 2.5 l had no effects. CO was 1.0 +/- 0.2 l min(-1) higher when, rebreathing was performed after a forced expiration than following a normal tidal expiration. Serial determinations of CO required a 3-min interval between the measurements to avoid effects of recirculation of N(2)O. Changing RF from 15 to 30 breaths min(-1) or adding serial dead space by up to 600 ml did not affect the determination of CO. In conclusion, the rebreathing procedure for determination of CO at rest should be performed following a normal tidal expiration with a rebreathing bag volume of between 1.5 and 2.5 l and with manoeuvres separated by at least 3-5 min. Variations in RF within the physiological range from 15 to 30 breaths min(-1) do not affect outcome of the measurements.",
author = "Morten Damgaard and Peter Norsk",
note = "Keywords: Adult; Analysis of Variance; Carbon Monoxide; Cardiac Output; Humans; Male; Nitrous Oxide; Positive-Pressure Respiration",
year = "2005",
doi = "10.1111/j.1475-097X.2005.00602.x",
language = "English",
volume = "25",
pages = "142--7",
journal = "Clinical Physiology and Functional Imaging",
issn = "1475-0961",
publisher = "Wiley-Blackwell",
number = "3",

}

RIS

TY - JOUR

T1 - Effects of ventilation on cardiac output determined by inert gas rebreathing.

AU - Damgaard, Morten

AU - Norsk, Peter

N1 - Keywords: Adult; Analysis of Variance; Carbon Monoxide; Cardiac Output; Humans; Male; Nitrous Oxide; Positive-Pressure Respiration

PY - 2005

Y1 - 2005

N2 - One of the most important methodological problems of the foreign gas rebreathing technique is that outcome of the measurements depends on procedural variables such as rebreathing frequency (RF), rebreathing bag volume (V(reb)), lung volume at start of rebreathing and intervals between measurements. Therefore, in 10 healthy males we investigated the effects of changes in ventilation pattern on cardiac output (CO) estimated by an N(2)O-rebreathing technique. Reducing the rebreathing volume (V(reb)) from 1.5 to 1.0 l diminished CO by 0.5 +/- 0.2 l min(-1), whereas an increase in V(reb) from 1.5 to 2.5 l had no effects. CO was 1.0 +/- 0.2 l min(-1) higher when, rebreathing was performed after a forced expiration than following a normal tidal expiration. Serial determinations of CO required a 3-min interval between the measurements to avoid effects of recirculation of N(2)O. Changing RF from 15 to 30 breaths min(-1) or adding serial dead space by up to 600 ml did not affect the determination of CO. In conclusion, the rebreathing procedure for determination of CO at rest should be performed following a normal tidal expiration with a rebreathing bag volume of between 1.5 and 2.5 l and with manoeuvres separated by at least 3-5 min. Variations in RF within the physiological range from 15 to 30 breaths min(-1) do not affect outcome of the measurements.

AB - One of the most important methodological problems of the foreign gas rebreathing technique is that outcome of the measurements depends on procedural variables such as rebreathing frequency (RF), rebreathing bag volume (V(reb)), lung volume at start of rebreathing and intervals between measurements. Therefore, in 10 healthy males we investigated the effects of changes in ventilation pattern on cardiac output (CO) estimated by an N(2)O-rebreathing technique. Reducing the rebreathing volume (V(reb)) from 1.5 to 1.0 l diminished CO by 0.5 +/- 0.2 l min(-1), whereas an increase in V(reb) from 1.5 to 2.5 l had no effects. CO was 1.0 +/- 0.2 l min(-1) higher when, rebreathing was performed after a forced expiration than following a normal tidal expiration. Serial determinations of CO required a 3-min interval between the measurements to avoid effects of recirculation of N(2)O. Changing RF from 15 to 30 breaths min(-1) or adding serial dead space by up to 600 ml did not affect the determination of CO. In conclusion, the rebreathing procedure for determination of CO at rest should be performed following a normal tidal expiration with a rebreathing bag volume of between 1.5 and 2.5 l and with manoeuvres separated by at least 3-5 min. Variations in RF within the physiological range from 15 to 30 breaths min(-1) do not affect outcome of the measurements.

U2 - 10.1111/j.1475-097X.2005.00602.x

DO - 10.1111/j.1475-097X.2005.00602.x

M3 - Journal article

C2 - 15888093

VL - 25

SP - 142

EP - 147

JO - Clinical Physiology and Functional Imaging

JF - Clinical Physiology and Functional Imaging

SN - 1475-0961

IS - 3

ER -

ID: 8466308