Abstract
This study assessed the degree to which correcting blood gas measurements to rectal temperature (T(re)) rather than to the temperatures at which gas exchange occurs [pulmonary arterial (T(pa)) or intramuscular (T(m))] introduces errors into blood gas analysis of exercising mammals. Horses and steers weighing 450 kg were run on a treadmill at speeds up to those eliciting maximal rates of O2 consumption (V̇O(2max)), and temperatures were measured in various body compartments. In both species T(pa) rose faster than T(re) during the run, the degree of dissociation being a function of exercise intensity and duration. T(m) was measured only in horses, and it rose faster than T(pa) during the run and decreased more slowly postrun. Correcting blood gas values measured at an analyzer temperature of 37°C to T(re) without accounting for transient increases during the run of T(pa) and T(m) that were never reflected in T(re) significantly biased estimates of blood gases. The biased estimates erroneously indicated that both species experienced more severe hypoxemia than they actually did at V̇O(2max) and masked the hypercapnia experienced by the horses at V̇O(2max).
| Original language | English (US) |
|---|---|
| Pages (from-to) | 879-884 |
| Number of pages | 6 |
| Journal | Journal of Applied Physiology |
| Volume | 67 |
| Issue number | 2 |
| State | Published - 1989 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Endocrinology
- Physiology
- Orthopedics and Sports Medicine
- Physical Therapy, Sports Therapy and Rehabilitation
Cite this
Blood gas measurements during exercise : Errors due to temperature correction. / Jones, James H; Taylor, C. R.; Lindholm, A.; Straub, R.; Longworth, K. E.; Karas, R. H.
In: Journal of Applied Physiology, Vol. 67, No. 2, 1989, p. 879-884.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Blood gas measurements during exercise
T2 - Errors due to temperature correction
AU - Jones, James H
AU - Taylor, C. R.
AU - Lindholm, A.
AU - Straub, R.
AU - Longworth, K. E.
AU - Karas, R. H.
PY - 1989
Y1 - 1989
N2 - This study assessed the degree to which correcting blood gas measurements to rectal temperature (T(re)) rather than to the temperatures at which gas exchange occurs [pulmonary arterial (T(pa)) or intramuscular (T(m))] introduces errors into blood gas analysis of exercising mammals. Horses and steers weighing 450 kg were run on a treadmill at speeds up to those eliciting maximal rates of O2 consumption (V̇O(2max)), and temperatures were measured in various body compartments. In both species T(pa) rose faster than T(re) during the run, the degree of dissociation being a function of exercise intensity and duration. T(m) was measured only in horses, and it rose faster than T(pa) during the run and decreased more slowly postrun. Correcting blood gas values measured at an analyzer temperature of 37°C to T(re) without accounting for transient increases during the run of T(pa) and T(m) that were never reflected in T(re) significantly biased estimates of blood gases. The biased estimates erroneously indicated that both species experienced more severe hypoxemia than they actually did at V̇O(2max) and masked the hypercapnia experienced by the horses at V̇O(2max).
AB - This study assessed the degree to which correcting blood gas measurements to rectal temperature (T(re)) rather than to the temperatures at which gas exchange occurs [pulmonary arterial (T(pa)) or intramuscular (T(m))] introduces errors into blood gas analysis of exercising mammals. Horses and steers weighing 450 kg were run on a treadmill at speeds up to those eliciting maximal rates of O2 consumption (V̇O(2max)), and temperatures were measured in various body compartments. In both species T(pa) rose faster than T(re) during the run, the degree of dissociation being a function of exercise intensity and duration. T(m) was measured only in horses, and it rose faster than T(pa) during the run and decreased more slowly postrun. Correcting blood gas values measured at an analyzer temperature of 37°C to T(re) without accounting for transient increases during the run of T(pa) and T(m) that were never reflected in T(re) significantly biased estimates of blood gases. The biased estimates erroneously indicated that both species experienced more severe hypoxemia than they actually did at V̇O(2max) and masked the hypercapnia experienced by the horses at V̇O(2max).
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UR - http://www.scopus.com/inward/citedby.url?scp=0024429260&partnerID=8YFLogxK
M3 - Article
C2 - 2793688
AN - SCOPUS:0024429260
VL - 67
SP - 879
EP - 884
JO - Journal of Applied Physiology
JF - Journal of Applied Physiology
SN - 8750-7587
IS - 2
ER -