Table 2 Blood gas parameters in coccygeal vein of dairy cows under varying heat stress
From: Heat stress affects dairy cow health status through blood oxygen availability
Item1 | Heat stress | SEM | P-value | ||||
|---|---|---|---|---|---|---|---|
No | Mild | Moderate | Treat | Linear | Quadratic | ||
iCa2+, mmol/L | 1.20b | 1.93a | 1.21b | 0.06 |  < 0.01 | 0.91 |  < 0.01 |
Na+, mmol/L | 136b | 134c | 138a | 0.36 |  < 0.01 |  < 0.01 |  < 0.01 |
K+, mmol/L | 4.46a | 4.09b | 4.14b | 0.06 |  < 0.01 |  < 0.01 |  < 0.01 |
pO2, mmHg | 33.7 | 40.1 | 37.2 | 3.70 | 0.48 | 0.50 | 0.32 |
sO2, % | 64.3 | 68.8 | 66.3 | 2.75 | 0.48 | 0.59 | 0.28 |
Total CO2, mmol/L | 30.7a | 31.0a | 27.2b | 0.54 |  < 0.01 |  < 0.01 |  < 0.01 |
pCO2, mmHg | 46.0 | 43.3 | 44.2 | 1.84 | 0.52 | 0.45 | 0.39 |
HCO3−, mmol/L | 29.3 | 28.0 | 25.8 | 1.08 | 0.07 | 0.02 | 0.72 |
BEecf, mmol/L | 4.61a | 5.33a | 0.56b | 0.56 |  < 0.01 |  < 0.01 |  < 0.01 |
pH | 7.41a | 7.42a | 7.38b | 0.01 |  < 0.01 |  < 0.01 |  < 0.01 |