Arterial and mixed venous blood gases following DNP infusions in rabbits

1977 ◽  
Vol 33 (6) ◽  
pp. 742-743
Author(s):  
P. Grieb
Keyword(s):  
Venous Blood ◽  
Blood Gases ◽  
Mixed Venous Blood ◽  
Mixed Venous

Changes in blood gases and acid-base balance in the exercising dog

1962 ◽  
Vol 17 (4) ◽  
pp. 656-660 ◽  
Author(s):  
Ronald L. Wathen ◽  
Howard H. Rostorfer ◽  
Sid Robinson ◽  
Jerry L. Newton ◽  
Michael D. Bailie
Keyword(s):  
Venous Blood ◽  
Blood Gases ◽  
Respiratory Alkalosis ◽  
Hydrogen Ion ◽  
Ion Concentration ◽  
Mixed Venous Blood ◽  
Acid Base Balance ◽  
Hydrogen Ion Concentration ◽  
Arterial Blood ◽  
Mixed Venous

Effects of varying rates of treadmill work on blood gases and hydrogen ion concentrations of four healthy young dogs were determined by analyses of blood for O2 and CO2 contents, Po2, Pco2, and pH. Changes in these parameters were also observed during 30-min recovery periods from hard work. Arterial and mixed venous blood samples were obtained simultaneously during work through a polyethylene catheter in the right ventricle and an indwelling needle in an exteriorized carotid artery. Mixed venous O2 content, Po2 and O2 saturation fell with increased work, whereas arterial values showed little or no change. Mixed venous CO2 content, Pco2, and hydrogen ion concentration exhibited little change from resting levels in two dogs but increased significantly in two others during exercise. These values always decreased in the arterial blood during exercise, indicating the presence of respiratory alkalosis. On cessation of exercise, hyperventilation increased the degree of respiratory alkalosis, causing it to be reflected on the venous side of the circulation. Submitted on January 8, 1962

Mixed venous blood gases in recumbent and upright positions in foals from birth to 14 days of age

1992 ◽  
Vol 24 (5) ◽  
pp. 399-401 ◽  
Author(s):  
J. E. MADIGAN ◽  
W. P. THOMAS ◽  
KATHLEEN Q. BACKUS ◽  
W. E. POWELL
Keyword(s):  
Venous Blood ◽  
Blood Gases ◽  
Mixed Venous Blood ◽  
Mixed Venous

Dependence of Middle Ear Gas Composition on Pulmonary Ventilation

1997 ◽  
Vol 106 (4) ◽  
pp. 314-319 ◽  
Author(s):  
Haya Mover-Lev ◽  
Moshe Harell ◽  
Dalia Levy ◽  
Amos Ar ◽  
Michal Luntz ◽  
...  
Keyword(s):  
Steady State ◽  
Middle Ear ◽  
Pulmonary Ventilation ◽  
Venous Blood ◽  
Blood Gases ◽  
Mixed Venous Blood ◽  
Gas Composition ◽  
Blood Gas ◽  
Ventilation Perfusion Ratio ◽  
Mixed Venous

The middle ear (ME) steady state gas composition resembles that of mixed venous blood. We changed arterial and venous blood gases by artificially ventilating anesthetized guinea pigs and measured simultaneous ME gas changes during spontaneous breathing, hyperventilation, and hypoventilation. During hyperventilation, PaCO2 and PvCO2 (a = arterial, v = venous) decreased from 46.0 and 53.0 mm Hg to 17.9 and 37.5 mm Hg, respectively, while PaO2 and PvO2 (85.6 and 38.2 mm Hg) did not change. This was accompanied by an ME PCO2 decrease from 70.4 to 58.8 mm Hg and a PO2 decrease from 36.8 to 25.4 mm Hg. During hypoventilation, PaCO2 and PvCO2 increased to 56.8 and 66.4 mm Hg, while PvO2 decreased to 21.8 mm Hg. The ME PCO2 increased simultaneously to 88.8 mm Hg and the ME PO2 decreased to 25.4 mm Hg. The ME PO2 decrease during hyperventilation may be explained by a 33% decrease in ME mucosa perfusion, calculated from the ME ventilation-perfusion ratio. This study shows that ME gas composition follows fluctuations of blood gas levels and thus may affect total ME pressure.

Blood-gas measurements adjusted for temperature at three sites during incremental exercise in the horse

1998 ◽  
Vol 85 (3) ◽  
pp. 1030-1036 ◽  
Author(s):  
L. E. Taylor ◽  
D. S. Kronfeld ◽  
P. L. Ferrante ◽  
J. A. Wilson ◽  
W. Tiegs
Keyword(s):  
Time Course ◽  
Venous Blood ◽  
Muscle Metabolism ◽  
Blood Gases ◽  
Incremental Exercise ◽  
Strenuous Exercise ◽  
Mixed Venous Blood ◽  
Blood Gas ◽  
Gas Measurements ◽  
Mixed Venous

Rectal temperature (Tre) is often used to adjust measurements of blood gases, but these adjusted measurements may not approximate temperatures during intense exercise at main sites of gas exchange: muscle and lung. To evaluate differences in blood gases between sites, temperatures (T) were measured with thermocouples in the rectum (re), in mixed venous blood (v), in gluteal muscle (mu), and on the skin (sk) in seven Arabian horses as they underwent an incremental exercise test on a treadmill. Blood samples were drawn from the carotid artery and pulmonary artery (mixed venous) 30 s before each increase in speed and during recovery. Blood gases and pH were measured at 37°C, and all variables were adjusted to Tre,[Formula: see text], and Tmu. Adjusted variables during exercise and recovery were significantly different from each other at the three sites. Linear and polynomial equations described the time course of venous temperature and[Formula: see text] from Treand Tskduring exercise and from Tskduring recovery. Interpretation of changes in muscle metabolism and gas exchanges based on blood-gas measurements is improved if they are adjusted appropriately to Tmuor[Formula: see text], which may be predicted from Tskin addition to Treduring strenuous exercise and from Tskduring recovery.

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