Bob was a reserve linebacker on the football team last year and is aggressively

Question

Bob was a reserve linebacker on the football team last year and is aggressively training to win a starting spot. He took a summer job at a resort near Leadville, CO at 10,000 feet where he was free to work out several hours a day. On return to Stephenville for the team physicals he finds his hematocrit is 47 and hemoglobin of 16.8 gm/dL.

1. What is Bob’s arterial oxygen content in _____ ml/dL? A. 15 B. 20 C. 22.5 D. 28 E. 40

2. What is Bob’s venous oxygen content in _____ml/dL.? A. 3.2. B. 5.0 C. 11.8. D. 15.0 E. 17.5

3. What is Bob’s arterial PO2 in ________mmHg? A. 40 B. 60 C. 100 D. 130 E. 150

4. What is Bob’s Venous PO2 in______ mmHg? A. 20. B. 30. C. 40. D. 50. E. 60.

Explanation / Answer

1.Arterial oxygen content (equation) =
(Hgb x 1.36 x SaO2) + (0.0031 x PaO2)

SaO2 = % of hemoglobin saturated with oxygen
Hgb = hemoglobin  
PaO2= Arterial oxygen partial pressure
CaO2: Directly reflects the total number of oxygen molecules in arterial blood hemoglobin

Substituting for the values,

arterial oxygen content is option B.20 ml/dL

Oxygen content of venous blood:

2.CvO2 = ( Hgb * 13.4 * O2vSat / 100 ) + ( PvO2 * 0.031 ). Ans:11.8

3.

arterial PO2=100mmHg

4.Venous PO2=30 mmHg

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