Term
| The presence of hemoglobin in the normal arterial blood increases its oxygen concentration approximately by how many times? Assume that hemoglobin content is 15g/dl. |
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Definition
1.34 x 15 x .974 = 19.5 vol % + 0.3 = 19.8%
Approx 20/0.3 - 70 times |
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Term
| If a patient has a HB level of 14g/100ml blood and a PaO2 of 55mmHg (85% saturated with oxygen) approximately how much oxygen is present in every 100ml of arterial blood? |
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Definition
o2 content - 1.34 x 14 x 0.85 - 15.9 vol %
Plus .15 - 16% |
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Term
| What is the PO2 for arterial blood by definition? |
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Definition
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Term
| What is hemoglobin's purpose? |
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Definition
| to act as a buffer for oxygen |
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Term
| If you went to the Rocky Mountains and your arterial blood has a partial pressure of 60 mmHg, what would be your percent saturation of Hb and volume percent of oxygen? Is this a significant change? |
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Definition
% sat Hb = 89%
vol % O2 = 18%
No; the buffer quality of hemoglobin keeps vol % O2 from dropping significantly |
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Term
| You are breathing pure O2 and the PO2 of your arterial circulation is 600 mmHg. What is the % sat of your Hb, assuming that normal Hb is 97% saturated? Is this a significant change |
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Definition
21 vol %
No; normal blood is 19.8 vol % 02 |
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Term
What is P50?
What is its normal value? |
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Definition
The partial pressure of oxygen when Hb is 50% saturated.
Normal P50 = PaO2 = about 26 mmHg |
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Term
What is P50?
What is its normal value? |
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Definition
The partial pressure of oxygen when Hb is 50% saturated.
Normal P50 = PaO2 = about 26 mmHg |
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Term
When P50 increases, to which direction does the HbO2 curve shift?
What happens when P50 decreases? |
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Definition
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