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is the dissolved concentration of O2 in a normothermic patient, with a PaO2 of 90 mmHg?

Question

is the dissolved concentration of O2 in a normothermic patient, with a PaO2 of 90 mmHg?

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Solution

The dissolved concentration of O2 in a normothermic patient can be calculated using the formula:

C = P * S

where: C is the concentration of the dissolved gas, P is the partial pressure of the gas, and S is the solubility coefficient of the gas.

For oxygen, the solubility coefficient (S) is approximately 0.003 mL O2/dL/mmHg at body temperature.

So, if the PaO2 (partial pressure of oxygen) is 90 mmHg, the dissolved oxygen concentration would be:

C = 90 mmHg * 0.003 mL O2/dL/mmHg = 0.27 mL O2/dL

So, the dissolved concentration of O2 in a normothermic patient with a PaO2 of 90 mmHg is 0.27 mL O2/dL.

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