A patient has a reported SaO₂ of 90%,hemoglobin 15 g%,PaO₂ of 61 mmHg,cardiac output of 6 L/min,and CvO₂ of 14.2 vol%.What would the C(a-v)O₂ equal?

Question

Quizplus · Accepted Answer

C(a-v)O₂, the arterial-venous oxygen content difference, is calculated using the formula: C(a-v)O₂ = CaO₂ - CvO₂. Given that the CvO₂ (venous oxygen content) is 14.2 vol%, and knowing that CaO₂ (arterial oxygen content) can be estimated using the formula: CaO₂ = (Hb * 1.34 * SaO₂) + (PaO₂ * 0.003), where Hb is hemoglobin in g/dL, SaO₂ is the arterial oxygen saturation, and PaO₂ is the partial pressure of oxygen in arterial blood in mmHg. Substituting the given values: CaO₂ = (15 * 1.34 * 0.90) + (61 * 0.003) ≈ 18.27 vol%. Therefore, C(a-v)O₂ = 18.27 - 14.2 = 4.07 vol%.

A Patient Has a Reported SaO₂ of 90%,hemoglobin 15 G%,PaO₂