The V_D/V_T ratio may be estimated noninvasively by measuring which of the following?

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The V_D/V_T ratio is calculated by dividing the mixed expired PCO2 (PCO₂) by the end-tidal PCO2 (PCO₂). Therefore, measuring the mixed expired and end-tidal PCO2 is necessary to estimate the ratio noninvasively. Option A includes measuring V_T, which is not relevant to the ratio calculation. Option C includes measuring V_T, which is again not needed for this ratio. Option D includes measuring arterial PCO2, which is invasive and not necessary for noninvasive estimation of the ratio.

The VD/VT Ratio May Be Estimated Noninvasively by Measuring Which

The V_D/V_T Ratio May Be Estimated Noninvasively by Measuring Which