During mechanical ventilation of a patient with COPD,the PₐO₂ = 58 mm Hg and the FɪO₂ = 0.5.If the desired PₐO₂ is 65 mm Hg,the FɪO₂ needs to be changed to which of the following?
A) 0.44
B) 0.56
C) 0.65
D) 0.74

Question

Quizplus · Accepted Answer

To calculate the new FɪO₂ required to achieve the desired PₐO₂, we can use the following formula:

New FɪO₂ = (desired PₐO₂ × current FɪO₂) / current PₐO₂

Plugging in the given values:

New FɪO₂ = (65 × 0.5) / 58 
New FɪO₂ = 0.56

Therefore, the correct answer is B) 0.56.

During Mechanical Ventilation of a Patient with COPD,the PₐO₂ =