Chapter 8, Problem 1CAQ3

Summary Introduction

To review:

The given blank space in the statement, “The paradox in this case was that even though the patient’s PA_O2 and Pa_o increased in response to the increased ventilation-perfusion ratio, the actual amount of oxygen being transported (________ decreased;__________ increased;_______ remained the same) because of the (__________ increased; ________ decreased) blood flow”.

Introduction:

The relationship between the amount of ventilation and the pulmonary capillary blood flow is known as the ventilation-perfusion ratio. Ideally, the lungs need to receive the same amount of capillary blood and ventilation. The overall ventilation-perfusion ratio is 0.8. The ratio depends on the ventilation and perfusion, and not just on the partial pressure of oxygen.