Question

Shunt increases by ____ % for every ____ mmHg of A-a gradient.

a) 10%, 1 mmHg
b) 5%, 10 mmHg
c) 1%, 5 mmHg
d) 20%, 2 mmHg

Answer 1

The question about the relationship between shunt percentage and A-a gradient cannot be answered with the provided reference materials; additional information or sources are required.

Step-by-step explanation:

The student's question regards the increase of shunt percentage relative to the increase in the alveolar-arterial (A-a) oxygen gradient. However, the information needed to answer this question is not provided in the reference materials. These materials do not contain a direct correlation between the change in shunt percentage and changes in the A-a gradient. Therefore, we are unable to give an exact answer to the student's question based on these materials. Further clarification or additional sources are required to provide an accurate response. In medicine, especially topics like respiratory physiology, it is crucial to rely on up-to-date textbooks or clinical guidelines to obtain information on parameters such as shunt fraction in relation to A-a gradient changes.