Question

5. A patient has a predicted forced vital capacity of 3.9L. His measured vital capacity is 2.6L. What percent of predicted did he achieve? He exhaled 1.8L in the first second. What is his fev1/fvc ratio?

Answer 1

A patient has achieved 66.67% of their predicted forced vital capacity by measuring 2.6L out of the predicted 3.9L. Their FEV1/FVC ratio, which is significant in diagnosing lung diseases, is 69.23%..

Step-by-step explanation:

In this case, the student achieved 2.6L out of a predicted value of 3.9L for forced vital capacity (FVC). To find the percent of predicted achieved, you divide the measured value by the predicted value and multiply by 100. So, (2.6/3.9) * 100 = 66.67%.

Therefore, the student achieved approximately 66.67% of the predicted FVC.

The FEV1/FVC ratio can be calculated by dividing the forced expiratory volume in the first second (FEV1) by the forced vital capacity (FVC). In this case, the FEV1 is given as 1.8L and the FVC is 2.6L. So, (1.8/2.6) = 0.6923 or approximately 69.23%.

Therefore, the fev1/fvc ratio is approximately 69.23%.