The following raw data are obtained from spirometry and a He-dilution FRC test (all values have been corrected to BTPS): What is the patient's TLC?
A) 5.5 L (BTP
B) 6.0 L (BTP
C) 4.7 L (BTP
D) 7.3 L (BTP

Question

The following raw data are obtained from spirometry and a He-dilution FRC test (all values have been corrected to BTPS):  What is the patient's TLC?
A) 5.5 L (BTP
B) 6.0 L (BTP
C) 4.7 L (BTP
D) 7.3 L (BTP

Quizplus · Accepted Answer

The patient's TLC can be calculated using the FRC and inspiratory capacity (IC) obtained from spirometry. TLC = FRC + IC. From the given data, FRC is 2.5 L (BTPS) and IC is 3.5 L (BTPS). Therefore, TLC = 2.5 + 3.5 = 6.0 L (BTPS). Choice B is the correct answer.

The Following Raw Data Are Obtained from Spirometry and a He-Dilution