A DLCO Simulator Using Two Precision Gases Is Set Up

Multiple Choice

A DLCO simulator using two precision gases is set up to check the accuracy of an automated single-breath diffusion testing system.The following results are obtained using a 4-L inspired volume: Both of the DLCO values are less than the expected values from the simulator.Which of the following best describes these findings?

A) The IVC measurement is erroneous.
B) The gas analyzer measured CO incorrectly.
C) The gas analyzer measured the trace gas incorrectly.
D) BTPS correction was inadvertently left on during the simulation.