Quality Control of a Body Plethysmograph Is Performed Using an Isothermal

Multiple Choice

Quality control of a body plethysmograph is performed using an isothermal lung analog and a biologic control subject with the following results: On the basis of these findings,the pulmonary function technologist should conclude what?

A) There is a leak in the door seal.
B) Box pressure calibration was performed incorrectly.
C) Mouth pressure calibration was performed incorrectly.
D) The box is functioning within acceptable limits.