A Valsalva maneuver during the DLCOsb: A) Is required to properly perform the breath hold B) May cause the D_L/V_A to appear artificially elevated C) May cause the DLCOsb to appear artificially reduced D) Helps keep breath-hold time between 8 and 12 seconds

Question

Quizplus · Accepted Answer

The Valsalva maneuver, which involves forcefully exhaling against a closed glottis, can cause an increase in intrathoracic pressure and a decrease in lung volume. This can result in an artificially reduced DLCOsb measurement. Therefore, it is not recommended during the DLCOsb test.

A Valsalva Maneuver During the DLCOsb