NBRC Therapist Multiple-Choice (TMC) Practice Exam

When the pressure monometer shows +4 cm H2O before using a flow-inflating resuscitator, it indicates that there is pre-existing positive pressure in the system, which can affect the ability to properly ventilate the patient. The correct action is to replace the monometer to ensure accurate readings and the safe delivery of positive pressure ventilation.

Having a malfunctioning or improperly calibrated monometer can lead to erroneous pressure readings, which in turn may result in inadequate ventilation or over-distension of the lungs. It's critical for respiratory therapists to rely on precise measurements when utilizing devices for patient ventilation to provide effective respiratory support and avoid complications.

Other alternatives don't adequately address the issue at hand. Adjusting the baseline without correcting the source of the inaccurate reading could lead to improper ventilation strategies. Simply using the bag for CPAP without addressing the inaccurate measurement can compromise patient safety, and the suggestion to add to the pressure reading may not be relevant or appropriate in this context. Thus, replacing the monometer ensures the accuracy of the measurements essential for appropriate therapeutic intervention.