What is the Bag-Valve-Mask (BVM) used for?

• A. A hand-held device used to provide positive pressure ventilation to a patient who is not breathing or who is breathing inadequately.
• B. A device to measure blood pressure.
• C. An instrument for listening to heart sounds.
• D. A monitor for skin oxygenation.

Answer: (A)

The Bag-Valve-Mask is a handheld tool designed to deliver breaths to someone who isn’t breathing or isn’t breathing adequately. It combines a self-inflating bag, a one-way valve, and a face mask, and often includes an oxygen reservoir to provide higher oxygen concentration. When you squeeze the bag, air (often with added oxygen) is forced into the patient’s lungs, delivering positive-pressure ventilation. This device is essential during emergencies like CPR or any scenario where the patient needs assisted ventilation. Using it requires a proper seal and airway management to ensure the breaths cause the chest to rise and to avoid air entering the stomach. It’s not used to measure blood pressure, listen to heart sounds, or monitor skin oxygenation.