BMV uses bag valve masks, or Ambu bags, to supply a person with oxygen. A bag valve mask is a handheld tool that a medical professional can use to pump oxygen into a person’s lungs.

FDA elevates recall of 6.6M Vyaire Medical emergency bag valve masks By Conor Hale Mar 22, 2024 11:39am FDA Class I recall medical device respiratory ...

Take for example, the Ambu bag, or bag valve mask. There's one in every Baltimore County emergency vehicle. It has been around since 1950s with makeovers along the way. Now, it has filters.