BVM is needed in the first 5 minutes with a patient.
A bag-valve-mask (BVM) or Ambu bag is a self-inflating bag used to ventilate a person who is not breathing normally. In an emergency, bag valve mask (BVM) ventilation is usually used until intubation is possible.
A BVM is made up of a non-rebreather valve and a face mask. The bag's opposite end is connected to an oxygen source. The mask is held against the face by hand. Until intubation, the bag is squeezed to provide ventilation to the patient through the nose and mouth.
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