what does maneuver
The maneuver is based on the fact that when a patient forcibly exhales against a closed nose and mouth while bearing down, as if having a bowel movement, specific changes occur in blood pressure and the rate and volume of blood returning to the heart.
The Heimlich Maneuver is a first-aid technique for someone who is choking because food or another swallowed object is obstructing his or her airway. Using an upward abdominal â¦ thrust, the Heimlich maneuver compresses the lungs and forces air up into the windpipe (trachea).