modified chest thrust

Noun

 * 1)  A first aid procedure used to treat choking in a pregnant or obese patient in which the patient's chest is pressured by the performer's thumb knuckle with their hand balled into a fist to expel air, thereby dislodging the obstruction in the windpipe. This is repeated as many times as necessary.
 * The patient's face was blue from lack of oxygen induced by an airway blockage, which led a quick-thinking EMT on scene to begin modified chest thrusts.