Modified-chest-thrusts Definition

noun

(emergency medicine) 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.

The patient's face was blue from lack of oxygen induced by an airway blockage which led a fast thinking EMT on scene to begin and successfully perform modified chest thrusts on the very fat patient.
Wiktionary
Plural form of modified chest thrust.
My hands were very tired during the Heimlich maneuver class after we got to the modified chest thrusts part, four rounds of modified chest thrusts I lost too much dexterity in my hands to continue!
Wiktionary