(PASG)—also known as a MAST suit (Military/Medical Anti-Shock Trouser)—is an inflatable, multi-compartment device placed around a trauma patient's legs and abdomen to treat severe hypovolemic shock. It works by increasing systemic vascular resistance and forcing blood from the lower body to the brain, heart, and lungs, effectively increasing central blood volume.Key Features & MechanismDesign: Consists of three independently inflatable sections (two leg, one abdominal) made of fabric with internal bladders.Application: Used for systolic blood pressure below 80–100 mmHg in trauma cases to manage hemorrhage from pelvic or femur fractures.Function: Increases cardiac output and blood pressure, splints fractures.