An absolute contraindication to the prehospital use of the military antishock trouser (MAST) garment is:
Pregnancy.
+Pulmonary edema.
+Thoracic injuries.
+Abdominal content evisceration.
+Impaled objects.
MAST garment is a device that surrounds the legs and lower abdomen. When inflated, it applies external pressure to the enclosed body parts. Its use has fallen out of favor because there is little evidence that shows that it improves patient survival in hemorrhagic shock secondary to trauma, and may actually be harmful to patients with penetrating thoracic trauma with short transport times. Relative contraindications for MAST include: pregnancy, impaled objects, evisceration of abdominal contents, and thoracic/diaphragmatic injuries. Pulmonary edema remains an absolute contraindication.