Zone 1: ~46cm

Zone 3: ~28 cm

•  Zone 1: Placement of aortic balloon in the descending thoracic aorta (insert catheter to Zone 1 markers (45 - 49 cm at the level of the sheath) or measure the balloon with P tip from sternal notch to arterial sheath).
• Consider using for suspected infradiaphragmatic hemorrhage with high suspicion for intra-abdominal hemorrhage (positive FAST, significant mechanism of injury that involves the abdomen).
• Zone 2: DO NOT PLACE REBOA IN THIS ZONE—placement here risks injuring or thrombosing mesenteric vessels supplying abdominal visceral organs.
• Zone 3: Placement of aortic balloon directly above the aortic bifurcation (insert catheter to Zone 3 markers [26 - 29 cm] or measure P-tip from the xyphoid process to arterial sheath). Only use when intra-abdominal hemorrhage has been ruled out (negative FAST or mechanism/injury pattern that is not consistent with a concomitant abdominal injury). Consider use for: pelvic hemorrhage, junctional hemorrhage, profuse hemorrhage from high traumatic lower extremity amputations not controlled by tourniquets.