REBOA: Resuscitative Endovascular Balloon Occlusion of the Aorta; CXR: Chest X-Ray; EFAST: Extended Focused Assessment with Sonography for Trauma; ATLS: Advanced Trauma Life Support; EKG: Electrocardiogram; SBP: Systolic Blood Pressure; CPR: Cardiopulmonary Resuscitation; A/P/J: Abdomen/Pelvis/ Junctional Lower Extremity.

Zone 1 REBOA: Placement of aortic balloon in the descending thoracic aorta (insert catheter to Zone 1 markers (45 - 49 cm) or measure P-tip from the sternal notch to the arterial sheath).

Zone 3 REBOA: 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).