Prepare for the Prehospital Trauma Life Support (PHTLS) exam. Access diverse quizzes and multiple-choice questions, each with hints and comprehensive explanations. Enhance your readiness and confidence for the PHTLS certification exam!

Multiple Choice

Hypotension of unknown etiology in a trauma patient should be assumed to result from which of the following?

In a trauma patient with hypotension of unknown cause, the most likely source is blood loss. Hemorrhagic shock is the leading cause of hypotension in trauma because bleeding—external or internal—reduces circulating volume and preload, leading to decreased cardiac output and blood pressure. Even though conditions like cardiac tamponade, tension pneumothorax, or spinal injury can cause hypotension, they typically present with additional signs that point to a specific mechanism and require immediate targeted interventions. Treating the scenario as hemorrhage first—rapid hemorrhage control, early large-bore IV access, and swift transport with ongoing resuscitation—addresses the most probable and deadly cause while you assess for other injuries.

In a trauma patient with hypotension of unknown cause, the most likely source is blood loss. Hemorrhagic shock is the leading cause of hypotension in trauma because bleeding—external or internal—reduces circulating volume and preload, leading to decreased cardiac output and blood pressure. Even though conditions like cardiac tamponade, tension pneumothorax, or spinal injury can cause hypotension, they typically present with additional signs that point to a specific mechanism and require immediate targeted interventions. Treating the scenario as hemorrhage first—rapid hemorrhage control, early large-bore IV access, and swift transport with ongoing resuscitation—addresses the most probable and deadly cause while you assess for other injuries.