Emergency Medical Technician (EMT) Basic Certification Practice Exam

What is the estimated blood loss associated with a femur injury?

1. 500 mL

2. 1000 mL

3. 1500 mL

4. 2000 mL

The correct answer is: 1500 mL

For a femur injury, the estimated blood loss can be significant due to the large vascular supply to the thigh and the size of the femur itself. A typical estimate for blood loss from a femur fracture is around 1500 mL, making this option the most accurate in a clinical context. In trauma cases, the femur can be associated with substantial hemorrhage due to both venous and arterial vessels in the area. If a fracture occurs, especially with substantial displacement or associated soft tissue injury, the potential for significant blood loss increases. Correctly identifying the estimated blood loss is crucial for EMTs and other healthcare providers as it informs their triage decisions and interventions on scene. Other options may underestimate or overestimate the potential blood loss. For instance, 500 mL and 1000 mL could be plausible for minor injuries or less severe cases, while 2000 mL would exceed typical estimates for a fractured femur, which generally aligns more closely with the 1500 mL estimate. Understanding these figures helps in preparing for potential shock management and fluid resuscitation, both essential components of emergency care.