ATLS - Advanced Trauma Life Support Musculoskeletal Trauma Questions and Answers 1

Question 1

A 40-year-old motorcyclist involved in a high-speed collision presents with a clinically unstable pelvis and a blood pressure of 85/50 mmHg. According to ATLS principles, what is the most appropriate and immediate intervention to help control the pelvic hemorrhage?

Accepted Answer

Application of a pelvic binder or circumferential sheet.

Answer

The most appropriate immediate step is to apply a pelvic binder or circumferential sheet. This action serves to close the pelvic volume, which provides temporary stabilization of the fracture, reduces further bleeding by promoting tamponade, and can improve hemodynamic stability. [3, 5, 7] While other listed interventions like surgery, angiography, and transfusion are crucial, the pelvic binder is the fastest, non-invasive first step in hemorrhage control for this specific injury. [3, 7]

Question 2

Which of the following is considered the earliest and most reliable clinical finding in a conscious patient with acute compartment syndrome of the lower leg?

Accepted Answer

Pain that is out of proportion to the apparent injury

Answer

Pain out of proportion to the injury, especially pain with passive stretching of the muscles in the affected compartment, is the earliest and most sensitive sign of acute compartment syndrome. [4, 8, 15] The other signs, such as pallor, pulselessness, and paralysis, are late findings and indicate that significant, and possibly irreversible, ischemic damage has already occurred. [4, 15]

Question 3

A 22-year-old rugby player sustains a knee dislocation on the field. The deformity is immediately reduced by the team physician, and upon arrival to the emergency department, the patient has warm feet and palpable distal pulses. Which potential injury remains a primary concern that requires urgent further evaluation?

Accepted Answer

Popliteal artery injury

Answer

Knee dislocations have a high incidence of associated popliteal artery injury, which can occur even if distal pulses are present due to an intimal tear that can lead to thrombosis. [11, 28, 30] The presence of pulses does not rule out a significant vascular injury. [27] Therefore, urgent vascular assessment, often starting with an Ankle-Brachial Index (ABI) and potentially followed by advanced imaging like a CT angiogram, is mandatory. [27] While ligamentous and nerve injuries are also common, a missed vascular injury is the most significant threat to the limb. [11, 24]

Question 4

In the initial management of a patient with an open tibial fracture, which of the following is the most appropriate sequence of actions in the emergency department according to ATLS guidelines?

Accepted Answer

Remove gross contaminants, cover with a sterile saline-moistened dressing, realign the limb, splint, and administer IV antibiotics.

Answer

The correct initial management for an open fracture involves controlling any life-threatening hemorrhage, removing visible gross contaminants, covering the wound with a sterile dressing to prevent further contamination, gently realigning the limb to a more anatomic position to restore perfusion and relieve pressure on soft tissues, immobilizing it with a splint, and administering prompt intravenous antibiotics and tetanus prophylaxis. [1, 6, 19] Aggressive scrubbing in the ED is not recommended, and tourniquets are only for life-threatening hemorrhage unresponsive to other means. [1]

Question 5

A 70-year-old woman falls and presents with a shortened, externally rotated, and severely swollen right thigh. Her vital signs are HR 120 bpm, BP 90/60 mmHg. This presentation is highly suggestive of a femur fracture with associated hemorrhage. In addition to initiating fluid resuscitation, which intervention is most critical for controlling the ongoing blood loss?

Accepted Answer

Applying a traction splint.

Answer

Applying a traction splint is a critical intervention for a mid-shaft femur fracture. It helps to realign the bone fragments, which reduces the potential space within the thigh for hemorrhage and decreases muscle spasm. This stabilization can significantly reduce ongoing blood loss, which can be 1.0-1.5 liters or more. [21, 22, 25] While fluids and TXA are important components of resuscitation, the traction splint provides mechanical control of the bleeding source. [21, 25]

ATLS - Advanced Trauma Life Support Practice Test

ATLS - Advanced Trauma Life Support Practice Test

ATLS - Advanced Trauma Life Support Musculoskeletal Trauma Questions and Answers 1