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Zorluk: OrtaPhysical Examination Findings

A 24-year-old professional skier is evaluated in the emergency department following a high-speed collision. Radiographs reveal a closed, comminuted fracture of the left tibial shaft. The leg is immobilized in a posterior splint, and he is admitted for planned open reduction and internal fixation the following morning. Three hours after admission, the patient complains of agonizing left leg pain that is no longer relieved by his prescribed intravenous hydromorphone. He describes the pain as a deep, unrelenting ache that feels significantly worse than the pain immediately following the initial injury. Vital signs are stable. Which of the following physical examination findings is the earliest and most reliable indicator for establishing the diagnosis of the suspected complication?

  1. Severe pain elicited by passive plantar flexion of the left ankle and toesCevap
  2. B
    Complete absence of the left dorsalis pedis pulse on palpation or Doppler
  3. C
    Pronounced pallor and coolness of the skin over the distal left foot
  4. D
    Profound loss of two-point discrimination over the dorsum of the left foot
  5. E
    Presence of extensive pitting edema over the anterior left lower leg

Cevap

Severe pain elicited by passive plantar flexion of the left ankle and toes
Acute compartment syndrome (ACS) occurs when increased pressure within a limited fascial space compromises the circulation and function of the tissues within that space. Tibial shaft fractures are the most common cause of ACS. The hallmark of ACS is pain out of proportion to the apparent injury, which is classically exacerbated by passive stretching of the muscles traversing the affected compartment. Because the anterior compartment of the lower leg is most frequently involved, and it contains the dorsiflexors of the foot and toes, passively plantar flexing the ankle and toes stretches these ischemic muscles, eliciting severe pain. This is the earliest and most sensitive clinical finding, preceding other classic signs.

Adım Adım Çözüm

1
Analyze the clinical presentation.
The patient has a high-energy tibial fracture and develops intractable leg pain out of proportion to the injury, despite strong opioid analgesia.
This classic presentation strongly suggests acute compartment syndrome (ACS), a surgical emergency requiring immediate fasciotomy.
2
Determine the earliest clinical sign of ACS.
The earliest physical examination finding is pain on passive stretching of the muscles within the affected compartment.
Before capillary perfusion halts and nerve/muscle ischemia becomes irreversible, stretching the compromised muscle fibers elicits exquisite pain.
3
Apply anatomical principles to the physical examination.
The anterior compartment of the lower leg contains muscles responsible for dorsiflexion (e.g., tibialis anterior, extensor hallucis longus).
Therefore, performing the opposite motion (passive plantar flexion) stretches these muscles, reproducing the intense pain and confirming the diagnosis of anterior compartment syndrome.

Anahtar Kavram

The earliest and most sensitive physical examination finding for acute compartment syndrome is pain with passive stretching of the muscles located in the involved fascial compartment.
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Physical Examination Findings

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