trauma
Compartment Syndrome - Leg
advanced
6 min
26 marks
6 questions
Clinical Scenario
A 22-year-old male is reviewed 8 hours after sustaining a closed tibial shaft fracture in a soccer match. He has had an intramedullary nail inserted and is in a below-knee backslab. Nursing staff report he is requiring escalating opioid analgesia and the pain seems disproportionate to his injury. He reports tingling in his toes. On examination, the calf is tense and he has severe pain with passive toe extension.
Cross-section of leg showing four compartments (anterior, lateral, superficial posterior, deep posterior) with neurovascular structures. Inset shows two-incision fasciotomy technique with anterolateral and posteromedial incisions.
Image source: Open Access medical literature (NIH/PubMed Central) • CC-BY License
Questions
Question 1 (4 marks)
Describe the clinical features of compartment syndrome and identify which features are present in this case.
Question 2 (4 marks)
What are the risk factors for leg compartment syndrome? Which are present in this patient?
Question 3 (5 marks)
How would you confirm the diagnosis and what are your immediate management steps?
Question 4 (6 marks)
Describe the surgical technique for four-compartment fasciotomy of the leg.
Question 5 (4 marks)
What are the consequences of delayed or missed compartment syndrome?
Question 6 (3 marks)
Discuss the medicolegal considerations in compartment syndrome management.
Exam Day Cheat Sheet
Must Mention
- •Pain out of proportion + pain with passive stretch = most reliable EARLY signs
- •Pulses usually PRESERVED - do NOT wait for pulselessness
- •Delta P <30mmHg = fasciotomy (diastolic - compartment pressure)
- •Do NOT elevate limb (reduces perfusion pressure)
- •Two-incision, four-compartment fasciotomy
- •Irreversible damage at 6-8 hours
- •Leave wounds OPEN
Common Pitfalls
- •Waiting for pulselessness (pulses usually preserved)
- •Elevating the limb (reduces perfusion pressure - keep at heart level)
- •Delaying for pressure measurement when clinical diagnosis clear
- •Single incision release (must do two incisions, four compartments)
- •Incomplete release (must be full length)
- •Primary wound closure (always leave open)
- •Not documenting serial examinations (medicolegal risk)
- •Missing deep posterior compartment (most commonly missed)