Modern Study Review (AI-Generated)
High-Yield Summary
Compartment syndrome of the foot is a rare but critical surgical emergency primarily seen after high-energy crush injuries or Lisfranc fracture-dislocations. Early recognition is essential to prevent irreversible muscle necrosis, claw-toe deformities, sensory deficits, and chronic pain syndromes. Diagnosis relies on clinical suspicion supported by compartment pressure measurements, with prompt fasciotomy being the definitive treatment to preserve limb function.
Key Diagnostic Findings
| Aspect | Details |
|---|---|
| Anatomy | 9 compartments: Medial, Lateral, Superficial, Adductor, Calcaneal (Manoli), and 4 Interossei compartments. Calcaneal compartment involvement correlates with claw-toe deformities. |
| Clinical Presentation | – Pain out of proportion to injury (most sensitive sign) – Exquisite pain with passive toe extension – Tense, “wood-like” swelling – Distal pulses usually present initially; loss is a late sign – Progressive paresthesias in plantar nerve distribution |
| Imaging | Primarily used to identify associated fractures (e.g., Lisfranc injury); no imaging modality confirms compartment syndrome. |
| Manometry | Delta-P (Diastolic BP – compartment pressure) <30 mmHg is diagnostic threshold for fasciotomy. |
| Differential Diagnosis | Pain proportionate to injury, improves with elevation/splinting, localized swelling, intact neurovascular exam favors trauma without compartment syndrome. |
Current Gold Standard Treatment
- Non-operative: No role once diagnosis is confirmed; close monitoring only if suspicion is low and pressures are normal.
- Operative:
- Emergent fasciotomy is mandatory for confirmed compartment syndrome.
- Surgical approach:
- Two dorsal longitudinal incisions over the 2nd and 4th metatarsals to decompress the 4 interossei and adductor compartments.
- Medial longitudinal incision along the inferior border of abductor hallucis to decompress medial, superficial, lateral, and calcaneal compartments.
- Wound management: Leave wounds open; use sterile dressings or Negative Pressure Wound Therapy (NPWT). Delayed primary closure or split-thickness skin grafting (STSG) performed 3–5 days post-op.
Modern Complications & Outcomes
- Myonecrosis & Contracture: Quadratus plantae and interossei muscle contracture causing rigid claw-toe deformities.
- Neurological Deficits: Injury to medial and lateral plantar nerves results in permanent paresthesias or numbness in the weight-bearing sole.
- Functional Outcomes: Even with timely decompression, patients may experience chronic foot pain and weakness during push-off, impacting gait and quality of life.
- Long-term: Early diagnosis and decompression improve limb salvage and functional outcomes; delayed treatment significantly worsens prognosis.
Classic Clinical Notes
Compartments of the Foot
- Medial: Abductor hallucis, Flexor hallucis brevis
- Lateral: Abductor digiti minimi, Flexor digiti minimi
- Superficial: Flexor digitorum brevis
- Adductor: Adductor hallucis, Distal tendons of flexor digitorum longus, Four lumbricals
- Interosseous: Four separate interosseous compartments
- Calcaneal: Quadratus plantae (Manoli’s compartment)
Anatomical Distribution
- Total of 9 compartments if including Manoli’s calcaneal compartment.
- Superficial, lateral, and medial compartments run the length of the foot.
- Adductor and 4 interossei compartments are confined to the forefoot.
- Calcaneal compartment is a distinct hindfoot/midfoot compartment containing quadratus plantae.
Pathophysiology (Manoli)
- Clawing deformity results from contracture of the quadratus plantae, which pulls on the flexor digitorum longus tendons.
Decompression Technique
- Two dorsal longitudinal incisions decompress the interosseous compartments.
- One medial curved incision decompresses medial, superficial, lateral, adductor, and calcaneal compartments.
Neurovascular Protection
- Lateral and medial plantar nerves run deep to flexor digitorum brevis, between the 1st and 2nd muscular layers.
- 2nd layer: Quadratus plantae, tendons of FDL, tendon of FHL, lumbricals.
- 1st layer: Flexor digitorum brevis, abductor hallucis, abductor digiti minimi.
Last Updated on January 24, 2026 by Christian Veillette
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