Open-fracture grading and debridement principles

Start with physiology and mechanism. Establish energy, crush or entrapment, contamination source, timing, first aid, water or farm exposure, tetanus history, anticoagulants, diabetes, vascular disease, smoking and baseline function. Control catastrophic bleeding before inspecting detail. Expose the whole limb and look for degloving and remote wounds. A pinhole can have been created from inside by a bone spike, so wound length cannot establish injury severity or communication.

The emergency examination is structured and repeated. Record dorsalis pedis, posterior tibial or relevant upper-limb pulses, Doppler signals, capillary refill, temperature and named peripheral nerve motor and sensory findings. Document compartments and active bleeding. Photograph once when governance permits. Remove only gross material that is sitting freely on the surface; do not probe, squeeze, repeatedly uncover or irrigate in the emergency department. Apply saline-soaked sterile gauze and an occlusive film.

Antibiotic timing matters more than inventing one universal drug. BOASt requires intravenous prophylaxis as soon as possible, ideally within one hour, and a readily accessible trauma-network regimen. Select agent and weight-based dose from that pathway because allergy, contamination, local resistance and renal function alter the prescription. Record all pre-hospital and referring-hospital doses so transfer does not create gaps. Assess tetanus risk and immunisation or immunoglobulin need using the current Green Book pathway.

Realignment reduces continued tissue injury and may restore perfusion. Provide analgesia, gently correct gross length and rotation and use a padded splint. Repeat circulation and nerve findings with the exact time. A deformed pulseless limb is realigned immediately; if pulse remains different from the other side, suspect arterial injury until CT angiography or exploration proves otherwise. Uncontrolled haemorrhage or a still-ischaemic limb needs emergency revascularisation and should not wait for routine imaging.

Initial classification is descriptive. Record wound position and approximate size, contamination, crush, skin loss, muscle viability, exposed bone, degloving and neurovascular findings. Gustilo type I describes a small low-energy wound with limited damage; type II is larger without extensive stripping; type III reflects high-energy or extensive tissue damage. IIIA has adequate cover after debridement, IIIB requires flap reconstruction for exposed bone, and IIIC has an arterial injury requiring repair. Reliable grading follows debridement, not a brief resuscitation-room view.

Formal debridement is a systematic operation led jointly by orthopaedic and plastic surgeons for injuries in BOASt scope. Extend through planned fasciotomy or reconstructive incisions, remove contamination and excise non-viable skin, fat, fascia, muscle and bone while preserving useful perfused structures. Muscle assessment uses colour, consistency, contractility and bleeding in context. Take deep microbiology only when clinically indicated by the operative pathway; routine pre-debridement wound swabs do not define prophylaxis.

Timing reflects biology. Debride immediately for highly contaminated agricultural, aquatic or sewage wounds and for vascular compromise from ischaemia or compartment syndrome. Other solitary high-energy injuries undergo debridement within twelve hours, and other low-energy injuries within twenty-four. After debridement, change instruments and re-prepare and drape before a clean fixation or reconstructive phase. Stabilisation restores length and enables care, but definitive internal fixation should coincide with definitive cover.

Close or cover definitively during debridement when suitable, otherwise within seventy-two hours. Coordinate fixation, recipient vessels, flap choice and incision position from the outset. If salvage versus delayed primary amputation is uncertain, involve orthopaedic and plastic surgeons, rehabilitation, the patient and family; a delayed primary amputation, when chosen, should occur within seventy-two hours. Discharge planning includes wound and flap surveillance, weight bearing, union imaging, antibiotics only for a defined indication, smoking cessation and rehabilitation.