Open Lower Limb Trauma & the BOAST/ BAPRAS Standards

Antibiotic Prophylaxis in Open Tibial Fractures

• Speed matters → strongest evidence is for administration within 3 h (preferably <1 h) of injury
• Continue only as long as needed → overuse increases resistance & C. difficile risk.
• For contaminated farm injuries, some centres add metronidazole (for anaerobic cover).
• If closure delayed >72 h → stop prophylaxis; restart perioperatively at closure.

Recommended Protocol (UK practice)

Duration by Gustilo Grade

• Grade I: 24–48 h perioperative cover only.
• Grade II: 48 h perioperative cover.
• Grade III: Until definitive soft tissue closure or max 72 h after injury — whichever comes first.

Timing of Wound Excision

• Immediate surgery only if
  • Gross contamination (e.g., farm, sewage, marine)
  • Compartment syndrome
  • De vascularised limb
  • Polytrauma / multiply injured patient
• Otherwise
  • Formal wound & bone excision by senior orthopaedic + plastic surgeons
  • On scheduled trauma list within 24 h of injury
  • 6-hour rule does not apply to isolated open fractures without the above urgent features

The “6-hour Rule”

• Historical dogma: Debride within 6 h to reduce infection risk.
• No significant infection rate difference if debridement done up to 24 h, provided antibiotics are given early

Key Studies :

• Harley et al — No increase in deep infection/non-union up to 13 h.
• Patzakis & Wilkins — Delay >12 h did not raise infection risk; antibiotic timing was more important.
• Ashford et al — Infection rate actually lower with delays between 6–37 h.
• LEAP study — No difference in infection, union, or functional outcomes for debridement up to 24 h.
• Crowley et al — Recommend timing be based on earliest opportunity when experienced ortho + plastics team are available.

Rationale for Delayed (but Planned) Surgery

• Night-time surgery risks → reduced consultant input, fatigue, limited resources.
• Early antibiotics and wound sealing in ED stabilise bacterial load until formal debridement.
• Better outcomes when first debridement is thorough and performed by experienced combined teams.

Practical Protocol

• In ED:
  • Antibiotics + tetanus
  • Remove gross contaminants, photograph, seal wound
  • Splintage & NV checks
• In theatre:
  • Semi-elective trauma list <24 h
  • Combined ortho–plastics presence
  • Meticulous excision of devitalised tissue & fracture stabilisation
• Urgent (<6 h): Only for contamination, ischaemia, compartment syndrome, or polytrauma

Guidelines on Wound Debridement (Excision) in Open Lower Limb Fracture

• Early accurate debridement most important surgical step in preventing infection
• Debridement excision of all devitalised tissue (skin, fat, muscle, bone) except neurovascular bundles

Surgical Sequence

A. Preparation

• Social wash: Before theatre, wash limb with soap solution + soft brush to remove surface debris.
• Transfer to OR and prep entire limb with alcoholic chlorhexidine
• Tourniquet
  • Inflate for bloodless field if extensive degloving or distorted anatomy (neurovascular at risk).
  • Leave deflated if soft tissue largely intact — bleeding helps assess viability

B. Wound Approach

• Generous wound extension along fasciotomy lines for exposure
• Identify & protect neurovascular bundles early
• Work superficial → deep and periphery → centre
• Skin: Preserve as much as possible; excise non-viable tissue. Watch for degloving.
• Subcutaneous fat: Excise devitalised fat — often greater damage than skin zone.
• Muscle: Assess with 4 C’s:
  • Colour (pink, not blue)
  • Consistency (firm, not friable)
  • Contractility (twitches to stimulation)
  • Capacity to bleed
• Bone: Excise grossly contaminated, loose fragments with no soft tissue attachments. Preserve viable cortical fragments

C. Zone of Injury

• Damage often extends beyond visible wound edges.
• Plan flaps and anastomoses outside zone of injury to maximise vascular reliability.

D. Post-Debridement

• Classify fracture (Gustilo)
• Plan reconstruction jointly with plastics + ortho senior team.
• If single-stage fixation + cover not possible
  • Apply VAC dressing
  • Antibiotic bead pouch if segmental bone loss

Practical Pearls

• Avoid antiseptic in open wound during prep — cytotoxic risk.
• Protect perforators outside injury zone if considering local flap.
• Inspect posterior muscle compartments — devitalised muscle can be hidden behind tibia or in medullary canal.
• Minimise repeat returns to theatre — single, meticulous debridement is gold standard.

Why Avoid Antiseptic in an Open Wound During Prep?

• Alcoholic chlorhexidine, povidone-iodine are toxic to fibroblasts, endothelial cells, and myocytes
• Delay granulation impair angiogenesis, and compromise any planned flap/graft take
• Endothelial injury from antiseptic contact impairs capillary ingrowth and wound healing
• In contaminated wounds increase infection risk because viable tissue is weakened.
• Prep the intact skin around the wound with antiseptic solution (alcoholic chlorhexidine preferred)
• Avoid direct contact with exposed muscle, bone, or neurovascular structures
• If skin prep runs into wound → irrigate with sterile saline immediately to minimise contact time
• For wound cleansing, sterile saline
• Certain rare high-contamination scenarios (marine water, heavy organic contamination) may prompt selective antiseptic use, but this is not routine and usually applied after viability assessment, not before

Bone Exposure, Decontamination, and Preservation

• Bone viability is judged after tourniquet release by capacity to bleed (“paprika sign”), not by appearance alone
• Lavage is never a substitute for sharp debridement — it is the final step once the wound is clean.

Surgical Sequence

A. Exposure

1. Extend the traumatic wound to the nearest fasciotomy incision (preserves fasciocutaneous perforators for possible flap coverage).
2. Deliver fracture ends through the wound extension for full circumferential assessment.
   • This does not cause new damage if done carefully — most periosteal stripping occurs during the injury
3. Preserve neurovascular structures and remaining periosteum wherever possible.

B. Bone Viability Assessment

• Paprika sign = punctate cortical bleeding after tourniquet release → viable.
• Differentiate true cortical bleeding from medullary ooze in stripped bone ends.
• Factors to consider:
  • Soft tissue attachments
  • Quality of periosteal sleeve
  • Extent of stripping
• Tourniquet:
  • Inflated for soft tissue dissection if needed
  • Deflate before bone assessment to check bleeding

C. Removal Criteria

• Loose fragments failing the tug test → remove.
• Larger fragments:
  • Remove if no bleeding and no viable attachment.
  • Exception: Major articular fragments if they can be reduced and fixed absolutely stable — otherwise remove
• Never treat necrotic bone as “free graft” — it’s a nidus for infection

D. Decontamination Technique

• Use forceps, curettes, scrubbing brush, or bone nibblers to remove embedded debris.
• Work zone-by-zone, periodically irrigating to maintain visibility
• Inspect posterior compartments and medullary canal for lodged fragments

E. Lavage

• Start only when wound appears clean
• Low-pressure (<14 psi), large-volume warm saline
• Avoid high-pressure pulsatile lavage — shown to drive bacteria deeper into bone/soft tissue

Classification of Open Fractures

Gustilo–Anderson (G&A)

Byrd & Spicer

• Based on bone vascularity and need for flap:
  • Type I–II: Circulation preserved (endo/periosteal)
  • Type III: Devitalised bone, flap needed
  • Type IV: Requires free flap
• Rarely used; oversimplified.

Scoring Systems — Include limb and patient factors, often aimed at amputation prediction

1. Mangled Extremity Severity Score (MESS)

• Considers skeletal/soft tissue damage, ischaemia, shock, and age.
• Score ≥7 → high likelihood of amputation.
• Specific but not sensitive — can over-predict amputation.

2. Nisssa

• Nerve injury, Ischaemia, Soft tissue injury, Skeletal injury, Shock, Age.
• More sensitive and specific than MESS.

3. Limb Salvage Index (LSI)

• Designed for limbs with arterial compromise.
• Scores skin, nerve, muscle, bone, artery, veins + warm ischaemia time.
• ≥6 → amputation likely.
• Never classify before debridement — contamination and tissue loss are often underestimated in ED.
• Use G&A for immediate communication post-excision; supplement with AO for audit.

Q: Why should Gustilo grading only be applied after debridement?
A: Injury severity is often underestimated pre-debridement; interobserver reliability improves after full inspection.

Q: Which score is most sensitive for amputation prediction?
A: NISSSA — more sensitive and specific than MESS.

Q: What’s the main advantage of AO classification?
A: Separates injury grading for different tissues; more comprehensive prognostically.

Q: In which setting is Ganga Hospital Score most useful?
A: In tertiary orthoplastic units — combines injury severity with comorbidity impact to predict reconstruction/amputation needs

Temporary Wound Dressings

Negative Pressure Wound Therapy (NPWT)

• Mechanism: Foam + subatmospheric pressure (-125 mmHg) under an occlusive drape.
• Benefits:
  • Reduces fluid pooling
  • Prevents cortical bone desiccation
  • Maintains moist wound environment
• Limitations:
  • Does not decontaminate wounds — requires proper surgical excision first.
  • Delays in soft tissue cover >7 days, even with NPWT, ↑ deep infection risk.

Antibiotic Bead Pouches

• Technique: Tobramycin-impregnated PMMA cement beads placed in wound cavity, covered with semipermeable membrane.
• Indications:
  • Segmental bone loss
  • Heavy contamination
  • Established infection
• Evidence:
  • Multiple series show ↓ infection and osteomyelitis rates in grade III fractures when added to systemic antibiotics
• Advantages:
  • High local antibiotic delivery without systemic toxicity.
  • Can fill dead space temporarily before staged bone reconstruction.

Techniques for Skeletal Stabilization in Open Tibial Fractures

• Spanning external fixation = default if definitive fixation + immediate cover not possible at primary debridement
• Internal fixation is safe if
  • Minimal contamination
  • Soft tissue cover achieved simultaneously
• Early exchange from spanning external fixation → internal fixation is preferred
• Modern multiplanar/circular fixators for
  • Significant contamination
  • Bone loss
  • Multilevel fractures

Provisional Stabilization

• Why?
  • Stabilises fracture
  • Facilitates soft tissue healing
  • Allows damage-control orthopaedics principles
• Avoid:
  • Traction
  • Long leg plaster slabs
• Preferred:
  • Stable spanning external fixation
  • Must be applied to allow access for flap surgery
• Safe pin corridors (by tibial segment):
  • Segment 1 (proximal third): Oblique to avoid posterior tibial NV bundle
  • Segment 2 (middle third): AP screws safe; avoid over-penetration
  • Segment 3 (distal third): AP screws via TA–EHL interval; beware tethering skin if distally-based flap may be needed

3. Definitive Stabilization – Choice Factors

4. Timing & Sequence

• If using internal fixation:
  • Must have simultaneous definitive soft tissue cover
  • Delayed cover over implant = ↑ infection risk
• Safe exchange window:
  • Ideally within 72h at second-look debridement
  • Must include soft tissue cover at same time
  • If >72h missed → consider definitive multiplanar/circular external fixation
• Risk: Pin tract infection → intramedullary contamination if conversion delayed

Timing of Soft Tissue Reconstruction in Open Fractures

• Timing goal: Within 7 days (before vessels become friable/fibrotic)
• 5-day rule: Little scientific basis — real principle is “as early as safely possible”, ideally before day 7

Why Early Coverage Matters

• Reduces:
  • Deep infection
  • Flap failure
  • Osteomyelitis
  • Non-union
  • Number of secondary operations
• Facilitates:
  • Early rehabilitation
  • Shorter hospital stay
  • Single definitive surgery (fix & flap)

Type of Soft Tissue Reconstruction in Open Tibial Fractures

• All open fractures → cover with vascularised soft tissue (muscle or fasciocutaneous)
• NPWT / foam dressings = temporary only — not a substitute for definitive flap cover
• Local fasciocutaneous flaps → suitable for low-energy tibial fractures, if vascularity intact and outside the primary zone of injury/degloving
• Tibial shaft (diaphyseal) fractures with periosteal stripping → muscle flaps preferred
• Metaphyseal / peri-ankle fractures → fasciocutaneous flaps often optimal (including free perforator flaps).

Muscle vs Fasciocutaneous

Muscle Flaps

• Advantages:
  • Obliterate dead space → ↓ haematoma/seroma → ↓ infection risk.
  • High vascularity → enhances bacterial clearance.
  • Conform to irregular defects.
  • Strong biological contribution to fracture healing (cellular & humoral factors).
• Limitations: Donor site morbidity, contour deficit, less aesthetic resurfacing, difficult re-exploration.

Fasciocutaneous Flaps

• Advantages:
  • Replace “like with like” (skin over skin).
  • Simpler harvest (especially local options).
  • Better contour/aesthetics, especially around joints/ankle.
  • Easier re-exploration for secondary bone grafting.
  • Good option in medically complex patients unsuitable for long microsurgical procedures.
• Limitations:
  • Higher necrosis rate in comorbid patients
  • May be less effective in bacterial clearance compared to muscle

Compartment Syndrome

• Earliest symptoms:
  • Pain out of proportion to injury, ↑ on passive stretch of compartment-specific muscles.
  • Paraesthesia in sensory nerve distribution of affected compartment.
• Late signs: paralysis, pallor — indicate established ischaemia (poor prognostic signs).
• Peripheral pulses: Usually preserved — loss suggests major vascular injury, not compartment syndrome.

Compartment Pressure Measurement

• ΔP method:
  • ΔP = Diastolic BP – ICP
  • ΔP ≤ 30 mmHg

Surgical Decompression — Two-incision

• Purpose: Access all four compartments; preserve skin perforators for future local flaps.
• Incisions:
  • Medial: 1–2 cm posterior to medial tibial border; decompress superficial & deep posterior compartments; avoid posterior tibial perforators (10 cm perforator most reliable).
  • Lateral: 2 cm lateral to anterior tibial border; decompress anterior & peroneal compartments; divide peroneal septum
• Skin closure
  • High complication rates with primary closure if swelling persists.
  • If non-viable tissue excised: consider immediate meshed SSG + NPWT.
  • Alternatively, NPWT temporarily until swelling subsides → delayed closure or grafting.
• Scar revision can be performed later for cosmesis

Late Diagnosis Dilemma

• After irreversible necrosis, fasciotomy may
  • ↑ infection risk.
  • Necessitate compartmentectomy or amputation.
• If >35 h post-injury → high risk of severe infection/death.
• Supportive care: IV fluids, electrolyte correction for rhabdomyolysis.

Vascular Injuries in Limb Trauma

• Warm ischaemia thresholds
  • Aim: Restore circulation within 3–4 h (muscle death begins thereafter).
  • Max: 6 h warm ischaemia before irreversible damage is expected.
• Don’t be reassured by normal-appearing toe cap refill — may be misleading due to venous backflow
• Always suspect major vascular injury with absent pulses — do not attribute to spasm or compartment syndrome without senior review

Immediate Action — No Delays for Imaging

• Pre-op angiography in a clearly devascularized limb wastes time — site of injury often predictable from fracture/dislocation pattern
• If location uncertain: On-table angiogram via groin femoral puncture can help (fast, intra-op).

Damage Control Vascular Surgery

• Shunts (carotid Javid / Pruitt) → rapidly restore flow → ↓ ischaemia time, ↓ fasciotomy rate.
• Shunt both artery and vein (proximal to trifurcation) if injured
• Order of priorities (in unstable limb):
  1. Rapid shunt insertion (artery ± vein).
  2. Assess limb viability
  3. Skeletal stabilization (simple bridging external fixator).
  4. Definitive repair (reversed vein graft — cephalic often better than saphenous)
• Tip: Don’t cross-clamp for graft insertion until limb has been reperfused for ≥ 2 h.
• Cephalic vein advantages over saphenous
  1. Thinner wall, less muscular → less spasm
  2. Dilates more easily for higher flow
  3. Often unaffected in leg trauma

Venous Repair

• Above trifurcation → repair veins as well as arteries.
• Patency rates high proximally (femoral/popliteal) but poor distally.
• Venous repair reduces swelling, infection risk, and improves fracture healing.

Fasciotomy Considerations

• Reperfusion injury → swelling may develop hours later → repeat ICP checks.
• Use ΔP (DBP – ICP ≤ 30 mmHg) threshold.
• Liberal fasciotomy after revascularization.

Single Vessel Run-off

• Common after peroneal/anterior tibial injury
• Not a contraindication to free flap if end-to-side anastomosis feasible and flow adequate.
• Consider vessel reconstruction, esp. posterior tibial artery.

a. Intravascular shunt first (Javid, Pruitt-Inahara, or improvised with sterile tubing) — restore arterial inflow within the ischaemia window (ideally <3–4 hours, certainly <6). Shunt the vein too if injured proximal to the trifurcation, to reduce venous hypertension and improve flap survival later.

b. Reassess limb viability with flow restored — MESS score, soft tissue envelope, bone loss, nerve status. This is the decision point for limb salvage vs primary amputation.

c. Skeletal stabilisation — bridging external fixator across the zone of injury. Quick, gets length and alignment, protects the shunt and soft tissues, allows access for the plastic surgeon. Definitive internal fixation comes later.

d. Wound debridement — radical excision of all devitalised tissue (skin, fat, fascia, muscle, bone). Pulsatile lavage. The “4 Cs” for muscle viability (colour, contractility, consistency, capillary bleeding). This is where the orthoplastic principle bites — debride as if you’re going to close immediately, because contamination left behind becomes osteomyelitis.

e. Definitive vascular repair — reversed vein graft, with contralateral long saphenous vein as workhorse; cephalic vein from the upper limb is often a better calibre match for tibial vessels and avoids ipsilateral limb dissection. Avoid using vein from the injured limb if there’s any concern about deep venous outflow.

f. Fasciotomies — low threshold, four-compartment in the leg. Mandatory if ischaemia time >4–6 hours, combined arterial and venous injury, prolonged hypotension, or any clinical suspicion. Don’t wait for compartment syndrome to declare itself in this group.

g. Soft tissue cover plan — if the plastic surgeon is in theatre, definitive cover (local flap, free flap) at the same sitting is ideal (“fix and flap”), provided physiology permits. Otherwise, NPWT dressing and return within 72 hours per BOAST-4.

Open Fractures of the Foot and Ankle

• Limited local flap options for coverage.
• Frequent neurovascular injury.
• Intra-articular fractures → high risk of long-term stiffness & poor function.
• Difficulties in stable fixation due to limited anchor points.

Salvage vs Amputation

• Consider amputation if functional outcome after reconstruction will likely be worse than a transtibial prosthesis
• High-risk patterns for poor salvage:
  • Floating ankle (distal tibia + hindfoot fracture-dislocation).
  • Severe crush with open midfoot/forefoot injuries → stiff, painful foot even after reconstruction.

Acute Management Principles

Damage control orthoplastics approach:

1. Spanning external fixator first:
   • Maintains length & alignment.
   • Facilitates imaging & soft tissue recovery.
   • Avoid fibular plating in the acute phase (unless ORIF of fibula at primary surgery will clearly help length & alignment in pilon fractures).
   • If fixation pins in metatarsals are not possible → suspend foot from tibia + os calcis frame.
2. Definitive fixation at time of definitive soft tissue cover:
3. Flap choice:
   • Plantar: Fasciocutaneous flaps preferred; reinnervation may ↓ ulcer risk.
   • Dorsal: Skin graft or thin fasciocutaneous flap.
4. Nerve/Vessel injuries:
   • Assess posterior tibial nerve (plantar sensation).
   • For posterior tibial artery injury: consider autologous vein graft.
   • Avoid end-to-end anastomosis across intimal injury zones.

Posterior Tibial Nerve Assessment

• The posterior tibial nerve supplies motor to intrinsic foot muscles and sensory to plantar surface (weight-bearing area).
• Loss of plantar sensation affects gait, balance, ulcer risk
• Absent plantar sensation at presentation is not an absolute indication for amputation.
  • If nerve is in continuity → expectant repair.
  • If transected + massive muscle loss/posterior compartment loss + warm ischaemia >4–6 h → poor prognosis

Posterior Tibial Artery Injury

• Why repair
  • Main supply to plantar arch (especially in diabetics/single-vessel runoff).
  • Loss risks plantar ischaemia, flap failure (especially plantar flaps).
• Preferred method: Autologous vein graft (reversed saphenous or cephalic vein).
• When not to repair
  • If there is proven collateral flow and the limb has adequate perfusion and there are higher surgical priorities (damage control)
  • But in reconstructive planning, posterior tibial flow is critical for plantar flap survival.

Avoiding End-to-End Anastomosis Across Intimal Injury Zones

• Risk of thrombosis — disrupted endothelium is thrombogenic
• Risk of anastomotic failure — suture line placed in diseased segment → poor healing, early occlusion
• Underestimation of injury length — intimal disruption can extend several cm proximal/distal to the apparent injury
• Best practice:
  • Resect back to macroscopically & Doppler-confirmed healthy vessel.
  • Then interpose a vein graft to bridge the gap.
  • Avoid tension — arterial repairs under stretch are more likely to fail.

Degloved plantar skin

• Suprafascial → Defat + replace as full-thickness graft.
• Proximally based subfascial → Suture back without tension.
• Distally based subfascial → Consider microvascular revascularisation.

Pattern-Specific Notes

Open pilon fractures

• Span with ex-fix acutely.
• If ORIF of tibial plafond planned → primary fibular fixation can help maintain length.
• Soft tissue cover: thin, pliable fasciocutaneous flaps.

Open talus/calcaneus fractures

• Often medial soft tissue defect; consider medial plantar island flap for small heel defects.
• Extensive → thin fasciocutaneous free flaps (reinnervated if possible).
• High infection risk with ORIF; delay definitive fixation until soft tissues optimal.
• Extruded talus → reimplantation only if low contamination & bone viable.

Open midfoot

• Often crush injuries → high long-term stiffness & pain.
• External fixation + skin graft/flap acutely; consider amputation if function predicted to be poor.

Open metatarsals

• Single fracture → follow general open fracture principles.
• Multiple/crush → soft tissue takes priority; high risk of needing ray amputation.

When Things Go Wrong with Soft Tissues

Local Flap Complications

Tip Necrosis

• Most vulnerable zone = tip (least vascularised).
• Management
  • Return to theatre early (usually within 72 h of signs).
  • Excise necrotic tip → advance flap or consider new flap/free flap.

Delayed Anastomotic Failure

• Most arterial thromboses: first 24 h.
• Most venous problems: after 24 h (3× more common than arterial)

Deep Infection After Coverage

• Often related to underlying fracture/fixation.
• Management:
  • Elevate flap, explore fracture site.
  • Remove non-essential deep metalwork.
  • Deep tissue/bone samples for MCS/histology.
  • Debride to a wound bed as healthy as primary excision.
  • Temporary antibiotic bead pouch → delayed reconstruction

When Things Go Wrong with Bone

Early bone problems = wound leakage, sepsis, loss of alignment.

• Common causes:
  1. Inadequate debridement.
  2. Haematoma formation.
  3. Delayed/inappropriate soft tissue cover.
  4. Unstable or inappropriate fixation.

1. Wound Leakage

• Pathophysiology: failure of primary healing; most often due to haematoma in dead space.
• Risks:
  • Under flap: increases flap necrosis risk.
  • Infection nidus.
• Management
  • Small & localised → antibiotics + close observation
  • No resolution within days → return to theatre for evacuation ± drainage.
  • Prevent by obliterating dead space at index cover

2. Early Sepsis

• Most often due to:
  • Inadequate debridement.
  • Delay to soft tissue closure.
• Classification issues: “Superficial vs deep” infection in open fractures is misleading — almost always represents a deep problem
• Antibiotic suppression:
  • Possible for low virulence organisms (e.g. coagulase-negative staph) until union.
  • Not advisable for MRSA, Gram-negatives — often need surgical revision.
• Examples:
  • IM nail infections: early CRP rise; lock bolt wounds & entry site infection are red flags → early exchange nailing + antibiotics may succeed if caught before pus and high-virulence organisms.
  • Established infection: implant removal, debridement, resection, reaming/lavage; interim external fixator; later definitive fixation.
• External fixator pin site infections:
  • Avoid pins in zone of injury.
  • If infection → relocate pins outside compromised tissue.

Primary Amputation in Open Tibial Fractures

Primary amputation is damage control surgery in limb trauma when salvage is not viable or would harm the patient. The aim is life before limb, with function preserved where possible.

Absolute Indications

1. Uncontrollable haemorrhage from open tibial injury
   • Often in blast injuries with multiple arterial/venous injuries at different levels.
2. Crush injuries exceeding >6 h warm ischaemia time.
3. Incomplete traumatic amputations with severely injured distal remnant.

Relative / “Grey Zone” Indications

(Decision depends on injury pattern + patient factors)

• Avascular limb >4–6 h warm ischaemia
  • Threshold lowered if hypotensive during this period.
• Segmental muscle loss in >2 compartments (esp. posterior compartment).
• Segmental bone loss > ⅓ tibial length (≈ >10–12 cm) — often >12 months reconstruction time.
• Severe open foot injury with poor plantar skin, hindfoot fracture/dislocation, talar extrusion → functional outcome equivalent to BK prosthesis.

Not an Indication

• Absent plantar sensation at presentation
  • Often neuropraxia; >50% recover sensation.
  • Requires exploration of tibial nerve during debridement.
  • Amputation only if: divided tibial nerve + major muscle loss + prolonged ischaemia.

Damage Control Context

• If patient unstable → prolonged salvage risks ARDS, DIC, MOF.
• Options:
  1. Primary amputation if injury clearly unsalvageable.
  2. Shunt + span: temporary intravascular shunt + external fixation, limited debridement → return when physiology stable.

Reconstruction vs Amputation – Timeframe & Function

• Distraction osteogenesis: ~45 days/cm → 10 cm defect = ~15 months, multiple surgeries.
• BK prosthetic rehab: ~5–6 months to independent walking if no other injuries
• Function: Medium-term studies show similar QoL and return to work for successful salvage vs amputation (Grade IIIB/IIIC)
• Long-term: AK amputees often abandon prosthesis after ~10 years; BK users maintain independence longer.
• Two consultant rule for amputation decisions: medicolegal + ethical safeguard.
• Socioeconomic context matters — occupation, support, rehab potential influence decision.

Management of Severe Open Fractures in Children

1. Debridement — same principles as adults; no paediatric “tissue recovery advantage.”
2. Skeletal fixation — dictated by fracture pattern; beware of growth plates with IM devices.
3. Union times — generally shorter in <12 years (prepubertal).
4. Soft tissue cover — vascularized flaps remain gold standard; avoid reliance on grafting/granulation.

Part One — The Acute Open Tibial Fracture

The case: a clinical photograph of an open tibial fracture at the junction of the middle and distal thirds of the leg, with periosteal stripping and a high-energy mechanism. A young man, extricated from a road traffic collision.

A1 — Q: Describe this photograph.

A2 — Q: What classifications do you know?

A3 — Q: How would you manage this patient?

A4 — Q: Take me through your examination of the limb.

A5 — Q: What investigations?

A6 — Q: Will you take him to theatre tonight?

A7 — Q: Describe your debridement.

A8 — Q: External fixator or intramedullary nail?

A9 — Q: How would you reconstruct the soft tissue defect?

The reconstructive options by level

A10 — Q: How do you expose your recipient vessels?

A11 — Q: How would you manage a devascularised limb?

A12 — Q: When would you amputate?

A13 — Q: Take me through the below-knee amputation.

A14 — Q: Your flap fails on day two. What now?

Part Two — The Transferred Limb

The case: repatriated from a holiday destination two days after a road traffic collision. Extricated some hours after the accident. Gustilo–Anderson IIIB. He has already had wound excision, external fixation and a negative pressure dressing abroad.

B1 — Q: How would you manage this patient?

Part Three — Compartment Syndrome, Rhabdomyolysis and the Late Sequelae

The examiner now turns to the other leg: a tense, excruciatingly painful calf in a patient who was trapped for several hours, with a falling urine output, a mild metabolic acidosis and a creatine kinase of 6,000.

C1 — Q: What is going on, and what will you do?

C2 — Q: Take me through the fasciotomy.

C3 — Q: And if he were intubated and sedated?

Asking the intensivist about rising analgesic requirement is a genuinely intelligent proxy for pain in a sedated patient, and almost nobody says it. Add the others: unexplained tachycardia, escalating vasopressor need, rising CK, and increasing tenseness on serial examination. C4 — Q: Is there ever a reason not to decompress?

C5 — Q: Tell me about rhabdomyolysis.

C6 — Q: He returns at 18 months with a draining sinus. What now?

Evidence Summary

Every citation below has been checked against the primary source. Where a claim in the source notes could not be verified, it has been removed rather than reworded.

Supporting cast, worth knowing by name but not worth volunteering: Rajasekaran (Ganga Hospital Open Injury Score); OTA-OFC; Friedrich 1898 (the six-hour rule’s origin); Robinson (skew flap); Ertl (osteomyoplasty); Burgess (long posterior flap).