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MANAGEMENT OF
INFECTED FRACTURES
1
PakistanNovember 2015
slides and text available at: www.boneinfection.co.za
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THE PATIENT
THE LIMB THE INJURY
THE BACTERIA
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FACTORS
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THE PATIENT
Poor General Health:
Metabolic and Auto immune disease
and Immune incompetence
Need radical and aggressive treatment
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THE PATIENT
Polytrauma/Comorbidities
Cardiac, pulmonary, renal
and hepatic impairment
Severe infections elsewhere
All compromise responses
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THE INJURY
Energy of Impact
Impregnated debris
Contamination
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THE LIMB
Impaired PerfusionPre-existing arterial and venous disease
Vascular trauma (laceration, thrombosis),
Compression, Needing Fasciotomy
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OVERALL VIABILITY OF LIMB
- Prognosis for residual function
- MESS score & other trauma scores
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THE BACTERIA
Distinguish between
•Commensals and Contaminants
•Colonists and Invaders
•Virulence, local or systemic toxins
•Biofilm, antibiotic resistance
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AFTER ORIF FOR CLOSED
FRACTURES LESS THAN
6 WEEKS OLD
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• Immobilise limb
• Evacuate abscess/haematoma
• Debride necrotic tissue
• Closed irrigation/suction
• Retain effective fixation
• Consider exchange fixation
• Antibiotic therapy
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RATIONALE OF ANTIBIOTIC THERAPY
• Always find bacterial identity and sensitivity
• Choose narrow spectrum gm + ve antibiotic
• Systemic for systemic and well perfused
• Local for poorly perfused tissues
• Surgery for necrosis
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AFTER ORIF FOR FRACTURES
MORE THAN 6 WEEKS OLD
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PRIORITIES IN FRACTURES WITH SOFT TISSUE LOSS OR INFECTION
• Antibiotics for systemic effects ONLY
• Reduce and immobilise bone
• Debride necrotic tissue when demarcated
• Obtain skin cover
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ANTIBIOTICS CANNOT ACCESS
BACTERIA WITHIN NECROTIC
OR POORLY PERFUSED TISSUE
OR WITHIN BIOFILM
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REDUCE AND IMMOBILISE
Retain existing functioningexternal or internal fixation.
External fixation preferred(less invasive - wound access)
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IF MOVEMENT THREATENSIMMOBILISATION
OR CAUSES PAIN WHICH
PREDISPOSES TO DEFORMITY
IMMOBILISE ADJACENT JOINTIN FUNCTIONAL POSITION
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DEBRIDEMENT
Only when clearly demarcated
Skin fat muscle ± 1 week
Ligaments & Tendon ± 4 weeks
Tendo Achilles ± 12 weeks
Bone > 12 weeks
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SOFT TISSUE COVER
Apply expendible split skin graft
when bone and soft tissue
covered by granulation tissue
Avoid complicated composite
local and distant flaps when septic
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BARE BONE
Leave alone till demarcated
or covered by granulation
Provide closed, damp (not soggy)
environment while bone still pink
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Mobilise as best possible
once soft tissue covered
(despite dry bone or sinus)
Patiently await union
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DRAINING SINUSES
• Simple wound toilet
• Tap water, soap and paper towel
• Clean (not sterile) absorbent dressing
• Held by simple non-irritant fixation
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PROMOTE DYNAMISATION
United fibula may inhibit
dynamisation of tibia
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Monitor Blood, X-Ray and
Microbiology every 2 months
THE PATIENT VIGIL
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GIVE UP when
• Fracture solidly united
• New bone can support limb
• No further progress
• Patient insists (economic or social reasons)
• Skin inflammation, itch dermatitis, ulceration
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AS UNION PROGRESSES
Rate of discharge and
blood tests will improve
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WHEN FRACTURE UNITED
Drainage may cease
Consider DRI
(debride, ream, irrigate)
IF NECESSARY
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Remember “degree of infection concept”
Patient may be very well and healthy
despite profusely discharging sinus
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ERADICATION OF INFECTION
Priorities
• Remove hardware and sequestra
• Debride granulation and scar tissue
• Ream full length of medullary canal
• Thoroughly flush surgical field
• Restore soft tissue cover31
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WHY REAM TIP TO TIP?
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ERRADICATION OF INFECTION
•Remove all foreign material, all granulation and scar tissue, as well as all non-viable bone•Ream full length of long bones•Thoroughly flush surgical field•Lay double lumen tubes•Restore soft tissue as far as possible
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AFTER OPERATION
•Splint to align # and immobilise tubes
•Monitor bacteria and wound volume
•Irrigate and suck till cavity is closed
and free of bacteria
(between 2-4 weeks)
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INFECTED NON UNIONSTALEMATE PERSISTS
Evade infection
Local sequestrectomy
Fibular excision osteotomy
( To promote dynamisation)
Pulsed electro magnetic therapy
Pappineau graft38
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INFECTED NON-UNIONSTALEMATE PERSISTS
Confront infection
Two stage Programme
1. Radical Debridement Reaming and Irrigation
2. Fix and maybe graft or
3. Fibular bypass with fixation (variations)
Implants and grafts may lead to re-infection39
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If soft tissues cannot be closed primarily after adequate surgery
•Lay irrigation tubes in medullary canal•Close soft tissue as far as possible without tension•Cover with adhesive plastic (e.g. Opsite Tegaderm)
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If wound not fully closed
Seal with adhesive plasticair tight and water tightwith soft padding and POPInstillation and suction as usualMonitor volume and bacteriaInspect at 3 weeks forgranulation tissue covering bonethrough plastic – no need to expose
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• If bacteria controlled and wound filled in• Plastic surgery as appropriate to restore soft tissue cover• Continue local antibiotics through intramedullary tubes
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IF FRACTURE NOT UNITED AND THERE IS NO SHORTENING
Fix fracture and maybe graft
When soft tissue cover restored
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If fracture gap is up to 2 cms
TibiaPosterior approachCut and transpose fibula to tibiawhile closing tibial gapFix together with fully threaded spongeosaAdd semitubular plate if fibula looks weakApply autogenous bone graftLocal antibiotic and suction drainagePOP cast 2-4 months (weight bear)
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If fracture gap is us to 2 cms
Femur, humerus – allow to shorten After debridement, reaming & irrigationRadius and ulna – match lengths and plate
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If tibial defect more than 2 cmsand fibula is intact, apply bypass graft and screws proximally and distally but pass connecting screws through low profile plate
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Full width defect over 5 cms
Without callus bridge or neighbourRadical DRI bone and soft tissueComfortable soft tissue closurePlaster splint while irrigatingAllow bone to approximate graduallyover 4 weeksAvoid acute shortening
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Fix shortened bone with nailMobilise muscles and jointsWhen united lengthen over nailWhen length corrected, lock nail(exchange for longer nail prn)Remove XFX (after weeks not months)
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Dec 201364
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Jan 201465
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April 201566
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COBUS ERASMUS
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ILIZAROV PRINCIPLES
Distraction/compression
Excise pathology en bloc and transport bone to close gap while opening new gap by callotasis
Acute shortening and lengthening by callotasis at another site
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OTHER TECHNIQUES
Pappineau for infected fracture with skin defect
Masquelet for bone defect withclosed soft tissue cover
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ALL THESE TECHNIQUES CAN BE
ENHANCED BY BEGINNING WITH
A THOROUGH AND METICULOUS
DEBRIDEMENT, REAMING AND IRRIGATION
slides and text available at: www.boneinfection.co.za