01Purpose and principlesWhat the treatment does and how it fits into care.
Amputation is a treatment with defined goals, not evidence that care has failed. In dysvascular disease it may relieve intractable ischaemic pain, remove all necrotic or grossly infected tissue, achieve a wound that can heal, and preserve the greatest realistic independence. Minor amputations remove toes, rays or part of the foot and can retain useful weight-bearing function when perfusion, infection control and biomechanics are favourable. Major amputation is through or above the ankle and changes energy demand, transfers, balance and prosthetic options substantially.
The decision begins with salvageability and proportionality. NICE CG147 says not to offer major amputation for chronic limb ischaemia until a vascular multidisciplinary team has considered every revascularisation option. The Global Vascular Guidelines support primary amputation for a pre-existing non-functional or unsalvageable limb, poor functional status such as being bedbound, or short life expectancy after shared decision-making. More specific anatomical reasons include absence of a useful distal reconstruction target, destruction of major weight-bearing foot structures, or a limb whose reconstruction would require multiple high-morbidity procedures for little expected function. Secondary amputation may be reasonable after failed or ineffective reconstruction when no further revascularisation is possible and incapacitating pain, a non-healing wound or uncontrolled sepsis persists.
Level selection balances healing probability against function. Preserving the knee generally lowers the energy cost of prosthetic walking and assists transfers, but a transtibial stump that repeatedly fails is worse than a well-planned more proximal level. Evaluate viable soft-tissue coverage, infection clearance, perfusion, joint position, muscle function and likely prosthetic interface. Toe pressure, Doppler waveforms, skin-perfusion pressure or transcutaneous oxygen can inform wound potential, but the Global Vascular Guidelines emphasise that no test predicts healing perfectly. In selected ambulant patients, limited proximal revascularisation may improve healing at a more distal functional level.
Rehabilitation starts before the operation whenever time allows. Agree goals that remain meaningful whether the person uses a prosthesis, a wheelchair or both. Assess pre-morbid mobility, transfers, cognition, vision, upper-limb strength, cardiorespiratory reserve, the opposite limb and foot, home access, support and work or caring roles. Explain pain, wound and prosthetic uncertainty without promising a limb. Postoperatively, manage residual-limb position and oedema, protect the wound, prevent hip or knee flexion contracture, restore transfers and strength, assess falls, supply suitable mobility equipment, address mood and body image, and refer formally to specialist amputee rehabilitation and prosthetics. NCEPOD’s UK review recommends rehabilitation and discharge planning as soon as the need is identified and physiotherapy from the first postoperative day where possible.
Key points
- Major amputation can relieve pain, remove necrotic or infected tissue, achieve healing and preserve achievable independence.
- NICE says major amputation for chronic limb ischaemia follows vascular multidisciplinary consideration of all revascularisation options.
- Primary amputation may be appropriate for an unsalvageable or non-functional limb, very poor functional status or short life expectancy after shared decision-making.
- Secondary amputation may follow failed reconstruction when no useful revascularisation remains and pain, non-healing wounds or sepsis persist.
- Choose the level that is likely to heal and deliver the best realistic function; the most distal level is not automatically best.
- Perfusion tests inform wound potential, but no single measurement predicts amputation-site healing with certainty.
- Start rehabilitation and discharge planning when amputation is identified, with specialist physiotherapy and rehabilitation input before surgery whenever possible.
- Prosthetic prescription is individual: pre-morbid mobility, cognition, cardiopulmonary reserve, contralateral limb, residual-limb healing, goals and environment all matter.
02Indications, selection and cautionsWho may benefit, who needs urgent treatment and important alternatives.
Irreversible necrosis, absent reconstructible outflow, destroyed weight-bearing foot structures or uncontrollable infection may prevent a functional healed foot.
Persistent severe pain, non-healing tissue or uncontrolled infection after ineffective reconstruction can support secondary amputation when no further useful option remains.
Bedbound status, severe frailty, advanced cognitive impairment or short life expectancy can make repeated reconstruction burdensome without realistic independent limb use.
Previous community mobility, clear goals, adequate cognition, balance, upper-limb and cardiopulmonary capacity, a sound opposite limb and healing stump support prosthetic rehabilitation.
Residual infection, inadequate perfusion, oedema, malnutrition, renal disease, smoking, pressure, poor flap coverage or joint contracture increases breakdown and revision risk.
03Assessment before treatmentTests and checks that guide safe selection.
Read from the initial assessment onwards. Tests may run in parallel in urgent care; first-line, preferred, confirmatory, definitive and gold-standard labels appear only when the chapter explicitly states them.
- 01
Complete vascular imaging reviewFirst step - Why
- Confirm reconstructibility and identify whether limited revascularisation could preserve a more functional level.
- Interpretation and limitations
- NICE requires MDT consideration of revascularisation options before non-urgent major amputation. A no-option label needs adequate distal imaging and qualified vascular review, except when urgent source control overrides delay.
- 02
Perfusion and wound-potential assessment - Why
- Estimate whether the proposed incision and flap can heal at a functional level.
- Interpretation and limitations
- Use examination, Doppler waveforms, ankle or toe pressure and selected microcirculatory tests with wound and infection status. No single threshold guarantees healing or failure.
- 03
Infection and tissue-viability assessment - Why
- Define how much tissue must be removed and whether immediate source control is required.
- Interpretation and limitations
- Map wet and dry necrosis, purulence, deep compartments, bone involvement and viable coverage. Imaging and cultures refine treatment, but shock or spreading infection must not wait.
- 04
Anaesthetic, frailty and survival assessment - Why
- Estimate perioperative risk and whether treatment burden matches expected benefit.
- Interpretation and limitations
- Cardiac, pulmonary and renal disease, nutrition, delirium risk, frailty and life expectancy affect timing, anaesthesia, postoperative destination and whether palliation is more proportionate.
- 05
Preoperative rehabilitation assessment - Why
- Define baseline mobility, transfers, goals, home barriers and likely prosthetic use.
- Interpretation and limitations
- Assess cognition, vision, upper limbs, cardiorespiratory reserve, joints, opposite foot, balance, support and environment. Prosthetic suitability is graded and can change; it is not a binary promise.
- 06
Residual-limb and contralateral-foot review - Why
- Detect wound failure and protect the remaining limb during recovery.
- Interpretation and limitations
- Serially assess flap perfusion, infection, oedema, pressure and joint range. The opposite foot carries higher load after surgery and needs footwear, skin inspection and vascular-diabetes prevention.
04Treatment approachPreparation, options, escalation and aftercare.
01Management decisionChoose salvage, amputation or palliationFirst stepA threatened limb may not heal or function despite technically possible reconstruction.+
- 1Clarify urgent source-control needs, pain, tissue loss, infection, vascular anatomy, previous reconstruction and whether the foot can become functional.
- 2For non-emergency major amputation, ensure a vascular multidisciplinary team has considered every proportionate revascularisation option using adequate imaging.
- 3Assess operative risk, life expectancy, pre-morbid mobility, cognition, rehabilitation potential, patient goals and the cumulative burden of repeated salvage procedures.
- 4Discuss limb salvage, primary or secondary amputation and palliation with realistic healing, revision, pain and functional outcomes, then document the shared decision.
- 5Verify that the selected plan has named owners for surgery, pain, infection, rehabilitation, prosthetics, equipment and discharge.
02Level selectionBalance healing with functionAmputation is agreed and more than one anatomical level could remove diseased tissue.+
- 1Define the proximal extent of non-viable or infected tissue and the soft-tissue envelope needed for durable weight bearing or prosthetic loading.
- 2Assess clinical perfusion with pressures, waveforms and selected microcirculatory tests while acknowledging that none predicts healing perfectly.
- 3Involve vascular surgery, specialist physiotherapy and rehabilitation teams to weigh knee preservation, joint contracture, energy cost and prosthetic feasibility.
- 4Consider limited revascularisation when it can materially improve healing at a more distal functional level in a likely ambulant patient.
- 5Choose a level expected to heal once, rather than preserving length that is unlikely to support durable recovery.
03Perioperative rehabilitationStart before surgery and continueThe need for major amputation is identified or emergency surgery has just occurred.+
- 1Agree mobility, self-care, participation and comfort goals; assess home, support, cognition, mood, joints, strength, balance and the contralateral limb.
- 2Plan positioning, pressure care, oedema control, transfer practice, wheelchair and stump board, contracture prevention and discharge before surgery when time permits.
- 3Begin postoperative physiotherapy on the first day where clinically possible, adapting mobilisation to wound, cardiovascular status, pain and delirium.
- 4Refer formally to specialist amputee rehabilitation and prosthetics, and reassess candidacy after healing and functional progress rather than promising a device.
- 5Continue community therapy, falls prevention, equipment review, cardiovascular prevention and opposite-foot protection after discharge.
04Wound or systemic deteriorationEscalate early complicationsEscalationThe residual limb becomes painful, discoloured, swollen, bleeding, infected or systemically unwell.+
- 1Use ABCDE for instability and inspect flap colour, temperature, capillary return, bleeding, oedema, dehiscence and pressure injury.
- 2Seek urgent surgical review for haemorrhage, infection, necrosis, compartment syndrome or failed perfusion, obtaining cultures and imaging without delaying source control.
- 3Continue safe positioning and pressure prevention while reassessing analgesia, nutrition, glycaemia and the need for revision.
05Complications, monitoring and follow-upAdverse effects, response and longer-term review.
- Inspect the wound and residual-limb perfusion daily in hospital and at every planned review; escalate necrosis, spreading erythema, discharge or dehiscence.
- Assess pain as acute surgical, ischaemic, neuropathic, residual-limb or phantom pain and review both benefit and adverse effects of treatment.
- Measure hip and knee range, strength, transfers, balance, falls risk and mobility progress against the person’s goals.
- Review oedema control and compression only through the specialist wound and rehabilitation plan, ensuring it does not compromise perfusion or skin.
- Reassess prosthetic suitability after wound healing and during rehabilitation because medical state, strength, cognition and goals can change.
- Protect and examine the contralateral foot, continue secondary vascular prevention and maintain diabetes, renal, nutrition and smoking care.
- Confirm equipment, home adaptations, community therapy, prosthetic referral, transport and emergency contacts before discharge.
06Special situationsVariants, exceptions and circumstances that change the usual approach.
Amputation has positive goals
Relief of pain, removal of infection, reliable healing and useful independence can make a planned amputation the most restorative option.
Length is not function
A distal stump that cannot heal, bear load or fit a prosthesis may cause repeated operations and longer immobility than a proximal durable level.
Knee preservation matters
When healing is plausible, a transtibial level usually reduces prosthetic energy demand and supports transfers compared with transfemoral amputation.
Testing is probabilistic
Toe pressure, transcutaneous oxygen and skin-perfusion measures refine wound-potential judgement but cannot guarantee an individual flap will heal.
Prostheses are not universal
A wheelchair can be the primary mobility tool or complement a prosthesis; success is measured against personal participation goals.
The other limb is vulnerable
The contralateral foot bears more load and shares systemic vascular risk, so prevention and rapid assessment of new injury are essential.
07Common pitfallsFrequent interpretation and management errors.
- 01
Describing major amputation as inevitable before adequate vascular imaging and multidisciplinary revascularisation review.
- 02
Pursuing repeated salvage procedures without reconsidering pain, function, life expectancy or the patient’s priorities.
- 03
Selecting the most distal level despite infection, inadequate soft tissue or perfusion that makes primary healing unlikely.
- 04
Using one perfusion threshold as a guarantee that an amputation site will heal.
- 05
Starting rehabilitation only after wound healing and allowing avoidable deconditioning, flexion contracture or discharge delay.
- 06
Promising a prosthesis without assessing cognition, cardiopulmonary reserve, opposite-limb health, mobility and home environment.
- 07
Neglecting falls, wheelchair skills, mood, phantom pain, equipment or the contralateral foot because the surgical wound looks satisfactory.