Terminology

• Amputation: Intentional surgical removal of a limb or body part.

Aim

• Remove diseased or non-viable tissue (e.g., gangrene, infection, malignancy).
• Relieve pain.
• Construct a stump suitable for prosthetic fitting and functional use.

Amputation is considered when the limb cannot be salvaged or its salvage would result in poor function, high complication risk, or excessive resource use.

Situations like these include:

• Vascular compromise - Irreversible ischemia >6 hours, or limb not perfusing despite resuscitation.
• Severe soft tissue loss or contamination - Extensive loss of muscle, skin, or neurovascular structures (especially posterior compartment muscles) limits reconstructive options. 
• Bone loss - Salvage is time-consuming, requires a motivated and compliant patient, and can risk financial or social burden in low-resource settings. 
• Multitrauma / shock - Life-threatening injuries may necessitate amputation to prioritize patient survival. Patients with poor response to resuscitation may require early amputation to save life. 
• Neurological injury - Irreversible nerve damage that compromises limb function. Absence of plantar sensation alone is not an indication for primary amputation.
• Functional outcome - When limb salvage may result in chronic pain, limited mobility, or repeated interventions. 
• Patient and social factors - Age, comorbidities, occupation, limb dominance, cultural context, and the availability of prosthetics should guide decision-making. 
• Lifestyle factors - Smoking significantly increases the risk of non-union, osteomyelitis, delayed wound healing, surgical site infections, and soft tissue reconstruction failure¹.

In every case, amputation should be viewed as a deliberate reconstructive decision, not a surgical failure. It aims to restore the patient’s independence and functional mobility wherever possible. 

Mangled Extremity Severity Score (MESS) 

The MESS² is a validated tool to help guide decision-making for limb salvage versus amputation. However, the final decision is clinical (including psychosocial factors).

MESS ≤6: Limb salvage is generally feasible.
MESS ≥7: Amputation is often the outcome

* Points are doubled if ischemia duration >6 hours. 

Timing of amputation

Timing depends on patient condition: emergency to save life, urgent to prevent deterioration, elective to optimize function.

1 Emergency

• When - Within hours
• Indications - Severe bleeding, acute ischemia, or severe infection
• Goal - Save the patient’s life

2 Urgent

• When - Within 24–72 hours
• Indications - Failed revascularization, progressive infection, wet gangrene
• Goal - Prevent systemic deterioration

3 Elective (planned)

• When - Days to weeks after injury
• Indications - Chronic limb ischemia, non-healing ulcers, malignancy, limb deformity
• Goal - Maximize function and plan rehabilitation

Key Point

Amputation decisions should always be individualized, taking into account the patient’s clinical status, functional potential, and psychosocial context. Multidisciplinary input: including surgical, rehabilitation, and patient/family perspectives, is essential to achieve the best functional and quality-of-life outcomes.