What is Below Knee Amputation?
Below knee amputation (BKA), also known as transtibial amputation, is a surgical procedure that removes the lower part of the leg while preserving the knee joint. The goal is to remove diseased, damaged, or non-viable tissue while enabling the patient to regain mobility with the help of a prosthetic limb.
When is Below Knee Amputation Recommended?
BKA is typically considered a last resort when other treatments have failed to preserve the limb. It may be recommended in the following situations:
- Severe peripheral arterial disease (PAD) leading to gangrene or tissue death
- Non-healing diabetic foot ulcers with deep infection
- Traumatic injury beyond repair
- Malignant tumors of the lower leg
- Severe frostbite or burns
- Failed previous limb salvage procedures
How is Below Knee Amputation Performed?
The surgery is performed under regional or general anesthesia. The surgeon makes an incision below the knee, removes the damaged tissue or bone, and carefully shapes the remaining muscles and skin to form a healthy, rounded stump suitable for a prosthesis. Blood vessels are tied off, and nerves are managed to minimize future pain. The wound is then closed, and a dressing or temporary prosthetic protector is applied.
What to Expect During Recovery After Below Knee Amputation?
Recovery typically begins with a short hospital stay followed by rehabilitation. Pain, swelling, and emotional adjustment are common early challenges. Physical therapy focuses on strengthening the remaining limb, improving balance, and learning to use a prosthesis.
Most patients begin fitting for a prosthetic leg within 6 to 8 weeks, depending on how the residual limb heals. Emotional and psychological support is also a key part of recovery. With proper rehab, many patients regain significant mobility and independence.
What are the Risks of Below Knee Amputation?
Like all major surgeries, BKA carries certain risks:
- Infection
- Poor wound healing
- Phantom limb pain
- Blood clots
- Stump complications (e.g., skin breakdown, neuromas)
- Psychological challenges such as grief or depression
What are the Benefits of Below Knee Amputation?
When medically necessary, BKA can improve a patient’s health and quality of life:
- Removal of nonviable or infected tissue
- Relief from chronic pain or infection
- Faster recovery compared to above-knee amputation
- Improved prosthetic function with preserved knee joint
- Enhanced potential for independent mobility and return to activities
Below knee amputation is a life-changing procedure that, when combined with proper rehabilitation and support, can lead to a fulfilling and active life.
