Patient must undergo NPO (nothing by mouth) for at least 8 hours. Baseline CBC, coagulation profile, and serum glucose monitoring are mandatory. Pre-operative prophylactic intravenous antibiotics and patient site marking in the OR are required. Anesthesia consultation for spinal or general sedation.
Strict non-weight bearing on the affected limb using assistive devices. Regular wound dressing changes to monitor for infection. Pain management with intravenous analgesia transitioning to oral medication. Physical therapy initiation once the incision stabilizes. Follow-up for suture removal at 14 days post-op.
A Comprehensive Clinical Guide to Partial Calcanectomy
1. Introduction and Overview
A partial calcanectomy is a specialized orthopedic surgical procedure involving the resection of a portion of the calcaneus (the heel bone). Unlike a total calcanectomy, which involves the complete removal of the heel bone—a procedure usually reserved for catastrophic trauma or severe malignancy—the partial calcanectomy is a limb-salvage intervention. It is most frequently employed in the management of chronic, non-healing heel ulcers, particularly in patients with diabetes mellitus, peripheral vascular disease, or chronic osteomyelitis.
The primary goal of this procedure is the removal of devitalized, infected, or necrotic bone to facilitate wound closure and prevent the progression of deep-tissue infection to systemic sepsis or higher-level amputation. By reducing the bony prominence of the posterior or plantar calcaneus, the surgeon minimizes focal pressure points, thereby addressing the mechanical etiology of the ulceration.
2. Technical Specifications and Mechanisms
The calcaneus is the largest bone in the foot and serves as the primary weight-bearing structure of the hindfoot. Its structural integrity is essential for gait mechanics.
Biomechanical Considerations
- Weight-Bearing: The posterior aspect of the calcaneus serves as the attachment point for the Achilles tendon. Resection must be carefully calibrated to avoid compromising the insertion of the triceps surae complex.
- Pressure Distribution: Chronic ulcers often occur at the plantar-posterior aspect of the calcaneus due to repetitive mechanical trauma. A partial calcanectomy "debulks" this area, shifting the weight-bearing load to more stable, healthy soft tissues.
- Vascularity: The calcaneus receives its blood supply from the calcaneal branches of the posterior tibial and peroneal arteries. Surgeons must exercise caution to preserve these vascular pedicles to ensure healing of the remaining bone and overlying skin.
| Feature | Description |
|---|---|
| Primary Objective | Debridement of necrotic bone and pressure relief. |
| Anatomical Target | Posterior or plantar-posterior calcaneal tuberosity. |
| Surgical Intent | Limb salvage; prevention of proximal amputation. |
| Key Anatomy Involved | Calcaneus, Achilles tendon insertion, plantar fascia origin. |
3. Clinical Indications and Usage
The decision to perform a partial calcanectomy is rarely taken in isolation; it is usually the final step in a failed conservative management plan.
Indications
- Chronic Osteomyelitis: Persistent infection of the calcaneus that has failed to respond to long-term intravenous antibiotic therapy.
- Non-healing Pressure Ulcers: Grade 3 or 4 Wagner ulcers that exhibit exposed bone and fail to epithelialize despite offloading.
- Calcaneal Prominence: Anatomical deformity leading to repetitive skin breakdown in neuropathic patients.
- Post-Traumatic Necrosis: Localized bone death following high-energy fractures that have resulted in soft tissue compromise.
Patient Selection Criteria
Candidates must be evaluated for:
1. Vascular Status: Adequate arterial perfusion (via Ankle-Brachial Index or Toe-Brachial Index) is mandatory for wound healing.
2. Nutritional Status: Pre-operative albumin and pre-albumin levels are assessed to ensure metabolic capacity for bone and tissue repair.
3. Glycemic Control: HbA1c levels are optimized to reduce the risk of post-operative infection.
4. Surgical Procedure: Step-by-Step
The procedure is generally performed under general or regional anesthesia (popliteal nerve block).
Step 1: Incision and Exposure
Depending on the ulcer location, a curvilinear, "hockey-stick," or longitudinal incision is made. Great care is taken to avoid disrupting the neurovascular bundle.
Step 2: Debridement
All necrotic, hyperkeratotic, or infected soft tissue is excised. The surgeon identifies the infected portion of the calcaneus, often marked by discoloration (yellow/gray) and lack of bleeding (the "bleeding bone" sign).
Step 3: Resection
Using an oscillating saw or a rongeur, the surgeon removes the diseased bone. The resection is performed until healthy, punctate bleeding bone is visualized. The remaining edges are smoothed (saucerized) to prevent future pressure points.
Step 4: Closure and Drainage
In many cases, the wound is left to heal by secondary intention or via a delayed primary closure if the vascular supply is robust. A closed-suction drain may be placed to prevent hematoma formation.
5. Post-Operative Recovery and Protocol
The recovery phase is critical to the long-term success of the procedure.
- Phase I (Weeks 0–2): Strict non-weight bearing (NWB) using a wheelchair or knee scooter. Elevation is vital to minimize edema.
- Phase II (Weeks 2–6): Transition to offloading boots (e.g., CROW boot or total contact cast) once sutures are removed. Weekly wound monitoring.
- Phase III (Weeks 6+): Gradual transition to protective footwear with custom orthotics designed to redistribute plantar pressure.
6. Risks, Side Effects, and Contraindications
Potential Complications
- Wound Dehiscence: The most common complication, often due to poor vascularity.
- Recurrent Infection: Incomplete resection of infected bone can lead to a return of osteomyelitis.
- Gait Abnormalities: Significant resection can alter the lever arm of the Achilles tendon, leading to a "calcaneal gait."
- Hematoma: Can lead to infection or skin necrosis.
Contraindications
- Severe Peripheral Arterial Disease (PAD): Without revascularization, the wound will not heal.
- Active Sepsis: Patient must be medically stabilized before elective orthopedic intervention.
- Extensive Bone Involvement: If the infection has spread to the talus or midfoot, a partial calcanectomy is insufficient.
7. Alternative Treatments
Before opting for surgery, the following should be considered:
* Total Contact Casting (TCC): The gold standard for offloading diabetic foot ulcers.
* Hyperbaric Oxygen Therapy (HBOT): Used as an adjunct to increase tissue oxygenation in chronic wounds.
* Vacuum-Assisted Closure (VAC): Effective for managing exudate and promoting granulation tissue in deep cavities.
* Amputation (Syme or Below-Knee): Considered only when limb salvage is deemed physiologically impossible or endangers the patient's life.
8. Frequently Asked Questions (FAQ)
1. Is a partial calcanectomy the same as a total heel removal?
No. A partial calcanectomy removes only the infected or prominent bone, whereas a total calcanectomy removes the entire bone. Partial is preferred for limb salvage.
2. How long does it take for the wound to heal?
Healing times vary significantly based on the patient's vascular status, but generally range from 8 to 16 weeks.
3. Will I be able to walk normally after the surgery?
Most patients can return to normal ambulation, though they will require custom orthotic footwear to protect the area and prevent pressure recurrence.
4. What is the success rate of this procedure?
In well-selected patients with adequate vascularity, limb salvage rates are high (often >80%).
5. Does the Achilles tendon need to be reattached?
Usually, the Achilles tendon retains enough of its insertion point even after a partial resection. If the resection is extensive, the surgeon may perform a tenodesis to secure the tendon to the remaining bone.
6. Can a diabetic patient undergo this procedure?
Yes, diabetes is the most common indication. However, glycemic control must be strictly managed before and after the procedure.
7. Is pain a major factor post-operatively?
Post-operative pain is typically well-managed with local nerve blocks and oral analgesics. The immobilization requirement is often more challenging for patients than the pain itself.
8. What happens if the infection returns?
If the infection recurs, the surgeon must reassess the vascular supply and the extent of the residual osteomyelitis. A repeat debridement or a higher-level amputation may be required.
9. Do I need antibiotics after surgery?
Yes, a course of culture-directed intravenous or oral antibiotics is standard, typically lasting 4 to 6 weeks depending on the severity of the osteomyelitis.
10. How do I prevent the ulcer from coming back?
Strict adherence to pressure-offloading footwear, daily skin inspections, and regular follow-ups with a podiatrist or wound care specialist are essential.
9. Conclusion
The partial calcanectomy serves as a vital bridge between conservative wound care and major amputation. By judiciously removing diseased bone and addressing the mechanical causes of tissue breakdown, surgeons can successfully salvage limbs that would otherwise be lost. Success, however, is heavily dependent on a multidisciplinary approach involving vascular surgery, endocrinology, and specialized wound care, ensuring the patient is optimized before, during, and after the intervention.