Periprosthetic Femoral Fractures: Vancouver Classification and Phased Post-Operative Rehabilitation
In short
Periprosthetic femoral fractures around total hip arthroplasty require precise treatment tailored to the Vancouver classification. Understand the biomechanical distinctions between Types A, B, and C, and follow evidence-based rehabilitation protocols to ensure fracture union and implant stability.
In this guide (6 sections)
Periprosthetic femoral fractures represent one of the most challenging complications following total hip arthroplasty, frequently arising from low-energy domestic falls in osteoporotic elderly individuals or high-energy trauma. The Vancouver classification system categorises these fractures based on fracture location, stability of the underlying femoral stem, and host bone stock quality. Vancouver Type A fractures involve the trochanteric region (AG for greater, AL for lesser trochanter). Type B fractures occur around or just below the stem, subdivided into B1 (well-fixed stem), B2 (loose stem with preserved bone stock), and B3 (loose stem with severely deficient bone stock). Type C fractures occur well distal to the stem tip. Post-operative physiotherapy protocols must be meticulously coordinated with the specific surgical intervention, balancing fracture healing requirements with joint mobility.
Domestic and Cultural Indian Realities
In Indian home environments, bathroom slips on smooth wet tiles, tripping over loose cotton rugs, and negotiating steep internal stairways are the primary causes of periprosthetic fractures. Following surgical fixation or revision, extensive domestic hazard reduction is imperative. Loose carpets, doorstep thresholds, and floor cords must be cleared. Bathrooms must be fitted with non-slip rubber mats and an elevated western toilet seat at 20 inches height with solid stainless-steel grab bars; traditional squatting commodes must never be used. Floor sleeping on thin cotton mattresses (daris) must be replaced with a firm wooden bed of appropriate height (where hips remain level with knees upon sitting). Multi-storey homes require moving the patient bedroom to the ground floor for the initial 12 weeks to prevent premature stair negotiation.
Clinical Biomechanics and Reconstructive Fixation
The biomechanical approach to periprosthetic femoral fractures depends entirely on the Vancouver subtype. Vancouver B1 and C fractures, where the prosthetic stem remains solidly bonded to host bone, are managed with open reduction and internal fixation utilising lateral locking plates, proximal cerclage cables, and bicortical screws. In contrast, Vancouver B2 and B3 fractures require revision arthroplasty using long, fluted, tapered titanium modular stems that bypass the fracture by at least two cortical diameters, supplemented with structural cortical struts or trabecular metal cones. Early aggressive weight-bearing on an internally fixed B1 fracture risks plate fatigue failure or screw pull-out, whereas premature axial overload on a revised B2/B3 stem risks distal subsidence. Controlled, protected axial loading is gradually introduced to promote bone callus formation without causing shear displacement.
Rehabilitation Assessment and Functional Progression
Physiotherapy evaluation assesses radiological bridging callus, incision healing, and passive hip/knee excursion. Weight-bearing progressions must strictly adhere to the surgeon prescription based on the Vancouver subtype: Type A fractures generally permit partial weight-bearing with protected active abduction restrictions; Type B1 fractures typically require non-weight-bearing or touch-down weight-bearing for 6 weeks; Type B2/B3 revisions require 6 to 8 weeks of flat-foot touch-down weight-bearing before advancing. Once bridging callus is documented radiographically, progressive 25% weekly weight-bearing increments are implemented with bilateral elbow crutches.
Targeted Rehabilitation and Joint Preservation Exercises
Early rehabilitation focuses on calf pumping, isometric quadriceps and gluteal contractions, and gentle seated knee flexion, avoiding rotational torque and open-chain hip abduction.
Seated Active Knee Flexion-Extension with Footboard Support
Objective: Maintain knee joint mobility and stimulate femoral quadriceps tone without inducing bending moments across the femoral fracture
- 1Sit upright on a high, firm chair with thighs supported and both feet resting flat on a smooth surface.
- 2Keeping your heel on the floor, slide the foot backward smoothly to approximately 80 degrees of knee flexion.
- 3Hold the position for 3 seconds, ensuring no pain at the mid-thigh surgical incision.
- 4Slowly slide the foot forward into full extension, contracting the thigh muscle at the finish.
- 5Maintain neutral foot alignment without turning the toes inward or outward.
| Vancouver Subtype | Surgical Strategy | Initial Weight-Bearing Status | Rehabilitation Restrictions |
|---|---|---|---|
| Type A (Trochanteric) | Conservative or Cerclage Wiring / Hook Plate | Partial weight-bearing (30-50%) with walker | No active hip abduction for 6-8 weeks; maintain neutral abduction |
| Type B1 (Fixed Stem) | Locking Compression Plate + Cerclage Cables | Touch-down weight-bearing (10-15 kg) for 6 weeks | Strictly avoid torsion; no straight leg raises; gentle active-assisted knee motion |
| Type B2 (Loose Stem, Good Bone) | Revision Long Diaphyseal Modular Stem | Touch-down weight-bearing for 6 to 8 weeks | Avoid hip flexion >90 deg and adduction; gradual progression to crutches at week 8 |
| Type B3 (Loose Stem, Bone Loss) | Revision Stem + Cortical Struts / Metal Cones | Non to touch-down weight-bearing for 8 to 10 weeks | Prolonged protection; wheelchair mobility early; delayed resistive loading |
| Type C (Distal to Stem) | Distal Femoral Locking Plate Fixation | Touch-down weight-bearing for 6 weeks | Protect knee sagittal alignment; passive to active-assisted knee flexion |
Red Flags and Immediate Surgical Escalation
A sudden sensation of a sharp crack in the thigh during transfer, immediate inability to bear touch-down weight, visible angulation or thigh deformity, or progressive shortening and external rotation of the limb indicates implant subsidence, plate breakage, or fixation failure. Acute severe localized swelling, tense calf muscles, numbness in the foot, or systemic fever warrants immediate emergency orthopaedic escalation.
Frequently Asked Questions
How long does a periprosthetic femur fracture take to heal before I can walk normally?
Bone union typically takes between 10 and 16 weeks to consolidate solidly, verified by sequential radiographs. Full unassisted walking without crutches or canes is usually achieved between 4 and 6 months post-surgery, depending on age, bone mineral density, and whether stem revision was required. Physiotherapy aims to restore functional stability and mobility throughout this healing timeline.
How do I access home-visit physiotherapy for fracture recovery in India?
Patients across India can book qualified orthopaedic physiotherapists through BookPhysio.in under the NCAHP Act 2021. Registered clinicians provide personalised post-fracture home care with direct access and transparent pay-direct session fees.
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