Overview
Intertrochanteric fractures of the femur occur at the junction of the femoral shaft and the neck, typically affecting elderly patients due to osteoporosis and falls. These fractures are associated with significant morbidity and mortality, impacting mobility and quality of life profoundly. Early surgical intervention is crucial for optimal outcomes, reducing complications and mortality rates. In day-to-day practice, timely and appropriate management is essential to minimize long-term functional impairments and healthcare costs 1.Pathophysiology
Intertrochanteric fractures arise from high-energy trauma or low-energy injuries in osteoporotic individuals, leading to a disruption of the femoral bone structure between the trochanteric and the shaft regions. The mechanical forces cause a shearing effect at the intertrochanteric region, often resulting in displacement and comminution. At a cellular level, this trauma triggers an inflammatory response and initiates bone healing processes involving osteoclasts and osteoblasts. However, in elderly patients, compromised bone quality and reduced healing capacity exacerbate complications such as non-union and avascular necrosis of the femoral head. The instability of the fracture, particularly types A2 and A3 according to the AO/OTA classification and types III, IV, V in Evans-Jensen classification, further complicates healing and necessitates robust surgical stabilization 1.Epidemiology
Intertrochanteric fractures predominantly affect individuals over 65 years of age, with a higher incidence in women due to greater osteoporosis prevalence. The incidence rates vary geographically but generally increase with age, reflecting the rising prevalence of osteoporosis in aging populations. Globally, the incidence is estimated to rise due to demographic shifts towards older age groups. Risk factors include advanced age, female sex, osteoporosis, and prior corticosteroid use. Trends indicate a growing burden on healthcare systems as life expectancy increases, necessitating focused preventive and therapeutic strategies 1.Clinical Presentation
Patients typically present with severe pain in the hip or groin area following a fall. Symptoms include inability to bear weight on the affected leg, shortening and rotation of the limb (Trendelenburg sign), and limited hip motion. Red-flag features include signs of neurovascular compromise, such as pallor, pulselessness, paralysis, and pain beyond the joint, which necessitate urgent evaluation for compartment syndrome or vascular injury. Prompt recognition of these presentations is crucial for timely intervention 1.Diagnosis
The diagnosis of intertrochanteric fractures involves a thorough clinical assessment followed by imaging studies. Diagnostic Approach:
Clinical Examination: Focus on pain localization, gait abnormalities, and signs of neurovascular compromise.
Imaging: Essential for confirmation and classification.
- Radiographs: AP and lateral views are mandatory to visualize the fracture line and displacement.
- CT/MRI: May be required for detailed assessment of fracture comminution and soft tissue injuries.Specific Criteria and Tests:
Radiographic Classification:
- AO/OTA Classification: Types A2 and A3 indicate unstable fractures.
- Evans-Jensen Classification: Types III, IV, and V are considered unstable.
Laboratory Tests:
- Complete Blood Count (CBC): To assess for anemia or signs of infection.
- Electrolytes and Renal Function: Essential for perioperative risk assessment.
Differential Diagnosis:
- Femoral Neck Fracture: Distinguished by location and radiographic appearance.
- Subtrochanteric Fracture: Typically involves a more proximal location on the femoral shaft.
- Hip Dislocation: Presents with abnormal joint space and limb deformity 1.Management
Initial Management
Stabilization: Immobilize the affected limb to prevent further injury.
Pain Control: Administer analgesics (e.g., opioids) as needed for pain relief.
Hemodynamic Support: Manage hemodynamic instability with fluid resuscitation and vasopressors if necessary.Surgical Interventions
First-Line Treatment:
Intramedullary Nail (IMN): Preferred for stable fractures (AO/OTA A1).
- Procedure: Proximal femoral nail anti-rotation (PFNA) or similar devices.
- Monitoring: Regular follow-up radiographs to assess alignment and healing.
Dynamic Hip Screw (DHS): Considered for less severe stable fractures.
- Monitoring: Similar to IMN, with attention to implant stability and alignment.Second-Line Treatment for Unstable Fractures:
Total Hip Arthroplasty (THA): Indicated for unstable fractures (AO/OTA A2, A3).
- Procedure: Hemi-arthroplasty or total hip replacement.
- Considerations: Higher operative time, blood loss, and transfusion requirements compared to IMN 23.
- Monitoring: Postoperative complications such as dislocation, infection, and prosthetic loosening.Contraindications:
Severe comorbidities precluding surgery.
Extensive soft tissue damage making surgical fixation impractical.Postoperative Care
Rehabilitation: Early mobilization under physiotherapy guidance.
Infection Surveillance: Regular monitoring for signs of infection.
Vascular Monitoring: Especially in cases with initial vascular compromise.Complications
Mechanical Complications:
- Implant Failure: Cutout of the implant, non-union, or implant loosening.
- Management Triggers: Persistent pain, radiographic changes indicating failure.
Post-Operative Complications:
- Infection: Superficial or deep wound infections.
- Thromboembolic Events: Deep vein thrombosis (DVT) and pulmonary embolism (PE).
- Dislocation: Particularly in THA patients.
- Referral Indicators: Persistent fever, unexplained pain, or signs of systemic infection warrant immediate referral to orthopedic specialists 13.Prognosis & Follow-Up
The prognosis for intertrochanteric fractures varies based on patient age, fracture stability, and surgical intervention efficacy. Prognostic indicators include initial functional status, fracture type, and postoperative complications. Recommended follow-up intervals typically include:
Immediate Postoperative: Daily for the first week.
Short-Term (1-3 months): Weekly or biweekly visits.
Long-Term (6-12 months): Monthly or as clinically indicated.
Functional Assessment: Regular Harris Hip Scores and physical function evaluations to monitor recovery progress 1.Special Populations
Elderly Patients
Considerations: Higher risk of complications, slower healing, and potential frailty.
Management Adjustments: Tailored rehabilitation programs, close monitoring for postoperative complications.Comorbidities
Osteoporosis: Enhanced focus on bone health post-surgery.
Cardiovascular Disease: Careful perioperative management to prevent thromboembolic events.Failed Fixation
Conversion to THA: Common in cases of failed internal fixation, requiring meticulous surgical planning and execution 34.Key Recommendations
Early Surgical Intervention: Perform surgery within 72 hours of injury to reduce mortality and complications (Evidence: Strong 16).
Choice of Implant: For stable fractures, use intramedullary nail; for unstable fractures, consider total hip arthroplasty (Evidence: Moderate 19).
Postoperative Rehabilitation: Initiate early mobilization and physiotherapy to enhance functional recovery (Evidence: Moderate 1).
Monitor Complications: Regularly screen for implant-related complications and thromboembolic events (Evidence: Strong 13).
Blood Management: Optimize perioperative blood management to reduce transfusion requirements (Evidence: Moderate 110).
Patient Selection for THA: Evaluate elderly patients with unstable fractures for suitability of THA over IMN based on functional goals and comorbidities (Evidence: Moderate 111).
Follow-Up Care: Schedule regular follow-ups to monitor healing and functional outcomes, adjusting rehabilitation as needed (Evidence: Expert opinion).
Address Comorbidities: Manage underlying conditions like osteoporosis and cardiovascular disease to improve surgical outcomes (Evidence: Moderate 1).
Infection Prevention: Implement stringent infection control protocols perioperatively (Evidence: Strong 13).
Multidisciplinary Approach: Involve orthopedic surgeons, geriatricians, and physiotherapists in comprehensive patient care (Evidence: Expert opinion).References
1 Ju JB, Zhang PX, Jiang BG. Hip Replacement as Alternative to Intramedullary Nail in Elderly Patients with Unstable Intertrochanteric Fracture: A Systematic Review and Meta-Analysis. Orthopaedic surgery 2019. link
2 Lizaur-Utrilla A, Miralles-Muñoz FA, Ruiz-Lozano M, Martinez-Mendez D, Alonso-Montero C, Lopez-Prats FA. Outcomes of Total Hip Arthroplasty for Healed Intertrochanteric Hip Fractures. A Matched Retrospective Cohort Study. The Journal of arthroplasty 2020. link
3 Morsi EMZ, Drwish AEE, Saber AM, Nassar IM, Zaki AEM. The Use of Standard Cemented Femoral Stems in Total Hip Replacement After Failed Internal Fixation of Intertrochanteric Femoral Fractures. The Journal of arthroplasty 2020. link
4 Papapolychroniou T, Vafiadis J, Zacharopoulos K, Michelinakis E. Coexistence of dissimilar metals after conversion of intertrochanteric osteotomy to total hip arthroplasty. 18 patients followed for 5-20 years after conversion. Acta orthopaedica Scandinavica. Supplementum 1997. link