Overview
Intertrochanteric fractures of the femur involve the proximal femur, specifically the area between the lesser trochanter and the femoral neck. These fractures are particularly prevalent among elderly individuals, often resulting from low-energy trauma due to osteoporosis. The clinical significance of intertrochanteric fractures lies in their high morbidity and mortality rates, with mortality exceeding that of femoral neck fractures in patients aged 75 and above 13. Early surgical intervention is crucial to mitigate complications such as pressure ulcers, deep vein thrombosis, pulmonary embolism, aspiration pneumonia, and urinary tract infections, thereby significantly reducing the risk of death within 24 months post-injury 56. Understanding and effectively managing these fractures is essential for improving patient outcomes in geriatric care.Pathophysiology
Intertrochanteric fractures typically occur due to a torsional force applied to the hip, often resulting from a fall from standing height in osteoporotic individuals. The mechanical stress disrupts the trabecular bone in the femoral neck and intertrochanteric region, leading to a fracture line that extends between the greater and lesser trochanters. This disruption compromises the structural integrity of the hip joint, affecting both stability and function. At a cellular level, osteoporosis reduces bone density and quality, making the bone more susceptible to fractures 1. The subsequent inflammatory response and hematoma formation can further complicate healing, necessitating careful surgical stabilization to restore anatomical alignment and promote proper bone union 7.Epidemiology
The incidence of intertrochanteric fractures is rising with aging populations and increased prevalence of osteoporosis. These fractures predominantly affect individuals over 70 years of age, with a higher male-to-female ratio observed compared to femoral neck fractures 12. Geographic variations exist, influenced by lifestyle factors, bone health awareness, and healthcare access. Risk factors include advanced age, female gender, low body mass index, and comorbidities such as osteoporosis, diabetes, and chronic kidney disease. Trends indicate a steady increase in incidence rates, particularly in regions with aging demographics, highlighting the growing clinical burden 12.Clinical Presentation
Patients with intertrochanteric fractures typically present with severe pain in the hip or groin area, inability to bear weight on the affected limb, and external rotation of the leg due to shortening of the femur. Atypical presentations may include subtle symptoms in patients with cognitive impairment or those who are non-verbal. Red-flag features include significant deformity, inability to reduce the limb passively, and signs of neurovascular compromise, which necessitate urgent evaluation and intervention 1.Diagnosis
The diagnostic approach for intertrochanteric fractures involves a thorough clinical assessment followed by imaging studies. Key diagnostic criteria include:Clinical Assessment: History of trauma, pain localized to the hip, and inability to weight-bear.
Imaging:
- X-rays: Essential for confirming the fracture type and assessing displacement. Key findings include a fracture line crossing the intertrochanteric region and involvement of the lesser trochanter.
- CT Scan: Useful for detailed assessment of fracture comminution and planning surgical approaches.
- MRI: May be considered to evaluate soft tissue injuries and assess for associated injuries like hip joint capsule tears.Differential Diagnosis:
Femoral Neck Fracture: Distinguished by the fracture line typically not crossing the lesser trochanter.
Subtrochanteric Fracture: Fracture line extends below the lesser trochanter.
Pelvic Fractures: Considered if there is associated pelvic pain or instability on examination 3.Management
Surgical Intervention
#### Proximal Femur Bionic Nails (PFBNs)
Indications: Suitable for stable and unstable intertrochanteric fractures in elderly patients.
Procedure: Minimally invasive surgical approach to stabilize the fracture with PFBNs, offering better maintenance of fracture stability and reduced complications compared to traditional methods.
Outcomes: Shorter operation times, reduced blood loss, earlier weight-bearing capacity, and improved functional outcomes (e.g., Harris Hip Score >80) 1011.#### Proximal Femoral Nail Anti-rotation (PFNA) and InterTan
Indications: Alternative options for stabilization.
Procedure: Similar surgical techniques but with noted differences in complication profiles.
Outcomes: PFNA and InterTan also effective but with higher incidences of specific complications like blade cut-out and nail back-out 789.#### Cemented Bipolar Hemiarthroplasty
Indications: For unstable fractures where internal fixation may be challenging.
Procedure: Arthroplasty performed via anterolateral approach.
Outcomes: Allows early weight-bearing but associated with higher complication rates, particularly dislocation 2.Postoperative Care
Rehabilitation: Gradual weight-bearing as tolerated, physical therapy to restore mobility and strength.
Monitoring: Regular follow-up for radiographic assessment of fracture healing, functional recovery, and complication surveillance.
Prevention: Prophylactic measures against DVT, pressure sores, and pulmonary complications.Contraindications:
Severe comorbidities precluding surgery.
Extensive soft tissue damage making fixation difficult.Complications
Acute Complications:
- Nail Cut-out/Back-out: Requires revision surgery.
- Deep Vein Thrombosis (DVT): Prophylactic anticoagulation is essential.
- Pulmonary Embolism: Early mobilization and DVT prophylaxis mitigate risk.
Long-term Complications:
- Coxa Vara: Indicative of malunion, requiring corrective surgery.
- Nonunion or Malunion: Regular radiographic follow-up crucial for early detection and management.
- Infection: Requires prompt antibiotic therapy and surgical intervention if necessary.Prognosis & Follow-up
The prognosis for intertrochanteric fractures varies based on patient age, fracture stability, and surgical outcomes. Key prognostic indicators include:
Functional Recovery: Early mobilization and effective surgical stabilization positively influence recovery.
Fracture Healing Time: Typically ranges from 3 to 6 months, with full recovery taking up to a year.
Follow-up Intervals: Initial follow-up at 2 weeks, 4 weeks, 3 months, 6 months, and annually thereafter to monitor healing and functional status 13.Special Populations
Elderly Patients: Higher risk of complications; careful surgical planning and multidisciplinary care essential.
Comorbidities: Patients with osteoporosis, diabetes, and renal impairment require tailored surgical and postoperative management strategies 12.Key Recommendations
Early Surgical Intervention: Initiate surgical treatment within 24-48 hours to reduce complications and mortality risk (Evidence: Strong 5).
Use of Advanced Implants: Prefer PFBNs for their superior stability and reduced complication rates compared to traditional PFNA (Evidence: Moderate 1011).
Comprehensive Postoperative Care: Include early mobilization, DVT prophylaxis, and regular follow-up to monitor healing and functional recovery (Evidence: Moderate 6).
Consider Hemiarthroplasty for Unstable Fractures: In cases where internal fixation is challenging, cemented bipolar hemiarthroplasty can be a viable option despite higher complication rates (Evidence: Moderate 2).
Multidisciplinary Approach: Involve orthopedic surgeons, geriatricians, and physiotherapists to optimize patient outcomes (Evidence: Expert opinion).
Radiographic Monitoring: Regular X-rays and CT scans to assess fracture healing and detect complications early (Evidence: Moderate 3).
Patient Education: Educate patients on the importance of adherence to rehabilitation protocols and signs of complications (Evidence: Expert opinion).
Risk Factor Management: Address underlying osteoporosis and other risk factors post-surgery to prevent future fractures (Evidence: Moderate 1).
Avoid Delayed Surgery: Delay in surgical intervention increases the risk of complications and mortality (Evidence: Strong 5).
Customized Rehabilitation Plans: Tailor rehabilitation programs based on patient’s functional status and comorbidities (Evidence: Moderate 6).References
1 Duan W, Liang H, Fan X, Zhou D, Wang Y, Zhang H. Research Progress on the Treatment of Geriatric Intertrochanteric Femur Fractures with Proximal Femur Bionic Nails (PFBNs). Orthopaedic surgery 2024. link
2 Rajput IM, Memon I, Azam ME, Siddiqui AA, Kumar J, Ali Z et al.. Is Cemented Bipolar Hemiarthroplasty Good Choice For Unstable Intertrochanteric Fractures In Elderly: Multicentric Prospective Study At Karachi. Journal of Ayub Medical College, Abbottabad : JAMC 2022. link
3 Duramaz A, İlter MH. The impact of proximal femoral nail type on clinical and radiological outcomes in the treatment of intertrochanteric femur fractures: a comparative study. European journal of orthopaedic surgery & traumatology : orthopedie traumatologie 2019. link
4 Berend KR, Hanna J, Smith TM, Mallory TH, Lombardi AV. Acute hip arthroplasty for the treatment of intertrochanteric fractures in the elderly. Journal of surgical orthopaedic advances 2005. link