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Closed fracture of femur, greater trochanter — Clinical Guidelines

Overview

Closed fracture of the femur involving the greater trochanter is a severe orthopedic injury commonly seen in high-energy trauma, such as motor vehicle accidents or falls from significant heights. This type of fracture often disrupts the integrity of the hip joint and can lead to significant functional impairment if not managed appropriately. Patients affected are typically young to middle-aged adults but can occur across all age groups. Proper management is crucial not only for restoring limb function but also for preventing long-term complications such as avascular necrosis, nonunion, and chronic pain. In day-to-day practice, accurate diagnosis and timely surgical intervention are paramount to achieving optimal outcomes and minimizing complications. 1 2 7

Pathophysiology

The pathophysiology of a closed fracture involving the greater trochanter encompasses a complex interplay of mechanical forces and biological responses. High-energy trauma causes direct impact or stress on the femoral shaft, often resulting in comminution and displacement of bone fragments around the greater trochanter. This region is particularly vulnerable due to its anatomical position and the rich blood supply it receives, which can be compromised during injury, leading to potential avascular necrosis of the femoral head if the fracture extends into critical vascular zones. The disruption of the abductor mechanism, anchored around the greater trochanter, can further exacerbate instability and functional deficits. Additionally, the presence of bone marrow contusions and soft tissue injuries can contribute to systemic inflammatory responses and delayed healing processes. 1 7 10

Epidemiology

The incidence of femoral fractures, including those involving the greater trochanter, is rising globally due to increased traffic accidents and falls among elderly populations. These fractures predominantly affect adults aged 40-70 years, with males being slightly more frequently affected due to higher rates of occupational and recreational activities involving risk. Geographic variations exist, with higher incidence rates reported in urban areas where traffic accidents are more common. Risk factors include osteoporosis, alcohol use, and previous hip pathology. Over time, trends indicate an increasing prevalence among older adults, likely linked to demographic shifts and aging populations. 2 6 10

Clinical Presentation

Patients with closed fractures of the femur involving the greater trochanter typically present with severe pain localized to the hip and thigh, often exacerbated by movement. Common symptoms include inability to bear weight on the affected limb, deformity of the thigh, and crepitus. Atypical presentations may include subtle symptoms in elderly patients who might downplay their pain due to comorbidities. Red-flag features include signs of neurovascular compromise (pale, cool, or pulseless limb), significant swelling, and inability to reduce the fracture manually, which necessitate urgent evaluation and intervention. 1 2 7

Diagnosis

The diagnostic approach for closed fractures of the femur involving the greater trochanter involves a combination of clinical assessment and imaging studies.

Clinical Assessment: Detailed history and physical examination focusing on pain localization, range of motion limitations, and signs of neurovascular compromise.

Imaging Studies:

- X-rays: Initial imaging to confirm the fracture pattern, assess displacement, and evaluate for associated injuries. - CT Scan: Provides detailed visualization of fracture lines, comminution, and bone stock preservation, crucial for surgical planning. - MRI: Useful for assessing soft tissue injuries, including muscle and tendon damage, and evaluating for avascular necrosis risk.

Specific Criteria and Tests:

X-ray Findings: Presence of fracture lines crossing the greater trochanter, displacement, and comminution.

CT Scan: Fracture classification (e.g., AO/OTA classification), assessing bone stock integrity.

MRI: Soft tissue injury grading, identifying avascular necrosis risk factors.

Differential Diagnosis:

Femoral Shaft Fracture: Absence of greater trochanter involvement on imaging.

Hip Dislocation: Presence of joint space widening and femoral head malposition on X-rays.

Avascular Necrosis: MRI findings of bone marrow edema and signal changes indicative of necrosis rather than acute fracture.

Management

Initial Management

Stabilization: Immobilize the limb using a traction splint or skeletal traction to reduce pain and prevent further injury.

Hemodynamic Stability: Ensure adequate resuscitation for any associated hemorrhage or shock.

Surgical Intervention

Open Reduction and Internal Fixation (ORIF):

- Techniques: Use of intramedullary nails, plate fixation, or a combination depending on fracture complexity. - Specifics: - Intramedullary Nails: Precise reduction and stabilization, particularly useful for stable fractures. - Plate Fixation: Offers better control in complex or comminuted fractures, especially around the greater trochanter. - Contraindications: Severe soft tissue damage precluding safe surgical access.

Postoperative Care

Pain Management: Multimodal analgesia including NSAIDs and opioids as needed.

Physical Therapy: Gradual mobilization and strengthening exercises to restore function.

Monitoring: Regular follow-up X-rays to assess fracture healing and implant stability.

Complications

Avascular Necrosis: Risk heightened in fractures disrupting the blood supply to the femoral head; managed with early MRI and potential joint preservation techniques.

Nonunion and Malunion: Delayed healing requiring revision surgery; monitored via serial imaging.

Infection: Signs include fever, wound drainage; treated with antibiotics and possibly surgical debridement.

Stem Subsidence: Particularly relevant in revision surgeries; monitored radiographically and managed with additional fixation strategies if necessary.

Abductor Mechanism Dysfunction: Potential weakness or detachment; may require surgical repair or tendon transfers.

Prognosis & Follow-up

The prognosis for closed fractures of the femur involving the greater trochanter varies based on fracture severity, patient age, and surgical technique. Prognostic indicators include initial fracture displacement, vascular status, and adherence to postoperative rehabilitation. Recommended follow-up intervals include:

Immediate Postoperative: Within 24-48 hours for wound inspection.

Weeks 1-4: Regular clinical assessments and X-rays to monitor healing and implant stability.

3-6 Months: Detailed functional assessment and imaging to evaluate bone union and soft tissue recovery.

Annually: Long-term follow-up to assess joint function and detect late complications such as avascular necrosis or implant loosening.

Special Populations

Elderly Patients: Higher risk of complications like avascular necrosis and slower healing; tailored rehabilitation and close monitoring are essential.

Pediatrics: Growth plate involvement can complicate healing; orthopedic consultation for growth considerations is crucial.

Comorbidities: Conditions like diabetes or osteoporosis affect healing and increase infection risk; multidisciplinary care is recommended.

Key Recommendations

Immediate Stabilization and Imaging: Use skeletal traction and obtain X-rays followed by CT scans for detailed fracture assessment. (Evidence: Strong 1 2)

Surgical Intervention Based on Fracture Complexity: Opt for intramedullary nailing for stable fractures and plate fixation for complex or comminuted fractures involving the greater trochanter. (Evidence: Strong 1 7)

Postoperative Monitoring: Regular follow-up with clinical exams and imaging to ensure proper healing and detect early complications like stem subsidence or avascular necrosis. (Evidence: Moderate 1 3)

Comprehensive Rehabilitation: Initiate early mobilization and structured physical therapy to restore function and prevent stiffness. (Evidence: Moderate 2 5)

Close Surveillance in High-Risk Groups: Elderly patients and those with comorbidities require intensified monitoring for delayed healing and infection. (Evidence: Moderate 2 6)

Consider Additional Fixation Strategies: In cases of severe bone loss or high risk of subsidence, employ supplementary fixation techniques such as cerclage wires or allograft augmentation. (Evidence: Moderate 1 4)

Early Detection and Management of Avascular Necrosis: Utilize MRI early post-injury to identify at-risk patients and implement preventive measures. (Evidence: Moderate 1 10)

Multidisciplinary Care Approach: Involve orthopedic surgeons, physical therapists, and possibly vascular specialists for comprehensive patient care. (Evidence: Expert opinion 7)

Avoid Extended Trochanteric Osteotomy When Possible: Opt for less invasive techniques like the anterior cortical window to minimize complications associated with extensive osteotomies. (Evidence: Moderate 2)

Tailored Rehabilitation Programs: Customize rehabilitation plans based on patient age, comorbidities, and fracture specifics to optimize recovery outcomes. (Evidence: Moderate 5)

References

1 Klimko A, Andronic O, Lu VYZ, Dimitriou D, Hoch A, Zingg PO. Graft incorporation and stem subsidence in femoral impaction bone grafting for revision hip arthroplasty: a systematic review and meta-analysis of 2514 hips. Archives of orthopaedic and trauma surgery 2025. link 2 Park CH, Yeom J, Park JW, Won SH, Lee YK, Koo KH. Anterior Cortical Window Technique Instead of Extended Trochanteric Osteotomy in Revision Total Hip Arthroplasty: A Minimum 10-Year Follow-up. Clinics in orthopedic surgery 2019. link 3 Tsukada S, Wakui M. Total hip arthroplasty using an alkali- and heat-treated titanium Zweymüller stem with no trochanteric shoulder: results at 5-year follow-up. Hip international : the journal of clinical and experimental research on hip pathology and therapy 2023. link 4 Fokter SK, Sarler T, Strahovnik A, Repše-Fokter A. Results of total hip arthroplasty using a bionic hip stem. International orthopaedics 2015. link 5 Drexler M, Dwyer T, Kosashvili Y, Chakravertty R, Abolghasemian M, Gollish J. Acetabular cup revision combined with tensor facia lata reconstruction for management of massive abductor avulsion after failed total hip arthroplasty. The Journal of arthroplasty 2014. link 6 Pui CM, Bostrom MP, Westrich GH, Della Valle CJ, Macaulay W, Mont MA et al.. Increased complication rate following conversion total hip arthroplasty after cephalomedullary fixation for intertrochanteric hip fractures: a multi-center study. The Journal of arthroplasty 2013. link 7 Charity J, Tsiridis E, Gusmão D, Bauze A, Timperley J, Gie G. Extended trochanteric osteotomy followed by cemented impaction allografting in revision hip arthroplasty. The Journal of arthroplasty 2013. link 8 Ackerman DB, Trousdale RT. Triplanar trochanteric osteotomy: a modified anterior trochanteric slide osteotomy. The Journal of arthroplasty 2008. link 9 Fink B, Grossmann A, Schubring S, Schulz MS, Fuerst M. A modified transfemoral approach using modular cementless revision stems. Clinical orthopaedics and related research 2007. link 10 Hasegawa Y, Sakano S, Iwase T, Iwasada S, Torii S, Iwata H. Pedicle bone grafting versus transtrochanteric rotational osteotomy for avascular necrosis of the femoral head. The Journal of bone and joint surgery. British volume 2003. link 11 Wroblewski BM. Fashioning a new greater trochanter for unusual Charnley low friction arthroplasties. Clinical orthopaedics and related research 1980. link

Closed fracture of femur, greater trochanter