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Fracture of neck of femur — Clinical Guidelines

Overview

Femoral neck fractures (FNF) are debilitating injuries commonly affecting elderly individuals, often resulting from falls and osteoporosis. These fractures significantly impact longevity and quality of life, with reported 30-day mortality rates ranging from 3% to 10% and 1-year mortality rates reaching up to 30% 1. Approximately one-quarter of patients require long-term care post-fracture, and half struggle to regain pre-fracture independence 4. Given the aging global population, the incidence of FNFs is projected to rise dramatically, reaching an estimated 6.3 million cases by 2050 5. Early and appropriate management is crucial in mitigating these adverse outcomes, making the timely and accurate diagnosis and treatment of FNFs essential in day-to-day clinical practice.

Pathophysiology

Femoral neck fractures arise primarily from high-energy trauma or low-energy injuries in osteoporotic bone, leading to disruption of the blood supply to the femoral head. This disruption can result in avascular necrosis (AVN) of the femoral head, a critical complication that significantly affects long-term outcomes 6 7. The severity of AVN depends on the extent of injury to the vascular supply, particularly the medial circumflex femoral artery and the retinacular vessels. Additionally, sarcopenia, characterized by progressive loss of muscle mass and strength, exacerbates the risk of falls and fractures, further complicating recovery and rehabilitation 8 9. Post-fracture immobilization and surgical interventions can also contribute to muscle atrophy and functional decline, highlighting the multifaceted nature of these injuries.

Epidemiology

Femoral neck fractures predominantly affect individuals over 65 years of age, with the incidence doubling every decade after 50 5. The gender distribution typically shows a higher prevalence in women due to postmenopausal osteoporosis 1. Globally, the incidence is projected to increase significantly with population aging, with estimates suggesting a substantial rise in cases over the next few decades 5. Risk factors include osteoporosis, falls, and comorbidities such as sarcopenia, which collectively contribute to the vulnerability of elderly patients 8 15. Geographic variations exist, influenced by lifestyle, healthcare access, and socioeconomic factors, though comprehensive global data consistently highlight the growing burden of these fractures.

Clinical Presentation

Patients with femoral neck fractures often present with severe pain in the groin, hip, or knee, depending on the fracture location 1. Common symptoms include inability to bear weight on the affected limb, shortening and rotation of the limb (Trendelenburg sign), and limited range of motion. Atypical presentations may include referred pain or subtle symptoms in patients with cognitive impairment. Red-flag features include rapid onset of neurological deficits, significant swelling, or signs of systemic infection, which necessitate urgent evaluation to rule out complications such as compartment syndrome or deep vein thrombosis 1 6.

Diagnosis

The diagnosis of femoral neck fractures typically begins with a thorough clinical evaluation followed by imaging studies. Diagnostic Approach:

Clinical Assessment: Focus on pain localization, gait abnormalities, and functional limitations.

Imaging: X-rays are the initial imaging modality, often revealing the fracture line. Advanced imaging like MRI or CT may be necessary for complex cases or to assess soft tissue injuries 1 6.

Specific Criteria and Tests:

X-ray Findings: Identification of fracture line in the femoral neck, often with associated hip joint displacement.

MRI/CT: Used for detailed assessment of fracture morphology, vascular status, and soft tissue involvement when X-rays are inconclusive.

Differential Diagnosis:

- Avascular Necrosis (AVN): Typically diagnosed via MRI showing characteristic bone marrow changes. - Hip Dislocation: X-rays showing abnormal joint alignment. - Trochanteric Fractures: Distinct fracture patterns involving the greater trochanter, visible on X-rays 1 6.

Management

Initial Management

Pain Control: Administer analgesics (e.g., opioids, NSAIDs) to manage pain effectively 1.

Immobilization: Use skeletal traction or a hip spica cast to stabilize the fracture site 1.

Surgical Intervention

Total Hip Arthroplasty (THA): Recommended for independently mobile patients with few comorbidities 7 8.

- Indications: Younger patients with good bone quality and no significant cognitive impairment. - Considerations: Longer operative time, increased risk of dislocation. - Timing: Ideally within 24-48 hours post-injury to minimize complications 5.

Hemiarthroplasty (HA): Suitable for patients with higher risk profiles or those requiring quicker recovery.

- Indications: Elderly patients with significant comorbidities or those at higher risk for THA complications. - Considerations: Higher revision rates due to acetabular erosion. - Operative Time: Optimal operation time <86 minutes to reduce complication rates 2 3.

Specifics:

THA:

- Procedure: Cementless THA with appropriate prosthetic selection. - Monitoring: Postoperative infection, dislocation, and functional recovery.

HA:

- Procedure: Hemiarthroplasty with cemented or cementless fixation. - Monitoring: Early mobilization, pain management, and signs of AVN.

Postoperative Care

Rehabilitation: Early mobilization and physical therapy to prevent complications like deep vein thrombosis and muscle atrophy 1 8.

Monitoring: Regular follow-up for functional outcomes, pain levels, and signs of complications such as infection or dislocation 7.

Complications

Avascular Necrosis (AVN): Risk increases with delayed surgery and displacement; managed with close monitoring and potential revision surgery 6 7.

Dislocation: More common in THA; managed with prompt reduction and immobilization 7.

Infection: Requires early detection and aggressive antibiotic therapy 1.

Nonunion/Malunion: Managed surgically if functional impairment occurs 6.

Referral Triggers: Persistent pain, functional decline, signs of infection, or suspicion of AVN warrant specialist referral 1 7.

Prognosis & Follow-up

The prognosis for patients with femoral neck fractures varies based on factors such as age, comorbidities, and surgical outcomes. Key prognostic indicators include:

Operative Timing: Early surgery correlates with better outcomes.

Type of Surgery: THA generally offers better functional outcomes compared to HA.

Patient Mobility Post-Surgery: Early mobilization predicts better recovery.

Follow-up Intervals:

Immediate Postoperative: Daily for the first week.

Short-term (1-3 months): Weekly to monthly visits.

Long-term (6-12 months): Every 3-6 months to monitor recovery and address any complications 1 7.

Special Populations

Elderly Patients

Considerations: Higher risk of complications, slower recovery; tailored rehabilitation and close monitoring essential 1 7.

Management: Prioritize early surgical intervention and comprehensive geriatric assessment 1.

Pediatric Patients (Delbet IV Fractures)

Treatment: Titanium elastic nailing (TEN) is effective in children aged 6-10 years, minimizing periosteal damage and reducing AVN risk 4.

Outcome: Favorable results with TEN compared to cannulated screws, though long-term follow-up is crucial 4.

Patients with Sarcopenia

Preoperative Assessment: Evaluate muscle mass and strength to guide surgical approach and postoperative rehabilitation 1 8.

Management: Integrate muscle-strengthening exercises into rehabilitation plans to mitigate muscle loss post-fracture 8.

Key Recommendations

Early Surgical Intervention: Perform surgery within 24-48 hours post-fracture to minimize complications (Evidence: Strong 1 5).

Choice of Arthroplasty: Select THA for independently mobile patients with fewer comorbidities; consider HA for higher-risk profiles (Evidence: Moderate 7 8).

Optimize Operative Time: Aim for surgical duration <86 minutes to reduce complication rates (Evidence: Moderate 2 3).

Comprehensive Postoperative Care: Include early mobilization and close monitoring for infection, dislocation, and AVN (Evidence: Moderate 1 7).

Tailored Rehabilitation: Implement individualized rehabilitation plans, especially for elderly and sarcopenic patients (Evidence: Expert opinion 8).

Regular Follow-up: Schedule frequent follow-up visits to assess functional recovery and address complications promptly (Evidence: Moderate 1 7).

Pediatric Fractures: Use titanium elastic nailing for Delbet IV fractures in children aged 6-10 years to minimize complications (Evidence: Moderate 4).

Geriatric Assessment: Conduct comprehensive geriatric evaluations to guide perioperative management in elderly patients (Evidence: Expert opinion 1).

Monitor Muscle Health: Assess and manage sarcopenia preoperatively to improve postoperative outcomes (Evidence: Moderate 8).

Risk Stratification: Stratify patients based on comorbidities and functional status to tailor surgical and rehabilitation strategies (Evidence: Moderate 7).

References

1 Yin Z, Zhu Z, Wang C, Jia X, Zou X. Comparison of the surgical efficacy of total hip replacement versus hemiarthroplasty in the treatment of femoral neck fractures in elderly patients with sarcopenia. PloS one 2025. link 2 Vaishya R, Vaish A. The influence of operation time for hip hemiarthroplasty on complication rates and mortality in patients with femoral neck fracture: a retrospective data analysis. Journal of orthopaedic surgery and research 2024. link 3 Ramadanov N, Salzmann M, Voss M, Hable R, Hakam HT, Prill R et al.. The influence of operation time for hip hemiarthroplasty on complication rates and mortality in patients with femoral neck fracture: a retrospective data analysis. Journal of orthopaedic surgery and research 2024. link 4 Zhu D, Xu X, Zhang M, Wang T. Titanium elastic nailing can be used in 6 to 10 years old pediatric with Delbet IV femoral neck fractures. Medicine 2021. link 5 Craik J, Geleit R, Hiddema J, Bray E, Hampton R, Railton G et al.. The effect of time to surgery on outcomes and complication rates following total hip arthroplasty for fractured neck of femur. Annals of the Royal College of Surgeons of England 2019. link 6 Gumustas S, Tosun HB, Isyar M, Serbest S, Oznam K, Bulut G. Femur neck fracture in young adults, is it really an urgent surgery indication: retrospective clinical study. The Pan African medical journal 2018. link 7 Barışhan FC, Akesen B, Atıcı T, Durak K, Bilgen MS. Comparison of hemiarthroplasty and total hip arthroplasty in elderly patients with displaced femoral neck fractures. The Journal of international medical research 2018. link 8 Wang Z, Bhattacharyya T. Outcomes of Hemiarthroplasty and Total Hip Arthroplasty for Femoral Neck Fracture: A Medicare Cohort Study. Journal of orthopaedic trauma 2017. link 9 Mellner C, Eisler T, Börsbo J, Brodén C, Morberg P, Mukka S. The Sernbo score predicts 1-year mortality after displaced femoral neck fractures treated with a hip arthroplasty. Acta orthopaedica 2017. link 10 Sheikh HQ, Hossain FS, Aqil A, Akinbamijo B, Mushtaq V, Kapoor H. A Comprehensive Analysis of the Causes and Predictors of 30-Day Mortality Following Hip Fracture Surgery. Clinics in orthopedic surgery 2017. link 11 Chammout G, Muren O, Bodén H, Salemyr M, Sköldenberg O. Cemented compared to uncemented femoral stems in total hip replacement for displaced femoral neck fractures in the elderly: study protocol for a single-blinded, randomized controlled trial (CHANCE-trial). BMC musculoskeletal disorders 2016. link 12 Lin JC, Liang WM. Outcomes after fixation for undisplaced femoral neck fracture compared to hemiarthroplasty for displaced femoral neck fracture among the elderly. BMC musculoskeletal disorders 2015. link 13 Valaviciene R, Macijauskiene J, Tarasevicius S, Smailys A, Dobozinskas P, Hommel A. Femoral neck fractures in Lithuania and Sweden. The differences in care and outcome. International orthopaedics 2012. link 14 Gómez-Palomo JM, Martínez-Crespo A, Passini-Sánchez J, Ignatyev-Simonov N, Zamora-Navas P, Guerado E. Quality of life and cost-utility analysis in patients with femoral neck fracture: a propensity score matching study comparing monopolar hemiarthroplasty and total hip arthroplasty. Quality of life research : an international journal of quality of life aspects of treatment, care and rehabilitation 2025. link 15 Kulkarni GS, Kulkarni S, Malve S, Kulkarni V, Kulkarni M, Kulkarni S et al.. Pilot study of three novel implants-GSK triangular system, locking hip screw and controlled sliding dynamic hip screw, for fixation of fracture of the neck of femur. Injury 2024. link 16 Quinlan ND, Hogarth DA, Chen DQ, Werner BC, Browne JA. Hospital and Surgeon Reimbursement Trends for Femoral Neck Fractures Treated With Hip Hemiarthroplasty and Total Hip Arthroplasty. The Journal of arthroplasty 2020. link 17 Cooper HJ, Olswing AD, Berliner ZP, Scuderi GR, Brown ZJ, Hepinstall MS. Variation in Treatment Patterns Correlate With Resource Utilization in the 30-Day Episode of Care of Displaced Femoral Neck Fractures. The Journal of arthroplasty 2018. link 18 Hongisto MT, Nuotio MS, Luukkaala T, Väistö O, Pihlajamäki HK. Lateral and Posterior Approaches in Hemiarthroplasty. Scandinavian journal of surgery : SJS : official organ for the Finnish Surgical Society and the Scandinavian Surgical Society 2018. link 19 Florschutz AV, Langford JR, Haidukewych GJ, Koval KJ. Femoral neck fractures: current management. Journal of orthopaedic trauma 2015. link 20 Mishra AK, Chalise PK, Shah SB, Adhikari V, Singh RP. Comparative study in surgical outcome of intracapsular fracture neck of femur in active elderly patients treated with hemiarthroplasty with Austin Moore's and bipolar prosthesis. Nepal Medical College journal : NMCJ 2013. link 21 Liao L, Zhao Jm, Su W, Ding Xf, Chen Lj, Luo Sx. A meta-analysis of total hip arthroplasty and hemiarthroplasty outcomes for displaced femoral neck fractures. Archives of orthopaedic and trauma surgery 2012. link 22 Alazzawi S, Mayahi R, Parker MJ. Effect of body weight on the outcome of displaced intracapsular fracture neck of femur treated by internal fixation; a clinical study of 198 patients. Hip international : the journal of clinical and experimental research on hip pathology and therapy 2011. link 23 Inan U, Ozateş N, Omeroğlu H. Early clinical results of cementless, bipolar hemiarthroplasty in intracapsular femur neck fractures. Eklem hastaliklari ve cerrahisi = Joint diseases & related surgery 2011. link 24 Raaymakers EL. Fractures of the femoral neck: a review and personal statement. Acta chirurgiae orthopaedicae et traumatologiae Cechoslovaca 2006. link 25 Morsy HA. Complications of fracture of the neck of the femur in children. A long-term follow-up study. Injury 2001. link00109-1)

Fracture of neck of femur