Video Summary
Femoral neck fractures arise from low-energy falls in the elderly or high-energy trauma in younger patients; insufficiency and stress fractures require special evaluation.
Garden (displacement) and Pauwels (fracture angle) classifications guide prognosis and fixation strategy — more vertical or displaced fractures have higher risk of AVN and nonunion.
Early fixation (ideally within 48 hours after stabilization) improves outcomes; fixation for nondisplaced fractures typically uses three parallel cancellous screws.
Screw placement must avoid posterior-superior trajectory to preserve femoral head blood supply; tip-apex distance and lateral cortex integrity predict implant failure.
Displaced fractures in active elderly often do better with arthroplasty (total hip replacement) while unstable or reverse-pattern intertrochanteric fractures need alternative fixation methods.
They result from low-energy falls in the elderly, high-energy trauma (falls, MVAs) in any age, insufficiency fractures from osteoporosis/osteopenia, and stress fractures from overuse in athletes.
Garden classifies fractures by displacement (risk of vascular disruption) while Pauwels classifies by fracture angle (biomechanical stability); more displacement or verticality increases risk of AVN and nonunion and often dictates more aggressive fixation or arthroplasty.
After medical stabilization, earlier surgery—ideally within 48 hours—is associated with better outcomes; urgent fixation is particularly important in young patients to decompress vessels and reduce AVN risk.
Use three parallel cancellous screws in an inverted triangular pattern, placed about 5 mm from the articular cartilage with the inferior screw within ~3 mm of the cortex and threads crossing the fracture site for optimal stability.
In active elderly patients with displaced femoral neck fractures, total hip replacement often provides better function, though it carries higher dislocation risk and requires consideration of surgical approach.
"A femoral neck fracture can occur as a result of low-energy trauma in the elderly, or high-energy trauma such as falls or motor vehicle accidents in both young and elderly patients."
Femoral neck fractures can result from low-energy trauma, commonly seen in older individuals, or from high-energy incidents like falls or accidents that can affect both the elderly and younger populations.
In cases of low-energy trauma, medical consultation is essential, while high-energy trauma often requires adhering to the Advanced Trauma Life Support (ATLS) protocol.
Insufficiency fractures may arise from weak bone conditions, such as osteoporosis or osteopenia, leading to persistent pain, particularly during axial compression. An X-ray may not always reveal these fractures, hence necessitating further diagnostic evaluations.
"The Garden classification categorizes fractures according to the amount or degree of displacement, correlating it with the risk of vascular disruption."
The classification of femoral neck fractures can be divided into two main systems: the Garden and the Pauwels classification.
Garden classification breaks down fractures into two broad categories: undisplaced (Type 1 and Type 2) and displaced (Type 3 and Type 4).
Types in the Garden classification emphasize the degree of displacement and the linked risk of vascular compromise, impacting treatment and outcomes.
"The Pauwels classification categorizes fractures based on the orientation and direction of the fracture line in relation to the femoral neck."
Pauwels classification categorizes femoral neck fractures into three types based on the angulation of the fracture line: Type 1 (less than 30°), Type 2 (30° to 50°), and Type 3 (greater than 50°).
Increased verticality of the fracture line corresponds with greater shear forces, leading to higher complications and instability.
Horizontal fractures are considered more stable, while vertical fractures are less stable and can lead to complications like disrupted blood supply, avascular necrosis, and nonunion.
"The optimal timing for surgery is after medical stabilization, with improved outcomes when performed within 48 hours."
The urgency of surgical intervention is paramount, especially in young patients, as timely treatment can significantly enhance recovery prospects.
Operations should prioritally address any potential complications from both displaced and non-displaced fractures to prevent further issues down the line.
Comorbidities in patients can also raise the mortality risk, particularly when surgery is delayed beyond four days.
"For non-displaced fractures, surgical fixation is crucial to prevent displacement."
In instances of femoral neck fractures, screws are typically placed in an inverted triangular pattern for optimal stability.
Displaced fractures may require either close or open reduction to restore an atomic alignment that ensures proper healing.
Surgical techniques, such as the Smith-Petersen and Watson-Jones approaches, provide pathways to effectively address femoral neck fractures while minimizing the risk of nerve injury.
"The sooner the fixation, the better the result when we talk about screws for femoral neck fractures."
The timing of fixation significantly impacts patient outcomes; quicker intervention leads to improved results following femoral neck fracture.
For optimal screw placement, it is recommended to use three parallel cancellous screws, inserted 5 mm from the articular cartilage.
The inferior screw should be positioned within 3 mm of the cortex, while both posterior screws also require the same proximity to ensure stability.
"Avoid posterior-superior positioning of screws to prevent injury to the blood supply of the head."
Proper screw positioning is crucial to prevent the risk of complications, particularly damage to the blood supply in the hip.
The screw threads should ideally cross the fracture site and be positioned above the lesser trochanter to prevent additional fractures below the fixation.
In cases of comminuted neck fractures, an additional screw is necessary to ensure proper fixation.
"Treatment for displaced fractures in active elderly patients typically involves total hip replacement for better function."
Total hip replacement is often advisable for active elderly patients with displaced fractures as it yields better functional outcomes, albeit with an increased risk of dislocation.
The choice of surgical approach—posterior or anterior—must be considered, as each presents distinct risks, such as potential muscle weakness or higher dislocation rates.
In patients with severe osteoporosis or significant fractures, the surgical focus shifts to maintaining alignment and stability of the fracture.
"Deep vein thrombosis can occur in about 80% of hip fracture patients, making prophylaxis essential."
Hip fracture patients face risks of deep vein thrombosis (DVT), necessitating both chemical and mechanical prophylaxis.
Healthcare providers should prioritize mobilizing patients—encouraging weightbearing as tolerated—to facilitate natural regulation of circulation.
Pre-existing health conditions in elderly patients must be evaluated as ASA classifications of 3 and 4 are associated with increased mortality rates.
"For nonunion cases, techniques such as osteotomy can alter fracture orientation from vertical to more favorable horizontal alignment."
In situations where fractures do not unite properly, surgical options like osteotomy can be utilized to change the biomechanical alignment of the fracture, enhancing healing chances.
Comprehension of fracture types, such as intertrochanteric fractures, is essential, with attention to the underlying bone response to stress being a crucial element of treatment planning.
Complications related to implant failure can occur predominantly within the first three months post-surgery, especially if the tip-apex distance exceeds critical measurements.
"Dynamic hip screws are not suitable for reverse patterns of fractures because they lead to major displacement and nonunion."
It is important to choose the proper method of fixation based on fracture type; while stable fractures may benefit from sliding hip screws, reverse fractures typically require alternative methods to prevent failure.
Monitoring the integrity of the lateral femoral cortex is important, as its compromise influences the treatment strategy and the risk of fracture collapse.
Patients typically need comprehensive evaluation for osteoporosis, and vitamin D and calcium supplementation should be considered for optimal recovery.
