Femur Fracture
The femur is the body’s largest and strongest bone, but breaking it requires significant force and is always a serious injury needing immediate care. The two main types are femoral shaft fractures, occurring in the middle of the bone, and distal femur fractures, just above the knee.
Shaft fractures usually result from high-energy trauma like car accidents or major falls, though older adults with osteoporosis can sustain them from minor incidents. Distal fractures are more common in older adults from simple falls, while in younger patients they typically involve high-impact trauma. These can be more complex since they often extend into the knee joint and affect long-term function.
Symptoms are severe and immediate, including intense thigh pain, rapid swelling, deformity, and inability to bear weight. Femur fractures can also cause significant internal bleeding, sometimes up to two liters, making urgent evaluation critical. Prompt treatment can greatly improve outcomes.
Treatment
Nearly all femur fractures require surgery. For femoral shaft fractures, intramedullary nailing is the gold standard and what I use in my practice. This involves inserting a metal nail through the top of the femur down through the center of the bone, and then securing it with screws. The beauty of this technique is that it provides excellent stability and allows you to start bearing weight relatively quickly, which helps with recovery and prevents complications from prolonged immobility.
For distal femur fractures, the approach depends on the specific pattern. When the joint surface is involved, I use open reduction and internal fixation—that means I make an incision to see the fracture directly, line up the bone fragments anatomically, and secure them with a plate and screws. For simpler distal fractures, a retrograde intramedullary nail inserted through the knee can work well.
Periprosthetic fractures—those occurring around a knee replacement—are especially complex and sometimes require revision of the knee implant itself. My goal in all of these is the same: get the joint surface perfectly aligned, achieve stable fixation, and enable early motion to preserve knee function.
Recovery Timeline
- Pain control and swelling management
- Begin gentle movement of hip and knee
- Start physical therapy early
- Limited or assisted weight-bearing (crutches or walker)
- Gradual increase in range of motion
- Continue physical therapy
- Begin partial weight-bearing as tolerated, depending on fracture stability
- Progress weight-bearing, often moving toward full weight-bearing for shaft fractures
- Improved mobility and strength
- Distal fractures may still require protection
- Continued strengthening and mobility work
- Most fractures achieve solid bone healing
- Return to normal daily activities increases
- Return to sports and higher-level activities
- Ongoing strength and conditioning
- Outcomes generally excellent, though distal fractures may take longer
- Hardware typically remains in place permanently
- Full function expected in most patients
- Recovery may vary based on fracture severity and joint involvement
Common Femur Fracture Questions
Injury Information
A: Elderly patients do well when we treat fractures operatively and get them moving early—this actually prevents many of the complications that come from prolonged immobility. The key is careful preoperative medical clearance and aggressive rehabilitation afterward.
A: Most femur fractures achieve solid bony union within three to six months. The timeline depends on factors like your age, bone quality, smoking status, and whether the fracture was open or closed. Young healthy patients tend to heal faster than elderly patients with osteoporosis, but three to six months is a good general expectation.
A: These are fractures that occur around a knee replacement or hip replacement implant, and yes, they’re more complex. We have to achieve fixation while respecting the existing implant, and sometimes we need to revise or replace the knee prosthesis itself. These require careful planning and specialized expertise, which is something I handle regularly.
A: Nearly always, yes. The femur is too important for load-bearing to treat non-surgically in adults. Surgery gives you the best chance for solid healing and the ability to move and bear weight safely. There are rare exceptions for very elderly or medically fragile patients, but I always work to get people to the operating room.
Surgery Information
A: The most common complications are malunion (the bone heals in a slightly wrong position) and non-union (the bone doesn’t heal completely), both of which are rare with modern nailing techniques. Infection is always a concern with surgery, especially with open fractures. Stiffness of the hip or knee can happen if you don’t do your physical therapy, which is why early motion is so important.
A: Femur fractures can cause significant internal bleeding—sometimes a liter or more into the thigh. Depending on your initial blood count and overall health, you may or may not need a transfusion. We monitor this closely in the hospital and manage it appropriately. Severe fractures or multiple injuries increase the likelihood of transfusion.
A: The nail is inserted through the top of the femur and travels down the center of the bone, providing excellent stability from within. It allows you to bear weight sooner and move your joints early, which is crucial for avoiding stiffness and getting you back to function faster than older plate-and-screw techniques.
Post-Op Recovery
A: Hardware removal is less commonly needed for femur fractures than for many other fracture sites. In most cases, you can leave the nail and screws in place permanently without any problems. Removal is only considered if the hardware is causing symptoms or if you have a specific reason to remove it.
A: Most athletes get back to their sport within six to twelve months for shaft fractures, assuming good bone healing and appropriate rehabilitation. Return timelines depend on your sport, your position, and how your rehabilitation progresses. I work closely with athletic trainers to make this transition safely.
A: If your job is sedentary, you might return within a few weeks once you’re comfortable with crutches or a cane. Physical jobs requiring heavy lifting or prolonged standing typically require three to six months. Talk with your surgeon about your specific job demands so we can plan your return-to-work timeline.
A: You’ll need to be off crutches and pain medications before driving is safe. For most people with shaft fractures treated with nailing, that’s around six to eight weeks, but it depends on your pain level, strength, and your surgeon’s clearance. Always get explicit approval before you get behind the wheel.
A: For shaft fractures with intramedullary nailing, you can often begin bearing weight with crutches or a walker within the first few weeks and progress as tolerated. Distal and articular fractures require a more cautious approach, typically starting with touch-down weight-bearing and advancing gradually over six to eight weeks. Your surgeon and physical therapist will guide the specific timeline.
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