How Long Does Femur Surgery Take?

Most femur surgeries take between one and two hours of actual operating time, though the range stretches from about 45 minutes for a straightforward internal fixation to well over three hours for complex or delayed repairs. That spread is wide because “femur surgery” is not one procedure. Where the bone broke, what hardware is being used, the patient’s body size, and whether the operation is planned or emergent all shift the clock meaningfully. Understanding those variables gives you a much better sense of what to expect than a single average ever could.

Where the Break Is Changes Everything

The femur is the longest bone in the body, and surgeons treat fractures at three distinct zones: the top (proximal femur, including hip fractures), the middle shaft, and the bottom (distal femur, near the knee). Each location calls for different hardware and approaches, and the operating times reflect that.

For proximal femur fractures, the most common injury in older adults after a fall, a systematic review comparing internal fixation to partial hip replacement found average operating times of roughly 64 minutes for screw-and-plate fixation versus about 86 minutes for hemiarthroplasty.¹ The difference makes intuitive sense: replacing part of the joint is a bigger job than bolting the existing bone together. A separate meta-analysis comparing a different type of nail fixation to bipolar hemiarthroplasty found no significant difference in operative time between the two, so the gap depends partly on which specific implant is used.²

Mid-shaft femur fractures are typically fixed with an intramedullary nail, a metal rod threaded down the inside of the bone. In one comparative study, the average surgery duration for this procedure was about 80 minutes, with a range of 45 to 130 minutes depending on how complicated the break was.³ When surgery was delayed in patients with multiple injuries, the average climbed to about 190 minutes for a single femur, reflecting the added difficulty of operating on a fracture that has already started to heal in a misaligned position.⁴

Down near the knee, distal femur fractures can be fixed with either a retrograde nail (inserted from the knee end and pushed upward) or a locking plate screwed along the outside of the bone. One study reported average times of about 75 minutes for the nail and 83 minutes for the plate.⁵ A meta-analysis across multiple studies confirmed that plating tends to take longer and involves more blood loss compared with nailing for distal femur fractures.⁶

How Body Weight Pushes the Clock

If you are significantly overweight, your surgeon may need considerably more time to complete the operation, but only with certain approaches. A prospective multicenter study found that antegrade nailing (rod inserted from the hip end) took about 94 minutes in obese patients compared with 62 minutes in non-obese patients, a roughly 50 percent increase.⁷ The reason is largely mechanical: finding the entry point at the top of the femur through thick soft tissue is harder, and the X-ray images that guide wire and nail placement become fuzzier in larger patients. Fluoroscopy time more than tripled in obese patients undergoing antegrade nailing in that same study.

Retrograde nailing, by contrast, showed no meaningful time difference between obese and non-obese patients. The knee-end entry point is easier to access regardless of body size. A separate retrospective review confirmed this pattern, finding that each two-point increase in body mass index added roughly six minutes to antegrade procedures but only about one minute to retrograde ones.⁸ For patients with high BMI needing femoral shaft fixation, retrograde nailing can be the faster, cleaner option when the fracture pattern allows it.

The Teaching Hospital Factor

If your surgery takes place at a hospital that trains residents, expect a longer operation. This is well-documented and not subtle. One study comparing the same type of hip fracture fixation at a teaching hospital versus a community hospital found median operative times of 75 minutes versus 46 minutes.⁹ That is a substantial difference for what is, in experienced hands, a relatively quick procedure.

A study looking specifically at resident seniority found that each additional year of training added about four and a half minutes to proximal femur fracture repairs.¹⁰ That sounds counterintuitive until you realize that more senior residents are given more complex tasks and greater autonomy, which introduces learning-curve slowdowns at each new level of responsibility. Another institution-level analysis found average times of about 91 minutes with resident involvement versus 79 minutes without.¹¹ The reassuring finding across these studies is that outcomes like complication rates and hospital stays were not worse at teaching hospitals despite the extra time. The slower pace reflects supervised training, not lesser quality.

Setup, Positioning, and X-Ray Guidance

The clock you hear quoted most often measures “skin to skin” or “tourniquet” time, but the full time you spend in the operating room is longer. Before a single incision, the team needs to position you on the table, prep and drape the surgical site, and set up the imaging equipment. This adds a meaningful chunk.

Positioning alone can vary by technique. A trial comparing two ways of holding the leg during intertrochanteric fracture nailing found that using a traction table took about 29 minutes of setup and positioning time, while a manual traction approach took about 18 minutes.¹² That 11-minute difference is purely pre-surgical: the traction table is bulkier to set up, though some surgeons prefer it for the stability it provides during the operation itself.

Once surgery starts, the C-arm fluoroscopy unit becomes a constant companion. Surgeons rely on real-time X-ray to guide hardware placement, and the time spent repositioning the C-arm and shooting images adds up fast. One study found that roughly half of the total operative time for proximal femoral nailing was consumed by fluoroscopy-related activities: adjusting the machine, getting adequate views, and repositioning guide wires that landed off-target.¹³ That is a staggering proportion. The quality of the C-arm also matters: a randomized trial found that using a device with better mobility and image quality shaved about five minutes off total operating time and halved the radiation exposure.¹⁴

Emergency Versus Planned Surgery

Emergency femur operations, typically hip fractures in older patients or high-energy trauma in younger ones, tend to take longer than elective procedures even when the surgical steps are similar. A large comparison of elective versus non-elective total hip replacements found average operating times of 93 minutes for planned surgeries and 103 minutes for emergency cases.¹⁵ That 10-minute gap persisted even after accounting for differences in patient age, weight, and overall health.

The reasons are partly logistical. Emergency patients arrive without the pre-operative optimization that elective patients get: their blood counts, fluid balance, and medications have not been fine-tuned ahead of time. Operating rooms assembled on short notice may have less experienced staff or less ideal equipment setups. The fracture itself also tends to be messier in emergency settings, with more swelling and soft tissue damage. Beyond the operating time, emergency patients stay in the hospital significantly longer. One study of patients in their nineties found that those operated on urgently spent an average of five and a half extra days in the hospital compared with those who had planned surgery.¹⁶

Why a Longer Surgery Is Not Just an Inconvenience

Time on the operating table is not a neutral variable. Longer surgeries carry real downstream consequences that go beyond the discomfort of a bigger anesthesia dose. A multicenter study of distal femur fractures found that surgical duration was an independent predictor of deep infection, with the odds increasing about 15 percent for every additional hour of operating time.¹⁷ A separate study of intra-articular distal femur fractures similarly identified prolonged surgical duration as an independent risk factor for surgical site infection.¹⁸

Blood loss also correlates with time. A study of elderly patients undergoing intramedullary nailing for femoral neck fractures found that surgery duration was significantly correlated with the need for blood transfusion, second only to pre-operative hemoglobin levels as a predictor.¹⁹ This is one reason surgeons care about shaving minutes wherever they can. It is not vanity about speed; shorter procedures generally mean less exposure to infection, less blood loss, and less physiological stress on a patient who may already be fragile.

Anesthesia and the Recovery Room

Anesthesia type is a variable patients rarely think to ask about, but it can influence both the length of the operation and what happens afterward. A comparison of spinal versus general anesthesia for hip fracture surgery found that the spinal group had shorter operations by about 10 minutes on average, roughly 56 minutes versus 65 minutes.²⁰ Some of that gap comes from the induction and intubation steps required for general anesthesia, which spinal avoids.

After the surgery itself, you will spend time in the post-anesthesia care unit before being cleared for a regular room. The drugs used to keep muscles relaxed during surgery affect how quickly this happens. A randomized trial in orthopedic patients found that those given a shorter-acting muscle relaxant met discharge criteria in about 30 minutes, while those given a longer-acting agent took about 50 minutes, and actual discharge from the recovery unit took nearly 70 minutes in the slower group.²¹ If you are trying to estimate the total time from rolling into the OR to reaching your hospital bed, add at least 30 to 90 minutes for recovery on top of the surgical and setup time.

From the Emergency Department to Physical Therapy

For many patients, the question is really about the entire timeline, not just the minutes between first cut and last suture. A study of isolated femoral shaft fractures found that the average time from hospital arrival to surgery was 17 hours. After surgery, the average time to the first physical therapy session was about 1.3 days.²² Those 17 hours of waiting often involve pain management, imaging, blood work, and coordination with the operating room schedule. Hip fracture guidelines in many countries push for surgery within 24 to 36 hours of admission because delays beyond that are associated with worse outcomes in elderly patients.

The hospital stay after femur surgery varies enormously. An otherwise healthy younger adult with a clean shaft fracture fixed by nailing may be walking with crutches the next day and home within two or three days. An older adult with a hip fracture, medical comorbidities, and a joint replacement may spend a week or more in the hospital before transferring to a rehabilitation facility. The emergency versus elective gap described earlier applies here too: non-elective hip replacement patients averaged about six days in the hospital compared with three for elective patients in one large analysis.¹⁵

Robot-Assisted Surgery and Where Things Are Headed

Surgical navigation robots are increasingly making their way into femur fracture repair, and early data suggests they shave time off procedures while improving hardware placement accuracy. A study of robot-assisted proximal femoral nailing in elderly patients with intertrochanteric fractures reported average operating times of about 69 minutes with the robot versus 77 minutes with conventional technique.²³ Two other studies, covering femoral neck fracture fixation and retrograde nailing of distal femur fractures, both found shorter operative times, fewer guide wire attempts, and less blood loss with robotic navigation.^{24 25}

The time savings come largely from reducing the trial-and-error with guide wires. Remember that fluoroscopy study showing half the operating time consumed by imaging and repositioning? Robots help by pre-planning the path and guiding instruments along it, which means fewer shots, fewer attempts, and less radiation for patient and surgeon alike. These systems are still expensive and available only at larger centers, but the trajectory is toward broader adoption. For patients, the practical takeaway is that if you have a choice of facility and the fracture is not urgent, asking whether robotic navigation is available is a reasonable question.

A Realistic Time Estimate for Common Scenarios

Putting the evidence together, here is what you can broadly expect for total time in the operating suite, including setup and positioning but not recovery room time:

• Hip fracture, screw or nail fixation: About 45 to 75 minutes in most cases. Teaching hospitals run toward the higher end. Spinal anesthesia may keep total room time shorter.
• Hip fracture, partial or total replacement: About 80 to 110 minutes. More soft tissue work and a larger implant extend the procedure.
• Mid-shaft fracture, intramedullary nail: About 60 to 130 minutes. Delayed operations or multiply injured patients can push past two hours. Obese patients undergoing antegrade nailing should expect the upper end of this range.
• Distal femur fracture, nail or plate: About 70 to 100 minutes. Plating runs a bit longer on average than retrograde nailing.

Add 30 to 90 minutes of recovery room time after any of these, and allow for the possibility that an unexpected complication like difficulty reducing the fracture or poor bone quality requiring a change of hardware can push any procedure beyond its typical window. Surgeons build some buffer into their schedules for exactly this reason, so a family member waiting outside should not panic if the clock ticks past the quoted estimate by half an hour. Operations that genuinely run long are almost always recognized and managed in real time by a team prepared for contingencies.