Displaced Femoral Neck Fracture in an Elderly Patient on Anticoagulation
An 82-year-old woman with hypertension, type 2 diabetes (HbA1c 8.1%), and atrial fibrillation on warfarin (INR 3.2 today) falls at home and cannot bear weight. She has a displaced femoral neck fracture (Garden IV) on the right. She lives alone, uses a walker indoors, and is cognitively intact but frail (BMI 19, albumin 28 g/L). Her medications include warfarin, metformin, and a beta-blocker. She has no known bleeding disorder. The family asks whether surgery can wait until the INR is corrected. The anesthetist is concerned about spinal hematoma risk with neuraxial anesthesia. The on-call resident proposes delaying surgery 3 days for medical optimization.
1. How do you counsel the family and the team about timing of surgery, and what is the evidence-based rationale?
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Counseling: Explain that early surgery (ideally within 24–48 hours) reduces complications - pressure ulcers, pneumonia, thromboembolism, delirium, and mortality - and that delay for “optimization” of a fixable problem is usually harmful. The family should understand that the INR is a modifiable barrier, not a reason for a 3-day delay.
Rationale:
- National and international guidance supports surgery within 48 hours when the patient is medically fit, with correction of reversible factors rather than blanket delay.
- Warfarin/INR 3.2: the standard approach is to reverse with vitamin K (IV) ± prothrombin complex concentrate to bring INR to a safe operative threshold (commonly ≤1.5 for neuraxial anesthesia; many centers accept ≤2.0 for general anesthesia with careful hemostasis). Reversal can be achieved within hours, not days.
- Do not delay 3 days. Prolonged immobility in a frail 82-year-old with low BMI and low albumin markedly increases mortality and loss of independence.
- Multidisciplinary input: anesthesia, hematology, and orthogeriatrics should co-manage. The beta-blocker should be continued; metformin held around surgery per protocol; glucose optimized concurrently rather than sequentially.
Practical plan: give vitamin K and PCC now, recheck INR in 4–6 hours, proceed to surgery once corrected, with general or regional anesthesia decided by the anesthetist based on coagulation status at the time.
2. Compare arthroplasty versus internal fixation for this fracture in this patient, and justify your choice.
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Options:
- Internal fixation (cannulated screws / DHS): preserves the native head, shorter operative time, less blood loss, but high reoperation rate in displaced femoral neck fractures, especially in elderly patients with osteoporosis. Garden IV has a high rate of avascular necrosis and nonunion.
- Hemiarthroplasty: replaces the head, avoids nonunion/AVN, allows early weight-bearing. Lower dislocation risk than total hip arthroplasty (THA) but higher rates of acetabular erosion and groin pain in active patients.
- Total hip arthroplasty (THA): better function and lower reoperation in independently mobile patients, but higher dislocation risk and greater surgical insult.
Choice for this patient: She is cognitively intact but frail, low BMI, walks with a walker, lives alone. Displaced Garden IV in an elderly patient → arthroplasty is preferred over fixation because of the high failure rate of fixation. Between hemiarthroplasty and THA: her low activity level (walker, frail) and comorbidity favor hemiarthroplasty (or a unipolar/bipolar according to local practice), which is quicker, less blood loss, and lower dislocation risk. THA could be considered if she were more active and medically robust; here the risk-benefit favors hemiarthroplasty. Cemented stem is preferred in frail elderly to reduce periprosthetic fracture risk and allow immediate weight-bearing.
Caveat: if she were a non-ambulator or bed-bound, even hemiarthroplasty might be questioned; but she mobilizes with a walker, so arthroplasty is justified.
3. Outline the perioperative medical and thromboprophylaxis plan, including management of her diabetes, nutrition, and anticoagulation resumption.
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Anticoagulation:
- Pre-op: reverse warfarin with IV vitamin K ± PCC; target INR per anesthesia plan.
- Post-op: restart thromboprophylaxis once hemostasis secure - typically LMWH (dose-adjusted for renal function and weight) starting 6–12 hours post-op, plus mechanical prophylaxis (TEDS/IPC).
- Warfarin resumption: restart when oral intake reliable and bleeding risk acceptable, usually within 24–48 hours, with bridging LMWH until INR therapeutic. Coordinate with cardiology/hematology given AF.
- Duration: extended prophylaxis (up to 28–35 days) is standard after hip fracture surgery.
Diabetes:
- HbA1c 8.1% indicates poor control; aim for perioperative glucose 6–10 mmol/L. Use a variable-rate insulin infusion or basal-bolus regimen; avoid sliding-scale-only. Hold metformin around surgery and contrast/renal risk; restart when renal function and intake allow.
- Involve diabetes team; monitor for hyperglycemia-related infection risk.
Nutrition:
- Albumin 28 g/L and BMI 19 indicate malnutrition - a major risk factor for poor wound healing and infection. Request dietitian review, consider oral nutritional supplements, and screen with a validated tool (e.g., MUST). Do not delay surgery for nutrition alone, but address it concurrently.
Other:
- Delirium prevention: orientation, analgesia, early mobilization, avoid anticholinergics.
- Pressure area care and early mobilization day 1.
- Falls prevention and bone health review - she likely has osteoporosis; arrange DXA and consider bisphosphonate/calcium/vitamin D post-operatively.
- Anaemia: check Hb, group and save; transfuse per threshold.
- Orthogeriatric co-management improves outcomes and should be arranged.