Elderly Hip Fracture: Timing, Anticoagulation, and Delirium
An 84-year-old woman falls at home and sustains a displaced femoral neck fracture. She lives alone, walks with a cane, and has mild cognitive impairment (baseline MMSE 24). Her medications include apixaban 5 mg twice daily for atrial fibrillation, metoprolol, and lisinopril. Last apixaban dose was 10 hours ago. Labs: hemoglobin 10.8, platelets 180, creatinine 1.3 (eGFR ~38), INR 1.1. She is confused and agitated in the ED, pulling at lines. The anesthesia team is reluctant to proceed without reversal, and the family asks whether surgery should wait until the blood thinner is 'out of her system.'
1. How do you manage the anticoagulation and timing of surgery, and what is the evidence-based rationale?
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This tests judgment about competing harms, not a drug half-life fact.
The trade-off: delaying hip fracture surgery beyond 24–48 hours increases mortality, delirium, pressure injury, and length of stay. But operating on a therapeutic apixaban level risks major bleeding, especially with a neuraxial or general anesthetic.
Practical approach: quantify the residual effect. Apixaban has a ~12-hour half-life; with eGFR ~38 and a dose 10 hours ago, some anticoagulant effect persists. Options include:
- Wait a short, defined interval (e.g., 24–36 hours from last dose) with regional anesthesia if the anesthesiologist is comfortable, rather than an open-ended delay.
- Check a calibrated anti-Xa level if available and the result will change management; a normal level supports proceeding.
- Reversal with andexanet alfa or PCC is generally reserved for life-threatening bleeding or when delay is unacceptable; routine use for hip fracture is not standard and has cost/thrombosis trade-offs. Discuss with hematology/anesthesia.
Do not simply wait days for 'it to wear out' - that is the wrong default. Set a target time, optimize the patient (analgesia, fluids, delirium precautions), and communicate a plan to the family. Restart anticoagulation postoperatively once hemostasis is secure, balancing VTE and stroke risk.
2. The patient is delirious. What is your perioperative plan to reduce delirium and improve outcomes?
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Delirium in hip fracture is a modifiable outcome driver and a board-favorite judgment area.
Non-pharmacologic bundle (first-line):
- Early surgery (target <24–48 hours) once anticoagulation allows.
- Regional anesthesia (spinal) when feasible; avoid deep sedation; minimize anticholinergics and benzodiazepines.
- Multimodal analgesia including a fascia iliaca or femoral nerve block to reduce opioid use.
- Orient the patient, mobilize early, restore glasses/hearing aids, maintain day/night lighting, involve family, and treat constipation, urinary retention, and pain.
Pharmacologic: reserve antipsychotics (e.g., low-dose haloperidol or quetiapine) for severe agitation or danger to self/others; they do not treat the underlying cause and can prolong QT. Avoid benzodiazepines except for withdrawal.
Workup: screen for reversible causes - infection (urinalysis, chest imaging), electrolyte abnormalities, hypoxia, urinary retention, fecal impaction, and pain. Do not anchor on 'just dementia.'
Disposition: involve geriatrics/orthogeriatrics, plan for delirium follow-up, and counsel family that delirium increases 6-month mortality and functional decline - early mobilization and a structured bundle improve outcomes.