Spinal anesthesia tomorrow — but apixaban was taken this morning. Can you proceed?
67-year-old female on apixaban for atrial fibrillation. Last dose 12 hours ago. Surgery scheduled for tomorrow morning. Does the timing work?
Clinical scenario
67-year-old female. Elective total hip replacement under spinal anesthesia. Atrial fibrillation managed with apixaban 5 mg twice daily. Last dose taken this morning, approximately 12 hours ago. Surgery is scheduled for tomorrow morning — roughly 24 hours from now.
Pre-anesthesia assessment is requested. She is hemodynamically stable with no active bleeding. The surgeon is asking whether to proceed as scheduled.
The technique drives the requirement — not the drug
Before calculating timing, identify the technique category. Spinal anesthesia is neuraxial — the highest-risk tier for DOAC-related spinal hematoma. All Xa inhibitors (apixaban, rivaroxaban, edoxaban) require a minimum 72-hour withhold for neuraxial procedures, regardless of dose, frequency, or renal function.
| Field | Value |
|---|---|
| DOAC | Apixaban |
| Technique | Spinal anesthesia (neuraxial) |
| CrCl | Not required — Xa inhibitors are not renally adjusted |
| Typical requirement | 72 hours — strict tier (ASRA 2022) |
24 hours is not enough for neuraxial
At 24 hours post-dose, apixaban levels remain clinically significant. The ASRA 2022 consensus requires 72 hours for all Xa inhibitors before neuraxial procedures — not 48h, not 24h. At 12 hours post-dose, the gap to surgery tomorrow is only 24 hours total.
Last dose was 12 hours ago. Surgery is tomorrow (~24h away). What do you do?
- 1.
⚠ only ~24h from last dose — the 72h neuraxial window has not been met
- 2.
✓ meets the ASRA 2022 neuraxial requirement — confirm exact timing with the tool
- 3.
✓ general anesthesia uses the standard 24h tier — clinically valid if no contraindication
Teaching points
- Always determine the technique category first — not the drug. Neuraxial procedures require the strict 72h tier for all Xa inhibitors.
- Renal function adjusts timing only for dabigatran. For apixaban, rivaroxaban, and edoxaban, CrCl does not change the withhold requirement.
- Switching to general anesthesia is a clinically valid alternative when the neuraxial window cannot be met — do not reflexively delay surgery without considering the anesthetic approach.
Use the DOAC tool to verify whether the withhold window has been met for this case — and to explore what changes if you switch technique.
Verify the timing decision →Next clinical question
What if an epidural catheter is already in place and the team wants to restart anticoagulation post-operatively?
Next case: Epidural catheter removal and rivaroxaban →Continue DOAC cases
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