Post-Extraction Bleeding in a Patient on Warfarin
A 68-year-old man undergoes extraction of tooth 38 under local anesthesia. His medical history includes atrial fibrillation, for which he takes warfarin with an INR of 3.2 measured two days ago. He also takes amlodipine for hypertension. The extraction was atraumatic, but 30 minutes after placement of a pressure pack, bleeding continues from the socket. His blood pressure is 158/92 mmHg, pulse 88, and he is alert and oriented. He reports no prior bleeding problems after dental procedures. The socket appears to be oozing dark blood without a visible clot.
1. What is your immediate management of the bleeding, and how does his INR affect your decision-making?
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Immediate management:
- Reassure the patient and check vital signs; his BP is elevated, which may contribute to bleeding.
- Remove the old pack and inspect the socket; suction gently.
- Place a fresh gauze pack and apply firm, continuous pressure for 20–30 minutes. If bleeding persists, use a hemostatic agent such as oxidized cellulose, collagen sponge, or topical thrombin, then suture the socket and apply pressure.
- Consider tranexamic acid mouthwash (4.8%) four times daily for 2–3 days as an adjunct.
- If bleeding remains uncontrolled, refer to an oral surgeon or emergency department.
INR considerations:
- An INR of 3.2 is above the typical therapeutic range (2.0–3.0) and above the threshold (often ≤3.5) at which most guidelines permit simple extractions with local measures. However, an INR measured two days ago may not reflect current status; recheck if possible.
- Do NOT stop warfarin without cardiology consultation; the risk of thromboembolism (AF) outweighs bleeding risk for a simple extraction.
- Local hemostatic measures are usually sufficient. If bleeding cannot be controlled, coordinate with his physician regarding vitamin K or fresh frozen plasma.
Documentation: Record INR, measures taken, and communication with the physician.
2. What would you do differently for a future extraction in this patient, and what postoperative instructions would you give?
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Future planning:
- Check INR within 24–48 hours of the procedure; ideally target ≤3.0–3.5 for simple extractions per local protocol.
- Schedule morning appointments so the patient can return if bleeding occurs.
- Consider a single-tooth extraction rather than multiple teeth to reduce bleeding surface.
- Have hemostatic agents and suture materials ready in advance.
- Coordinate with the anticoagulation clinic; do not alter warfarin dose unilaterally.
Postoperative instructions:
- Bite firmly on gauze for 30–45 minutes; avoid rinsing, spitting, smoking, or hot drinks for 24 hours.
- Avoid strenuous activity and lying flat; keep head elevated.
- Take analgesics (paracetamol; avoid NSAIDs if possible due to bleeding risk and interaction with warfarin).
- If bleeding recurs, apply pressure with clean gauze for 20 minutes; if it persists, contact the clinic or go to the emergency department.
- Watch for signs of excessive bleeding (large clots, dizziness, pallor) and seek help.
- Continue warfarin as prescribed; do not skip doses.