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Clinical implications of factor XII deficiency
1Department of Oral and Maxillofacial Surgery, Indiana University, School of Dentistry, Indianapolis 46202.
Oral Surgery, Oral Medicine, and Oral Pathology
|September 1, 1989
Summary
Patients with factor XII deficiency can undergo dental surgery without excessive bleeding. This suggests factor XII deficiency may not significantly impact hemostasis during procedures, contrary to expectations.
Area of Science:
- Coagulation science
- Oral surgery
- Hemostasis
Background:
- Factor XII deficiency is a known bleeding disorder.
- Dental extractions, particularly of impacted third molars, carry a risk of bleeding.
- Preoperative assessment is crucial for patients with bleeding disorders.
Observation:
- A patient with severe factor XII deficiency (PTT >100s, Factor XII <1%) underwent extraction of four impacted third molars.
- The surgical procedure and immediate postoperative period were monitored for bleeding complications.
Findings:
- Despite the severe deficiency in factor XII, no significant intraoperative or postoperative bleeding occurred.
- This challenges the presumed clinical significance of factor XII in surgical hemostasis.
Implications:
- Factor XII may play a less critical role in surgical bleeding than previously thought.
- Further research is needed to understand the clinical implications of factor XII deficiency, particularly regarding thromboembolism.
- This case highlights the complexity of coagulation factor deficiencies and their clinical manifestations.