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Risk Factors Affecting Postoperative Hemorrhage After Tooth Extraction in Patients Receiving Oral Antithrombotic Therapy.
MedLine Citation:
PMID:  21277059     Owner:  NLM     Status:  Publisher    
PURPOSE:: We investigated risk factors affecting the onset of postoperative hemorrhage after tooth extraction in patients receiving oral antithrombotic therapy. PATIENTS AND METHODS:: A total of 443 tooth extractions were performed in 382 patients. All extractions were performed while continuing conventional antithrombotic therapy, and local hemostatic measures were performed. RESULTS:: Among the 17 patients with postoperative hemorrhage, 9 received warfarin monotherapy, 6 received warfarin and antiplatelet combination therapy, and 2 received antiplatelet monotherapy. Postoperative hemorrhage occurred within 6 days in 16 patients (94.1%), with a median of 3 days. The international normalized ratio at the time of extraction was less than 3.0 for all 15 patients receiving warfarin therapy but was prolonged, at 3.0 or greater, in 7 of 12 patients in whom this value was measured at the time of postoperative hemorrhage. As for local hemostatic measures at the time of postoperative hemorrhage, thorough local hemostatic measures were required in 12 (80.0%) of the 15 patients receiving warfarin therapy. Conversely, in the 2 patients receiving antiplatelet therapy, hemostasis was achieved by use of compression alone. Concerning factors affecting postoperative hemorrhage, significant differences were seen in relation to surgical tooth extraction (P = .008) and acute inflammation findings (P = .007). CONCLUSIONS:: In patients receiving antithrombotic therapy, surgical tooth extraction and acute inflammatory findings were associated with a significantly increased incidence of postoperative hemorrhage. In more than 90% of cases, postoperative hemorrhage occurred within 6 days of extraction. Thorough local hemostatic measures are therefore required in patients receiving warfarin therapy.
Yoshinari Morimoto; Hitoshi Niwa; Kazuo Minematsu
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-1-27
Journal Detail:
Title:  Journal of oral and maxillofacial surgery : official journal of the American Association of Oral and Maxillofacial Surgeons     Volume:  -     ISSN:  1531-5053     ISO Abbreviation:  -     Publication Date:  2011 Jan 
Date Detail:
Created Date:  2011-1-31     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8206428     Medline TA:  J Oral Maxillofac Surg     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2011 American Association of Oral and Maxillofacial Surgeons. Published by Elsevier Inc. All rights reserved.
Associate Professor, Department of Dental Anesthesiology, Graduate School of Dentistry, Osaka University, Suita, Japan.
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