Related Experiment Video
Updated: Jul 4, 2026
10:28
Biological Compatibility Profile on Biomaterials for Bone Regeneration
Published on: November 16, 2018
Template bleeding time for preoperative screening in patients having orthognathic surgery
1Department of Oral and Maxillofacial Surgery, Karolinska Institutet, Box 4064, SE-141 04 Huddinge, Sweden. maria.modig@ki.se
The British Journal of Oral & Maxillofacial Surgery
|June 6, 2008
Summary
Template bleeding time (TBT) is not a reliable screening tool for primary bleeding disorders in orthognathic surgery patients. Routine preoperative TBT testing is not recommended due to frequent false positives and lack of correlation with surgical bleeding.
Area of Science:
- Oral and Maxillofacial Surgery
- Hematology
- Surgical Complications
Background:
- Excessive blood loss is a rare but serious complication of orthognathic surgery.
- Preoperative screening for bleeding disorders is crucial to minimize surgical risks.
Purpose of the Study:
- To evaluate the effectiveness of template bleeding time (TBT) in detecting primary bleeding disorders in patients undergoing orthognathic surgery.
- To determine the rate of false positive TBT results.
- To assess the correlation between preoperative TBT and perioperative bleeding.
Main Methods:
- Retrospective review of orthognathic surgery patients (August 2001 - December 2006).
- Preoperative screening using template bleeding time (TBT).
- Analysis of perioperative bleeding rates and correlation with TBT results.
Main Results:
- Prolonged TBT was observed in 13% of patients (20/155), predominantly females.
- 10 out of 20 patients with prolonged TBT were diagnosed with a primary bleeding disorder.
- No significant correlation was found between prolonged TBT and perioperative bleeding rates.
Conclusions:
- Routine preoperative TBT screening is not recommended for orthognathic surgery due to a high rate of false positives.
- TBT does not reliably predict or correlate with perioperative bleeding in this patient population.