Rawisara Sansiri

Warit Powcharoen

Keywords :

predictor, intraoperative blood loss, oral and maxillofacial surgery

Abstract :

Oral and maxillofacial surgery presents risk of intraoperative blood loss as there is an abundant of blood vessels in oral and maxillofacial region. Recognition of the risk of excessive intraoperative blood loss will allow surgical team to prepare management and prevention as well as reduce chance of perioperative blood transfusion. This study aimed to explore the predictors of excessive intraoperative blood loss in oral and maxillofacial surgery. This was a retrospective study, which collected the data from patients undergoing oral and maxillofacial surgery under general anesthesia at the Faculty of Dentistry, Chiang Mai University from 2016-2020. The data of 440 patients were analyzed using logistic regression analysis to determine the predictors of excessive intraoperative blood loss. The results showed that 76 patients (17.3%) had excessive bleeding during surgery, based on the percentage of blood loss compared to their total blood volume which was more than 15%. Factors significantly associated with excessive intraoperative blood loss were BMI, operative time, and types of surgery. When the model combining those factors was used to predict intraoperative blood loss, the area under the receiver operating characteristic (ROC) curve was 0.88. Therefore, the predictors for excessive intraoperative blood loss in oral and maxillofacial surgery were BMI, operative time, and types of surgery.

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