Factors influencing intraoperative blood loss in bimaxillary orthognathic surgery

The study aimed to investigate the risk factors that could affect intraoperative blood loss in patients who underwent orthognathic surgery.

The study included a retrospective analysis of 400 patients who underwent bimaxillary orthognathic surgery. Data on demographic, surgical, and hematological parameters affecting intraoperative blood loss were statistically analyzed.

The mean intraoperative blood loss of male patients was statistically higher than that of female patients (p ≤ 0.001). The mean blood loss was higher in patients aged 25 years and older than in patients aged 17-24 (p=0.004). Patient weight and duration of surgery were positively correlated with the amount of intraoperative bleeding (r = 0.280 and r = 0.371). Platelet (PLT) count negatively correlated with blood loss (r=-0.213). The MPV/PLT ratio and hemoglobin (HGB) levels were positively correlated with bleeding (r=0.208 and r=0.110).

In orthognathic surgeries, factors such as age, gender, body mass, and duration of surgery were found to be associated with intraoperative blood loss. Males, patients over 24, overweight patients, and prolonged surgical procedures are all significant risk factors for bleeding. In addition, high HGB levels, low platelet count, and low MPV/PLT ratios are also associated with an increased risk of blood loss.