Correlation between preoperative imaging features and intraoperative blood loss of meningioma: a new scoring system for predicting intraoperative blood loss.

The aim of this paper was to analyze the correlation between preoperative imaging features and intraoperative blood loss and transfusion of meningioma in order to explore the possibility of reasonable blood preparation based on the preoperative images.The data of 93 adults with meningioma having undergone microsurgical operations was retrospectively analyzed. The intraoperative blood loss of meningioma was evaluated with "estimated blood loss (EBL)". The preoperative imaging features including volume, origin, peritumoral edema, invasive behavior, calcification, dural tail sign, adjacent bone involvement, blood vessel or venous sinus involvement were reviewed. Logistic regression analysis was used to determine the correlations between the imaging factors and the EBL or blood requirement.Origin, volume, and blood vessel or venous sinus involvement of meningioma affected its EBL statistically. Calcification, invasive behaviors, dural tail sign, peritumoral edema and adjacent bone involvement did not influence EBL statistically. Origin and volume were independent risk factors for the high intraoperative blood loss. Origin, volume and blood vessel or venous sinus involvement were independent risk factors for the intraoperative red blood cell transfusion requirement. A scoring method was proposed to predict the intraoperative blood loss and transfusion of meningioma based on preoperative images.It is feasible to predict the intraoperative blood loss and transfusion of meningioma surgery according to the preoperative images.