ABSTRACT
RESUMEN La cirugía ortognática (CO) es un procedimiento quirúrgico que genera pérdida sanguínea intraoperatoria (PSI), motivo por el cual el cirujano bucal y maxilofacial (CBMF) permanentemente está generando nuevas técnicas para controlarla. Objetivo: Determinar los factores asociados a la PSI en CO. Material y Métodos: Estudio retrospectivo, descriptivo transversal y analítico. Se revisaron 60 historias clínicas de pacientes operados de CO que cumplieron los criterios de selección. La variable dependiente fue PSI y las covariables: tipo de CO, operador (Cirujano bucal y Maxilofacial o Residente del programa en CBMF), instrumentos de corte, tiempo operatorio (TO), tiempo de protrombina (TP), tiempo de tromboplastina (TTP), recuento de plaquetas, edad y sexo. Se aplicaron las pruebas estadísticas ANOVA, t de Student, Rho de Spearman y correlación de Pearson. Resultados: Existe asociación estadísticamente significativa entre la PSI con el TO y la relación con el operador (p<0,005) y (p<0,001). Además, existe correlación directa entre PSI y TO (p<0,05). Conclusiones: El operador y el TO son variables asociadas directamente a la PSI en las CO.
ABSTRACT Orthognathic surgery is a surgical procedure that generates intraoperative blood loss, which is why the oral and maxillofacial surgeon is constantly generating new techniques and technologies for the reduction of intraoperative blood loss. Objective: To determine the factors associated with intraoperative blood loss in orthognathic surgery. Material and Methods: It is a retrospective, descriptive, cross-sectional and analytical study. Sixty medical records of patients operated of orthognathic surgery were reviewed that met the selection criteria. The dependent variable was intraoperative blood loss and the covariates: type of orthognathic surgery, operator: Maxillofacial surgeon or resident of the program in maxillofacial surgeon, cutting instruments, operative time, prothrombin time, thromboplastin time, platelet count, age and sex. The statistical tests ANOVA, Student's t, Spearman's Rho and Pearson's correlation were applied. Results: There is a significant difference in Intraoperative blood loss and operative time in relation to the operator who performed the surgery (p<0.005) and (p<0.001) there is also a direct correlation between intraoperative blood loss and operative time (p<0.05). Conclusions: The operator and the TO are variables directly associated with the PSI in the orthognathic surgery.
