The effect of anesthetic techniques on hemostatic function in arthroscopic surgery: evaluation by thromboelastography.

Abstract

Background: Anesthetic techniques are known to affect blood hemostasis, which may be responsible for the pathogenesis of postoperative venous thromboembolism. The purpose of this study was to evaluate the effect of general and spinal anesthesias on blood hemostasis using thromboelastography.

Methods: Forty patients undergoing arthroscopic knee surgery were enrolled for study and randomly allocated to one of two groups, to receive either general (GA; n = 20) or spinal anesthesia (SA; n = 20). In addition to thromboelastography, prothrombin and activated partial-thromboplastin time, and haematocrit and platelet count were also examined concurrently. Blood was sampled and examined before anesthesia to provide the baseline data (Time 1). Three more evaluations were performed at different time, i.e., twenty minutes after induction of anesthesia and just prior to skin incision (Time 2), thirty minutes after skin incision (Time 3), and three hours after surgery (Time 4).

Results: There were no intra- or inter-group differences noted as comparing the measured parameters obtained prior to, during, or three hours after surgery.

Conclusions: From the present study, we do not find any individual anesthetic technique which would have effect on the hemostasis of patients who received diagnostic arthroscopic surgery.