Patients undergoing shoulder arthroscopy in the beach chair position may be at risk for adverse neurologic events due to cerebral ischemia. Dexmedetomidine, a potent alpha adrenoceptor agonist which dose-dependently reduces arterial blood pressure and heart rate, decreases the hemodynamic and catecholamine response in the perioperative period. dexmedetomidine has an effect of peripheral vasoconstriction thus it is theologically appropriate for reducing bleeding for arthroscopic operation field. The aim of this study is to evaluate the efficacy and the safety of dexmedetomidine on cerebral oxygen saturation, cognitive function, hemodynamic stability and operative field in patients undergoing arthroscopic shoulder surgery in the beach-chair position.
Study Type
INTERVENTIONAL
Allocation
NA
Purpose
PREVENTION
Masking
NONE
Enrollment
19
dexmedetomidine 0.7mcg/kg/hr continuous infusion
Department of Anesthesiology and Pain Medicine,Yonsei University Health System
Seoul, Seoul, South Korea
Regional cerebral oxygen saturation value
Before the anesthetic induction(T1), Before endotracheal intubation(T2), After endotracheal intubation(T3), Before the beach-chair position(T4), 5 minutes after the beach-chair position(T5), Before the operation(T6), 5 minutes after the incision(T7), After removal of the arthroscopy(T8), at the end of the operation(T9)
Time frame: T1,T2,T3, T4, T5,T6, T7, T8, T9 time of post-dose during surgery
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