Impact of cerebral hemodynamics and oxygen metabolism of dexmedetomidine on patients with intracranial aneurysm surgery

Abstract

Objective To investigate the effects of cerebral hemodynamics and oxygen metabolism of dexmedetomidine on patients with intracranial aneurysm surgery.Methods Sixty-four patients with intracranial aneurysm surgery were collected and randomly divided into study group and control group (32 cases for each group).Patients in the study group before induction of anesthesia were given dexmedetomidine and patients in the control group were given saline but anesthesia.Mean arterial pressure (MAP),heart rate (HR),cerebral metabolic rate of oxygen(CMRO2) in different time points were observed and time in intubation and intracranial aneurysm clamp before anesthesia were rescored.Cerebral blood flow (CBF),intracranial pressure (ICP) were observed and the recovery situation.Results At the intubation,MAP and HR in the study group after 15 min of intubation,time in intracranial aneurysm clamp and extubation were significantly lower than those of the control group(P ＜ 0.05).CMRO2 in study group at the intubation and intracranial aneurysm clamp were (34.2 ± 5.0) ％ and (27.1 ± 4.2),significantly higher than that of the control group ((33.9 ± 4.3) ％,(26.5 ±3.6) ％; P ＜ 0.05).CBF in study group at the intubation and intracranial aneurysm clamp were (53.5 ±8.8) ml/(100 g · min) and (56.8 ±9.2) ml/(100 g · min),significantly lower than that of control group ((67.3±11.2) ml/(100 g· min),(67.3 ±11.2) ml) (100 g· min); P＜0.05) ; The same trend was seen in terms of ICP.Spontaneous breathing recovery time and extubation time in study group were (7.35 ± 1.12) h and(12.98 ± 3.76),significantly earlier than those of the control group((9.27 ± 1.45) h and (14.89 ±4.88) h; t =10.92,9.23,P ＜0.01).Steward scores in study group was (5.12 ±0.33),significantly higher than control group ((3.98 ± 0.28) ; t =5.55,P ＜ 0.05).Conclusion Dexmedetomidine can certainly keep hemodynamic stability in patients with intracranial aneurysm surgery,improve rate of cerebral oxygen uptake and recovery performance,which is worthy of clinical application and promotion. Key words: Dexmedetomidine; Intracranial aneurysm surgery ; Hemodynamics ; Oxygen metabolism