CAJ | 학술논문

目的为飞行员心脑功能鉴定提供试验方法和依据.方法测试45名男性飞行员(平均年龄27.5±2.6岁)在完成5 h"连续操作"任务期间,大脑前动脉(ACA)、大脑中动脉(MCA)和大脑后动脉(PCA)的脑平均血流速度(Vm),同步分析Vm、立位耐力与心脑功能指标间的变化关系,并对持续认知操作活动诱发的脑应激疲劳(CFS)进行斯坦福嗜睡量表(SSS)评定.结果从第4 h以后,PCA的Vm先于ACA、MCA显著下降(t=9.254、11.918,P<0.05),出现晕厥前症状(PSS)时,ACA、MCA、PCA的Vm和立位耐力同时降低(t=9.314、11.654、15.120、20.545,P<0.05).脑电功率指数、心率变异性、连续操作能力指数测试及SSS主观评定表明心脑功能出现了严重抑制.结论 CFS末期,出现PSS时,ACA、MCA、PCA的Vm与立位耐力同步下降.CFS可诱发PSS或立位耐力降低.
목적 위비행원심뇌공능감정제공시험방법화의거.방법 측시45명남성비행원(평균년령27.5±2.6세)재완성5 h"련속조작"임무기간,대뇌전동맥(ACA)、대뇌중동맥(MCA)화대뇌후동맥(PCA)적뇌평균혈류속도(Vm),동보분석Vm、립위내력여심뇌공능지표간적변화관계,병대지속인지조작활동유발적뇌응격피로(CFS)진행사탄복기수량표(SSS)평정.결과 종제4 h이후,PCA적Vm선우ACA、MCA현저하강(t=9.254、11.918,P<0.05),출현훈궐전증상(PSS)시,ACA、MCA、PCA적Vm화립위내력동시강저(t=9.314、11.654、15.120、20.545,P<0.05).뇌전공솔지수、심솔변이성、련속조작능력지수측시급SSS주관평정표명심뇌공능출현료엄중억제.결론 CFS말기,출현PSS시,ACA、MCA、PCA적Vm여립위내력동보하강.CFS가유발PSS혹립위내력강저.
Objective To provide the evidences and methods for assessing pilot's cardio-cerebral function. Methods Forty-five male pilots (average age was 27.5±2.6 years) were selected as subjects. Cerebral mean blood velocities (Vm) of anterior cerebral artery (ACA), middle cerebral artery (MCA) and posterior cerebral artery (PCA) were measured in the "consecutive operation task" for 5 h by transcranial Doppler ultrasonography. Cerebral fatigue in stress (CFS) that induced by consecutive operation tasks was evaluated by Stanford sleepiness scales (SSS). Such parameters as blood pressure (related to orthostatic tolerance), Vm, neurobehavioral ability index (NAI), electroencephalogram power index β_2 (PIβ_2), heart rate variability (HRV) and scores of SSS were compared individually. Results When performing consecutive operation task for 4 h, Vm of PCA declined significantly earlier than that of ACA and MCA (t=9.254, 11.918, P<0.05). When pre-syncope symptom (PSS) occurred, orthostatic tolerance and Vm of ACA, MCA and PCA declined simultaneously (t=9.314, 11.654, 15.120, 20.545, P<0.05). The test results of PIβ2, HRV, NAI and subjective assessment of SSS indicated the serious depression of cardio-cerebral functions. Conclusions At the end of CFS, the Vm of ACA, MCA and PCA are synchronously declined with orthostatic tolerance when PSS occurred. CFS may induce PSS and orthostatic intolerance.