摘要
目的 应用磁共振弥散峰度成像(diffusional kurtosis imaging,DKI)研究阻塞性睡眠呼吸暂停低通气综合征(OSAHS)患者的脑白质变化情况.方法 选取2017年11月～2021年6月行多导睡眠监测(PSG)确诊为OSAHS的患者38例(OSAHS组),另选取性别、年龄相匹配的非OSAHS者32例(对照组);所有受试者均行DKI扫描,通过比较两组各脑区的峰度各向异性分数(kurtosis fractional anisotropy,KFA)找出差异性脑区并分析OSAHS组患者差异性脑区的KFA值与PSG结果中呼吸暂停低通气指数(AHI)、最低血氧饱和度(lowest saturation oxygen,LSaO2)、血氧饱和度小于90%时间占监测总时间的百分比(the percent of the total record time spent below 90%oxygen saturation,TS90%)的相关性.结果 OSAHS组在胼胝体、双侧放射冠、扣带回以及右侧小脑上脚、下脚区域白质纤维束的KFA值均低于对照组(P<0.05).在控制年龄和体重指数(BMI)两个指标的前提下行偏相关分析得出:OSAHS组患者的AHI与胼胝体、左侧后放射冠、右侧前放射冠、扣带回的KFA值呈负相关(r=-0.344、-0.380、-0.406、-0.537,P<0.05);LSaO2与胼胝体、左侧后放射冠、右侧前放射冠、扣带回、右侧小脑上脚的KFA值呈正相关(r=0.366、0.406、0.446、0.404、0.342,P<0.05);TS90%与胼胝体、左侧后放射冠、右侧前放射冠、扣带回、右侧小脑上脚、右侧小脑下脚的KFA值呈负相关(r=-0.414、-0.352、-0.355、-0.336、-0.456、-0.360,P<0.05).结论 OSAHS患者夜间的反复呼吸暂停和低氧血症会导致部分脑区白质纤维受损,从而引发对应的脑功能障碍.
Abstract
OBJECTIVE To explore the changes of brain white matter of the patients with obstructive sleep apnea-hypopnea syndrome(OSAHS)with magnetic resonance diffusional kurtosis imaing(DKI).METHODS There were 38 patients with OSAHS examined by polysomnogram(PSG)from November 2017 to June 2021,and 32 non-OSAHS controls matched in gender and age who were included in this study.All the subjects were scanned by DKI.The different encephalic regions through comparing kurtosis fractional anisotropy(KFA)values of all encephalic regions between the two groups were found,and the relationship between the KFA values of the different encephalic regions in OSAHS patients and the apnea-hypopnea index(AHI),lowest saturation oxygen(LSaO2)and the percent of the total record time spent below 90%oxygen saturation(TS90%)in PSG were analyzed.RESULTS The KFA values of white matter fiber tracts in corpus callosum,bilateral corona radiata,cingulate gyrus,right superior cerebellar peduncle and inferior cerebellar peduncle of OSAHS group were obviously lower than control group(P<0.05).After controlling for age and body mass index(BMI),the partial correlation between AHI and the KFA values of corpus callosum,left posterior corona radiata,right anterior corona radiata,cingulate gyrus in OSAHS group were also negative(r=-0.344,-0.380,-0.406,-0.53,P<0.05).The partial correlation between LSaO2 and the KFA values of corpus callosum,left posterior corona radiata,right anterior corona radiata,cingulate gyrus,right superior cerebellar peduncle in OSAHS group were also positive(r=0.366,0.406,0.446,0.404,0.342,P<0.05).The partial correlation between TS90%and the KFA values of corpus callosum,left posterior corona radiata,right anterior corona radiata,cingulate gyrus,right superior cerebellar peduncle and inferior cerebellar peduncle in OSAHS group were also negative(r=-0.414,-0.352,-0.355,-0.336,-0.456,-0.360,P<0.05).CONCLUSION Recurrent apnea and hypoxemia at night of OSAHS patients can cause damage to white matter fibers in parts of encephalic regions.
维普
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