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目的探讨脑导纳技术对急性脑损伤的诊断价值。方法对35例急性脑损伤患者进行双侧脑血流检测,与40例健康组对照,分析脑导纳图各项指标的特点及临床意义。结果外伤组脑供血量明显减少(ADLⅠ+Ⅱ指数减少),流入容积速度(HS/BS)下降,与对照组差异有统计学意义(P<0.05或P<0.01);治疗前后动态观察显示:病情恶化者脑导纳微分环波形渐变差,恢复者渐好转。结论脑损伤(3~21 d)的脑导纳图主要改变为:ADLⅠ+Ⅱ、及HS/BS减小,ADL IV及ADL IV/ADLⅠ+Ⅱ增大。提示病灶侧供血减少,血流缓慢。脑导纳图的动态观测对脑损伤的预后及疗效判断有一定的意义。
Objective To investigate the diagnostic value of brain admittance technology in acute brain injury. Methods Bilateral cerebral blood flow was measured in 35 patients with acute brain injury and compared with 40 healthy subjects. The characteristics and clinical significance of each index of brain admittance map were analyzed. Results The volume of cerebral blood supply in traumatic group was significantly decreased (ADLⅠ + Ⅱ index decreased), and the inflow volume velocity (HS / BS) decreased. There was a significant difference between the two groups (P <0.05 or P <0.01) : Worsened brain admittance differential ring waveform gradient worse recovery gradually improved. Conclusions The changes of brain admittance in brain injury (3 ~ 21 d) are mainly as follows: ADL Ⅰ + Ⅱ, HS / BS decrease, ADL IV and ADL IV / ADL Ⅰ + Ⅱ increase. Tip lesion side to reduce blood flow, slow blood flow. The dynamic observation of brain admittance graph has certain significance on the prognosis and curative effect of brain injury.