CAJ | 학술논문

目的探讨检测脑血流动力学的快捷、实用的新方法，为临床检测奠定基础。方法利用经颅多普勒(TCD)检测大鼠大脑中动脉(MCA)的血流速度，同步记录有创血压，按照临界关闭压(CCP)的理论计算出脑血流自动调节的下限和微动脉阻力，与改变血压测定的结果进行比较。结果 CCP法检测到的脑血流自动调节下限为70.88±24.05 mmHg，与常用血压改变测定的结果数值接近，可以相互替代。肾血管性高血压大鼠(RHR)的脑血流自动调节下限和微动脉阻力的升高，与动脉血压的升高，特别是脉压差的增大密切相关。结论按照CCP理论测定脑血流自动调节下限和微动脉的阻力，可以准确、快捷地反映脑血流动力学的生理状态和病理改变。
목적탐토검측뇌혈류동역학적쾌첩、실용적신방법，위림상검측전정기출。방법이용경로다보륵(TCD)검측대서대뇌중동맥(MCA)적혈류속도，동보기록유창혈압，안조림계관폐압(CCP)적이론계산출뇌혈류자동조절적하한화미동맥조력，여개변혈압측정적결과진행비교。결과 CCP법검측도적뇌혈류자동조절하한위70.88±24.05 mmHg，여상용혈압개변측정적결과수치접근，가이상호체대。신혈관성고혈압대서(RHR)적뇌혈류자동조절하한화미동맥조력적승고，여동맥혈압적승고，특별시맥압차적증대밀절상관。결론안조CCP이론측정뇌혈류자동조절하한화미동맥적조력，가이준학、쾌첩지반영뇌혈류동역학적생리상태화병리개변。
Objective 　To establish a new practical method to assess the cerebral blood flow autoregulation. Methods　We assessed the flow velociey of middle cerebral artery with transcranial Doppler and recorded invasively the blood presure simultaneonsly. Then on the basis of critical closing pressure (CCP), the lower limit of cerebral blood flow autoregulation and the blood flow resistance of arterioles were calculated.The data compared with the results generated by routine method. Results　The lower limit of autoregulation working out by CCP was 70.88±24.05 mmHg, which was similar to the result measured by routine method. The lower limit of autoregulation and the arteriole resistance in RHR were significantly higher than those of normal controls, and highly relate to arterial blood pressure significantly, especially pulse pressure. Conclusions　The physiology and pathology of cerebral blood flow can be evaluated conveniently and accurately by assessment of the lower limit of autoregulation and arterioles resistance with CCP.