求翻译：采用对比实验的方法，观察头痛宁胶囊在治疗偏头痛病的疗效及生化指标；探讨头痛宁胶囊在治疗偏头痛过程中的疗效程度、脑动脉血流速度、血清中K+、Na+、Mg+、CI+浓度、MEK浓度、CGRP含量的影响。是什么意思？

Using experimental methods, observation on migraine treated by toutongning capsule in clinical and biochemical index of disease; in the course of discussion on migraine treated by toutongning capsule in degree of efficacy, in serum of cerebral blood flow velocity, K+, Na+, Mg+, CI+ concentration, MEK concentration, effects of CGRP content.