大黄素、大黄酚标准溶液有效期的研究

该研究通过经典恒温试验,采用HPLC测定大黄素、大黄酚的含量,研究该标准溶液含量的变化规律,探讨大黄素、大黄酚标准溶液的保存条件和有效期,规范中药检验对照品的管理。结果显示大黄素、大黄酚标准溶液的含量变化符合一级反应规律。在10℃的储藏条件下,大黄素、大黄酚标准溶液的含量变化速度常数分别为K大黄素=4. 661 7×10^-7,K大黄酚=4. 438 9×10^-7,有效期分别为1 806,1 896 d。标准溶液有效期的确定和使用的规范化,不仅有助于减少对标准物质的损耗,节约药品检验的成本;更有利于规范标准物质的使用,从而获得更准确、更满意的实验结果,为中药对照品溶液保存期限设定和标准化管理提供了一定依据。     

Effect of decompressive hemicraniectomy in patients with acute middle cerebral artery infarction

Background/aim We aimed to determine in which cases this procedure may be more effective based on the data of patients who underwent decompressive hemicraniectomy (DHC).Material and methodsOverall, 47 patients who underwent DHC due to acute middle cerebral artery (MCA) infarction between January 2014 and january 2019 were retrospectively investigated. These patients were divided into two groups: those who died after DHC (Group A) and those who survived DHC (Group B). The groups were compared in terms of various parameters. We investigated whether the patient’s modified Rankin scale (mRS) status changed depending on age (> 60 and < 60 years).ResultsThe median age of all patients was 65 (37–80) years; groups A and B had median ages of 66.5 (37–80) and 61 (44–79) years (p = 0.111), respectively; 55.3% patients were male. The elapsed times until hospitalization after the onset of symptoms were 4.5 and 3 h in groups A and B, respectively (p = 0.014). The median GCS score at the time of admission was 7 (5–12) and 10 (8–14) in groups A and B, respectively (p = 0.0001). At the time of admission, 63.3% patients in group A had anisocoria, whereas no patient in group B had anisocoria (p = 0.0001). In postoperative period, 40% patients in group A and all patients in group B received AC/AA treatment. The survival of patients aged < 60 and > 60 years who underwent DHC for MCA infraction was 61.5% and 26.5%, respectively (p = 0,041). The median mRS of patients < 60 and > 60 years were 4 (1–6) and 6 (1–6), respectively (p = 0.018).Conclusion Age, DHC timing, and elapsed time until hospitalization or access to treatment directly affect the functional outcome and survival in MCA-infarcted patients who underwent DHC. In patients in whom the medical treatment fails, early DHC administration will increase survival without waiting for neurological worsening once herniation is detected radiologically.