等长收缩运动中血浆内啡呔的检测及评价

目的观察健康青年人在等长收缩运动(IE)时血浆内啡肽(EOPs)的变化.方法选择健康自愿受试者40例,男女各20例,平均年龄(23.7±2.9)岁,研究设置二种模型即主观运动和被动运动.观察指标包括血浆中的亮氨酸脑啡肽(LEK)、β-内啡呔(β-END)和强啡呔(DYN).结果LEK、β-END、DYN在IE中均有不同程度的变化.结论在IE中LEK、DYN的变化程度较β-END明显(P＜0.01).     

安脑片联合奥拉西坦治疗脑卒中后血管性痴呆热毒内盛证临床研究

目的：观察安脑片联合奥拉西坦治疗脑卒中后血管性痴呆（VD）热毒内盛证的临床疗效。方法：按随机数字表法将100例脑卒中后VD热毒内盛证患者分为治疗组与对照组,每组50例。对照组采用奥拉西坦治疗,治疗组给予安脑片联合奥拉西坦治疗,2组均治疗4周。比较2组临床疗效与不良反应发生率。采用美国国立卫生研究院卒中量表（NIHSS）、简易智能精神状态检查量表（MMSE）、临床痴呆评定量表（CDR）、日常生活活动能力量表（ADL）评估神经功能、认知功能、痴呆程度和日常生活活动能力;比较双侧大脑中动脉（MCA）、基底动脉（BA）、大脑前动脉（ACA）、椎动脉（VA）平均血流速度,以及血清脑源性神经营养因子（BDNF）、血管内皮生长因子（VEGF）水平。结果：治疗后,治疗组临床疗效总有效率96.00%,高于对照组82.00%(P<0.05)。治疗后,2组NIHSS、CDR评分均较治疗前降低（P<0.05）,MMSE、ADL评分均较治疗前升高（P<0.05）;治疗组NIHSS、CDR评分均低于对照组（P<0.05）,MMSE、ADL评分均高于对照组（P<0.05）。治疗后,2组...     

ASO Author Reflections: National Analysis of Breast Surgery Malpractice Cases: A Teachable Moment?

Annals of Surgical Oncology -     

Cr Migration Potential and Species Properties in the Soil Profile from a Chromate Production Site in the Groundwater Depression Cone Area

The relationship between the migration process and speciation distribution of Cr is important for the risk assessment in the underground environment. In this work, soil columns were collected from the chromate production site, with a 40-year operation, in the groundwater depression cone area of North China plain. The relationship between chromium pollution features and the geochemical properties of soil was established, and the migration risk of Cr(VI) was assessed based on the Nemerow composite index and Hydrus-1D model. The maximum total Cr concentration in the chromium slag dumping site reached 907 mg/kg, and that in the chromate production workshop was more than 200 mg/kg across the depth. The migration of Cr might be accelerated in the soil with abundant Mn (236–1461 mg/kg) but scarce organic matters (<?0.45%). The Hydrus simulation indicated that Cr(VI) would reach a cumulative flux of 300–729 mg/cm² after 50 years.

     

Role of exercise treadmill in diagnosing hypertension

Using exercise treadmill testing (ETT), the authors undertook an evaluation of a patient who remained normotensive following termination of two-drug antihypertensive therapy. The hypertensive treadmill results suggest incomplete resolution of the hypertensive state and a potential role of the ETT in adding precision to the diagnosis of hypertension and monitoring control.     

造血干/祖细胞的体外扩增培养研究

利用旋转壁式生物反应器(Rotating wall vessel,RWV)体外培养脐带血干细胞,使其大量扩增,以满足临床应用对造血干/祖细胞的数量与质量要求。从脐带血分离得到的单个核细胞(Mononuclear cells,MNC)在T-flask中培养24h,之后接种到RWV反应器中,培养200h。每24h细胞计数,测量培养基的pH和渗透压变化;在144h和197h测CD34 细胞含量并做CFU-GM半固体培养。有核细胞(Nucleated cells,NC)与CD34 细胞在第197h,分别扩增了435.5±87.6倍和32.7±15.6倍,CFU-GM(Colony-forming unit-granulocyte/macrophage)细胞扩增了21.7±4.9倍。整个培养过程中,RWV反应器中的pH和渗透压都保持在造血细胞最佳的扩增条件内,pH基本保持在7.2~7.4之间,渗透压基本保持在290~310mmol/kg之间。由于旋转壁式生物反应器(RWV)结构上的特殊性,可以保证细胞在悬浮流动的状态下生长,很好地模拟了脐带中的造血微环境,使脐带血造血干细胞在该反应器中短期内得到大量扩增。