Blood pressure and heart rate in parkinsonian patients with and without wearing-off

Our study aimed to investigate the cardiovascular autonomic regulation related to the wearing-off phenomenon in Parkinson's disease (PD). We measured blood pressure (BP) and heart rate (HR) at rest and during orthostatic test in 16 patients with PD with wearing-off and in 15 patients with PD without wearing-off both before (baseline) and repetitively at 1-h intervals for up to 4 h after the morning PD medication dose.
The patients with wearing-off had fluctuation of BP during the observation period, BP increasing when the motor performance worsened and vice versa. The mean supine BP was at its highest at the baseline measurement (patients with wearing-off, 145 ± 18 mmHg; patients without wearing-off, 138 ± 17 mmHg), fell during the first hour (patients with wearing-off, 119 ± 17 mmHg; patients without wearing-off, 126 ± 18 mmHg), and then rose again toward the end of the observation period (patients with wearing-off, 136 ± 15 mmHg; patients without wearing-off, 138 ± 18 mmHg). This BP change was statistically significant only in PD patients with wearing-off ( P  < 0.001).
In conclusion, BP seems to fluctuate with motor impairment in PD patients with wearing-off. This fluctuation may represent autonomic dysfunction caused by the PD process itself, the effect of PD medication, or both.     

Ca2+-induced excess capacitance fluctuation studied by phase-sensitive detection method in exocrine pancreatic acinar cells

A phase-sensitive detection method in combination with whole-cell voltage-clamp was applied to exocrine pancreatic acinar cells from rat. The results have shown that cell-aialysis with a solution containing 5×10^–7 M Ca²⁺ induces stp-wise changes in cell capacitance. The size distribution of increasing and decreasing capacitance steps is compatible with the idea that these capacitance steps are the results of individual granular fusion and retrieval events. This method may enable experiments studying the exo-and endo-cytotic mechanisms in morphologically polarized secretory cells.     

The SIMULTEST approach for testing mutagens in the Salmonella microtitre fluctuation assay

The concept of combining several histidine-dependent Salmonella strains in a single test, the SIMULTEST, has been applied to the microtitre fluctuation test. The activity of five mutagens was determined in strains TA97, TA98, TA100, and TA102 individually as well as in a SIMULTEST mixture. All five compounds were mutagenic in the SIMULTEST, demonstrating the utility of this time and labour-saving approach of combining strains for testing with this method. The microtitre fluctuation SIMULTEST results were quantitatively comparable to those of the SIMULTEST Salmonella/microsome plate test. The microtitre fluctuation test compared with the plate incorporation assay generally showed more favourable "sensitivity" and "quantity" indices in that four of the five chemicals tested in the fluctuation test were mutagenic at lower doses than in the plate test.     

吉林省中朝边境地区吸血虻的调查研究

目的调查吉林省中朝边境地区4市(县)的吸血虻种分布及种群组成。方法牛诱法采虻。结果在吉林省中朝边境地区的珲春、图门、安图、敦化4市(县)采获吸血虻5属39种,依次分布为31、27、24和28种。采获的虻中短小瘤虻占20.5%,骚扰黄虻占15.6%,痣翅瘤虻占14.1%。痣翅瘤虻(6月中旬)、短小瘤虻(6月中旬)、僻氏虻(7月中旬)、骚扰黄虻(8月上旬)和黑胫瘤虻(8月上旬)在整个活动季节均出现1次高峰。结论优势种为短小瘤虻、骚扰黄虻和痣翅瘤虻。不同月份的虻种群组成有所不同。     

低频重复经颅磁刺激对尿毒症失眠患者的临床研究

【摘要】目的 研究重复经颅磁刺激（rTMS）对尿毒症失眠患者的疗效及静息态功能磁共振成像（rs fMRI）下大脑自发神经活动低频振幅（ALFF）的变化。方法 选取2015年3月~2016年6月在南充市中心医院血液净化中心进行维持性血液透析的尿毒症失眠患者31例,分为rTMS治疗组（n=21）与空白对照组（n=10）。rTMS治疗组接受rTMS治疗,在治疗前后采用匹兹堡睡眠质量指数量表（PSQI）、阿森斯失眠量表（AIS）进行评分及rs fMRI图像采集。空白对照组不接受rTMS治疗,不采集rs fMRI图像,其余与rTMS治疗组相同。对比分析rTMS治疗组治疗前后睡眠量表评分及低频振幅（ALFF）的差异。结果 rTMS组治疗15d后,与治疗前及空白对照组入组15d后相比,尿毒症失眠患者睡眠情况明显改善。rTMS组治疗前后ALFF值比较,差异有统计学意义（P＜005）,其中双侧眶额叶、双侧杏仁核、左侧海马、左侧前扣带回的ALFF值增高,双侧脑岛的ALFF值降低。结论 低频可rTMS通过影响大脑相关脑区神经活动强弱来治疗尿毒症患者的失眠,改善睡眠结构。     

Usefulness of Left Ventricular Vortex Flow Analysis for Predicting Clinical Outcomes in Patients with Chronic Heart Failure: A Quantitative Vorticity Imaging Study Using Contrast Echocardiography

The goal of the study described here was to evaluate whether left ventricular vortex flow parameters, as assessed by contrast echocardiography, enhance prediction of major adverse cardiac events (MACE) in patients with chronic heart failure and systolic dysfunction. A total of 75 patients with contrast echocardiography and systolic dysfunction (ejection fraction ≤45%) were prospectively enrolled and underwent vortex flow analysis with particle image velocimetry using contrast echocardiography. Vortex flow parameters, including kinetic energy fluctuation (KEF), were evaluated. Patients were followed up for a primary endpoint of MACE that comprised hospital admission for cardiovascular causes and cardiac deaths. Across a median 277-d follow-up, 29 patients (38.7%) experienced MACE. Among these, the incidence of diabetes and the E/e' ratio were significantly higher in patients with MACE than in those without, whereas the hemoglobin level and ejection fraction were significantly lower. KEF was significantly lower in patients with MACE. In the multivariate analysis, higher KEF was associated with a lower risk of MACE (hazard ratio?=?0.18, 95% confidence interval: 0.04–0.97, p?=?0.046). The addition of KEF to a model with conventional parameters (e.g., age, diabetes, ejection fraction and the E/e' ratio) significantly improved the model's discrimination. Elevations in the quantitative left ventricular vortex flow parameter, KEF, as determined by contrast echocardiography, are associated with a lower risk of MACE and improved functional status among patients with chronic heart failure.     

对旋轴流通风机流场预测及两级电机功率匹配研究

对旋风机是矿井通风系统的重要组成部分，其安全稳定的运行是煤矿工人生命安全的保障。针对在长距离送风状态下，对旋风机风量显著减小、前后两级电机功率匹配难度加大的问题，依据流体动力学原理(Computational Fluid Dynamics，CFD)，采用对旋风机全域流体场数值模拟方法，对两级对旋叶轮性能与两级电动机性能的“线(点对点)”匹配进行研究。仿真结果揭示了对旋轴流通风机流场内部气流的真实流动规律以及两级电机轴功率匹配情况。将数值模拟结果和实验数据进行对比，验证该数值模拟方法的准确性，同时验证通过改变叶片安装角提高风机运行效率的可行性，为高性能对旋风机调速控制和节能控制提供理论依据。     

Glucose series complexity in hypertensive patients

Nonlinear methods have been applied to the analysis of biological signals. Complexity analysis of glucose time series may be a useful tool for the study of the initial phases of glucoregulatory dysfunction. This observational, cross-sectional study was performed in patients with essential hypertension. Glucose complexity was measured with detrended fluctuation analysis (DFA), and glucose variability was measured by the mean amplitudes of glycemic excursion (MAGE). We included 91 patients with a mean age of 59 ± 10 years. We found significant correlations for the number of metabolic syndrome (MS)-defining criteria with DFA (r = 0.233, P = .026) and MAGE (r = 0.396, P < .0001). DFA differed significantly between patients who complied with MS and those who did not (1.44 vs. 1.39, P = .018). The MAGE (f = 5.3, P = .006), diastolic blood pressures (f = 4.1, P = .018), and homeostasis model assessment indices (f = 4.2, P = .018) differed between the DFA tertiles. Multivariate analysis revealed that the only independent determinants of the DFA values were MAGE (β coefficient = 0.002, 95% confidence interval: 0.001–0.004, P = .001) and abdominal circumference (β coefficient = 0.002, 95% confidence interval: 0.000015–0.004, P = .048). In our population, DFA was associated with MS and a number of MS criteria. Complexity analysis seemed to be capable of detecting differences in variables that are arguably related to the risk of the development of type 2 diabetes.