Common Carotid Artery Flow Measured by 3-D Ultrasonic Vector Flow Imaging and Validated with Magnetic Resonance Imaging

Ultrasound (US) examination of the common carotid artery was compared with a through-plane magnetic resonance imaging (MRI) sequence to validate a recently proposed technique for 3-D US vector flow imaging. Data from the first volunteer examined were used as the training set, before volume flow and peak velocities were calculated for the remaining eight volunteers. Peak systolic velocities (PSVs) and volume flow obtained with 3-D US were, on average, 34% higher and 24% lower than those obtained with MRI, respectively. A high correlation was observed for PSV (r = 0.79), whereas a lower correlation was observed for volume flow (r = 0.43). The overall standard deviations were ±5.7% and ±5.7% for volume flow and PSV with 3-D US, compared with ±2.7% and ±3.2% for MRI. Finally, the data were re-processed with a change in the parameter settings for the echo-canceling filter to investigate its influence on overall performance. PSV was less affected by the re-processing, whereas the difference in volume flow between 3-D vector flow imaging and MRI was reduced to ?9%, and with an improved overall standard deviation of ±4.7%. The results illustrate the feasibility of using 3-D US for precise and angle-independent volume flow and PSV estimation in vivo.     

Identification of PTPN22, ST6GAL1 and JAZF1 as psoriasis risk genes demonstrates shared pathogenesis between psoriasis and diabetes

The biological connections between psoriasis and diabetes have been suggested by epidemiological, immunological and genetic studies. To identify additional shared susceptibility loci and investigate shared pathogenesis between these two diseases, we genotyped 89 reported diabetes susceptibility loci in 4456 psoriasis cases and 6027 controls of Chinese population using the MassARRAY system from Sequenom. We discovered three significant associations at rs6679677 on 1p13.2 (P=6.15×10^?5, OR=5.07), rs16861329 on 3q27.3 (P=2.02×10^?4, OR=0.87) and rs849135 on 7p15.1 (P=6.59×10^?9, OR=1.78), which suggested PTPN22, ST6GAL1 and JAZF1 as novel susceptibility genes for psoriasis in Chinese population. Our findings implicated the involvement of T‐cell receptor signalling pathway in the pathogenesis of psoriasis and further confirmed the shared genetic susceptibility between psoriasis and diabetes.     

孕妇应用硫酸镁对早产儿生长及预后的合理性评价

目的调查在孕妇应用硫酸镁和早产儿发生大脑性瘫痪及死亡等的关联，评价产前应用硫酸镁对早产儿的安全性及可行性。方法检索有关产前使用硫酸镁与早产儿发生大脑性瘫痪及死亡的病例对照研究文献进行Meta分析。结果符合研究纳入标准的文献9篇，共3800个研究例数，其中有5项研究是对孕妇应用硫酸镁有无导致早产儿发生死亡进行病例对照分析，4项研究对孕妇应用硫酸镁有无导致早产儿发生大脑性瘫痪进行病例对照分析。通过Meta分析，发现产前使用硫酸镁可以降低早产儿发生死亡的概率（OR：0．75；95％CI：0．59—0．95），而与早产儿发生大脑性瘫痪则无相关（OR：0．79；95％CI：0．60—1．04）。结论研究提示产前应用硫酸镁对早产儿发生死亡的几率有降低作用。     

限窗滑动线性傅里叶拟合在人体震颤预估滤波中的应用

背景:为抑制人体的震颤运动,各国研究人员试图设计出一套可穿戴机器人辅助抑震系统。目的:分析介绍了针对震颤滤波预估常用的线性傅里叶拟合算法及其衍生算法,并在此基础上提出了改进算法。方法:提出一种引入了加权线性傅里叶拟合算法变基频带限线性傅里叶拟合改进算法,迭代的过程中可随着对象的改变而发生改变,频带设定了一定约束条件以保证算法的滤波特性,限制了频带的变化范围,即限定了一个大的通频带,通频窗口只能在所设定的这个范围内进行滑动,所提出的这种算法为限窗滑动的线形傅里叶拟合。结果及结论:该算法的适应性得到了拓宽,对震颤滤波预估具有更强的适应性与准确性。     

Nationwide online social networking for cardiovascular care in Korea using Facebook

To examine the use of online social networking for cardiovascular care using Facebook. All posts and comments in a Facebook group between June 2011 and May 2012 were reviewed, and a survey was conducted. A total of 298 members participated. Of the 277 wall posts, 26.7% were question posts requesting rapid replies, and 50.5% were interesting cases shared with other members. The median response time for the question posts was 16 min (IQR 8–47), which tended to decrease as more members joined the group. Many members (37.4%) accessed the group more than once a day, and more than half (64%) monitored the group posts in real time with automatic notifications of new posts. Most members expressed confidence in the content posted. Facebook enables online social networking between physicians in near-real time and appears to be a useful tool for physicians to share clinical experience and request assistance in decision-making.     

替罗非班治疗支架辅助弹簧圈栓塞动脉瘤术中急性血栓形成

目的探讨动脉内灌注盐酸替罗非班在处理支架辅助弹簧圈栓塞颅内动脉瘤时术中急性血栓的有效性及安全性。方法收集2013年1月至2017年6月11例行颅内动脉瘤栓塞术中发生血栓患者,发生血栓后,均于微导管内靶向灌注盐酸替罗非班6ml,同时静脉泵注5ml/h,然后每5~10分钟造影观察血管溶通情况,直至血栓消失或血管开通。术后进行CT或MRI随访,观察有无脑梗塞或脑出血。结果 11例术中造影血管均完全再通,术后第1天、第7天及术后1月行头颅CT或MRI检查,均未发现与手术相关脑梗塞和脑出血的发生。结论支架辅助弹簧圈栓塞颅内动脉瘤时,术中出现急性血栓并发症时,经动脉靶向灌注盐酸替罗非班是一种安全、有效的方法。     

Evaluation of three methods for measurement of hemoglobin and calculated hemoglobin parameters with the Sysmex KX-21 and ADVIA 120 in Beagle dogs and Sprague Dawley (SD) rats

The Sysmex KX-21 uses a novel cyanide-free colorimetric method to detect hemoglobin (HGB) concentration. This measurement has not been compared with the cyanmethemoglobin method on the ADVIA 120 which is recommended as the reference method by the International Committee for Standardization in Hematology. Additionally, ADVIA 120 uses flow cytometric method to detect cellular HGB concentration. The aim of this study was to compare the three methods of HGB analysis on the two analyzers. Fresh K₃EDTA blood samples from 32 dogs and 27 rats were included. A complete blood count (CBC) was performed on each sample using the Sysmex KX-21 and ADVIA 120. Colorimetric and cellular HGB concentrations and all calculated variables based on HGB measurement were compared using linear regression, Passing–Bablok regression, and Bland–Altman plots, using the cyanmethemoglobin method as the reference method. In samples from both species, an excellent correlation was found between the HGB results measured with the cyanide-free method and the cyanide-based method (r?=?0.97); however, a slight mean proportional bias of 3.8 % (dogs) and 1.9 % (rats) was observed. The correlation of flow cytometric cellular HGB concentration and extracellular total HGB concentration on the ADVIA 120 was excellent (r?=?0.97), and no significant bias was observed. Additionally, excellent to fair agreement was evident for all calculated erythrocyte and HGB variables. Thus, the cyanide-free HGB method and flow cytometric method could be used with blood samples from dogs and rats; however, the proportional bias should be considered.