防静电滤材解决纸机液压润滑系统中静电问题

文章介绍了纸机液压、润滑系统发现的静电现象,分析了影响静电积累的因素,列举了目前所知道的产生静电现象的方式,详细描述了一种有效解决静电问题的方法:采用防静电滤材。并给出了相应的成功应用实例,同时,文章还对其他影响静电问题的因素进行了讨论。

Endoscopic ultrasound-fine needle biopsies of pancreatic lesions: Prospective study of histology quality using Franseen needle

BACKGROUND The introduction of fine needle biopsies(FNB)to clinical practice presents a changing trend towards histology in the endoscopic ultrasound-guided tissue acquisition(EUS-TA).AIM To evaluate the clinical performance of a new FNB needle,the 22-gauge(22G)Franseen needle,when sampling pancreatic solid lesions.METHODS Consecutive patients with an indication for EUS-TA for the assessment of pancreatic solid lesions were included in this prospective,single-center,singlearm trial.Each patient underwent a puncture of the lesion two times using the 22G Franseen needle and the obtained samples were directly placed into formalin for histological analysis.The primary study endpoint was the rate of high-quality obtained specimen.Secondary endpoints included the length and diameter of the core specimen,the diagnostic accuracy and the complication rate.RESULTS From June 2017 to December 2018,forty patients with pancreatic solid lesions(22 females;mean age 67.2 years)were enrolled.Tissue acquisition was achieved in all cases.High-quality histology,rated with Payne score 3,was obtained in 37/40 cases(92.5%)after two needle passes.The mean size of the acquired histological core tissue was 1.54 mm×0.39 mm.The diagnostic accuracy for the correct diagnosis was 85%(34/40).Only one adverse event was occurred,consisting of a self-limiting bleeding in the puncture site.CONCLUSION The 22G Franseen needle achieved according to our standardized protocol a high rate of histological core procurement,and a high diagnostic accuracy,with one minor adverse event reported.

自动分析动脉脉压中呼吸变化的新方法用于监测手术室内患者的容量反应性

背景人工计算的动脉脉压呼吸变化率（△PPman）是反映机械通气患者容量反应性的精确指标，然而该指标既往不能被持续监测。本研究中，我们建立一种能自动测算动脉脉压呼吸变化率△PPauto）的临床新方法。方法25例冠状动脉搭桥手术患者纳入本研究。△PPauto是基于一种自动检测规则系统、核光滑和秩排序滤波来持续显示的计算方法。所有患者均行全身麻醉、机械通气并插肺动脉漂浮导管进行监测。分别于手术过程中的8个不同时点，包括500ml的羟乙基淀粉扩容前后，同时记录△PPman及△PPauto。扩容有效者为扩容后患者的心脏指数较前增加大于15％。结果△PPman和△PPauto超过200对以上数据的相同性为0．7％±3．4％（均数±标准差）。17例患者对扩容有效。有效者手工测量的动脉脉压阈值为12％时其敏感性为88％、特异性为100％。有效者自动测量的动脉脉压阈值为10％时其敏感性为82％、特异性为88％。结论同△PPman相关的△PPauto是精确预测患者容量反应性的精确指标，并能持续监测动脉压。这种自动计算△PPauto的新方法具有潜在的临床应用价值。