Results 21 to 30 of about 18,793 (138)

Effect of Different Methods of Analgesia on Analgesic after Total Knee Arthroplasty [PDF]

, 2016
目的比较不同镇痛方法（局部镇痛、硬膜外镇痛、静脉镇痛、髂筋膜间隙阻滞复合静脉镇痛）对全膝关节置换术（TKA）术后镇痛的效果影响。 方法择期单侧TKA患者80例，随机分为四组：局部镇痛组（L组）、静脉镇痛组（I组）、硬膜外镇痛组（E组）、髂筋膜间隙阻滞复合静脉镇痛组（F＋I组），术中均采用腰硬联合麻醉。记录术前、术毕1、8、24、48h静息VAS评分和术前、术毕8、24、48h运动VAS评分；记录患者术后其它镇痛药物（凯酚、丁丙诺菲皮贴）的额外使用次数；记录术前、术后8、24h的IL-6和皮质醇水平 ...
郑星星
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Transvaginal ultrasound for detecting parametrial involvement in suspected deep pelvic endometriosis: updated meta‐analysis

Ultrasound in Obstetrics &Gynecology, Volume 67, Issue 1, Page 7-14, January 2026.
ABSTRACT Objective To perform an updated meta‐analysis evaluating the diagnostic performance of transvaginal ultrasound (TVS) for detecting lateral parametrial involvement in women with suspected deep pelvic endometriosis. Methods A literature search was performed in the Web of Science, PubMed and Scopus databases from January 2021 to May 2024 for ...
J. L. Alcázar, C. Montoya, C. Candau, C. Catalan, R. Orozco, M. Á. Pascual, S. Ajossa, S. Guerriero   +7 more
wiley   +1 more source

不同攻角下超声速降落伞伞绳的影响研究 [PDF]

, 2017
文章基于一种简易＂浸入边界技术＂与流固耦合方法对超声速来流条件下的三维降落伞系统进行了数值模拟。研究中,降落伞系统包括前体和伞体,两者通过伞绳连接。文章的研究目的是分析不同攻角下降落伞伞绳对于降落伞系统周围复杂非定常流场的影响,以及对降落伞性能表现的影响。结果表明：在较小的前体和伞体距离下,由于攻角的影响,非定常流场结构呈现上下不对称,并且上下伞绳激波形成时间不同步。随着攻角的增加,上下面的伞绳激波形成时间出现推迟,并且有变弱的趋势。另外,由于攻角与伞绳的综合影响 ...
张德良, 汪运鹏, 温志湧, 薛晓鹏   +3 more
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Endometrial assessment in abnormal uterine bleeding: transvaginal ultrasound alone may not be good enough

Ultrasound in Obstetrics &Gynecology, Volume 67, Issue 1, Page 79-88, January 2026.
ABSTRACT Objective To evaluate the proportion of optimal assessments of endometrial thickness (ET) achieved by transvaginal ultrasound (TVS) compared with a multimodal (MM) sonographic approach in women with abnormal uterine bleeding (AUB). Methods This prospective observational study was a subset of the EPI‐SURE study conducted between June and ...
S. Nijjar, S. Kastora, A. Bajrami, S. Solangon, M. Widschwendter, D. Jurkovic   +5 more
wiley   +1 more source

变压器局部放电超声定位的现场应用

Gaoya dianqi, 2005
简述了超声波定位的工作原理,通过实例分析了中性点绝缘放电故障超声定位、围屏爬电故障超声定位、套管引线放电故障超声定位、分接引线放电故障超声定位和线圈绝缘压板及端部绝缘放电超声定位,并得出超声波定位的经验和体会。
葛为民
doaj  

Undetected cases after implementation of first‐trimester anomaly scan in low‐risk population: insights from the IMITAS study

Ultrasound in Obstetrics &Gynecology, Volume 67, Issue 1, Page 27-33, January 2026.
ABSTRACT Objective To assess the effectiveness of the first‐trimester anomaly scan (FTAS) performed as part of a centrally steered national screening program in The Netherlands by investigating false‐negative cases with a fetal structural anomaly that was not detected at the FTAS.
K. Bronsgeest, E. E. R. Lust, S. C. E. Zaaijer, L. Henneman, N. Crombag, C. M. Bilardo, R.‐J. H. Galjaard, E. Sikkel, A. K. K. Teunissen, M. N. Bekker, M. C. Haak, Collaborators, A. B. C. Coumans, A. Elvan‐Taşpınar, S. Galjaard, A. T. J. I. Go, E. van Leeuwen, G. T. R. Manten, E. Pajkrt   +18 more
wiley   +1 more source

Research on Key Issues in Eddy Current Nondestructive Evaluation of Residual Stress in Aluminum Alloy [PDF]

, 2015
铝合金作为制造业发展的基础材料，在航空航天、高速铁路、建筑工程、船舶制造、汽车工业等支柱产业中有着重要地位。残余应力往往是造成铝合金结构破坏的重要因素。有效的评价应力状态，特别是导致损伤出现的临界应力状态是评价设备结构强度、可靠性的重要依据。传统的无损检测方法已广泛应用于工程实际中，但大部分局限于对已成型的缺陷进行检测。对于可能导致损伤出现的隐性、不规律变化的残余应力状态的评价则较为困难。 目前，应用较多的残余应力检测法主要有盲孔法、X射线法、超声波法以及磁测法。这些方法在使用上都存在很大的局限性 ...
汪涛
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Performance of non‐invasive prenatal testing in vanishing‐twin and multiple pregnancies: results of TRIDENT‐2 study

Ultrasound in Obstetrics &Gynecology, Volume 66, Issue 6, Page 738-746, December 2025.
ABSTRACT Objective To evaluate the performance of non‐invasive prenatal testing (NIPT) in vanishing‐twin and multiple pregnancies. Methods This study was conducted as part of the TRIDENT‐2 study, in which NIPT was offered as a first‐tier screening test to women with a multiple pregnancy or vanishing‐twin pregnancy between 1 June 2020 and 31 March 2023 ...
J. C. A. van Eekhout, C. J. Bax, L. van Prooyen Schuurman, E. C. Becking, A. J. E. M. van der Ven, D. Van Opstal, E. M. J. Boon, M. V. E. Macville, M. N. Bekker, R. J. H. Galjaard, on behalf of the Dutch NIPT Consortium, E.A. Sistermans, L. Henneman, A. Polstra, E. Voorhoeve, S.L. Zelderen‐Bhola, E.M.J. Boon, M.P.R. Lombardi, M.C. Bakker, E.J. Bradley, E.M.J. Boon, C. Louwerens‐Zintel, M. Smit, M.C. van Maarle, M.B. Tan‐Sindhunata, K. van der Meij, H. Meij, C.J. Bax, E. Pajkrt, I.H. Linskens, L. Martin, J.T. Gitsels‐van der Wal, R. J. H. Galjaard, D. van Opstal, M.I. Srebniak, F.M. Sarquis Jehee, I.H.I.M. Hollink, F. Sleutels, W. de Valk, W.H. Deelen, A.M.S. Joosten, K.E.M. Diderich, M.E. Redeker, A.T.J.I. Go, M.F.C.M. Knapen, S. Galjaard, A.K.E. Prinsen, A.P.G. Braat, M.J.V. Hoffer, N.S. den Hollander, E.J.T. Verweij, M.C. Haak, M.V.E. Macville, S.J.C. Stevens, A. van der Wijngaard, L.H. Houben, M.A.A. van Esch‐Lennarts, L. Hamers, A.G.P. Jetten, S.A.I. Ghesquiere, B. de Koning, M. Zamani Esteki, C.J. Heesterbeek, C.E.M. de Die‐Smulders, H. Brunner, M.J. Pieters, A.B.C. Coumans, D.F.C.M. Smeets, B.H.W. Faas, D. Westra, M.M. Weiss, I. Derks‐Prinsen, I. Feenstra, M. van Rij, E. Sikkel, R.F. Suijkerbuijk, B. Sikkema‐Raddatz, I.M. van Langen, K. Bouman, L.K. Duin, G.H. Schuring‐Blom, K.D. Lichtenbelt, M.N. Bekker, E. van Vliet‐Lachotzki, J. Pot, A. J. E. M. van der Ven, S van 't Padje   +86 more
wiley   +1 more source

超声内镜和经腹超声造影对壶腹周围占位性病变的诊断价值比较

Zhongshan Daxue xuebao. Yixue kexue ban, 2018
【目的】为了比较超声内镜和经腹超声造影对壶腹周围占位性病变的诊断价值。【方法】回顾性分 析40例从2016年1月至2018年4月于我院行超声内镜和经腹超声造影检查，并手术或活检确诊为壶腹周围病 变的患者。比较超声内镜和经腹超声造影对壶腹周围占位性病变的检出率和诊断符合率。【结果】共入组患者 40例，其中壶腹部恶性病变有27例，良性病变13例。超声内镜对壶腹周围病变的检出率高于经腹超声造影检 查，分别为95.0%（38/40）和77.5%（31/40），差异有统计学意义（P=0.048 ...
陈瑜君, 梁美娟, 蓝文通, 梁瑾瑜, 谢晓燕   +4 more
doaj  

Analysis and Evaluation of Two-dimensional Hypersonic Inlet System Drag [PDF]

, 2015
进气道作为超燃冲压发动机的主要部件，其阻力特性对进气道优化选型、气动减阻、一体化设计等方面都具有重要影响。在高超声速试验中，阻力的直接测量相当困难，测量误差可达到50%以上，因此有必要采用间接方法来研究进气道的阻力特性。目前，学者们采用的阻力估算方法或多或少都存在一些缺陷，无法快速应用于高超声速进气道内部阻力的工程估算。 本文提出一种快速估算进气道阻力的方法，从进气道内控制体的动量定理出发，推导出进气道阻力特性的工程估算公式；重点研究了估算公式的数据处理形式，并分别用理论分析 ...
安平
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