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Whipple术后继发性草酸盐肾病
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作者 徐静 郝家琪 +1 位作者 唐晓晴 潘晓霞 《肾脏病与透析肾移植杂志》 CAS CSCD 2024年第2期187-191,共5页
67岁男性患者,3年前因胰头肿瘤行Whipple术,发病前数月服用中草药茶。肾脏损害表现为血清肌酐逐渐升高伴少量蛋白尿,肾脏病理表现为肾小管间质病变(慢性基础上急性加重),肾小管腔内较多偏振光下折光呈五彩斑斓的结晶沉积,最终诊断为继... 67岁男性患者,3年前因胰头肿瘤行Whipple术,发病前数月服用中草药茶。肾脏损害表现为血清肌酐逐渐升高伴少量蛋白尿,肾脏病理表现为肾小管间质病变(慢性基础上急性加重),肾小管腔内较多偏振光下折光呈五彩斑斓的结晶沉积,最终诊断为继发性高草酸尿症所致草酸盐肾病。给予低草酸饮食、多饮水、维生素B6及消胆胺等治疗3月后肾功能好转。 展开更多
关键词 高草酸尿症 草酸盐肾病 WHIPPLE术
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Benign stricture of bilioenteric anastomosis after Whipple withsynthetic polypropylene suture
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作者 A Michael Devane Christine MG Schammel 《Hepatobiliary & Pancreatic Diseases International》 SCIE CAS CSCD 2024年第1期103-105,共3页
To the Editor:Biliary stricture formation at the bilioenteric anastomosis is an infrequent complication(2%-3%)after pancreaticoduodenectomy;the average presentation is within 13-14 months(range from 1 month to 9 years... To the Editor:Biliary stricture formation at the bilioenteric anastomosis is an infrequent complication(2%-3%)after pancreaticoduodenectomy;the average presentation is within 13-14 months(range from 1 month to 9 years)after surgery[1,2].While the etiology is unknown,development of biliary stricture has shown to be more likely if a bile leak occurs in the postoperative period[3,4]and with younger patients[5]. 展开更多
关键词 STRICTURE ANASTOMOSIS WHIPPLE
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Pancreatic surgery and tertiary pancreatitis services warrant provision for support from a specialist diabetes team
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作者 Vasileios K Mavroeidis Jennifer Knapton +1 位作者 Francesca Saffioti Daniel L Morganstein 《World Journal of Diabetes》 SCIE 2024年第4期598-605,共8页
Pancreatic surgery units undertake several complex operations,albeit with consi-derable morbidity and mortality,as is the case for the management of complicated acute pancreatitis or chronic pancreatitis.The centralis... Pancreatic surgery units undertake several complex operations,albeit with consi-derable morbidity and mortality,as is the case for the management of complicated acute pancreatitis or chronic pancreatitis.The centralisation of pancreatic surgery services,with the development of designated large-volume centres,has contribu-ted to significantly improved outcomes.In this editorial,we discuss the complex associations between diabetes mellitus(DM)and pancreatic/periampullary disease in the context of pancreatic surgery and overall management of complex pancreatitis,highlighting the consequential needs and the indispensable role of specialist diabetes teams in support of tertiary pancreatic services.Type 3c pan-creatogenic DM,refers to DM developing in the setting of exocrine pancreatic disease,and its identification and management can be challenging,while the glycaemic control of such patients may affect their course of treatment and outcome.Adequate preoperative diabetes assessment is warranted to aid identification of patients who are likely to need commencement or escalation of glucose lowering therapy in the postoperative period.The incidence of new onset diabetes after pancreatic resection is widely variable in the literature,and depends on the type and extent of pancreatic resection,as is the case with pancreatic parenchymal loss in the context of severe pancreatitis.Early involvement of a specialist diabetes team is essential to ensure a holistic management.In the current era,large volume pancreatic surgery services commonly abide by the principles of enhanced recovery after surgery,with inclusion of provisions for optimisation of the perioperative glycaemic control,to improve outcomes.While various guidelines are available to aid perioperative management of DM,auditing and quality improvement platforms have highlighted deficiencies in the perioperative management of diabetic patients and areas of required improvement.The need for perioperative support of diabetic patients by specialist diabetes teams is uniformly underlined,a fact that becomes clearly more prominent at all different stages in the setting of pancreatic surgery and the management of complex pancreatitis.Therefore,pancreatic surgery and tertiary pancreatitis services must be designed with a provision for support from specialist diabetes teams.With the ongoing accumulation of evidence,it would be reasonable to consider the design of specific guidelines for the glycaemic management of these patients. 展开更多
关键词 PANCREATECTOMY PANCREATODUODENECTOMY Whipple’s PANCREATITIS Diabetes specialist Type 3c pancreatogenic diabetes mellitus
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胃肠改道伴胆肠吻合术后内镜下逆行胰胆管造影失败影响因素的单因素分析 被引量:1
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作者 郑炜 黄永辉 +6 位作者 常虹 姚炜 李柯 闫秀娥 张耀朋 王迎春 刘文正 《中国微创外科杂志》 CSCD 北大核心 2023年第3期173-179,共7页
目的探讨胃肠改道伴胆肠吻合术后内镜下逆行胰胆管造影(endoscopic retrograde cholangiopancreatography,ERCP)失败的影响因素。方法回顾性分析2005年1月~2021年12月我科80例Roux-en-Y和Whipple术后因胆系疾病行ERCP的临床资料,采用log... 目的探讨胃肠改道伴胆肠吻合术后内镜下逆行胰胆管造影(endoscopic retrograde cholangiopancreatography,ERCP)失败的影响因素。方法回顾性分析2005年1月~2021年12月我科80例Roux-en-Y和Whipple术后因胆系疾病行ERCP的临床资料,采用logistic回归分析胃肠改道伴胆肠吻合术后ERCP失败的影响因素。结果单因素分析显示因肿瘤手术治疗、术后多次ERCP、胃肠改道手术类型Roux-en-Y、保留胃和输入襻长度差异有显著性(P<0.05)。多因素logistic回归分析显示仅输入襻长度被纳入模型(OR=0.939,P=0.045)。将输入襻长度按≤45 cm、46~54 cm和≥55 cm进行分层,趋势χ2检验显示输入襻长度与ERCP失败风险存在剂量-反应关系(χ2趋势=7.587,P=0.006)。其中输入襻长度≥55 cm患者ERCP失败的风险是长度≤45 cm患者的40倍(OR=40.000,P=0.013),长度46~54 cm患者ERCP失败风险在二者之间。结论胃肠改道术伴胆肠吻合术后需行ERCP的患者,输入襻长度与ERCP失败风险存在剂量-反应关系,输入襻越长,ERCP失败风险越高。 展开更多
关键词 胆肠吻合 WHIPPLE术 胃肠改道 内镜下逆行胰胆管造影
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Laparoscopic pancreaticoduodenectomy with portal or superior mesenteric vein resection and reconstruction for pancreatic cancer:A single-center experience 被引量:2
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作者 Ming-Jian Ma He Cheng +2 位作者 Yu-Sheng Chen Xian-Jun Yu Chen Liu 《Hepatobiliary & Pancreatic Diseases International》 SCIE CAS CSCD 2023年第2期147-153,共7页
Background: Open pancreaticoduodenectomy(OPD) with portal or superior mesenteric vein resection and reconstruction has been applied in pancreatic cancer patients with tumor infiltration or adherence. However, it is co... Background: Open pancreaticoduodenectomy(OPD) with portal or superior mesenteric vein resection and reconstruction has been applied in pancreatic cancer patients with tumor infiltration or adherence. However, it is controversial whether laparoscopic pancreaticoduodenectomy(LPD) with major vascular resection and reconstruction is feasible. This study aimed to evaluate the safety and feasibility of LPD with major vascular resection compared with OPD with major vascular resection. Methods: We reviewed data for all pancreatic cancer patients undergoing LPD or OPD with vascular resection at Department of Pancreatic Surgery, Fudan University Shanghai Cancer Center, between February 2018 and May 2022. We compared the preoperative, intraoperative, and postoperative clinicopathological data of the two groups to conduct a comprehensive evaluation of LPD with major vascular resection. Results: A total of 63 patients underwent pancreaticoduodenectomy(PD) with portal or superior mesenteric vein resection and reconstruction, including 25 LPDs and 38 OPDs. The LPD group had less intraoperative blood loss(200 vs. 400 m L, P < 0.001), lower proportion of intraoperative blood transfusion(16.0% vs. 39.5%, P = 0.047), longer operation time(390 vs. 334 min, P = 0.004) and shorter postoperative hospital stay(11 vs. 14 days, P = 0.005). There was no perioperative death in all patients. There was no significant difference in the incidence of total postoperative complications, grade B/C postoperative pancreatic fistula, delayed gastric emptying and abdominal infection between the two groups. No postpancreatectomy hemorrhage nor bile leakage occurred during perioperative period. There was no significant difference in R0 resection rate and number of lymph nodes harvested between the two groups. Patency of reconstructed vessels in the two groups were 96.0% and 92.1%, respectively( P = 0.927). Conclusions: LPD with portal or superior mesenteric vein resection and reconstruction was safe, feasible and oncologically acceptable for selected patients with pancreatic cancer, and it can achieve similar or even better perioperative results compared to open approach. 展开更多
关键词 Laparoscopy Pancreaticoduodenectomy Whipple procedure Mesenteric veins Portal vein Pancreatic neoplasms
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An unusual case of severe pneumonia caused by Tropheryma whipplei combined with Legionella pneumophila 被引量:1
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作者 Zhenfeng Lu Aiping Zhang +1 位作者 Jingsheng Guo Haibin Ni 《World Journal of Emergency Medicine》 SCIE CAS CSCD 2023年第6期492-494,共3页
Community-acquired pneumonia is a common disease caused by a variety of pathogens.Tropheryma whipplei (T.whipplei) is a rare pathogenic bacterium,few cases have been reported.George Hoyt Whipple described Whipple’s d... Community-acquired pneumonia is a common disease caused by a variety of pathogens.Tropheryma whipplei (T.whipplei) is a rare pathogenic bacterium,few cases have been reported.George Hoyt Whipple described Whipple’s disease as a chronic infectious disease affecting multiple organ systems for the first time in 1907. 展开更多
关键词 PNEUMONIA WHIPPLE
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轻型合金超高速冲击防护性能和失效机理研究进展
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作者 张晓琼 王涛 《包装工程》 CAS 北大核心 2023年第21期24-35,共12页
目的系统总结目前关于轻型金属合金及其复合层板在超高速冲击载荷作用下的冲击损伤模式和失效机理研究进展。方法搜集整理大量有关研究文献,从实验技术、轻型合金的超高速冲击下可视性的实验现象,以及高应变率加载条件下材料的微观组织... 目的系统总结目前关于轻型金属合金及其复合层板在超高速冲击载荷作用下的冲击损伤模式和失效机理研究进展。方法搜集整理大量有关研究文献,从实验技术、轻型合金的超高速冲击下可视性的实验现象,以及高应变率加载条件下材料的微观组织结构演化机理三方面对最新研究进展进行梳理与总结。结论指出了目前轻型合金超高速冲击性能研究中的不足,并提出了未来研究方向的建议,为该领域轻质防护结构设计未来的研究方向提供了参考。 展开更多
关键词 铝合金 镁合金 钛合金 超高速撞击 Whipple结构 冲击防护 失效机理
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Diagnosis and treatment of Whipple disease after kidney transplantation:A case report
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作者 Qian Chen Yu-Lin Niu Tao Zhang 《World Journal of Clinical Cases》 SCIE 2023年第25期6019-6024,共6页
BACKGROUND Kidney transplantation is the standard treatment for end-stage renal disease.Particularly,rare and specific pathogenic infections which are asymptomatic are often difficult to diagnose,causing delayed and i... BACKGROUND Kidney transplantation is the standard treatment for end-stage renal disease.Particularly,rare and specific pathogenic infections which are asymptomatic are often difficult to diagnose,causing delayed and ineffective treatment and thus seriously affecting prognosis.Tropheryma whipplei(T.whipplei)is a Gram-positive actinomycete widely found in soil,sewage,and other external environments and is present in the population as an asymptomatic pathogen.There is relatively little documented research on T.whipplei in renal transplant patients,and there are no uniform criteria for treating this group of post-transplant patients.This article describes the treatment of a 42-year-old individual with post-transplant T.whipplei infection following kidney transplantation.CASE SUMMARY To analyze clinical features of Whipple’s disease and summarize its diagnosis and treatment effects after renal transplantation.Clinical data of a Whipple’s disease patient treated in the affiliated hospital of Guizhou Medical University were collected and assessed retrospectively.The treatment outcomes and clinical experience were then summarized via literature review.The patient was admitted to the hospital due to recurrent diarrhea for 1 mo,shortness of breath,and 1 wk of fever,after 3 years of renal transplantation.The symptoms of the digestive and respiratory systems were not significantly improved after adjusting immunosuppressive regimen and anti-diarrheal,empirical antibiotic treatments.Bronchoscopic alveolar fluid was collected for meta-genomic next-generation sequencing(mNGS).The deoxyribonucleic acid sequence of Tropheryma whipplei was detected,and Whipple’s disease was diagnosed.Meropenem,ceftriaxone,and other symptomatic treatments were given,and water-electrolyte balance was maintained.Symptoms resolved quickly,and the patient was discharged after 20 d of hospitalization.The compound sulfamethoxazole tablet was continued for 3 mo after discharge.No diarrhea,fever,and other symptoms occurred during the 6-month follow-up.CONCLUSION Whipple’s disease is rare,with no specific symptoms,which makes diagnosis difficult.Polymerase chain reaction or mNGS should be immediately performed when the disease is suspected to confirm the diagnosis. 展开更多
关键词 Kidney transplantation IMMUNOSUPPRESSION Whipple disease Whipple’s nutrient barrier Macrogenomics secondgeneration sequencing technology Case report
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Radiation therapy prior to a pancreaticoduodenectomy for adenocarcinoma is associated with longer operative times and higher blood loss
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作者 Krist Aploks Minha Kim +6 位作者 Stephanie Stroever Alexander Ostapenko Young Bo Sim Ashwinkumar Sooriyakumar Arash Rahimi-Ardabily Ramanathan Seshadri Xiang Da Dong 《World Journal of Gastrointestinal Surgery》 SCIE 2023年第8期1663-1672,共10页
BACKGROUND Pancreatic adenocarcinoma is currently the fourth leading cause of cancer-related deaths in the United States.In patients with“borderline resectable”disease,current National Comprehensive Cancer Center gu... BACKGROUND Pancreatic adenocarcinoma is currently the fourth leading cause of cancer-related deaths in the United States.In patients with“borderline resectable”disease,current National Comprehensive Cancer Center guidelines recommend the use of neoadjuvant chemoradiation prior to a pancreaticoduodenectomy.Although neoadjuvant radiotherapy may improve negative margin resection rate,it is theorized that its administration increases operative times and complexity.AIM To investigate the association between neoadjuvant radiotherapy and 30-d morbidity and mortality outcomes among patients receiving a pancreaticoduodenectomy for pancreatic adenocarcinoma.METHODS Patients listed in the 2015-2019 National Surgery Quality Improvement Program data set,who received a pancreaticoduodenectomy for pancreatic adenocarcinoma,were divided into two groups based off neoadjuvant radiotherapy status.Multivariable regression was used to determine if there is a significant correlation between neoadjuvant radiotherapy,perioperative blood transfusion status,total operative time,and other perioperative outcomes.RESULTS Of the 11458 patients included in the study,1470(12.8%)underwent neoadjuvant radiotherapy.Patients who received neoadjuvant radiotherapy were significantly more likely to require a perioperative blood transfusion[adjusted odds ratio(aOR)=1.58,95%confidence interval(CI):1.37-1.82;P<0.001]and have longer surgeries(insulin receptor-related receptor=1.14,95%CI:1.11-1.16;P<0.001),while simultaneously having lower rates of organ space infections(aOR=0.80,95%CI:0.66-0.97;P=0.02)and pancreatic fistula formation(aOR=0.50,95%CI:0.40-0.63;P<0.001)compared to those who underwent surgery alone.CONCLUSION Neoadjuvant radiotherapy,while not associated with increased mortality,will impact the complexity of surgical resection in patients with pancreatic adenocarcinoma. 展开更多
关键词 PANCREATICODUODENECTOMY Pancreatic adenocarcinoma Neoadjuvant chemoradiation National Surgery Quality Improvement Program Whipple procedure Operative time
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需注意的规范医学用词
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《中国中西医结合外科杂志》 CAS 2023年第6期862-862,共1页
黏膜、腹膜刺激征、综合征、体征、气腹征、指征、Whipple三联征、并发症、急腹症、门静脉高压症、适应证、禁忌证、症候、腹膜返折、胃食管反流、纵隔、直肠阴道隔、膀胱阴道隔.
关键词 腹膜刺激征 门静脉高压症 胃食管反流 直肠阴道隔 腹膜返折 禁忌证 WHIPPLE三联征 急腹症
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玄武岩纤维布Whipple防护结构超高速撞击损伤分析 被引量:13
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作者 哈跃 庞宝君 +1 位作者 管公顺 张伟 《哈尔滨工业大学学报》 EI CAS CSCD 北大核心 2007年第5期779-782,共4页
针对加入玄武岩纤维织物对Whipple防护结构损伤产生的影响进行了实验研究.探讨了将玄武岩纤维织物作为航天器空间碎片超高速撞击损伤防护结构的增强材料用于航天领域的可行性.实验采用的基本构形为Whipple防护结构,玄武岩纤维布按不同... 针对加入玄武岩纤维织物对Whipple防护结构损伤产生的影响进行了实验研究.探讨了将玄武岩纤维织物作为航天器空间碎片超高速撞击损伤防护结构的增强材料用于航天领域的可行性.实验采用的基本构形为Whipple防护结构,玄武岩纤维布按不同方案布置在结构中.实验分析表明,玄武岩纤维布的防护作用在于:其发生击穿破坏时,击穿孔处的纤维束产生的断裂和孔边处纤维束产生的变形消耗和吸收了撞击物的撞击能量;破坏时,玄武岩纤维束中逐次断裂的纤维丝与撞击物的撞击除了对撞击物产生切割作用外还在撞击物中产生高频的间歇冲击波,两者都对撞击物产生碎化作用;玄武岩纤维布自身的破坏不会再产生新的大碎片. 展开更多
关键词 空间碎片 高速撞击 WHIPPLE防护结构 玄武岩纤维
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铝合金Whipple防护结构高速撞击实验研究 被引量:17
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作者 管公顺 庞宝君 +1 位作者 哈跃 张伟 《爆炸与冲击》 EI CAS CSCD 北大核心 2005年第5期461-466,共6页
为了掌握航天器防护结构受空间碎片高速撞击的损伤破坏模式及其防护性能,采用二级轻气炮发射球形弹丸,对铝合金Whipple防护结构进行高速撞击实验研究.根据实验结果分析了铝合金Whipple防护结构的防护屏和舱壁在不同速度区间的损伤模式特... 为了掌握航天器防护结构受空间碎片高速撞击的损伤破坏模式及其防护性能,采用二级轻气炮发射球形弹丸,对铝合金Whipple防护结构进行高速撞击实验研究.根据实验结果分析了铝合金Whipple防护结构的防护屏和舱壁在不同速度区间的损伤模式特征,以及薄铝板防护屏高速撞击穿孔和舱壁弹坑分布随弹丸直径、弹丸撞击速度变化的规律.通过固定弹丸直径,改变弹丸撞击速度,寻找临界撞击速度的方法获得了铝合金Whipple防护结构在0.5~5.5 km/s撞击速度区间内的撞击极限曲线,并与由Christiansen撞击极限方程得到的撞击极限曲线进行了比较,结果表明,实验最小临界弹丸直径略大于预测值. 展开更多
关键词 爆炸力学 损伤模式 高速撞击 WHIPPLE防护结构 撞击极限曲线
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铝球弹丸超高速正撞击铝Whipple防护结构舱壁的损伤分析 被引量:7
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作者 管公顺 庞宝君 +2 位作者 哈跃 盖芳芳 张伟 《兵工学报》 EI CAS CSCD 北大核心 2007年第1期94-100,共7页
低地球轨道上的航天器易受到微流星体及空间碎片的超高速撞击,导致其严重的损伤甚至灾难性的失效。撞击损伤特性研究是航天器防护设计的一个重要问题。采用实验和数值仿真方法,对铝球弹丸超高速正撞击铝合金Whipple防护结构的舱壁损伤... 低地球轨道上的航天器易受到微流星体及空间碎片的超高速撞击,导致其严重的损伤甚至灾难性的失效。撞击损伤特性研究是航天器防护设计的一个重要问题。采用实验和数值仿真方法,对铝球弹丸超高速正撞击铝合金Whipple防护结构的舱壁损伤特性进行了研究,从而模拟空间碎片对航天器舱壁的超高速撞击作用,并利用AUTODYN-2D软件获得的仿真结果与实验结果进行比较,二者具有较好的一致性。分析了铝合金Whipple防护结构舱壁撞击损伤随弹丸直径、撞击速度和防护间距变化的规律,指出影响舱壁撞击损伤特性的主要因素。 展开更多
关键词 爆炸力学 超高速撞击 WHIPPLE防护结构 损伤 数值模拟
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航天器波纹防护屏高速撞击实验研究 被引量:8
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作者 张伟 庞宝君 +1 位作者 张泽华 马文来 《宇航学报》 EI CSCD 北大核心 2000年第1期79-84,共6页
微流量及空间碎片的高速撞击威胁着航天器的安全运行 ,导致其严重的损伤和灾难性的失效。本文给出和分析了柱状弹丸高速撞击铝合金波纹防护屏 Whipple防护实验研究的结果。结果表明 :波纹防护屏具有分散不同入射角弹丸高速撞击所产生碎... 微流量及空间碎片的高速撞击威胁着航天器的安全运行 ,导致其严重的损伤和灾难性的失效。本文给出和分析了柱状弹丸高速撞击铝合金波纹防护屏 Whipple防护实验研究的结果。结果表明 :波纹防护屏具有分散不同入射角弹丸高速撞击所产生碎片云损伤能量的特性 ,并能降低弹丸滑弹碎片对航天器外部结构和子系统的损伤 ,该防护结构的防护性能优于铝合金板防护屏 Whipple防护。 展开更多
关键词 航天器 Whipple防护 波纹防护屏 高速撞击 实验
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超高速撞击弹丸形状效应数值模拟研究 被引量:8
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作者 马文来 张伟 +1 位作者 庞宝君 陈海辉 《宇航学报》 EI CAS CSCD 北大核心 2006年第6期1174-1177,1232,共5页
为保证在轨航天器的安全运行,微流星体和空间碎片的防护成为现有航天器,特别是长寿命、大尺寸航天器设计时必须考虑的问题。本文采用AUTODYN软件进行了不同形状弹丸超高速撞击whipple防护结构的数值模拟,对不同形状弹丸撞击Whipple防护... 为保证在轨航天器的安全运行,微流星体和空间碎片的防护成为现有航天器,特别是长寿命、大尺寸航天器设计时必须考虑的问题。本文采用AUTODYN软件进行了不同形状弹丸超高速撞击whipple防护结构的数值模拟,对不同形状弹丸撞击Whipple防护结构的撞击极限曲线进行了比较,分析了各形状弹丸撞击防护屏后形成的碎片云状态,以及分析了各撞击极限曲线之间差异的原因。不同形状弹丸对Whipple防护结构的损伤能力有很大差异,弹丸破碎和碎片云分散程度随弹丸速度、长径比和撞击方向的改变而改变。 展开更多
关键词 Whipple防护 超高速撞击 形状效应 撞击极限曲线 数值模拟
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胰岛素瘤的影像学评价(附28例报告) 被引量:8
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作者 徐增斌 阮凌翔 +2 位作者 彭志毅 许顺良 章熙道 《临床放射学杂志》 CSCD 北大核心 2002年第11期861-864,共4页
目的 探讨多种影像学方法在胰岛素瘤术前定位诊断中的价值。资料与方法  2 8例经手术病理证实的胰岛素瘤患者于术前做B超和DSA检查 ,2 2例行胰腺CT扫描 ,10例行MRI检查。结果  4种影像学方法对胰岛素瘤术前定位诊断准确率分别为 :DSA... 目的 探讨多种影像学方法在胰岛素瘤术前定位诊断中的价值。资料与方法  2 8例经手术病理证实的胰岛素瘤患者于术前做B超和DSA检查 ,2 2例行胰腺CT扫描 ,10例行MRI检查。结果  4种影像学方法对胰岛素瘤术前定位诊断准确率分别为 :DSA 82 % (2 3/ 2 8) ,超声 5 7% (16 / 2 8) ,CT 4 1% (9/ 2 2 ) ,MRI 90 % (9/ 10 )。DSA与超声、MRI相结合使本组术前定位诊断准确率达 93% (2 6 / 2 8)。结论 MRI和DSA是胰岛素瘤术前定位诊断准确率高而有效的方法。对临床有Whipple三联征患者 ,应首先选用超声和MRI或螺旋CT检查 ,特别是MRI或螺旋CT薄层快速动态增强扫描。当上述无创检查方法仍不能明确诊断时 ,可进一步行胰血管造影 。 展开更多
关键词 胰岛素瘤 WHIPPLE三联征 MRI诊断 CT诊断 DSA诊断 胰血管造影
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超高速碰撞下Whipple防护结构的数值模拟 被引量:11
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作者 阎晓军 张玉珠 聂景旭 《宇航学报》 EI CAS CSCD 北大核心 2002年第5期81-84,共4页
结合有关试验结果 ,本文利用有限元方法对 Whipple防护结构在空间碎片高速碰撞下的过程进行了三维数值仿真。计算结果表明 :对于 Whipple防护结构 ,选用适当的材料失效准则 ,计算结果和试验基本接近。因此 ,在 PAM- SHOCK软件的基础上 ... 结合有关试验结果 ,本文利用有限元方法对 Whipple防护结构在空间碎片高速碰撞下的过程进行了三维数值仿真。计算结果表明 :对于 Whipple防护结构 ,选用适当的材料失效准则 ,计算结果和试验基本接近。因此 ,在 PAM- SHOCK软件的基础上 ,通过适量的验证试验 。 展开更多
关键词 WHIPPLE防护结构 数值模拟 航天飞行 空间碰撞
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蜂窝夹芯板与Whipple结构对撞击能量吸收与耗散的特性比较 被引量:6
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作者 张志远 迟润强 +1 位作者 庞宝君 管公顺 《应用力学学报》 CAS CSCD 北大核心 2016年第5期754-759,931,共6页
通过数值仿真模拟弹丸高速撞击蜂窝夹芯板和Whipple结构,研究蜂窝芯对弹丸碎片云形态的影响;并研究了弹丸、蜂窝夹芯板、Whipple结构的能量吸收与耗散。结果表明:弹丸撞击蜂窝夹芯板后碎片云形态呈近似椭球体,且长半轴明显较长,而弹丸撞... 通过数值仿真模拟弹丸高速撞击蜂窝夹芯板和Whipple结构,研究蜂窝芯对弹丸碎片云形态的影响;并研究了弹丸、蜂窝夹芯板、Whipple结构的能量吸收与耗散。结果表明:弹丸撞击蜂窝夹芯板后碎片云形态呈近似椭球体,且长半轴明显较长,而弹丸撞击Whipple结构的碎片云形态呈近似球体;蜂窝芯吸收的能量随弹丸的破碎程度的增强而增加;弹丸能量衰减主要发生在撞击蜂窝夹芯板的前后面板和Whipple结构的两层板,蜂窝芯的吸能作用使得Whipple结构吸收的能量高于蜂窝夹心板面板吸收的能量。 展开更多
关键词 蜂窝夹芯板 Whipple结构 能量
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球形弹丸超高速正撞击Whipple防护结构损伤分析 被引量:7
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作者 林木森 庞宝君 +1 位作者 龚海鹏 张伟 《宇航学报》 EI CAS CSCD 北大核心 2009年第4期1686-1692,共7页
为了掌握航天器防护结构受空间碎片高速撞击的防护性能及其损伤破坏模式,采用二级轻气炮结合高速X光照相系统,对球形弹丸超高速正撞击5A06铝合金Whipple防护结构进行了试验研究。根据试验结果分析了铝合金Whipple防护结构的防护屏和舱... 为了掌握航天器防护结构受空间碎片高速撞击的防护性能及其损伤破坏模式,采用二级轻气炮结合高速X光照相系统,对球形弹丸超高速正撞击5A06铝合金Whipple防护结构进行了试验研究。根据试验结果分析了铝合金Whipple防护结构的防护屏和舱壁在弹丸撞击速度为2.0~5.2km/s、弹丸直径为4mm和6.35mm及防护屏厚度为0.5mm、1.5mm、2mm和3mm区间的损伤模式,总结了防护屏穿孔和舱壁损伤随弹丸撞击速度、弹丸直径以及防护屏厚度变化的规律。根据高速X光照片分析了碎片云速度和形态的变化趋势,进而从碎片云角度对舱壁损伤模式进行了分析。 展开更多
关键词 爆炸力学 超高速撞击 损伤模式 WHIPPLE防护结构 5A06铝合金
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多孔脆性火山岩弹丸高速撞击航天器典型防护结构试验和仿真分析 被引量:4
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作者 朱凼凼 孙英超 +1 位作者 庞宝君 贾斌 《振动与冲击》 EI CSCD 北大核心 2010年第7期213-215,共3页
采用多孔脆性火山岩弹丸,对航天器典型Whipple防护结构进行高速撞击试验和仿真计算,分析表明在低速撞击阶段,造成前板铝脱落,但后板并没有发生剥离现象,当撞击试验速度达到2.78km/s时,后板出现剥离现象,此速度可近似为Whipple防护结构... 采用多孔脆性火山岩弹丸,对航天器典型Whipple防护结构进行高速撞击试验和仿真计算,分析表明在低速撞击阶段,造成前板铝脱落,但后板并没有发生剥离现象,当撞击试验速度达到2.78km/s时,后板出现剥离现象,此速度可近似为Whipple防护结构遭到破坏的临界速度,试验与仿真结果基本吻合。 展开更多
关键词 多孔脆性 火山岩 高速撞击 WHIPPLE防护结构 损伤特性
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