Transcatheter Arterial Embolization for the treatment of upper gastrointestinal bleeding

M. Habib, Majed Alshounat
{"title":"Transcatheter Arterial Embolization for the treatment of upper gastrointestinal bleeding","authors":"M. Habib, Majed Alshounat","doi":"10.29328/JOURNAL.ACGH.1001008","DOIUrl":null,"url":null,"abstract":"Background: Transcatheter arterial embolization can be used for patients with recurrent bleeding from the upper gastrointestinal tract after failed endoscopic treatment. Our aim to identify the clinical and technical factors that infl uenced the outcome of transcatheter embolization for therapy of upper gastrointestinal bleeding after failed surgery or after failed endoscopic treatment in high risk surgical patients. Methods: We performed a prospective study to analysis of the 15 patients who underwent Transcatheter arterial embolization for nonvariceal upper gastrointestinal bleeding at Alshifa hospital from January 2015 to March 2019. The following variables were recorded: demographic data, time from bleeding start to TAE, units of packed red cells before TAE and units of packed plasma before Transcatheter arterial embolization and we analysis 30 days rebleeding rates and mortality. Results: Patients treated with Transcatheter arterial embolization (median age: 62 years, range: 14–79 years).The technical success rate of the embolization procedure was 100%. Time from bleeding start to TAE was 2.1 (1-4) days , units of packed red cells before Transcatheter arterial embolization was 12.8 (4-22) packed and units of packed plasma was 3.2 (2-5) packed. Following 30 days after embolization, 2 (13%) patients had repeated bleeding and 3 (20.0%) patients died. Conclusion: In our experience, arterial embolization is a safe and effective treatment method for upper gastrointestinal bleeding and a possible alternative to surgery for high-risk patients. Research Article Transcatheter Arterial Embolization for the treatment of upper gastrointestinal bleeding Mohammed Habib1* and Majed Alshounat2 1Consultant, Interventional Cardiologist, Head of Cardiology Department, Alshifa Hospital, Gaza, Palestine 2Consultant, interventional Cardiologist. Alshifa Hospital, Gaza, Palestine *Address for Correspondence: Mohammed Habib, MD, PhD, Alshifa Hospital, Cardiology Department, Gaza, Palestine, Tel: 00972599514060; Email: cardiomohammad@yahoo.com Submitted: 22 May 2019 Approved: 06 June 2019 Published: 07 June 2019 Copyright: © 2019 Habib M, et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited How to cite this article: Habib M, Alshounat M. Transcatheter Arterial Embolization for the treatment of upper gastrointestinal bleeding. Ann Clin Gastroenterol Hepatol. 2019; 3: 006-011. https://dx.doi.org/10.29328/journal.acgh.1001008 Introduction Acute nonvariceal upper gastrointestinal (GI) bleeding remains a challenging presentation due to signi icant morbidity and mortality rates, and about half of all cases of upper GI bleeding are caused by gastric and duodenal ulcers. Although irstline endoscopy achieves bleeding control in most patients, if this does not work, the mortality rate can be 5% to 10% because of multiple comorbidi ties, advanced age, and high transfusion requirements. However, hospitalization and mortality due to severe upper gastrointestinal bleeding as a result of peptic ulcer are still high among the elderly [1-4]. Surgery is also associated with high mortality, and therefore, selective transcatheter arterial embolization (TAE) is considered a safer alternative due to the avoid ance of laparotomy, particularly in high-risk patients. In fact, in many institutions, TAE is now the irst-line intervention for massive arterial bleeding from the upper GI tract that is resistant to endoscopic therapy. Transcatheter Arterial Embolization for the treatment of upper gastrointestinal bleeding Published: June 07, 2019 007 Arterial embolization in the upper GI tract above the ligament of Treitz is generally considered to be very safe because of the rich collateral supply to the stomach and duodenum. We presents 15 cases of upper GIT bleeding treated successfully by arterial Embolization after failed endoscopy procedure. Methods From January 2015 to March 2019, 15 patients were referred to cardiac catheterization department with upper gastrointestinal bleeding. The typical candidate patient presents with the following: 1) massive bleeding (transfusion requirement of at least 3 U blood over 24 hours) or hemodynamic compromise (systolic blood pressure < 90 mm Hg and heart rate > 100 beats per minute or clinical shock), 2) endoscopy-refractory acute UGI bleeding, 3) recurrent bleeding after surgery. There are no absolute contraindications because angiography and embolization may be needed as lifesaving procedures. One patient was transferred from pediatric surgery and diagnosis was traumatic liver injury due to AV istula, 3 case transferred from general surgery and diagnosis was large liver hemangioma and liver cancer and 11 patients were transferred from internal medical department from Al Shifa hospital due to gastroduodenal ulcers, pancreatic cancer and liver pseudoaneurysm. The following variables were recorded: demographic data, CT or endoscopic diagnoses, comorbidities, lowest hemoglobin levels, total transfusion requirements, postprocedure complications, and mortality rates. Result The median age was, 62 years (age range, 14–82 years). Female was 3 patients (20%), The median time that passed from the clinical symptoms of bleeding to embolization was 4.2 days, 6 patients underwent multidetector computed tomography angiography (MDCTA) and 9 patient underwent endoscopy, For 1 patient, TAE was performed after failed endoscopic and surgical treatment due to duodenal ulcer, 6 patient underwent TAE because of high risk of surgery (2 liver cancer, 1 liver hemangioma, 1 pancreatic cancer, 1 right hepatic artery pseudoaneurysm after previous cholecystectomy, and 1 liver traumatic Arteriovenous istula), and 8 patients TAE was performed after failed endoscopic intervention. Baseline patient characteristics and the amount of packed red blood cells and freshly frozen plasma administered to the patients before TAE are presented in table 1. The most common of causes of bleeding are presented in table 2. The most common causes of bleeding were bleeding from gastroduodenal ulcers (9 cases, 60 %), followed by bleeding from liver cancer of hemangioma (3 cases, 20%) bleeding from pancreatic cancers (1 case, 6.7%), right hepatic artery pseudoaneurysm (1 case, 6.7%) and Liver traumatic AV istula (1 case, 6.7%) . The technical success rate of the embolization procedure, which was de ined as complete angiographic occlusion of the targeted vessels, was 100%. Out of the 15 cases, 12 (80%) were therapeutic embolizations, when the source of the bleeding was visualized during angiography, and 3 (20%) were prophylactic embolizations of the anatomical site. The sites of embolization are presented in table 3. Transcatheter Arterial Embolization for the treatment of upper gastrointestinal bleeding Published: June 07, 2019 008 No complications were reported after the procedure. Two (13%) patients had an episode of rebleeding within 30 days after the embolization procedure, one patients after TAE were treated surgically, and another patient was treated by re-embolization. Three (20.0%) of the patients died. (One patient liver cancer, one patient pancreatic cancer and last patient right hepatic artery pseudoaneurysm) Examples of the procedure are shown: Case 1 A 72-year-old female patient with upper GI bleeding, she had history of pancreas CA, she transferred to Al-Najah Hospital because Wipple operation. But the operation was failed. After failed operation massive PE and Melina was developed Endoscopy was done and suggested that bleeding from 2nd segment of duodenum. The Preoperative.: HgB: 6.8 g/dl despite 28 unit of blood and plasma transfusion. Urgent selective angiography was done and suggested cutoff of superior pancreatic duodenal artery and coil Embolization was done the patient was discharged after 2 days with good condition and HgB level was 10.5 g/dl. After 3 weeks repeat GIT bleeding was developed and HgB level was 8.3 g/dl, repeat Urgent selective angiography was done Embolization of gastro duodenal artery by Polyvinyl alcohol particle and coil Embolization was done the patient was discharged after 3 days with good condition and HgB level was 9.7 g/dl (Figure 1). Case 2 A 40-year-old female patient with thalasemia major and right hepatic mass presents with massive peritoneal bleeding from liver. The Pre-operative HgB:5.7 gram/dl, INR:2.84 despite 4 unit blood and 3 unit FFP transfusion. Left hepatic artery from celiac trunk and Right hepatic artery origin from proximal SMA. Urgent selective angiography was done and suggested Bleeding from RHA branches a srounding the mass in the right loupe of the liver. Absorbable gelatin sponge infusion and 3 Coil embolization was done (Figure 2). Table 1: Patients baseline characteristics. Parameter Variable Male, n (%) 12 (80) Female, n (%) 3 (20) Age: years (range) 62 (14-79) Time from bleeding start to TAE: days(range) 4.2 (2:7) Units of packed red cells before TAE: packed (range) 12.8 (4-22) Units of packed plasma before TAE: packed (range) 3.2 (2-5) Table 2: Causes of GIT bleeding. Causes No Percentage Gastroduodenal ulcers 9 60% Liver cancer 2 13% Liver hemangioma 1 6.7% Liver traumatic AV fi stula 1 6.7% Pseudoaneurysm 1 6.7% Pancreatic cancer 1 6.7% Total 15 100% Table 3: Site of Embolization. Embolized artery No. Percent Gastroduodenal artery 7 47% Hepatic artery 4 27% Left gastric artery 3 20% Gastroduodenal artery and right gastroepiploic artery 1 6.00% Total 15 100% Transcatheter Arterial Embolization for the treatment of upper gastrointestinal bleeding Published: June 07, 2019 009 Case 3 Female patient 79 years old with CHF and chronic AF and with history of Cholesystoectomy before 7 years, Presentation with recurrent Upper GIT Bleeding. The Pre-operative HgB:6.7 gram/dl, despite 6unit blood and 3 unit FFP transfusion Urgent selective angio","PeriodicalId":252959,"journal":{"name":"Annals of Clinical Gastroenterology and Hepatology","volume":"38 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2019-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Annals of Clinical Gastroenterology and Hepatology","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.29328/JOURNAL.ACGH.1001008","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0

Abstract

Background: Transcatheter arterial embolization can be used for patients with recurrent bleeding from the upper gastrointestinal tract after failed endoscopic treatment. Our aim to identify the clinical and technical factors that infl uenced the outcome of transcatheter embolization for therapy of upper gastrointestinal bleeding after failed surgery or after failed endoscopic treatment in high risk surgical patients. Methods: We performed a prospective study to analysis of the 15 patients who underwent Transcatheter arterial embolization for nonvariceal upper gastrointestinal bleeding at Alshifa hospital from January 2015 to March 2019. The following variables were recorded: demographic data, time from bleeding start to TAE, units of packed red cells before TAE and units of packed plasma before Transcatheter arterial embolization and we analysis 30 days rebleeding rates and mortality. Results: Patients treated with Transcatheter arterial embolization (median age: 62 years, range: 14–79 years).The technical success rate of the embolization procedure was 100%. Time from bleeding start to TAE was 2.1 (1-4) days , units of packed red cells before Transcatheter arterial embolization was 12.8 (4-22) packed and units of packed plasma was 3.2 (2-5) packed. Following 30 days after embolization, 2 (13%) patients had repeated bleeding and 3 (20.0%) patients died. Conclusion: In our experience, arterial embolization is a safe and effective treatment method for upper gastrointestinal bleeding and a possible alternative to surgery for high-risk patients. Research Article Transcatheter Arterial Embolization for the treatment of upper gastrointestinal bleeding Mohammed Habib1* and Majed Alshounat2 1Consultant, Interventional Cardiologist, Head of Cardiology Department, Alshifa Hospital, Gaza, Palestine 2Consultant, interventional Cardiologist. Alshifa Hospital, Gaza, Palestine *Address for Correspondence: Mohammed Habib, MD, PhD, Alshifa Hospital, Cardiology Department, Gaza, Palestine, Tel: 00972599514060; Email: cardiomohammad@yahoo.com Submitted: 22 May 2019 Approved: 06 June 2019 Published: 07 June 2019 Copyright: © 2019 Habib M, et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited How to cite this article: Habib M, Alshounat M. Transcatheter Arterial Embolization for the treatment of upper gastrointestinal bleeding. Ann Clin Gastroenterol Hepatol. 2019; 3: 006-011. https://dx.doi.org/10.29328/journal.acgh.1001008 Introduction Acute nonvariceal upper gastrointestinal (GI) bleeding remains a challenging presentation due to signi icant morbidity and mortality rates, and about half of all cases of upper GI bleeding are caused by gastric and duodenal ulcers. Although irstline endoscopy achieves bleeding control in most patients, if this does not work, the mortality rate can be 5% to 10% because of multiple comorbidi ties, advanced age, and high transfusion requirements. However, hospitalization and mortality due to severe upper gastrointestinal bleeding as a result of peptic ulcer are still high among the elderly [1-4]. Surgery is also associated with high mortality, and therefore, selective transcatheter arterial embolization (TAE) is considered a safer alternative due to the avoid ance of laparotomy, particularly in high-risk patients. In fact, in many institutions, TAE is now the irst-line intervention for massive arterial bleeding from the upper GI tract that is resistant to endoscopic therapy. Transcatheter Arterial Embolization for the treatment of upper gastrointestinal bleeding Published: June 07, 2019 007 Arterial embolization in the upper GI tract above the ligament of Treitz is generally considered to be very safe because of the rich collateral supply to the stomach and duodenum. We presents 15 cases of upper GIT bleeding treated successfully by arterial Embolization after failed endoscopy procedure. Methods From January 2015 to March 2019, 15 patients were referred to cardiac catheterization department with upper gastrointestinal bleeding. The typical candidate patient presents with the following: 1) massive bleeding (transfusion requirement of at least 3 U blood over 24 hours) or hemodynamic compromise (systolic blood pressure < 90 mm Hg and heart rate > 100 beats per minute or clinical shock), 2) endoscopy-refractory acute UGI bleeding, 3) recurrent bleeding after surgery. There are no absolute contraindications because angiography and embolization may be needed as lifesaving procedures. One patient was transferred from pediatric surgery and diagnosis was traumatic liver injury due to AV istula, 3 case transferred from general surgery and diagnosis was large liver hemangioma and liver cancer and 11 patients were transferred from internal medical department from Al Shifa hospital due to gastroduodenal ulcers, pancreatic cancer and liver pseudoaneurysm. The following variables were recorded: demographic data, CT or endoscopic diagnoses, comorbidities, lowest hemoglobin levels, total transfusion requirements, postprocedure complications, and mortality rates. Result The median age was, 62 years (age range, 14–82 years). Female was 3 patients (20%), The median time that passed from the clinical symptoms of bleeding to embolization was 4.2 days, 6 patients underwent multidetector computed tomography angiography (MDCTA) and 9 patient underwent endoscopy, For 1 patient, TAE was performed after failed endoscopic and surgical treatment due to duodenal ulcer, 6 patient underwent TAE because of high risk of surgery (2 liver cancer, 1 liver hemangioma, 1 pancreatic cancer, 1 right hepatic artery pseudoaneurysm after previous cholecystectomy, and 1 liver traumatic Arteriovenous istula), and 8 patients TAE was performed after failed endoscopic intervention. Baseline patient characteristics and the amount of packed red blood cells and freshly frozen plasma administered to the patients before TAE are presented in table 1. The most common of causes of bleeding are presented in table 2. The most common causes of bleeding were bleeding from gastroduodenal ulcers (9 cases, 60 %), followed by bleeding from liver cancer of hemangioma (3 cases, 20%) bleeding from pancreatic cancers (1 case, 6.7%), right hepatic artery pseudoaneurysm (1 case, 6.7%) and Liver traumatic AV istula (1 case, 6.7%) . The technical success rate of the embolization procedure, which was de ined as complete angiographic occlusion of the targeted vessels, was 100%. Out of the 15 cases, 12 (80%) were therapeutic embolizations, when the source of the bleeding was visualized during angiography, and 3 (20%) were prophylactic embolizations of the anatomical site. The sites of embolization are presented in table 3. Transcatheter Arterial Embolization for the treatment of upper gastrointestinal bleeding Published: June 07, 2019 008 No complications were reported after the procedure. Two (13%) patients had an episode of rebleeding within 30 days after the embolization procedure, one patients after TAE were treated surgically, and another patient was treated by re-embolization. Three (20.0%) of the patients died. (One patient liver cancer, one patient pancreatic cancer and last patient right hepatic artery pseudoaneurysm) Examples of the procedure are shown: Case 1 A 72-year-old female patient with upper GI bleeding, she had history of pancreas CA, she transferred to Al-Najah Hospital because Wipple operation. But the operation was failed. After failed operation massive PE and Melina was developed Endoscopy was done and suggested that bleeding from 2nd segment of duodenum. The Preoperative.: HgB: 6.8 g/dl despite 28 unit of blood and plasma transfusion. Urgent selective angiography was done and suggested cutoff of superior pancreatic duodenal artery and coil Embolization was done the patient was discharged after 2 days with good condition and HgB level was 10.5 g/dl. After 3 weeks repeat GIT bleeding was developed and HgB level was 8.3 g/dl, repeat Urgent selective angiography was done Embolization of gastro duodenal artery by Polyvinyl alcohol particle and coil Embolization was done the patient was discharged after 3 days with good condition and HgB level was 9.7 g/dl (Figure 1). Case 2 A 40-year-old female patient with thalasemia major and right hepatic mass presents with massive peritoneal bleeding from liver. The Pre-operative HgB:5.7 gram/dl, INR:2.84 despite 4 unit blood and 3 unit FFP transfusion. Left hepatic artery from celiac trunk and Right hepatic artery origin from proximal SMA. Urgent selective angiography was done and suggested Bleeding from RHA branches a srounding the mass in the right loupe of the liver. Absorbable gelatin sponge infusion and 3 Coil embolization was done (Figure 2). Table 1: Patients baseline characteristics. Parameter Variable Male, n (%) 12 (80) Female, n (%) 3 (20) Age: years (range) 62 (14-79) Time from bleeding start to TAE: days(range) 4.2 (2:7) Units of packed red cells before TAE: packed (range) 12.8 (4-22) Units of packed plasma before TAE: packed (range) 3.2 (2-5) Table 2: Causes of GIT bleeding. Causes No Percentage Gastroduodenal ulcers 9 60% Liver cancer 2 13% Liver hemangioma 1 6.7% Liver traumatic AV fi stula 1 6.7% Pseudoaneurysm 1 6.7% Pancreatic cancer 1 6.7% Total 15 100% Table 3: Site of Embolization. Embolized artery No. Percent Gastroduodenal artery 7 47% Hepatic artery 4 27% Left gastric artery 3 20% Gastroduodenal artery and right gastroepiploic artery 1 6.00% Total 15 100% Transcatheter Arterial Embolization for the treatment of upper gastrointestinal bleeding Published: June 07, 2019 009 Case 3 Female patient 79 years old with CHF and chronic AF and with history of Cholesystoectomy before 7 years, Presentation with recurrent Upper GIT Bleeding. The Pre-operative HgB:6.7 gram/dl, despite 6unit blood and 3 unit FFP transfusion Urgent selective angio
查看原文
分享 分享
微信好友 朋友圈 QQ好友 复制链接
本刊更多论文
经导管动脉栓塞治疗上消化道出血
背景:经导管动脉栓塞可用于内镜治疗失败后复发的上消化道出血患者。我们的目的是确定影响经导管栓塞治疗手术失败或内镜治疗失败后高危手术患者上消化道出血结果的临床和技术因素。方法:我们对2015年1月至2019年3月在Alshifa医院接受经导管动脉栓塞治疗非静脉曲张上消化道出血的15例患者进行了前瞻性研究。记录以下变量:人口统计学数据,从出血开始到TAE的时间,TAE前的红细胞堆积单位和经导管动脉栓塞前的血浆堆积单位,并分析30天再出血率和死亡率。结果:经导管动脉栓塞治疗的患者(中位年龄:62岁,范围:14-79岁)。栓塞术的技术成功率为100%。从出血开始到TAE的时间为2.1(1-4)天,经导管动脉栓塞前红细胞填充单位为12.8(4-22)个,血浆填充单位为3.2(2-5)个。栓塞后30 d, 2例(13%)患者再次出血,3例(20.0%)患者死亡。结论:根据我们的经验,动脉栓塞是一种安全有效的治疗上消化道出血的方法,是治疗高危患者的一种可能的替代方法。研究文章经导管动脉栓塞治疗上消化道出血Mohammed Habib1* and Majed Alshounat2顾问医师,介入心脏病专家,巴勒斯坦加沙Alshifa医院心脏病科主任顾问医师,介入心脏病专家*通讯地址:穆罕默德·哈比卜,医学博士,巴勒斯坦加沙,阿希法医院心脏病科,电话:00972599514060;邮箱:cardiomohammad@yahoo.com提交时间:2019年5月22日批准时间:2019年6月06日发布时间:2019年6月07日版权所有:©2019 Habib M, et al.。这是一篇在知识共享署名许可下发布的开放获取文章,该许可允许在任何媒介上不受限制地使用、分发和复制,前提是正确引用原始作品。Ann clinical Gastroenterol Hepatol; 2019;3: 006 - 011。https://dx.doi.org/10.29328/journal.acgh.1001008简介急性非静脉曲张性上消化道(GI)出血仍然是一个具有挑战性的表现,由于显著的发病率和死亡率,大约一半的上消化道出血病例是由胃和十二指肠溃疡引起的。尽管一线内窥镜检查在大多数患者中实现了出血控制,但如果这不起作用,由于多种合并症、高龄和高输血需求,死亡率可达5%至10%。然而,老年人因消化性溃疡导致的严重上消化道出血的住院率和死亡率仍然很高[1-4]。手术也与高死亡率相关,因此,选择性经导管动脉栓塞(TAE)被认为是一种更安全的选择,因为可以避免剖腹手术,特别是在高危患者中。事实上,在许多机构中,TAE现在是对内镜治疗无效的上消化道大量动脉出血的一线干预措施。经导管动脉栓塞治疗上消化道出血由于胃和十二指肠有丰富的侧支供应,通常认为在Treitz韧带上方的上消化道动脉栓塞是非常安全的。我们报告了15例内镜手术失败后经动脉栓塞成功治疗上消化道出血的病例。方法2015年1月至2019年3月,我院收治15例上消化道出血患者。典型的候选患者表现为:1)大出血(24小时内至少输血3u)或血流动力学损害(收缩压< 90 mm Hg,心率> 100次/分钟或临床休克),2)内镜下难治性急性UGI出血,3)术后复发性出血。没有绝对的禁忌症,因为血管造影和栓塞可能需要作为挽救生命的程序。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 去求助
来源期刊
自引率
0.00%
发文量
0
期刊最新文献
Case Series of Metastatic Cutaneous Malignant Melanoma to the Gallbladder and the First Reported Case of Metachronous Adenocarcinoma of the Colon Prospective Coronavirus Liver Effects: Available Knowledge Jejunal adenocarcinoma, a rare cancer of the gastrointestinal tract: a comprehensive review discussion epidemiology A case of coexistent acute severe alcoholic and Q fever hepatitis: The useful contribution of repeated liver biopsies Correlation of dyslipidemia and athrogenic index of plasma with anthropometric measurements and clinical variables among diabetic patients in Dessie Comprehensive Specialized Hospital, Ethiopia, 2021
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
已复制链接
已复制链接
快去分享给好友吧!
我知道了
×
扫码分享
扫码分享
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1