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Masunaga T, Kato M, Sasaki M, Iwata K, Miyazaki K, Kubosawa Y, Mizutani M, Takatori Y, Matsuura N, Nakayama A, Takabayashi K, Yahagi N. Novel quantitative assessment indicators for efficiency and precision of endoscopic submucosal dissection in animal training models by analyzing an electrical surgical unit. Dig Endosc 2024; 36:19-27. [PMID: 37405690 DOI: 10.1111/den.14632] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Accepted: 07/02/2023] [Indexed: 07/06/2023]
Abstract
OBJECTIVES Although endoscopic submucosal dissection (ESD) training is important, quantitative assessments have not been established. This study aimed to explore a novel quantitative assessment system by analyzing an electrical surgical unit (ESU). METHODS This was an ex vivo study. Step one: to identify the novel efficiency indicators, 20 endoscopists performed one ESD each, and we analyzed correlations between their resection speed and electrical status. Step two: to identify the novel precision indicators, three experts and three novices performed one ESD each, and we compared the stability of the electrical status. Step three: three novices in step two performed 19 additional ESDs, and we analyzed the learning curve using novel indicators. RESULTS Step one: the percentage of total activation time (AT) of ESU in the procedure time (β coefficient, 0.80; P < 0.01) and AT required for submucosal dissection (β coefficient, -0.57; P < 0.01) were significantly correlated with the resection speed. Step two: coefficient of variation of the AT per one pulse (0.16 [range, 0.13-0.17] vs. 0.26 [range, 0.20-0.41], P = 0.049) and coefficient of variation of the peak electric power per pulse during mucosal incision (0.14 [range, 0.080-0.15] vs. 0.25 [range, 0.24-0.28], P = 0.049) were significantly lower in the experts than in the novices. Regarding the learning curve, the percentage of total AT of ESU in the procedure time and AT required for submucosal dissection had a trend of improvement. CONCLUSION Novel indicators identified by analyzing ESU enable quantitative assessment for endoscopist's skill.
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Affiliation(s)
- Teppei Masunaga
- Division of Research and Development for Minimally Invasive Treatment, Cancer Center, Keio University School of Medicine, Tokyo, Japan
| | - Motohiko Kato
- Division of Research and Development for Minimally Invasive Treatment, Cancer Center, Keio University School of Medicine, Tokyo, Japan
| | - Motoki Sasaki
- Division of Research and Development for Minimally Invasive Treatment, Cancer Center, Keio University School of Medicine, Tokyo, Japan
| | - Kentaro Iwata
- Division of Research and Development for Minimally Invasive Treatment, Cancer Center, Keio University School of Medicine, Tokyo, Japan
| | - Kurato Miyazaki
- Division of Research and Development for Minimally Invasive Treatment, Cancer Center, Keio University School of Medicine, Tokyo, Japan
| | - Yoko Kubosawa
- Division of Research and Development for Minimally Invasive Treatment, Cancer Center, Keio University School of Medicine, Tokyo, Japan
| | - Mari Mizutani
- Division of Research and Development for Minimally Invasive Treatment, Cancer Center, Keio University School of Medicine, Tokyo, Japan
| | - Yusaku Takatori
- Division of Research and Development for Minimally Invasive Treatment, Cancer Center, Keio University School of Medicine, Tokyo, Japan
| | - Noriko Matsuura
- Division of Research and Development for Minimally Invasive Treatment, Cancer Center, Keio University School of Medicine, Tokyo, Japan
| | - Atsushi Nakayama
- Division of Research and Development for Minimally Invasive Treatment, Cancer Center, Keio University School of Medicine, Tokyo, Japan
| | - Kaoru Takabayashi
- Center for Diagnostic and Therapeutic Endoscopy, Keio University School of Medicine, Tokyo, Japan
| | - Naohisa Yahagi
- Division of Research and Development for Minimally Invasive Treatment, Cancer Center, Keio University School of Medicine, Tokyo, Japan
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He XJ, Wang XL, Jiang CS, Hong DG, Lin HL, Zheng YP, Li H, Chen XJ, Huang JX, Dai LS, Liu MY, Luo BX, Li DL, Li DZ, Wang W. Novel beagle model of gastric local fibrotic target lesions for the evaluation and training of endoscopic techniques. BMC Gastroenterol 2023; 23:412. [PMID: 38012582 PMCID: PMC10683295 DOI: 10.1186/s12876-023-03055-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/25/2022] [Accepted: 11/18/2023] [Indexed: 11/29/2023] Open
Abstract
BACKGROUND Novel endoscopic techniques used in the treatment of gastric lesions with local submucosal fibrosis need preclinical evaluation and training due to safety limitations. Therefore, the purpose of our study was to establish an animal model of gastric local fibrotic target lesions and assess its feasibility in the evaluation and training of endoscopic techniques. METHODS In six experimental beagles, a 50% glucose solution was injected into three submucosal areas of the fundus, body, and antrum of the stomach to create gastric local fibrotic target lesions (experimental group). On post-injection day (PID) 7, the injection sites were assessed endoscopically to confirm the presence of submucosal fibrosis formation, and the dental floss clip traction assisted endoscopic submucosal dissection (DFC-ESD) procedure was performed on the gastric local fibrotic target lesions to confirm its feasibility after endoscopic observation. The normal gastric mucosa of six control beagles underwent the same procedure (control group). All the resected specimens were evaluated by histological examination. RESULTS All 12 beagles survived without postoperative adverse events. On PID 7, 16 ulcer changes were observed at the injection sites (16/18) under the endoscope, and endoscopic ultrasonography confirmed the local submucosal fibrosis formation in all ulcer lesions. The subsequent DFC-ESD was successfully performed on the 32 gastric target lesions, and the mean submucosal dissection time in the ulcer lesions was greater than that in the normal gastric mucosa (15.3 ± 5.6 vs. 6.8 ± 0.8 min; P < 0.001). There was no difference in rates of en bloc resection, severe hemorrhage, or perforation between the two groups. Histological analysis of the ulcer lesions showed the absence of epithelial or muscularis mucosae and extensive submucosal fibrous tissue proliferations compared with normal gastric mucosa. Overall, endoscopists had high satisfaction with the realism and feasibility of the animal model. CONCLUSION We developed a novel animal model of gastric local fibrotic target lesions to simulate difficult clinical situations, which strongly appeared to be suitable for the preclinical evaluation and learning of advanced endoscopic techniques.
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Affiliation(s)
- Xiao-Jian He
- Fuzong Clinical Medical College, Fujian Medical University, Fuzhou, China
- Department of Digestive Diseases, 900TH Hospital of Joint Logistics Support Force, 156 North Road of West No.2 Ring, Fuzhou, 350025, China
| | - Xiao-Ling Wang
- Fuzong Clinical Medical College, Fujian Medical University, Fuzhou, China
- Department of Digestive Diseases, 900TH Hospital of Joint Logistics Support Force, 156 North Road of West No.2 Ring, Fuzhou, 350025, China
| | - Chuan-Shen Jiang
- Fuzong Clinical Medical College, Fujian Medical University, Fuzhou, China
- Department of Digestive Diseases, 900TH Hospital of Joint Logistics Support Force, 156 North Road of West No.2 Ring, Fuzhou, 350025, China
| | - Dong-Gui Hong
- Fuzong Clinical Medical College, Fujian Medical University, Fuzhou, China
- Department of Digestive Diseases, 900TH Hospital of Joint Logistics Support Force, 156 North Road of West No.2 Ring, Fuzhou, 350025, China
| | - Hai-Lan Lin
- Fuzong Clinical Medical College, Fujian Medical University, Fuzhou, China
- Department of Digestive Diseases, 900TH Hospital of Joint Logistics Support Force, 156 North Road of West No.2 Ring, Fuzhou, 350025, China
| | - Yun-Ping Zheng
- Fuzong Clinical Medical College, Fujian Medical University, Fuzhou, China
- Department of Digestive Diseases, 900TH Hospital of Joint Logistics Support Force, 156 North Road of West No.2 Ring, Fuzhou, 350025, China
| | - Han Li
- Fuzong Clinical Medical College, Fujian Medical University, Fuzhou, China
- Department of Digestive Diseases, 900TH Hospital of Joint Logistics Support Force, 156 North Road of West No.2 Ring, Fuzhou, 350025, China
| | - Xin-Jiang Chen
- Fuzong Clinical Medical College, Fujian Medical University, Fuzhou, China
- Department of Digestive Diseases, 900TH Hospital of Joint Logistics Support Force, 156 North Road of West No.2 Ring, Fuzhou, 350025, China
| | - Jian-Xiao Huang
- Fuzong Clinical Medical College, Fujian Medical University, Fuzhou, China
- Department of Digestive Diseases, 900TH Hospital of Joint Logistics Support Force, 156 North Road of West No.2 Ring, Fuzhou, 350025, China
| | - Ling-Shuang Dai
- Fuzong Clinical Medical College, Fujian Medical University, Fuzhou, China
- Department of Digestive Diseases, 900TH Hospital of Joint Logistics Support Force, 156 North Road of West No.2 Ring, Fuzhou, 350025, China
| | - Mei-Yan Liu
- Fuzong Clinical Medical College, Fujian Medical University, Fuzhou, China
- Department of Digestive Diseases, 900TH Hospital of Joint Logistics Support Force, 156 North Road of West No.2 Ring, Fuzhou, 350025, China
| | - Bao-Xiang Luo
- Fuzong Clinical Medical College, Fujian Medical University, Fuzhou, China
- Department of Digestive Diseases, 900TH Hospital of Joint Logistics Support Force, 156 North Road of West No.2 Ring, Fuzhou, 350025, China
| | - Dong-Liang Li
- Fuzong Clinical Medical College, Fujian Medical University, Fuzhou, China.
- Department of Hepatobiliary Disease, 900TH Hospital of Joint Logistics Support Force, 156 North Road of West No.2 Ring, Fuzhou, 350025, China.
| | - Da-Zhou Li
- Fuzong Clinical Medical College, Fujian Medical University, Fuzhou, China.
- Department of Digestive Diseases, 900TH Hospital of Joint Logistics Support Force, 156 North Road of West No.2 Ring, Fuzhou, 350025, China.
| | - Wen Wang
- Fuzong Clinical Medical College, Fujian Medical University, Fuzhou, China.
- Department of Digestive Diseases, 900TH Hospital of Joint Logistics Support Force, 156 North Road of West No.2 Ring, Fuzhou, 350025, China.
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Emara MH, Zaghloul M, Ramadan HKA, Mohamed SY, Tag-Adeen M, Alzamzamy A, Alboraie M, Madkour A, Altonbary AY, Zaher TI, Elhassan AA, Abdeen N, Ahmed MH. Endoscopic resection of superficial bowel neoplasia: The unmet needs in the Egyptian practice. World J Gastrointest Endosc 2022; 14:235-249. [PMID: 35634486 PMCID: PMC9048489 DOI: 10.4253/wjge.v14.i4.235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Revised: 12/22/2021] [Accepted: 03/27/2022] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Management of superficial bowel neoplasia (SBN) in early stages is associated with better outcomes. The last few decades experienced a paradigm shift in the management of SBN with the introduction of advanced endoscopic resection techniques (ERTs). However, there are no clear data about the aspects of ERTs in Egypt despite the growing gastroenterology practice.
AIM To investigate the knowledge, attitude, and practice of ERTs toward management of SBN among Egyptian practitioners and the suitability of the endoscopy units’ infrastructures toward these techniques.
METHODS An online 2-pages questionnaire was used. The first page comprised demographic data, and questions for all physicians, about the knowledge (11 questions) of and attitude (5 questions) toward ERTs as a therapeutic option for SBN. The second page investigated the practice of ERTs by endoscopists (6 questions) and the infrastructures of their endoscopy units (14 questions). The survey was disseminated through July 2021 and the data were collected in an excel sheet and later analyzed anonymously.
RESULTS The complete responses were 833/2300 (36.2%). The majority of the participants were males (n = 560, 67.2%), middle-aged (n = 366, 43.9%), consultants (n = 464, 55.7%), gastroenterologists (n = 678, 81.4%), spending ≥ 15 years in practice (n = 368, 44.2%), and were working in university hospitals (n = 569, 68.3%). The majority correctly identified the definition of SBN (88.4%) and the terms polypectomy, endoscopic mucosal resection (EMR), and endoscopic submucosal dissection (ESD) (92.1%, 90.2%, and 89.1% respectively). However, 26.9%, 43.2% and 49.5% did not recognize the clear indication of polypectomy, EMR, and ESD respectively. Although 68.1% of physicians are convinced about the ERTs for management of SBN; only 8.9% referred all candidate cases for ERTs. About 76.5% of endoscopists had formal training in the basic polypectomy techniques while formal training for EMR and ESD was encountered only in 31.9% and 7.2% respectively. About 71.6% and 88.4% of endoscopists did not perform EMR or ESD in the last one year. Consequently, the complication rate reported by endoscopists was limited to 18.1% (n = 103) of endoscopists. Only 25.8% of endoscopists feel confident in the management of ERTs-related complications and a half (49.9%) were not sure about their competency. Regarding the endoscopy units’ infrastructures, only 4.2% of the centers had their endoscopes 100% armed with optical enhancements and 54.4% considered their institutions ready for managing ERTs-related complications. Only 18.3% (n = 104) of endoscopists treated their complicated cases surgically because the most frequent ERTs-related complications were procedural bleeding (26.7%), and perforations (17%).
CONCLUSION A significant deficiency was reported in the knowledge and attitude of Egyptian practitioners caring for patients with SBN toward ERTs. The lack of trained endoscopists in both EMR and ESD in part is due to unsuitable infrastructures of many endoscopy units.
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Affiliation(s)
- Mohamed H Emara
- Department of Hepatology, Gastroenterology and Infectious Diseases, Kafrelsheikh University, Kafr Elshiekh 33516, Egypt
| | - Mariam Zaghloul
- Department of Hepatology, Gastroenterology and Infectious Diseases, Kafrelsheikh University, Kafr Elshiekh 33516, Egypt
| | | | - Salem Youssef Mohamed
- Department of Internal Medicine, Faculty of Medicine, Gastroenterology and Hepatology Unit, Zagazig University, Zagazig 44519, Egypt
| | - Mohammed Tag-Adeen
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, South Valley University, Qena Faculty of Medicine, Qena 83523, Egypt
| | - Ahmed Alzamzamy
- Department of Gastroenterology and Hepatology, Maadi Armed Forces Medical Complex, Military Medical Academy, Cairo 11841, Egypt
| | - Mohamed Alboraie
- Department of Internal Medicine, Al-Azhar University, Cairo11884, Egypt
| | - Ahmad Madkour
- Department of Endemic Medicine, Helwan University, Cairo 11795, Egypt
| | | | - Tarik I Zaher
- Department of Tropical Medicine, Zagazig University, Zagazig 44519, Egypt
| | - Ahmed Abo Elhassan
- Department of Tropical Medicine, Suez Canal University, Ismailia 41522, Egypt
| | - Nermeen Abdeen
- Department of Tropical Medicine, Alexandria University, Alexandria 21526, Egypt
| | - Mohammed Hussien Ahmed
- Department of Hepatology, Gastroenterology and Infectious Diseases, Kafrelsheikh University, Kafr Elshiekh 33516, Egypt
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Emara MH, Zaghloul M, Ramadan HKA, Mohamed SY, Tag-Adeen M, Alzamzamy A, Alboraie M, Madkour A, Altonbary AY, Zaher TI, Elhassan AA, Abdeen N, Ahmed MH. Endoscopic resection of superficial bowel neoplasia: The unmet needs in the Egyptian practice. World J Gastrointest Endosc 2022; 14:236-250. [DOI: 10.4253/wjge.v14.i4.236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Management of superficial bowel neoplasia (SBN) in early stages is associated with better outcomes. The last few decades experienced a paradigm shift in the management of SBN with the introduction of advanced endoscopic resection techniques (ERTs). However, there are no clear data about the aspects of ERTs in Egypt despite the growing gastroenterology practice.
AIM To investigate the knowledge, attitude, and practice of ERTs toward management of SBN among Egyptian practitioners and the suitability of the endoscopy units’ infrastructures toward these techniques.
METHODS An online 2-pages questionnaire was used. The first page comprised demographic data, and questions for all physicians, about the knowledge (11 questions) of and attitude (5 questions) toward ERTs as a therapeutic option for SBN. The second page investigated the practice of ERTs by endoscopists (6 questions) and the infrastructures of their endoscopy units (14 questions). The survey was disseminated through July 2021 and the data were collected in an excel sheet and later analyzed anonymously.
RESULTS The complete responses were 833/2300 (36.2%). The majority of the participants were males (n = 560, 67.2%), middle-aged (n = 366, 43.9%), consultants (n = 464, 55.7%), gastroenterologists (n = 678, 81.4%), spending ≥ 15 years in practice (n = 368, 44.2%), and were working in university hospitals (n = 569, 68.3%). The majority correctly identified the definition of SBN (88.4%) and the terms polypectomy, endoscopic mucosal resection (EMR), and endoscopic submucosal dissection (ESD) (92.1%, 90.2%, and 89.1% respectively). However, 26.9%, 43.2% and 49.5% did not recognize the clear indication of polypectomy, EMR, and ESD respectively. Although 68.1% of physicians are convinced about the ERTs for management of SBN; only 8.9% referred all candidate cases for ERTs. About 76.5% of endoscopists had formal training in the basic polypectomy techniques while formal training for EMR and ESD was encountered only in 31.9% and 7.2% respectively. About 71.6% and 88.4% of endoscopists did not perform EMR or ESD in the last one year. Consequently, the complication rate reported by endoscopists was limited to 18.1% (n = 103) of endoscopists. Only 25.8% of endoscopists feel confident in the management of ERTs-related complications and a half (49.9%) were not sure about their competency. Regarding the endoscopy units’ infrastructures, only 4.2% of the centers had their endoscopes 100% armed with optical enhancements and 54.4% considered their institutions ready for managing ERTs-related complications. Only 18.3% (n = 104) of endoscopists treated their complicated cases surgically because the most frequent ERTs-related complications were procedural bleeding (26.7%), and perforations (17%).
CONCLUSION A significant deficiency was reported in the knowledge and attitude of Egyptian practitioners caring for patients with SBN toward ERTs. The lack of trained endoscopists in both EMR and ESD in part is due to unsuitable infrastructures of many endoscopy units.
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Affiliation(s)
- Mohamed H Emara
- Department of Hepatology, Gastroenterology and Infectious Diseases, Kafrelsheikh University, Kafr Elshiekh 33516, Egypt
| | - Mariam Zaghloul
- Department of Hepatology, Gastroenterology and Infectious Diseases, Kafrelsheikh University, Kafr Elshiekh 33516, Egypt
| | | | - Salem Youssef Mohamed
- Department of Internal Medicine, Faculty of Medicine, Gastroenterology and Hepatology Unit, Zagazig University, Zagazig 44519, Egypt
| | - Mohammed Tag-Adeen
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, South Valley University, Qena Faculty of Medicine, Qena 83523, Egypt
| | - Ahmed Alzamzamy
- Department of Gastroenterology and Hepatology, Maadi Armed Forces Medical Complex, Military Medical Academy, Cairo 11841, Egypt
| | - Mohamed Alboraie
- Department of Internal Medicine, Al-Azhar University, Cairo11884, Egypt
| | - Ahmad Madkour
- Department of Endemic Medicine, Helwan University, Cairo 11795, Egypt
| | | | - Tarik I Zaher
- Department of Tropical Medicine, Zagazig University, Zagazig 44519, Egypt
| | - Ahmed Abo Elhassan
- Department of Tropical Medicine, Suez Canal University, Ismailia 41522, Egypt
| | - Nermeen Abdeen
- Department of Tropical Medicine, Alexandria University, Alexandria 21526, Egypt
| | - Mohammed Hussien Ahmed
- Department of Hepatology, Gastroenterology and Infectious Diseases, Kafrelsheikh University, Kafr Elshiekh 33516, Egypt
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Pih GY, Lee JS, Ahn JY, Kim DH, Na HK, Lee JH, Jung KW, Choi KD, Song HJ, Lee GH, Jung HY. Is Ex Vivo Training before In Vivo Training Effective in Learning Gastric Endoscopic Submucosal Dissection? THE KOREAN JOURNAL OF HELICOBACTER AND UPPER GASTROINTESTINAL RESEARCH 2021. [DOI: 10.7704/kjhugr.2020.0064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Lee JG, Park CH, Chung H, Park JC, Kim DH, Lee BI, Byeon JS, Jung HY. Current status and trend in training for endoscopic submucosal dissection: A nationwide survey in Korea. PLoS One 2020; 15:e0232691. [PMID: 32384112 PMCID: PMC7209322 DOI: 10.1371/journal.pone.0232691] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Accepted: 04/19/2020] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Although endoscopic submucosal dissection (ESD) is widely used, the current status and trend in its training have yet to be fully evaluated. We aimed to investigate how ESD endoscopists have been trained in actual clinical practice. METHODS Endoscopists aged <45 years who have completed a gastroenterology fellowship or were currently in a fellowship for ≥2 years were included. We conducted a nationwide survey on the ESD training experiences of these endoscopists. RESULTS Among 79 young Korean endoscopists invited to participate in the survey, 68 (86.1%) trained in 24 major hospitals responded to the questionnaire. Twenty, 25, and 23 participants belonged to the second-year fellow, <5 years after training, and ≥5 years after training groups, respectively. Sixty-nine percent of the participants observed ≥50 ESD cases before starting ESD under supervision by an expert endoscopist. Additionally, 22% experienced ≥20 supervised ESDs during the training period. The proportion of the participants who underwent a hands-on course differed among the groups (≥5 years after training, 13.0%; <5 years after training, 40.0%; and second-year fellow, 50.0%; P = 0.027). ESD under supervision, observation, and hands-on course were the preferred methods for learning ESD (91.1%, 80.9%, and 35.3%, respectively). Overall, 42.6% of the participants were satisfied with their training program. More experience in supervised ESD (≥20 cases) was associated with an increased satisfaction (odds ratio, 6.65; 95% confidence interval, 1.62-36.31). CONCLUSIONS Observation and performance of ESD under the supervision of an expert endoscopist are the primary methods for learning ESD. Hands-on course program has been used more frequently in recent years.
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Affiliation(s)
- Jae Gon Lee
- Department of Internal Medicine, Hanyang University Guri Hospital, Hanyang University College of Medicine, Guri, Korea
| | - Chan Hyuk Park
- Department of Internal Medicine, Hanyang University Guri Hospital, Hanyang University College of Medicine, Guri, Korea
| | - Hyunsoo Chung
- Division of Gastroenterology, Department of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - Jun Chul Park
- Division of Gastroenterology, Department of Internal Medicine, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - Do Hoon Kim
- Department of Gastroenterology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea
| | - Bo-In Lee
- Division of Gastroenterology, Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Jeong-Sik Byeon
- Department of Gastroenterology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea
| | - Hwoon-Yong Jung
- Department of Gastroenterology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea
- * E-mail:
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Evaluation of Eleview® Bioadhesive Properties and Cushion-Forming Ability. Polymers (Basel) 2020; 12:polym12020346. [PMID: 32033452 PMCID: PMC7077458 DOI: 10.3390/polym12020346] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 01/22/2020] [Accepted: 01/28/2020] [Indexed: 01/06/2023] Open
Abstract
Submucosal injection is generally required for both endoscopic-mucosal resection (EMR) and submucosal dissection (ESD). SIC-8000 (Eleview®) is a new liquid composition in the form of a microemulsion for submucosal injection, approved by the Food and Drug Administration (FDA) 510(k) and Conformité Européene (CE) marked, containing a biocompatible polymer as a cushioning agent. The aim of this study was to evaluate Eleview®’s performance in terms of bioadhesive properties and cushion-forming ability. The bioadhesion was evaluated by measuring the interaction between Eleview® and the extracellular matrix (the main component of the submucosal layer) using the texture analyzer. To better comprehend the mechanism of action of Eleview® after submucosal injection, force of detachment and adhesion work were measured for the following formulations: Eleview®, Eleview® without poloxamer (functional polymer), poloxamer solution alone, normal saline, and MucoUp® (competing product on the Japanese market). The results obtained show the interaction between Eleview® and the extracellular matrix, highlighting the stronger bioadhesive properties of Eleview® compared with Eleview® without poloxamer, poloxamer solution alone, as well as normal saline and MucoUp®. The ability of Eleview® to form a consistent and long-lasting cushion in situ, once injected into the submucosal layer, was tested ex vivo on a porcine stomach. The results obtained show a better permanence in situ for the product compared with normal saline injection and to MucoUp® (t-test, p < 0.05).
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Yamazaki K, Moura EGHD, Veras MM, Mestieri LH, Sakai P. USEFULNESS OF GASTRIC SUBMUCOSAL DISSECTION DEPTH TO EVALUATE SKILL ACQUIREMENT IN SHORT TERM TRAINING COURSES IN ESD: AN EXPERIMENTAL STUDY. ARQUIVOS DE GASTROENTEROLOGIA 2018; 55:221-229. [PMID: 30540082 DOI: 10.1590/s0004-2803.201800000-58] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2018] [Accepted: 06/22/2018] [Indexed: 12/28/2022]
Abstract
BACKGROUND Endoscopic submucosal dissection (ESD) is a complex endoscopic procedure, with high rates of adverse events and technical difficulties. To overcome that problem, many training centers published the importance of animal models for skill acquirement in ESD. However, no study has used the submucosal dissection depth (DSUB) as a parameter to evaluate the learning curve in ESD, which might be a relevant factor since an optimal resection plane is important to achieve a curative resection and avoid intraoperative complications. OBJECTIVE This study aimed to assess ESD skill acquirement after short-term training sessions by evaluating the submucosal dissection depth (DSUB) and the association with adverse events. METHODS This experimental study included 25 experienced endoscopists in therapeuthic procedures (>5years) and 75 specimens resected by ESD (three resections / endoscopist). Learning parameters (resection time, size, en bloc resection rate, bleeding, perforation and submucosal dissection depth) were prospectively evaluated. The percentages of DSUB of all specimens resected were calculated. RESULTS All specimens were resected from the gastric body (n=75). The mean size of the resected specimens was 23.97±7.2 mm. The number of adverse events, including bleeding, perforation, and death, were 17 (22.67%), 3 (4%), and 0 cases, respectively. The average mean time by the third dissection decreased from 28.44±9.73 to 18.72±8.81 min (P<0.001). The proportion of DSUB in the bleeding and non-bleeding group were respectively 37.97%±21.13% and 68.66%±23.99%, indicating a significant association between DSUB and bleeding incidence (P<0.001). The ROC curve analysis indicated a cut-off point of 61% (sensitivity, 64%; specificity, 94%) of submucosal dissection depth associated with bleeding. Therefore, when ESD was performed at a depth of >61% of the submucosal layer, the risk for bleeding during the procedure decreased (PPV, 0.97; 95% CI, 0.85-0.99). CONCLUSION Improvement in the learning curve in ESD and a better cognitive ability were seen by the third dissection in these short term training courses. And a significant association between DSUB and the risk of bleeding.
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Affiliation(s)
- Kendi Yamazaki
- Universidade de São Paulo, Faculdade de Medicina, Departamento de Endoscopia Gastrointestinal, SP, Brasil
| | | | - Mariana Matera Veras
- Universidade de São Paulo, Faculdade de Medicina, Departamento de Patologia, SP, Brasil
| | - Luiz Henrique Mestieri
- Universidade de São Paulo, Faculdade de Medicina, Departamento de Endoscopia Gastrointestinal, SP, Brasil
| | - Paulo Sakai
- Universidade de São Paulo, Faculdade de Medicina, Departamento de Endoscopia Gastrointestinal, SP, Brasil
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Chapelle N, Musquer N, Métivier-Cesbron E, Luet D, Volteau C, Le Rhun M, Coron E. Efficacy of a three-day training course in endoscopic submucosal dissection using a live porcine model: a prospective evaluation. United European Gastroenterol J 2018; 6:1410-1416. [PMID: 30386614 DOI: 10.1177/2050640618788694] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/02/2018] [Accepted: 06/18/2018] [Indexed: 12/12/2022] Open
Abstract
Background Endoscopic submucosal dissection is currently regarded as the method of choice for the resection of superficial tumours. The objective of our study was to evaluate prospectively the efficiency of an endoscopic submucosal dissection training course using live anaesthetised pigs. Methods Fourteen novice endoscopists participated in three gastric endoscopic submucosal dissection training courses on anaesthetised pigs. Each trainee resected five 'fake' antral lesions. Resected specimen sizes, endoscopic submucosal dissection speeds and the complication rate were evaluated prospectively. Results Among the 70 procedures performed, 58 could be analysed. There was a strong increase in endoscopic submucosal dissection speed (from 9.7 mm2/minute to 30.4 mm2/minute) during the sessions, marked between the first two endoscopic submucosal dissections compared with the fourth and fifth. There was a significant relation between the surface area of the resected lesion and procedure speed (P < 0.0001). The complication rate was 8.6%. Conclusion There is a clear benefit from endoscopic submucosal dissection training courses on animal models. Improved endoscopist capability is evident from the third endoscopic submucosal dissection. These data validate the indispensable nature of dedicated training courses and echo the European Society of Gastrointestinal Endoscopy proposition for multistep learning, beginning on animal models.
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Affiliation(s)
- Nicolas Chapelle
- CHU de Nantes, Hôtel-Dieu, Hépato-Gastroentérologie, Institut des Maladies de l'Appareil Digestif, Nantes, France
| | - Nicolas Musquer
- CHU de Nantes, Hôtel-Dieu, Hépato-Gastroentérologie, Institut des Maladies de l'Appareil Digestif, Nantes, France.,CEREDI, Faculté de médecine, Angers, France
| | - Elodie Métivier-Cesbron
- CEREDI, Faculté de médecine, Angers, France.,Service de gastro-entérologie, CHU Angers, Angers, France
| | - Dominique Luet
- CEREDI, Faculté de médecine, Angers, France.,Service de gastro-entérologie, CHU Angers, Angers, France
| | | | - Marc Le Rhun
- CHU de Nantes, Hôtel-Dieu, Hépato-Gastroentérologie, Institut des Maladies de l'Appareil Digestif, Nantes, France.,CEREDI, Faculté de médecine, Angers, France
| | - Emmanuel Coron
- CHU de Nantes, Hôtel-Dieu, Hépato-Gastroentérologie, Institut des Maladies de l'Appareil Digestif, Nantes, France.,CEREDI, Faculté de médecine, Angers, France.,Université de Nantes, INSERM, Institut des Maladies de l'Appareil Digestif, The enteric nervous system in gut and brain disorders, Nantes, France
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10
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Kasapidis P, Bassioukas S, Mavrogenis G, Tribonias G, Delis K, Georgopoulos S, Christodoulou D, Emmanouil T, Paraskeva K, Panteris V, Papalois A, Triantafillidis J, Tsiamoulos Z, Fukuhara T, Komeda Y, Kashida H. Experimental gastric endoscopic submucosal dissection: training in a porcine model. Ann Gastroenterol 2017; 30:446-449. [PMID: 28655983 PMCID: PMC5479999 DOI: 10.20524/aog.2017.0147] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/20/2017] [Accepted: 03/05/2017] [Indexed: 12/18/2022] Open
Abstract
Background Endoscopic submucosal dissection (ESD) requires special skills and a long procedure time for a quality-controlled procedure. A universal training system remains to be established. Hands-on courses in animal models before advancing to the human colon appear to be essential, especially in Europe. The learning curve is a prerequisite in ESD, in order to improve technical outcomes and decrease the rate of procedural adverse events. Methods In the experimental research center of ELPEN Pharmaceuticals, 18 European endoscopists, inexperienced at ESD, performed gastric ESDs in porcine models. The course lasted two days and was conducted under the supervision of experts. Results A total of 72 of 76 ESDs were completed en bloc (94.7%). The procedural time and cutting speed differed significantly between the first and second day: 48±4.4 vs. 43±4.8 min (P=0.0045), and 1.38±0.20 vs. 1.63±0.23 cm2/min (P=0.0033), respectively. The complications were not significantly different between the two groups: five (13.88%) vs. four (11%) episodes of bleeding (P>0.05). The perforation rate was similar, at two episodes per day (5.55%). We documented an acceptable rate of en bloc resections and complications. Conclusion ESD demands a new level of endoscopic skills in Europe. A formal sequential training program, using porcine models, may benefit countries with a low volume of cases.
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Affiliation(s)
- Panagiotis Kasapidis
- Head, Department of Gastroenterology and Endoscopy Unit, Central Clinic, Athens, Greece (Panagiotis Kasapidis)
| | | | - Georgios Mavrogenis
- Department of Endoscopy, Mediterraneo Hospital, Athens, Greece (Georgios Mavrogenis)
| | - Georgios Tribonias
- Department of Endoscopy, Eugenideio Hospital, Athens, Greece (Georgios Tribonias)
| | - Konstantinos Delis
- Department of Gastroenterology, Metropolitan Hospital, Piraeus, Greece (Konstantinos Delis)
| | - Sotirios Georgopoulos
- Department of Gastroenterology and Endoscopy Unit, Athens Medical Center, Faliron, Athens, Greece (Sotirios Georgopoulos)
| | - Dimitrios Christodoulou
- Gastroenterology Department, University of Ioannina, School of Medicine, Ioannina, Greece (Dimitrios Christodoulou)
| | | | - Konstantina Paraskeva
- Department of Gastroenterology, Konstantopoulion General Hospital, Athens, Greece (Konstantina Paraskeva)
| | | | | | | | - Zacharias Tsiamoulos
- GI Endoscopy East Kent University Hospitals Trust Senior Clinical Researcher, Imperial College, London St Mark's Hospital/Academic Institute, United Kingdom (Zacharias Tsiamoulos)
| | - Takataro Fukuhara
- Department of Molecular Genetics, Institute for Biomedical Science, Division of Gastroenterology and Hepatology, The Third Department of Internal Medicine, Kansai Medical University, Hirakata, Osaka, Japan (Takataro Fukuhara)
| | - Yoriaki Komeda
- Department of Gastroenterology and Hepatology, Ohno-Higashi, Osaka-Sayama, Osaka, Japan, Faculty of Medicine, Kindai University (Yoriaki Komeda, Hiroshi Kashida)
| | - Hiroshi Kashida
- Department of Gastroenterology and Hepatology, Ohno-Higashi, Osaka-Sayama, Osaka, Japan, Faculty of Medicine, Kindai University (Yoriaki Komeda, Hiroshi Kashida)
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11
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Akutsu D, Suzuki H, Narasaka T, Terasaki M, Kaneko T, Matsui H, Mizokami Y, Hyodo I. Waterjet submucosal dissection of porcine esophagus with the HybridKnife and ERBEJET 2 system: a pilot study. Endosc Int Open 2017; 5:E30-E34. [PMID: 28337481 PMCID: PMC5361881 DOI: 10.1055/s-0042-122335] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
Background and study aims Esophageal endoscopic submucosal dissection (ESD) is technically difficult because of narrow working spaces and ease of perforation due to the lack of serosa. HybridKnife is a recently developed ESD device that is combined with the high pressure waterjet ERBEJET 2 system to lift mucosa. We hypothesized that this waterjet could make submucosal dissection safer and studied this in porcine esophagus. Materials and methods Water pressures of 30 - 70 bar were tested to determine the appropriate pressure for waterjet ESD with HybridKnife (WJ-ESD) in one pig. WJ-ESD safety and completion were compared with those of conventional ESD using DualKnife (C-ESD) as a reference. Each of three virtual esophageal lesions in two pigs were resected alternatively using both methods from the lower to upper esophagus. For WJ-ESD, the submucosa, apart from hard fibrous tissues, was dissected using water pressure alone. Results Using 50 bar of water pressure resulted in the best balance between proper dissection and view-disturbing water backflow. The dissection speeds for the lower, middle, and upper esophagus were 0.2, 0.9, and 0.2 cm2/min in 50 bar WJ-ESD and 1.1, 0.5, and 1.0 cm2/min in C-ESD, respectively. Minor bleeding was frequent in WJ-ESD, but was easily stopped by electrocoagulation with the same needle. No perforation was observed in either procedure. Thermal damage to dissected tissues appeared mild, and the extent of muscle injury was lower for WJ-ESD (4, 6, and 8 %) compared with C-ESD (14, 16, and 7 %). Conclusions WJ-ESD could be completed safely for porcine esophagus with less damage to the muscle layer compared with C-ESD.
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Affiliation(s)
- Daisuke Akutsu
- Department of Gastroenterology, University of Tsukuba, 1-1-1, Tennodai, Tsukuba, Ibaraki, Japan,Corresponding author Daisuke Akutsu, MD Department of GastroenterologyUniversity of Tsukuba1-1-1, TennodaiTsukubaIbaraki 305-8575Japan+81-29-8533218
| | - Hideo Suzuki
- Division of Endoscopy, University of Tsukuba Hospital, 2-1-1, Amakubo, Tsukuba, Ibaraki, Japan
| | - Toshiaki Narasaka
- Department of Gastroenterology, University of Tsukuba, 1-1-1, Tennodai, Tsukuba, Ibaraki, Japan
| | - Masahiko Terasaki
- Department of Gastroenterology, University of Tsukuba, 1-1-1, Tennodai, Tsukuba, Ibaraki, Japan
| | - Tsuyoshi Kaneko
- Department of Gastroenterology, University of Tsukuba, 1-1-1, Tennodai, Tsukuba, Ibaraki, Japan
| | - Hirofumi Matsui
- Department of Gastroenterology, University of Tsukuba, 1-1-1, Tennodai, Tsukuba, Ibaraki, Japan
| | - Yuji Mizokami
- Division of Endoscopy, University of Tsukuba Hospital, 2-1-1, Amakubo, Tsukuba, Ibaraki, Japan
| | - Ichinosuke Hyodo
- Department of Gastroenterology, University of Tsukuba, 1-1-1, Tennodai, Tsukuba, Ibaraki, Japan
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Jacques J, Legros R, Charissoux A, Mesturoux L, Couquet CY, Carrier P, Tabouret T, Valgueblasse V, Debette-Gratien M, Le-Sidaner A, Loustaud-Ratti V, Sautereau D. A local structured training program with live pigs allows performing ESD along the gastrointestinal tract with results close to those of Japanese experts. Dig Liver Dis 2016; 48:1457-1462. [PMID: 27590842 DOI: 10.1016/j.dld.2016.08.111] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/17/2016] [Revised: 06/12/2016] [Accepted: 08/08/2016] [Indexed: 12/11/2022]
Abstract
BACKGROUND AND AIMS The high specific skill needed by ESD limit its widespread use in Europe and animal training is recommended in Europe to improve the results of ESD that are far from Japanese at present. We create a local training program using live pigs as models, along with our human cases, to provide continuous exposure to the technique. METHODS Between February 2013 and December 2015, two young operators performed 55 pig gastric ESDs in parallel with 62 human cases for large superficial cancerous lesions. The number and training dates of pig cases were adapted to those of the human cases to achieve continuous exposure to ESD cases. RESULTS The en bloc, R0, and curative resection rates were 100%, 85.5% (53/62), and 77.5% (48/62), respectively with no recurrence observed during the one year follow up. There was no statistically significant difference in terms of the R0 or curative resection rates among ESDs performed during 2013-2015 (R0: 80% vs. 86.6% vs. 86.4%; Curative: 80% vs. 86.6% vs. 73%). CONCLUSION A local structured training program using live pig models was used to train endoscopists for ESD in humans with high safety and efficiency, similar to results published by Japanese experts.
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Affiliation(s)
- Jérémie Jacques
- Hepato-Gastro-Enterology Department, University Hospital, Limoges, France.
| | - Romain Legros
- Hepato-Gastro-Enterology Department, University Hospital, Limoges, France.
| | | | | | | | - Paul Carrier
- Hepato-Gastro-Enterology Department, University Hospital, Limoges, France.
| | - Tessa Tabouret
- Hepato-Gastro-Enterology Department, University Hospital, Limoges, France.
| | | | | | - Anne Le-Sidaner
- Hepato-Gastro-Enterology Department, University Hospital, Limoges, France.
| | | | - Denis Sautereau
- Hepato-Gastro-Enterology Department, University Hospital, Limoges, France.
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13
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Akintoye E, Obaitan I, Muthusamy A, Akanbi O, Olusunmade M, Levine D. Endoscopic submucosal dissection of gastric tumors: A systematic review and meta-analysis. World J Gastrointest Endosc 2016; 8:517-532. [PMID: 27606044 PMCID: PMC4980641 DOI: 10.4253/wjge.v8.i15.517] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/26/2016] [Revised: 06/11/2016] [Accepted: 07/13/2016] [Indexed: 02/05/2023] Open
Abstract
AIM: To systematically review the medical literature in order to evaluate the safety and efficacy of gastric endoscopic submucosal dissection (ESD).
METHODS: We performed a comprehensive literature search of MEDLINE, Ovid, CINAHL, and Cochrane for studies reporting on the clinical efficacy and safety profile of gastric ESD.
RESULTS: Twenty-nine thousand five hundred and six tumors in 27155 patients (31% female) who underwent gastric ESD between 1999 and 2014 were included in this study. R0 resection rate was 90% (95%CI: 87%-92%) with significant between-study heterogeneity (P < 0.001) which was partly explained by difference in region (P = 0.02) and sample size (P = 0.04). Endoscopic en bloc and curative resection rates were 94% (95%CI: 93%-96%) and 86% (95%CI: 83%-89%) respectively. The rate of immediate and delayed perforation rates were 2.7% (95%CI: 2.1%-3.3%) and 0.39% (95%CI: 0.06%-2.4%) respectively while rates of immediate and delayed major bleeding were 2.9% (95%CI: 1.3-6.6) and 3.6% (95%CI: 3.1%-4.3%). After an average follow-up of about 30 mo post-operative, the rate of tumor recurrence was 0.02% (95%CI: 0.001-1.4) among those with R0 resection and 7.7% (95%CI: 3.6%-16%) among those without R0 resection. Overall, irrespective of the resection status, recurrence rate was 0.75% (95%CI: 0.42%-1.3%).
CONCLUSION: Our meta-analysis, the largest and most comprehensive assessment of gastric ESD till date, showed that gastric ESD is safe and effective for gastric tumors and warrants consideration as first line therapy when an expert operator is available.
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14
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Endoscopic Submucosal Dissection (ESD) and Related Techniques as Precursors of "New Notes" Resection Methods for Gastric Neoplasms. Gastrointest Endosc Clin N Am 2016; 26:313-322. [PMID: 27036900 DOI: 10.1016/j.giec.2015.12.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Endoscopic full-thickness resection for subepithelial tumors is one of the more attractive proposed methods for less-invasive transluminal surgery but remains challenging in terms of safety and feasibility. Currently, laparoscopic endoscopic cooperative surgery is thought to be a more clinically acceptable approach. In targeting cancers, however, more advanced nonexposure techniques are required to avoid the risk of iatrogenic tumor seeding. By combining these techniques with possible regional lymphadenectomy using sentinel node navigation surgery, an ideal minimally invasive, function-preserving gastric resection can be achieved even in possible node-positive cancers. Further development for this type of advanced endoscopic surgery is expected.
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15
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Oyama T, Yahagi N, Ponchon T, Kiesslich T, Berr F. How to establish endoscopic submucosal dissection in Western countries. World J Gastroenterol 2015; 21:11209-11220. [PMID: 26523097 PMCID: PMC4616199 DOI: 10.3748/wjg.v21.i40.11209] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/05/2015] [Revised: 08/06/2015] [Accepted: 09/30/2015] [Indexed: 02/07/2023] Open
Abstract
Endoscopic submucosal dissection (ESD) has been invented in Japan to provide resection for cure of early cancer in the gastrointestinal tract. Professional level of ESD requires excellent staging of early neoplasias with image enhanced endoscopy (IEE) to make correct indications for ESD, and high skills in endoscopic electrosurgical dissection. In Japan, endodiagnostic and endosurgical excellence spread through personal tutoring of skilled endoscopists by the inventors and experts in IEE and ESD. To translocate this expertise to other continents must overcome two fundamental obstacles: (1) inadequate expectations as to the complexity of IEE and ESD; and (2) lack of suitable lesions and master-mentors for ESD trainees. Leading endoscopic mucosal resection-proficient endoscopists must pioneer themselves through the long learning curve to proficient ESD experts. Major referral centers for ESD must arise in Western countries on comparable professional level as in Japan. In the second stage, the upcoming Western experts must commit themselves to teach skilled endoscopists from other referral centers, in order to spread ESD in Western countries. Respect for patients with early gastrointestinal cancer asks for best efforts to learn endoscopic categorization of early neoplasias and skills for ESD based on sustained cooperation with the masters in Japan. The strategy is discussed here.
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16
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Kikuchi D, Kuribayashi Y, Iizuka T, Nomura K, Kimura R, Yamada A, Yamashita S, Furuhata T, Matsui A, Mitani T, Ogawa O, Hoteya S, Kaise M. Ex vivo comparison study of smart Shooter®, a new endoscopic device for safe and speedy treatment. Digestion 2015; 91:26-9. [PMID: 25632913 DOI: 10.1159/000368767] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
BACKGROUND In many endoscopic procedures, the operative view can be compromised when manipulating the treatment device because the endoscopists must release their hand from the endoscope. We have developed a new device called the Smart Shooter® (SS) for simultaneous manipulation of the endoscope and treatment device, and evaluated the utility of the SS compared with the conventional method. METHODS The SS is a semirigid, loop-shaped channel extender that enables endoscopists to manipulate the treatment device with the thumb of the right hand while holding the endoscope with the same hand. We conducted a comparative study of gastric endoscopic submucosal dissection (ESD) and esophageal injection sclerotherapy (EIS) in a porcine model to compare the utility of the SS method with the conventional method. RESULTS In gastric ESD, all lesions were resected en bloc with no perforation. The mean operative time was significantly shorter with the SS method than with the conventional method (287.5 ± 155.4 vs. 403.5 ± 215.6 s, p = 0.04). In esophageal EIS, 4 paravenous injections were given with the SS method and 5 were given using the conventional method. Similarly, the mean operative time was significantly shorter with the SS method than with the conventional method (19.0 ± 7.8 vs. 23.8 ± 10.0 s, p = 0.04). CONCLUSION Use of the SS enabled a shorter operative time for gastric ESD and esophageal EIS with no adverse events. The present results suggest that the SS can contribute to safe and speedy endoscopic treatment.
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Affiliation(s)
- Daisuke Kikuchi
- Department of Gastroenterology, Toranomon Hospital, Tokyo, Japan
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Gallardo Cabrera VE, Hernández Mondragón O, Rascón Martínez DM, Blanco Velasco G, Ramos González R, Tun Abraham AE, Blancas Valencia JM. Disección endoscópica submucosa: curva de aprendizaje en modelos porcinos. ENDOSCOPIA 2015. [DOI: 10.1016/j.endomx.2015.08.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Tanimoto MA, Guerrero ML, Morita Y, Aguirre-Valadez J, Gomez E, Moctezuma-Velazquez C, Estradas-Trujillo JA, Valdovinos MA, Uscanga LF, Fujita R. Impact of formal training in endoscopic submucosal dissection for early gastrointestinal cancer: A systematic review and a meta-analysis. World J Gastrointest Endosc 2015; 7:417-428. [PMID: 25901222 PMCID: PMC4400632 DOI: 10.4253/wjge.v7.i4.417] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/07/2014] [Accepted: 02/09/2015] [Indexed: 02/05/2023] Open
Abstract
AIM: To summarize the clinical impact of a formal training for the effectiveness and safety of endoscopic submucosal dissection for gastrointestinal cancer.
METHODS: We searched databases including PubMed, EMBASE and the Cochrane Library and Science citation Index updated to August 2014 to include eligible articles. In the Meta-analysis, the main outcome measurements were en bloc resection rate, local recurrence rate (R0) and the incidence of procedure-related complications (perforation, bleeding).
RESULTS: En bloc resection was high for both, dissecting stomach tumors with an overall percentage of 93.2% (95%CI: 90.5-95.8) and dissecting colorectal tumors with an overall percentage of 89.4% (95%CI: 85.1-93.7). Although the number of studies reporting R0 resection (the dissected specimen was revealed free of tumor in both vertical and lateral margins) was small, the overall estimates for R0 resection were 81.4% (95%CI: 72-90.8) for stomach and 85.9% (95%CI: 77.5-95.5) for colorectal tumors, respectively. The analysis showed that the percentage of immediate perforation and bleeding were very low; 4.96 (95%CI: 3.6-6.3) and 1.4% (95%CI: 0.8-1.9) for colorectal tumors and 3.1% (95%CI: 2.0-4.1) and 4.8% (95%CI: 2.8-6.7) for stomach tumors, respectively.
CONCLUSION: In order to obtain the same rate of success of the analyzed studies it is a necessity to create training centers in the western countries during the “several years” of gastroenterology residence first only to teach EGC diagnose and second only to train endoscopic submucosal dissection.
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Facilitating endoscopic submucosal dissection: the suture-pulley method significantly improves procedure time and minimizes technical difficulty compared with conventional technique: an ex vivo study (with video). Gastrointest Endosc 2014; 80:495-502. [PMID: 24679655 PMCID: PMC4426966 DOI: 10.1016/j.gie.2014.01.050] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/23/2013] [Accepted: 01/29/2014] [Indexed: 02/08/2023]
Abstract
BACKGROUND The lack of countertraction in endoscopic submucosal dissection (ESD) results in increased technical demand and procedure time. Although the suture-pulley method for countertraction has been reported, its effectiveness compared with the traditional ESD technique remains unclear. OBJECTIVE To objectively analyze efficacy of countertraction using the suture-pulley method for ESD. DESIGN Prospective ex vivo animal study. SETTING Animal laboratory. INTERVENTIONS Twenty simulated gastric lesions were created in porcine stomachs by using a standard circular template 30 mm in diameter. In the control arm (n = 10), ESD was performed by using the standard technique. In the suture-pulley arm (N = 10), a circumferential incision was made, and an endoscopic suturing device was used to place the suture pulley. MAIN OUTCOME MEASUREMENTS The primary outcome of this study was total procedure time. RESULTS The median total procedure time with the suture-pulley method was significantly shorter than the traditional ESD technique (median, 25% to 75%, interquartile range [IQR]: 531 seconds [474.3-549.3 seconds] vs 845 seconds [656.3-1547.5 seconds], P < .001). The median time (IQR) for suture-pulley placement was 160.5 seconds (150.0-168.8 seconds). Although there was a significantly longer procedure time for proximal versus middle/lower stomach lesions with traditional ESD (median, 1601 seconds; IQR, 1547.5-1708.8 seconds vs median, 663 seconds; IQR, 627.5-681.8 seconds; P = .01), there was no significant difference in procedure time for lesions of various locations when using the suture-pulley method. Compared with traditional ESD, the suture-pulley method was less demanding in all categories evaluated by the NASA Task Load Index. LIMITATIONS Ex vivo study. CONCLUSIONS The suture-pulley method facilitates direct visualization of the submucosal layer during ESD and significantly reduces procedure time and technical difficulty. In addition, the benefit of the suture-pulley method was seen for both simple and more complicated ESDs.
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Kim YG, Kong SH, Oh SY, Lee KG, Suh YS, Yang JY, Choi J, Kim SG, Kim JS, Kim WH, Lee HJ, Yang HK. Effects of screening on gastric cancer management: comparative analysis of the results in 2006 and in 2011. J Gastric Cancer 2014; 14:129-34. [PMID: 25061541 PMCID: PMC4105378 DOI: 10.5230/jgc.2014.14.2.129] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2014] [Revised: 06/25/2014] [Accepted: 06/25/2014] [Indexed: 12/19/2022] Open
Abstract
Purpose This study aimed to analyze the effect of screening by using endoscopy on the diagnosis and treatment of gastric cancer. Materials and Methods The clinicopathologic characteristics of gastric cancer were compared in individuals who underwent an endoscopy because of symptoms (non-screening group) or for screening purposes (screening group). The distributions of gastric cancer stages and treatment modalities in 2006 and 2011 were compared. Results The proportion of patients in the screening group increased from 45.1% in 2006 to 65.4% in 2011 (P<0.001). The proportion of stage I cancers in the entire patient sample also increased (from 60.5% in 2006 to 70.6% in 2011; P=0.029). In 2011, the percentages of patients with cancer stages I, II, III, and IV were 79.9%, 8.2%, 10.9%, and 1.1%, respectively, in the screening group, and 47.9%, 10.8%, 29.8%, and 11.5%, respectively, in the non-screening group. The proportion of laparoscopic and robotic surgeries increased from 9.6% in 2006 to 48.3% in 2011 (P<0.001), and endoscopic submucosal dissection increased from 9.8% in 2006 to 19.1% 2011 (P<0.001). Conclusions The proportion of patients diagnosed with gastric cancer by using the screening program increased between 2006 and 2011. This increase was associated with a high proportion of early-stage cancer diagnoses and increased use of minimally invasive treatments.
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Affiliation(s)
- Yun Gyoung Kim
- Department of Surgery, Seoul National University College of Medicine, Seoul, Korea
| | - Seong-Ho Kong
- Department of Surgery, Seoul National University College of Medicine, Seoul, Korea
| | - Seung-Young Oh
- Department of Surgery, Seoul National University College of Medicine, Seoul, Korea
| | - Kyung-Goo Lee
- Department of Surgery, Seoul National University College of Medicine, Seoul, Korea
| | - Yun-Suhk Suh
- Department of Surgery, Seoul National University College of Medicine, Seoul, Korea
| | - Jun-Young Yang
- Department of Surgery, Seoul National University College of Medicine, Seoul, Korea
| | - Jeongmin Choi
- Department of Internal Medicine, Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - Sang Gyun Kim
- Department of Internal Medicine, Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - Joo-Sung Kim
- Department of Internal Medicine, Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - Woo Ho Kim
- Department of Pathology, Seoul National University College of Medicine, Seoul, Korea. ; Cancer Research Institute, Seoul National University, Seoul, Korea
| | - Hyuk-Joon Lee
- Department of Surgery, Seoul National University College of Medicine, Seoul, Korea. ; Cancer Research Institute, Seoul National University, Seoul, Korea
| | - Han-Kwang Yang
- Department of Surgery, Seoul National University College of Medicine, Seoul, Korea. ; Cancer Research Institute, Seoul National University, Seoul, Korea
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