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Itonaga M, Kitano M, Ashida R. Development of devices for interventional endoscopic ultrasound for the management of pancreatobiliary diseases. Dig Endosc 2023; 35:302-313. [PMID: 36052861 DOI: 10.1111/den.14428] [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] [Received: 05/15/2022] [Accepted: 08/30/2022] [Indexed: 02/08/2023]
Abstract
A variety of devices have been developed for interventional endoscopic ultrasound (EUS). EUS-guided drainage of the bile duct and pancreatic duct, as well as fluid collection adjacent to the gastrointestinal tract, is performed by a procedure involving puncture, guidewire manipulation, tract dilation, and stent placement. Devices specialized for interventional EUS are being developed for each step of the procedure. Mechanical dilators such as bougie, balloon, and electrocautery dilators are used for tract dilation. Various types of plastic stents, self-expandable metal stents, and lumen-apposing metal stents specifically designed for interventional EUS are now available, including one-step devices developed to improve the efficacy and safety of interventional EUS. In addition, radiofrequency ablation and the placement of fiducial markers and radioactive seeds under EUS guidance are now becoming established for pancreatic neoplasms. Such development of specialized devices has expanded the indications for interventional EUS, increased the success rate, and lowered the adverse event rate.
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Affiliation(s)
- Masahiro Itonaga
- Second Department of Internal Medicine, Wakayama Medical University, Wakayama, Japan
| | - Masayuki Kitano
- Second Department of Internal Medicine, Wakayama Medical University, Wakayama, Japan
| | - Reiko Ashida
- Second Department of Internal Medicine, Wakayama Medical University, Wakayama, Japan
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Usefulness of a newly designed laser-cut metal stent with an anchoring hook and thin delivery system for EUS-guided hepaticogastrostomy in experimental settings (with video). Gastrointest Endosc 2021; 94:999-1008.e1. [PMID: 34181941 DOI: 10.1016/j.gie.2021.06.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/05/2020] [Accepted: 06/18/2021] [Indexed: 12/11/2022]
Abstract
BACKGROUND AND AIMS EUS-guided hepaticogastrostomy (EUS-HGS) is associated with high rates of adverse events. The present study evaluated the feasibility of a newly designed stent equipped with a dilatation and antimigration system for EUS-HGS in phantom and animal models. METHODS The newly designed stent was a partially covered laser-cut stent with antimigration anchoring hooks and a thin tapered tip (7.2F). The feasibility of these stents for biliary obstruction was compared with that of conventional stents. Evaluated outcomes were resistance force to migration in phantom and ex vivo models, rates of technical success and adverse events, and histology in an in vivo model. RESULTS The resistance forces on the distal (3.59 vs 1.73 N and 6.21 vs 1.74 N) and proximal (3.58 vs 1.5 N and 5.97 vs 1.67 N) sides in phantom and ex vivo models were significantly higher for hook stents than for conventional stents. Although EUS-HGS was successfully performed in all cases with both stents (100% [10/10] vs 100% [8/8]), the success rate of EUS-HGS without using a fistulous tract dilation device was significantly higher with hook stents (100% [10/10]) than with conventional stents (13% [1/8]). No adverse events occurred with either stent. Pathologic examination showed adhesion between the stomach and liver. CONCLUSIONS The strong resistance to migration and the absence of the dilation step are important advantages of newly designed hook stents. These stents may therefore be feasible and safe for EUS-HGS.
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Itonaga M, Kitano M, Yoshikawa T, Ashida R, Yamashita Y, Hatamaru K, Takenaka M, Yamazaki T, Ogura T, Nishioka N, Sakai A, Masuda A, Shiomi H, Shimokawa T. Comparison of endoscopic ultrasound-guided choledochoduodenostomy and endoscopic retrograde cholangiopancreatography in first-line biliary drainage for malignant distal bile duct obstruction: A multicenter randomized controlled trial. Medicine (Baltimore) 2021; 100:e25268. [PMID: 33761729 PMCID: PMC9282038 DOI: 10.1097/md.0000000000025268] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Accepted: 03/05/2021] [Indexed: 01/05/2023] Open
Abstract
INTRODUCTION In patients with malignant distal bile duct obstruction and normal gastrointestinal anatomy, endoscopic ultrasound-guided choledochoduodenostomy (EUS-CDS) is indicated when endoscopic retrograde cholangiopancreatography (ERCP) fails. The ERCP drainage route passes through the tumor, whereas the EUS-CDS route does not. Therefore, EUS-CDS is expected to have a longer stent patency than ERCP. However, for first-line biliary drainage, it remains unclear whether EUS-CDS or ERCP is superior in terms of stent patency. To reduce the frequency of highly adverse events (AEs) such as bile peritonitis or stent migration following EUS-CDS, we developed an antimigration metal stent with a thin delivery system for tract dilatation. This study is designed to assess whether EUS-CDS with this novel stent is superior to ERCP with a traditional metal stent in terms of stent patency when the two techniques are used for first-line drainage of malignant distal biliary obstruction. METHODS/DESIGN This study is a multicenter single-blinded randomized controlled trial (RCT) involving 95 patients in four tertiary centers. Patients with malignant distal biliary obstruction that is unresectable or presents a very high surgical risk and who pass the inclusion and exclusion criteria will be randomized to EUS-CDS or ERCP in a 1:1 proportion. The primary endpoint is the stent patency rate 180 days after stent insertion. Secondary outcomes include the rates of technical success, clinical success, technical success in cases not requiring fistulous-tract dilation (only EUS-CDS group), procedure-related AEs, re-intervention success, patients receiving post-drainage chemotherapy, procedure time, and overall survival time. DISCUSSION If EUS-CDS is superior to ERCP in terms of stent patency and safety for the first-line drainage of malignant distal biliary obstruction, it is expected that the first-line drainage method will be changed from ERCP to EUS-CDS, and that interruption of chemotherapy due to stent dysfunction can be avoided. TRIAL REGISTRATION University Hospital Medical Information Network Clinical Trials Registry (UMIN-CTR), ID: UMIN000041343. Registered on August 6, 2020. https://upload.umin.ac.jp/cgi-open-bin/ctr_e/ctr_view.cgi?recptno=R000047201Version number: 1.2, December 7, 2020.
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Affiliation(s)
| | | | | | | | | | | | - Mamoru Takenaka
- Department of Gastroenterology and Hepatology, Kindai University Faculty of Medicine, Osaka
| | - Tomohiro Yamazaki
- Department of Gastroenterology and Hepatology, Kindai University Faculty of Medicine, Osaka
| | - Takeshi Ogura
- The Second Department of Internal Medicine, Osaka Medical College, Takatsuki
| | - Nobu Nishioka
- The Second Department of Internal Medicine, Osaka Medical College, Takatsuki
| | - Arata Sakai
- Division of Gastroenterology, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Atsuhiro Masuda
- Division of Gastroenterology, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Hideyuki Shiomi
- Division of Gastroenterology, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Toshio Shimokawa
- Clinical Study Support Center, Wakayama Medical University, Wakayama
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Tur-Martínez J, García-Olmo DC, Puy S, Muriel P, Protti GP, Boldó A, Gallardo MA, Bazaga S, Pérez-Miranda M, Olsina-Kissler JJ. A new minimally invasive porcine model for the study of intrahepatic bile duct dilatation. Surg Endosc 2020; 35:2817-2822. [PMID: 32556763 DOI: 10.1007/s00464-020-07716-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Accepted: 06/09/2020] [Indexed: 12/26/2022]
Abstract
BACKGROUND Endoscopic ultrasound (EUS) procedures are becoming more frequent nowadays and novel techniques are on the rise. These procedures require high technical experience and complex endoscopic skills. The goal of this study was to develop a new minimally invasive animal model of bile duct dilatation in the pig, in order to offer a new tool for endoscopic and surgical therapy training and to test new therapeutic strategies. METHODS Twenty-five female pigs underwent laparoscopic surgery in order to perform a common hepatic duct ligation. A pre- and postoperative biochemical analyses were performed: glucose, albumin, total bilirubin (TBil), gamma glutamyl transferase (GGT), alkaline phosphatase, and alanine aminotransferase were measured. Surgical time and intra- and postoperative complications were registered. Five to six days after surgery, an EUS was performed to measure intrahepatic duct size (mm). Distance from the bile duct to the EUS transductor was also recorded (mm). T-student for quantitative variables was applied. Statistical significance was defined as p value ≤ 0.05. RESULTS The mean surgical time was 29.5 ± 14.9 min. In five pigs (20%), some mild intraoperative problems occurred. A severe postoperative complication occurred in one animal (4%). No postoperative mortality was registered. Postoperative serum analyses showed an increase in total bilirubin (p = 0.005) and gamma glutamyl transferase levels (p = 0.001). Postoperative EUS showed dilatation of the intrahepatic bile duct in 76% of pigs, with a mean diameter of 9.6 ± 3.6 mm (distance from the gastric wall of 17.0 ± 6.4 mm). CONCLUSION The surgical procedure described here is a safe technique to induce dilatation of the intrahepatic bile ducts in the pig, with a minimally invasive approach and a high efficacy rate. This animal model might be useful for EUS techniques training and for evaluating new therapeutic approaches.
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Affiliation(s)
- Jaume Tur-Martínez
- General Surgery Department, University Hospital Arnau de Vilanova, Lleida, Spain.
- General Surgery Department, University Hospital Mútua Terrassa, Plaça Dr. Robert, 5, 08221, Terrassa, Barcelona, Spain.
| | | | - Sara Puy
- Centre de Recerca Experimental Biomèdica Aplicada (CREBA), IRBLleida, Lleida, Spain
| | - Pablo Muriel
- General Surgery Department, University Hospital Arnau de Vilanova, Lleida, Spain
| | - Gian Pier Protti
- General Surgery Department, University Hospital Arnau de Vilanova, Lleida, Spain
- Centre de Recerca Experimental Biomèdica Aplicada (CREBA), IRBLleida, Lleida, Spain
| | - Alba Boldó
- Centre de Recerca Experimental Biomèdica Aplicada (CREBA), IRBLleida, Lleida, Spain
| | - Mario A Gallardo
- Gastroenterology and Endoscopy Unit, Hospital Universitario Rio Hortega, Valladolid, Spain
| | - Sergio Bazaga
- Gastroenterology and Endoscopy Unit, Hospital Universitario Rio Hortega, Valladolid, Spain
| | - Manuel Pérez-Miranda
- Gastroenterology and Endoscopy Unit, Hospital Universitario Rio Hortega, Valladolid, Spain
| | - Jorge Juan Olsina-Kissler
- General Surgery Department, University Hospital Arnau de Vilanova, Lleida, Spain
- Centre de Recerca Experimental Biomèdica Aplicada (CREBA), IRBLleida, Lleida, Spain
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Oh D, Ligresti D, Seo DW. Novel swine biliary dilatation model with temperature-controlled endobiliary radiofrequency ablation: An effective tool for training in EUS-guided biliary drainage. Endosc Ultrasound 2020; 9:245-251. [PMID: 32675461 PMCID: PMC7528997 DOI: 10.4103/eus.eus_34_20] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Background and Objectives: EUS-guided biliary drainage (EUS-BD) is used as a rescue method after failed endoscopic retrograde cholangiography. However, it is considered a technically challenging procedure. Phantoms and ex vivo biliary dilatation models have been used to enhance the learning of EUS-BD, but they provide a limited level of realism. The aim of this study was to develop a swine biliary dilatation model that uses temperature-controlled endobiliary radiofrequency ablation (EB-RFA) for training in EUS-BD. Materials and Methods: Target temperature-controlled (80°C at 7 or 10 W for 60–120 s) EB-RFA was performed on seven pigs. Two weeks after the EB-RFA, EUS examination was performed to confirm biliary dilatation, and EUS-BD was then attempted by performing a hepaticogastrostomy (HGS) or cholecystogastrostomy (CGS). Results: Twelve sessions of EB-RFA (11 at the distal common bile duct [CBD] and one at the proximal CBD) were successfully performed on the seven pigs. There were no immediate postprocedural adverse events. Two weeks after the procedures, clinical signs of jaundice were observed in all the pigs. EUS examination revealed massive intrahepatic and extrahepatic biliary dilatations in all the pigs, and EUS-BD was attempted in the same session. HGS was performed on six pigs. Technical success was achieved in five of the six pigs (83.3%). Technical failure in HGS occurred during the stent deployment, and CGS was successfully performed on one pig. Conclusions: Our study shows that EB-RFA is an effective minimally invasive method for creating biliary dilatation models. It may be considered suitable for training in EUS-BD.
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Affiliation(s)
- Dongwook Oh
- Department of Gastroenterology, Asan Medical Center, College of Medicine, University of Ulsan, Seoul, South Korea
| | - Dario Ligresti
- Endoscopy Service, Department of Diagnostic and Therapeutic Services, IRCCS-ISMETT (Istituto Mediterraneo per i Trapianti e Terapie ad alta Specializzazione), Palermo, Italy
| | - Dong-Wan Seo
- Department of Gastroenterology, Asan Medical Center, College of Medicine, University of Ulsan, Seoul, South Korea
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Itonaga M, Kitano M, Hatamaru K, Tamura T, Nuta J, Kawaji Y, Takenaka M, Minaga K, Kudo M, Ogura T, Higuchi K, Chiba Y. Endoscopic ultrasound-guided choledochoduodenostomy using a thin stent delivery system in patients with unresectable malignant distal biliary obstruction: A prospective multicenter study. Dig Endosc 2019; 31:291-298. [PMID: 30444543 DOI: 10.1111/den.13300] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Accepted: 11/11/2018] [Indexed: 02/08/2023]
Abstract
BACKGROUND AND AIM When endoscopic retrograde cholangiopancreatography (ERCP) fails in patients with malignant distal biliary obstruction, endoscopic ultrasound-guided choledochoduodenostomy (EUS-CDS) is an alternative. It has high technical and clinical success rates, but also has high adverse event rates. This prospective cohort study was aimed to evaluate the clinical efficacy and safety of EUS-CDS with our newly developed partially covered self-expandable metal stent with a thin delivery system. METHODS Patients consisted of all consecutive patients in three tertiary referral centers with unresectable malignant distal obstruction in whom ERCP failed and in whom EUS-CDS with the thin delivery system was selected as the second-line approach. Rates of clinical success, technical success, technical success in cases not requiring fistulous tract dilation, adverse events, and stent dysfunction were determined. RESULTS In the 20 patients, technical and clinical success rates were 95.0% (19/20) and 100% (19/19), respectively. In 31.6% (6/19), the delivery system was successfully inserted into the bile duct without requiring a fistulous-tract dilatation device. These patients had significantly shorter procedure times than patients requiring fistulous-tract dilatation (12.7 ± 3.1 vs 23.2 ± 2.1 min; P < 0.01). One patient (5.0%) who required fistulous dilation had an adverse event, which was managed conservatively. There were no procedure-related deaths. During follow up, four patients (21.1%) developed stent dysfunction. Reintervention was successful in all cases. CONCLUSIONS The EUS-CDS approach had 95% technical and 100% clinical success rates, with adverse events reported in 5% of cases. EUS-CDS may become safer if efforts are made to avoid the dilation step (UMIN 000023938).
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Affiliation(s)
- Masahiro Itonaga
- Second Department of Internal Medicine, Wakayama Medical University, Wakayama, Japan
| | - Masayuki Kitano
- Second Department of Internal Medicine, Wakayama Medical University, Wakayama, Japan
| | - Keiichi Hatamaru
- Second Department of Internal Medicine, Wakayama Medical University, Wakayama, Japan
| | - Takashi Tamura
- Second Department of Internal Medicine, Wakayama Medical University, Wakayama, Japan
| | - Junya Nuta
- Second Department of Internal Medicine, Wakayama Medical University, Wakayama, Japan
| | - Yuki Kawaji
- Second Department of Internal Medicine, Wakayama Medical University, Wakayama, Japan
| | | | - Kosuke Minaga
- Department of Gastroenterology and Hepatology, Osaka, Japan
| | - Masatoshi Kudo
- Department of Gastroenterology and Hepatology, Osaka, Japan
| | - Takeshi Ogura
- Second Department of Internal Medicine, Osaka Medical College, Osaka, Japan
| | - Kazuhide Higuchi
- Second Department of Internal Medicine, Osaka Medical College, Osaka, Japan
| | - Yasutaka Chiba
- Clinical Research Center, Kindai University Faculty of Medicine, Osaka, Japan
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