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Yoon SB, Yang MJ, Shin DW, Soh JS, Lim H, Kang HS, Moon SH. Endoscopic ultrasound-rendezvous versus percutaneous-endoscopic rendezvous endoscopic retrograde cholangiopancreatography for bile duct access: Systematic review and meta-analysis. Dig Endosc 2024; 36:129-140. [PMID: 37432952 DOI: 10.1111/den.14636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Accepted: 07/06/2023] [Indexed: 07/13/2023]
Abstract
OBJECTIVES Endoscopic ultrasound (EUS) or percutaneous-assisted antegrade guidewire insertion can be used to achieve biliary access when standard endoscopic retrograde cholangiopancreatography (ERCP) fails. We conducted a systematic review and meta-analysis to evaluate and compare the effectiveness and safety of EUS-assisted rendezvous (EUS-RV) and percutaneous rendezvous (PERC-RV) ERCP. METHODS We searched multiple databases from inception to September 2022 to identify studies reporting on EUS-RV and PERC-RV in failed ERCP. A random-effects model was used to summarize the pooled rates of technical success and adverse events with 95% confidence interval (CI). RESULTS In total, 524 patients (19 studies) and 591 patients (12 studies) were managed by EUS-RV and PERC-RV, respectively. The pooled technical successes were 88.7% (95% CI 84.6-92.8%, I2 = 70.5%) for EUS-RV and 94.1% (95% CI 91.1-97.1%, I2 = 59.2%) for PERC-RV (P = 0.088). The technical success rates of EUS-RV and PERC-RV were comparable in subgroups of benign diseases (89.2% vs. 95.8%, P = 0.068), malignant diseases (90.3% vs. 95.5%, P = 0.193), and normal anatomy (90.7% vs. 95.9%, P = 0.240). However, patients with surgically altered anatomy had poorer technical success after EUS-RV than after PERC-RV (58.7% vs. 93.1%, P = 0.036). The pooled rates of overall adverse events were 9.8% for EUS-RV and 13.4% for PERC-RV (P = 0.686). CONCLUSIONS Both EUS-RV and PERC-RV have exhibited high technical success rates. When standard ERCP fails, EUS-RV and PERC-RV are comparably effective rescue techniques if adequate expertise and facilities are feasible. However, in patients with surgically altered anatomy, PERC-RV might be the preferred choice over EUS-RV because of its higher technical success rate.
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Affiliation(s)
- Seung Bae Yoon
- Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, South Korea
| | - Min Jae Yang
- Department of Gastroenterology, Ajou University School of Medicine, Suwon, South Korea
| | - Dong Woo Shin
- Department of Internal Medicine, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, South Korea
- Institute for Liver and Digestive Diseases, Hallym University, Chuncheon, South Korea
| | - Jae Seung Soh
- Department of Internal Medicine, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, South Korea
- Institute for Liver and Digestive Diseases, Hallym University, Chuncheon, South Korea
| | - Hyun Lim
- Department of Internal Medicine, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, South Korea
- Institute for Liver and Digestive Diseases, Hallym University, Chuncheon, South Korea
| | - Ho Suk Kang
- Department of Internal Medicine, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, South Korea
- Institute for Liver and Digestive Diseases, Hallym University, Chuncheon, South Korea
| | - Sung-Hoon Moon
- Department of Internal Medicine, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, South Korea
- Institute for Liver and Digestive Diseases, Hallym University, Chuncheon, South Korea
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Giri S, Mohan BP, Jearth V, Kale A, Angadi S, Afzalpurkar S, Harindranath S, Sundaram S. Adverse events with EUS-guided biliary drainage: a systematic review and meta-analysis. Gastrointest Endosc 2023; 98:515-523.e18. [PMID: 37392952 DOI: 10.1016/j.gie.2023.06.055] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Revised: 06/01/2023] [Accepted: 06/20/2023] [Indexed: 07/03/2023]
Abstract
BACKGROUND AND AIMS Multiple meta-analyses have evaluated the technical and clinical success of EUS-guided biliary drainage (BD), but meta-analyses concerning adverse events (AEs) are limited. The present meta-analysis analyzed AEs associated with various types of EUS-BD. METHODS A literature search of MEDLINE, Embase, and Scopus was conducted from 2005 to September 2022 for studies analyzing the outcome of EUS-BD. The primary outcomes were incidence of overall AEs, major AEs, procedure-related mortality, and reintervention. The event rates were pooled using a random-effects model. RESULTS One hundred fifty-five studies (7887 patients) were included in the final analysis. The pooled clinical success rates and incidence of AEs with EUS-BD were 95% (95% confidence interval [CI], 94.1-95.9) and 13.7% (95% CI, 12.3-15.0), respectively. Among early AEs, bile leak was the most common followed by cholangitis with pooled incidences of 2.2% (95% CI, 1.8-2.7) and 1.0% (95% CI, .8-1.3), respectively. The pooled incidences of major AEs and procedure-related mortality with EUS-BD were .6% (95% CI, .3-.9) and .1% (95% CI, .0-.4), respectively. The pooled incidences of delayed migration and stent occlusion were 1.7% (95% CI, 1.1-2.3) and 11.0% (95% CI, 9.3-12.8), respectively. The pooled event rate for reintervention (for stent migration or occlusion) after EUS-BD was 16.2% (95% CI, 14.0-18.3; I2 = 77.5%). CONCLUSIONS Despite a high clinical success rate, EUS-BD may be associated with AEs in one-seventh of the cases. However, major AEs and mortality incidence remain less than 1%, which is reassuring.
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Affiliation(s)
- Suprabhat Giri
- Department of Gastroenterology, Nizam's Institute of Medical Sciences, Hyderabad, India
| | - Babu P Mohan
- Department of Gastroenterology, University of Utah, Salt Lake City, Utah, USA
| | - Vaneet Jearth
- Department of Gastroenterology, Post Graduate Institute of Medical Education & Research, Chandigarh, India
| | - Aditya Kale
- Department of Gastroenterology, Seth GS Medical College and KEM Hospital, Mumbai, India
| | - Sumaswi Angadi
- Department of Gastroenterology, Nizam's Institute of Medical Sciences, Hyderabad, India
| | - Shivaraj Afzalpurkar
- Department of Gastroenterology, Nanjappa Multispecialty Hospital, Davanagere, India
| | - Sidharth Harindranath
- Department of Gastroenterology, Seth GS Medical College and KEM Hospital, Mumbai, India
| | - Sridhar Sundaram
- Department of Digestive Diseases and Clinical Nutrition, Tata Memorial Hospital, Homi Bhabha National Institute, Mumbai, India
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Effectiveness and Safety of EUS Rendezvous After Failed Biliary Cannulation With ERCP: A Systematic Review and Proportion Meta-analysis. J Clin Gastroenterol 2023; 57:211-217. [PMID: 34009843 DOI: 10.1097/mcg.0000000000001543] [Citation(s) in RCA: 15] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Accepted: 03/08/2021] [Indexed: 01/07/2023]
Abstract
BACKGROUND Endoscopic ultrasound-guided rendezvous (EUS-RV) endoscopic retrograde cholangiopancreatography (ERCP) is an alternative to interventional radiology-guided rendezvous ERCP in patients who failed biliary cannulation with conventional ERCP. However, there is significant variation in reported rates of success and adverse events associated with EUS-RV-assisted ERCP. We performed a systematic review and a proportion meta-analysis to reliably assess the effectiveness and safety of the EUS-RV-assisted ERCP. MATERIALS AND METHODS We conducted a comprehensive search of multiple electronic databases and conference proceedings (from inception through August 2020) to identify studies reporting EUS-RV-assisted ERCP in patients who failed biliary cannulation with conventional ERCP techniques. Using the random-effects model described by DerSimonian and Laird, we calculated the pooled rates of technical success, clinical success, and adverse events of EUS-RV-assisted ERCP. RESULTS Twelve studies reporting a total of 342 patients were included in the meta-analysis. The pooled rate of technical success (12 studies reporting a total of 342 patients) was 86.1% [95% confidence interval (CI): 78.4-91.3]. The pooled rate of clinical success (4 studies reporting a total of 94 patients) was 80.8% (95% CI: 64.1-90.8). The pooled rate of overall adverse events (12 studies; 42 events in 342 patients) was 14% (95% CI: 10.5-18.4). Low to moderate heterogeneity was noted in the analyses. CONCLUSIONS EUS-RV-assisted ERCP appears to be effective and safe in patients who failed biliary cannulation with conventional ERCP. Given the risk of adverse events, it should be performed in centers with expertise in therapeutic endoscopic ultrasound.
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Dietrich CF, Braden B, Burmeister S, Aabakken L, Arciadacono PG, Bhutani MS, Götzberger M, Healey AJ, Hocke M, Hollerbach S, Ignee A, Jenssen C, Jürgensen C, Larghi A, Moeller K, Napoléon B, Rimbas M, Săftoiu A, Sun S, Bun Teoh AY, Vanella G, Fusaroli P, Carrara S, Will U, Dong Y, Burmester E. How to perform EUS-guided biliary drainage. Endosc Ultrasound 2022; 11:342-354. [PMID: 36255022 PMCID: PMC9688140 DOI: 10.4103/eus-d-21-00188] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
EUS-guided biliary drainage (EUS-BD) has recently gained widespread acceptance as a minimally invasive alternative method for biliary drainage. Even in experienced endoscopy centers, ERCP may fail due to inaccessibility of the papillary region, altered anatomy (particularly postsurgical alterations), papillary obstruction, or neoplastic gastric outlet obstruction. Biliary cannulation fails at first attempt in 5%-10% of cases even in the absence of these factors. In such cases, alternative options for biliary drainage must be provided since biliary obstruction is responsible for poor quality of life and even reduced survival, particularly due to septic cholangitis. The standard of care in many centers remains percutaneous transhepatic biliary drainage (PTBD). However, despite the high technical success rate with experienced operators, the percutaneous approach is more invasive and associated with poor quality of life. PTBD may result in long-term external catheters for biliary drainage and carry the risk of serious adverse events (SAEs) in up to 10% of patients, including bile leaks, hemorrhage, and sepsis. PTBD following a failed ERCP also requires scheduling a second procedure, resulting in prolonged hospital stay and additional costs. EUS-BD may overcome many of these limitations and offer some distinct advantages in accessing the biliary tree. Current data suggest that EUS-BD is safe and effective when performed by experts, although SAEs have been also reported. Despite the high number of clinical reports and case series, high-quality comparative studies are still lacking. The purpose of this article is to report on the current status of this procedure and to discuss the tools and techniques for EUS-BD in different clinical scenarios.
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Affiliation(s)
- Christoph F. Dietrich
- Department of Ultrasound, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China,Department of Allgemeine Innere Medizin der Kliniken (DAIM) Hirslanden Beau Site, Salem und Permanence, Bern, Switzerland,Address for correspondence Dr. Christoph F. Dietrich, Department Allgemeine Innere Medizin, Kliniken Hirslanden Beau Site, Salem und Permancence, Bern, Switzerland. E-mail:
| | - Barbara Braden
- Translational Gastroenterology Unit, Oxford University Hospitals, Oxford, UK
| | - Sean Burmeister
- Hepato-Pancreatico-Biliary Unit, Groote Schuur Hospital, Cape Town, South Africa
| | - Lars Aabakken
- Department of Transplantation Medicine, Oslo University Hospital, Oslo, Norway
| | - Paolo Giorgio Arciadacono
- Division of Pancreatobiliary Endoscopy and Endosonography, IRCCS San Raffaele Scientific Institute, Vita-Salute San Raffaele University, Milan, Italy
| | - Manoop S. Bhutani
- Department of Gastroenterology Hepatology and Nutrition, UTMD Anderson Cancer Center, Houston, Texas, USA
| | - Manuela Götzberger
- Department of Gastroenterology and Hepatology, München Klinik Neuperlach und Harlaching, Munich, Germany
| | | | - Michael Hocke
- Medical Department II, Helios Klinikum Meiningen, Meiningen, Germany
| | - Stephan Hollerbach
- Department of Gastroenterology, Allgemeines Krankenhaus Celle, Celle, Germany
| | - André Ignee
- Caritas-Krankenhaus, Bad Mergentheim, Germany
| | - Christian Jenssen
- Medical Department, Krankenhaus Maerkisch-Oderland, Strausberg and Brandenburg Institute of Clinical Ultrasound at Medical University Brandenburg, Neuruppin, Germany
| | | | - Alberto Larghi
- Digestive Endoscopy Unit, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
| | - Kathleen Moeller
- Department of Medical I/Gastroenterology, SANA Hospital Lichtenberg, Berlin, Germany
| | | | - Mihai Rimbas
- Department of Gastroenterology, Clinic of Internal Medicine, Colentina Clinical Hospital, Carol Davila University of Medicine, Bucharest, Romania
| | - Adrian Săftoiu
- Department of Gastroenterology, Research Center of Gastroenterology and Hepatology, University of Medicine and Pharmacy Craiova, Craiova, Romania
| | - Siyu Sun
- Department of Endoscopy Center, Shengjing Hospital of China Medical University, Liaoning Province, China
| | - Anthony Yuen Bun Teoh
- Department of Surgery, Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Giuseppe Vanella
- Division of Pancreatobiliary Endoscopy and Endosonography, IRCCS San Raffaele Scientific Institute, Vita-Salute San Raffaele University, Milan, Italy
| | - Pietro Fusaroli
- Department of Medical and Surgical Sciences, Gastrointestinal Unit, University of Bologna/Hospital of Imola, Imola, Italy
| | - Silvia Carrara
- Division of Gastroenterology, Humanitas Clinical and Research Center, Digestive Endoscopy Unit, Milan, Italy
| | - Uwe Will
- Department of Gastroenterology, SRH Klinikum Gera, Gera, Germany
| | - Yi Dong
- Department of Ultrasound, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Eike Burmester
- Medizinische Klinik I, Sana Kliniken Luebeck, Luebeck, Germany
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Tsou YK, Pan KT, Lee MH, Lin CH. Endoscopic salvage therapy after failed biliary cannulation using advanced techniques: A concise review. World J Gastroenterol 2022; 28:3803-3813. [PMID: 36157537 PMCID: PMC9367240 DOI: 10.3748/wjg.v28.i29.3803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/13/2022] [Revised: 04/15/2022] [Accepted: 07/06/2022] [Indexed: 02/06/2023] Open
Abstract
Therapeutic endoscopic retrograde cholangiopancreatography (ERCP) begins with successful biliary cannulation. However, it is not always be successful. The failure of the initial ERCP is attributed to two main aspects: the papilla/biliary orifice is endoscopically accessible, or it is inaccessible. When the papilla/biliary orifice is accessible, bile duct cannulation failure can occur even with advanced cannulation techniques, including double guidewire techniques, transpancreatic sphincterotomy, needle-knife precut papillotomy, or fistulotomy. There is currently no consensus on the next steps of treatment in this setting. Therefore, this review aims to propose and discuss potential endoscopic options for patients who have failed ERCP due to difficult bile duct cannulation. These options include interval ERCP, percutaneous-transhepatic-endoscopic rendezvous procedures (PTE-RV), and endoscopic ultrasound-assisted rendezvous procedures (EUS-RV). The overall success rate for interval ERCP was 76.3% (68%-79% between studies), and the overall adverse event rate was 7.5% (0-15.9% between studies). The overall success rate for PTE-RV was 88.7% (80.4%-100% between studies), and the overall adverse event rate was 13.2% (4.9%-19.2% between studies). For EUS-RV, the overall success rate was 82%-86.1%, and the overall adverse event rate was 13%-15.6%. Because interval ERCP has an acceptably high success rate and lower adverse event rate and does not require additional expertise, facilities, or other specialists, it can be considered the first choice for salvage therapy. EUS-RV can also be considered if local experts are available. For patients in urgent need of biliary drainage, PTE-RV should be considered.
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Affiliation(s)
- Yung-Kuan Tsou
- Department of Gastroenterology and Hepatology, Chang Gung Memorial Hospital, Taoyuan 333, Taiwan
- Department of Medicine, Chang Gung University, Taoyuan 333, Taiwan
| | - Kuang-Tse Pan
- Department of Medicine, Chang Gung University, Taoyuan 333, Taiwan
- Department of Medical Imaging and Intervention, Chang Gung Memorial Hospital, Taoyuan 333, Taiwan
| | - Mu Hsien Lee
- Department of Gastroenterology and Hepatology, Chang Gung Memorial Hospital, Taoyuan 333, Taiwan
- Department of Medicine, Chang Gung University, Taoyuan 333, Taiwan
| | - Cheng-Hui Lin
- Department of Gastroenterology and Hepatology, Chang Gung Memorial Hospital, Taoyuan 333, Taiwan
- Department of Medicine, Chang Gung University, Taoyuan 333, Taiwan
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Abstract
Pancreaticobiliary (PB) endotherapy continues to progress in the era of therapeutic endosonography. Endoscopic retrograde cholangiopancreatography (ERCP) remains the primary method for PB access in native and altered anatomy. In altered anatomy, PB access can be obtained via enteroscopy-assisted ERCP (e-ERCP) or laparoscopy-assisted ERCP; however, both approaches have significant limitations. Endoscopic ultrasound-guided biliary and pancreatic duct drainage (EUS-BPD) are increasingly becoming the preferred alternative when ERCP fails, with advantages over percutaneous drainage. EUS-BPD continues to evolve with better feasibility, safety and efficacy as dedicated procedural equipment continues to improve. In this article, we discuss the role of endoscopic ultrasound (EUS) when ERCP fails and their indications, technique, and outcomes.
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Matsubara S, Nakagawa K, Suda K, Otsuka T, Isayama H, Nakai Y, Oka M, Nagoshi S. A Proposed Algorithm for Endoscopic Ultrasound-Guided Rendezvous Technique in Failed Biliary Cannulation. J Clin Med 2020; 9:jcm9123879. [PMID: 33260305 PMCID: PMC7760883 DOI: 10.3390/jcm9123879] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Revised: 11/22/2020] [Accepted: 11/26/2020] [Indexed: 02/07/2023] Open
Abstract
Background: The selection of an approach route in endoscopic ultrasound-guided rendezvous (EUS-RV) for failed biliary cannulation is complicated. We proposed an algorithm for EUS-RV. Methods: We retrospectively evaluated consecutive EUS-RV cases between April 2017 and July 2020. Puncturing the distal extrahepatic bile duct (EHBD) from the duodenal second part (D2) (DEHBD/D2 route) was attempted first. If necessary, puncturing the proximal EHBD from the duodenal bulb (D1) (PEHBD/D1 route), puncturing the left intrahepatic bile duct (IHBD) from the stomach (LIHBD/S route), or puncturing the right IHBD from the D1 (RIHBD/D1 route) were attempted in this order. Results: A total of 16 patients were included. The DEHBD/D2 route was used in 10 (62.5%) patients. The PEHBD/D1 route was attempted in five (31.3%) patients, and the biliary puncture failed in one patient in whom the RIHBD/D1 route was used because of tumor invasion to the left hepatic lobe. The LIHBD/S route was applied in one (6.3%) patient. Successful biliary cannulation was achieved in all patients eventually. The time from the puncture to the guidewire placement in the DEHBD/D2 route (3.5 min) was shorter than that in other methods (14.0 min) (p = 0.014). Adverse events occurred in one (6.3%) patient with moderate pancreatitis. Conclusions: The proposed algorithm might be useful for the selection of an appropriate approach route in EUS-RV.
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Affiliation(s)
- Saburo Matsubara
- Saitama Medical Center, Department of Gastroenterology and Hepatology, Saitama Medical University, Saitama 350-8550, Japan; (K.N.); (K.S.); (T.O.); (M.O.); (S.N.)
- Correspondence: or ; Tel.: +81-49-228-3400 (ext. 7839); Fax: +81-49-226-5284
| | - Keito Nakagawa
- Saitama Medical Center, Department of Gastroenterology and Hepatology, Saitama Medical University, Saitama 350-8550, Japan; (K.N.); (K.S.); (T.O.); (M.O.); (S.N.)
| | - Kentaro Suda
- Saitama Medical Center, Department of Gastroenterology and Hepatology, Saitama Medical University, Saitama 350-8550, Japan; (K.N.); (K.S.); (T.O.); (M.O.); (S.N.)
| | - Takeshi Otsuka
- Saitama Medical Center, Department of Gastroenterology and Hepatology, Saitama Medical University, Saitama 350-8550, Japan; (K.N.); (K.S.); (T.O.); (M.O.); (S.N.)
| | - Hiroyuki Isayama
- Department of Gastroenterology, Graduate School of Medicine, Juntendo University, Tokyo 113-8421, Japan;
| | - Yousuke Nakai
- Department of Gastroenterology, Graduate School of Medicine, The University of Tokyo, Tokyo 113-8654, Japan;
| | - Masashi Oka
- Saitama Medical Center, Department of Gastroenterology and Hepatology, Saitama Medical University, Saitama 350-8550, Japan; (K.N.); (K.S.); (T.O.); (M.O.); (S.N.)
| | - Sumiko Nagoshi
- Saitama Medical Center, Department of Gastroenterology and Hepatology, Saitama Medical University, Saitama 350-8550, Japan; (K.N.); (K.S.); (T.O.); (M.O.); (S.N.)
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Kinoshita T, Ujiie H, Schwock J, Fujino K, McDonald C, Lee CY, Gregor A, Tyan CC, Houston S, Czarnecka-Kujwa K, Asamura H, Yasufuku K. Clinical evaluation of the utility of a flexible 19-gauge EBUS-TBNA needle. J Thorac Dis 2018; 10:2388-2396. [PMID: 29850144 DOI: 10.21037/jtd.2018.04.50] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Background Endobronchial ultrasound-guided transbronchial needle aspiration (EBUS-TBNA) is an established modality for the assessment of mediastinal and hilar adenopathy. To overcome the sampling limitations of standard 21- and 22-gauge EBUS-TBNA needles, a new flexible 19-gauge (Flex 19G) needle was developed. Methods We performed a retrospective analysis of patients who underwent EBUS-TBNA sampling with the Flex 19G needle. A 22G needle was always used first for cytology, followed by a Flex 19G needle, either an early version (Oct/2014-Sep/2015) or a final version needle (May/2016-Jan/2017), for tissue sampling. The success rate of obtaining samples, specimen quantity, and safety were evaluated and compared. Results All sampling procedures in 45 patients and 82 targets were performed without complication and the overall diagnostic yield from cytology was 100%. Furthermore, 28% of Flex 19G samples were sufficient for histopathological diagnosis. Yield improved with an increased number of passes and if the target was larger. Compared to the early version evaluated in 52 targets, the final version of the Flex 19G needle evaluated in 30 targets provided significantly larger volume samples and more frequent diagnostic cores. Tissue obtained with the Flex 19G needle retained cohesiveness to a larger degree and was of higher cellularity compared to cytological samples processed as cell blocks. Conclusions The Flex 19G is safe and provides larger volumetric and cohesive tissue samples that are appropriate for histopathological processing. The final version of the Flex 19G could be a good choice in selected cases where greater tissue acquisition is required.
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Affiliation(s)
- Tomonari Kinoshita
- Division of Thoracic Surgery, Toronto General Hospital, University of Toronto, Toronto, Ontario, Canada.,Division of General Thoracic Surgery, Department of Surgery, Keio University School of Medicine, Tokyo, Japan
| | - Hideki Ujiie
- Division of Thoracic Surgery, Toronto General Hospital, University of Toronto, Toronto, Ontario, Canada
| | - Joerg Schwock
- Department of Pathology, University Health Network, University of Toronto, Toronto, Ontario, Canada
| | - Kosuke Fujino
- Division of Thoracic Surgery, Toronto General Hospital, University of Toronto, Toronto, Ontario, Canada
| | - Christine McDonald
- Division of Thoracic Surgery, Toronto General Hospital, University of Toronto, Toronto, Ontario, Canada
| | - Chang Young Lee
- Division of Thoracic Surgery, Toronto General Hospital, University of Toronto, Toronto, Ontario, Canada
| | - Alexander Gregor
- Division of Thoracic Surgery, Toronto General Hospital, University of Toronto, Toronto, Ontario, Canada
| | - Chung Chun Tyan
- Division of Thoracic Surgery, Toronto General Hospital, University of Toronto, Toronto, Ontario, Canada
| | - Simon Houston
- Division of Thoracic Surgery, Toronto General Hospital, University of Toronto, Toronto, Ontario, Canada
| | - Kasia Czarnecka-Kujwa
- Division of Thoracic Surgery, Toronto General Hospital, University of Toronto, Toronto, Ontario, Canada.,Division of Respirology, University Health Network, University of Toronto, Toronto, Ontario, Canada
| | - Hisao Asamura
- Division of General Thoracic Surgery, Department of Surgery, Keio University School of Medicine, Tokyo, Japan
| | - Kazuhiro Yasufuku
- Division of Thoracic Surgery, Toronto General Hospital, University of Toronto, Toronto, Ontario, Canada
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