Evaluation of the Feasibility and Efficacy of Forward-Viewing Endoscopic Ultrasound

• Published in: Gut and liver Vol. 9; no. 5; pp. 679 - 684
• Main Authors: Lee, Seohyun, Seo, Dong Wan, Choi, Jun-Ho, Park, Do Hyun, Lee, Sang Soo, Lee, Sung Koo, Kim, Myung-Hwan
• Format: Journal Article
• Language: English
• Published: Korea (South) Gut and Liver 01.09.2015; Gastroenterology Council for Gut and Liver; 거트앤리버 소화기연관학회협의회
• Subjects: Aged; Biliary Tract Neoplasms - diagnostic imaging; Cross-Over Studies; endoscopic ultrasound guided intervention; Endosonography - instrumentation; Endosonography - methods; Equipment Design; Feasibility Studies; Female; forward-viewing endoscopic ultrasound; Gastrointestinal Neoplasms - diagnostic imaging; Humans; Image Enhancement - instrumentation; Male; Middle Aged; oblique-viewing endoscopic ultrasound; Original; Pancreatic Neoplasms - diagnostic imaging; Prospective Studies; 내과학; Endoscopic ultrasound guided intervention; Oblique-viewing endoscopic ultrasound; Forward-viewing endoscopic ultrasound
• ISSN: 1976-2283; 2005-1212
• DOI: 10.5009/gnl14394

We aimed to evaluate the feasibility and efficacy of a forward-viewing linear endoscopic ultrasound (FV-EUS) in diagnostic EUS procedures compared to standard oblique-viewing EUS (OV-EUS). This study was a prospective, randomized study that permitted cross-over. Fifty-one patients with subepithelial pancreatobiliary and upper gastrointestinal lesions underwent FV-EUS and OV-EUS sequentially, in random order. The EUS visualization was performed by a novice endosonographer, and the image quality of specific lesions was scored by an expert endosonographer. If fine-needle aspiration (FNA) was indicated, it was performed using both echoendoscopes by an expert endosonographer. Both of the EUS procedures had similar visualization times and image quality. In general, the visualization time was inversely related to the diameter of the specific lesions. In subepithelial lesions of the stomach and duodenum, the visualization time (98.8±62.2 seconds vs 139.0±66.6 seconds, p=0.008) and image quality (4.1±1.3 vs 3.3±1.7, p=0.02) of FV-EUS were significantly superior to OV-EUS. FV-EUS-guided FNA of pancreatic masses was successful in seven patients (87.5%). FV-EUS may increase the ease of access to gastrointestinal subepithelial lesions compared to conventional OV-EUS. The performance of FV-EUS for evaluating pancreatobiliary diseases and performing interventions was comparable to conventional OV-EUS.