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CC BY-NC-ND 4.0 · Endosc Int Open 2024; 12(09): E1043-E1055
DOI: 10.1055/a-2374-8476
Original article

Validation and efficacy of the Varix Trainer model as a Training device for esophagogastroduodenoscopy

Sarunporn Kamolvisit
1   Division of Gastroenterology and Hepatology, Department of Medicine, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
,
Julajak Limsrivilai
2   Division of Gastroenterology, Department of Medicine, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand
,
Parit Mekaroonkamol
3   Division of Gastroenterology, Faculty of Medicine, Chulalongkorn University and King Chulalongkorn Memorial Hospital, Bangkok, Thailand
,
Tanyaporn Chantarojanasiri 
4   Division of Gastroenterology, Department of Internal Medicine, Rajavithi Hospital, Rangsit University, Bangkok, Thailand
,
Nalerdon Chalermsuksant
5   Division of Gastroenterology, Department of Medicine, Faculty of Medicine, Vajira Hospital, Navamindradhiraj University, Bangkok, Thailand (Ringgold ID: RIN292577)
,
Kamin Harinwan
6   Division of Gastroenterology and Hepatology, Department of Medicine, Pramongkutklao Hospital and College of Medicine, Royal Thai Army, Bangkok, Thailand
,
Chitchai Rattananukrom
7   Division of Gastroenterology and Hepatology, Department of Medicine, Faculty of Medicine, Srinagarind Hospital, Khon Kaen University, Khon Kaen, Thailand (Ringgold ID: RIN37690)
,
Thanawin Wong
8   Division of Gastroenterology and Hepatology, Department of Internal Medicine, Faculty of Medicine, Prince of Songkla University, Songkla, Thailand
,
Rapat Pittayanon 
3   Division of Gastroenterology, Faculty of Medicine, Chulalongkorn University and King Chulalongkorn Memorial Hospital, Bangkok, Thailand
,
Onuma Sattayalertyanyong
2   Division of Gastroenterology, Department of Medicine, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand
,
Phalat Sathirawich
2   Division of Gastroenterology, Department of Medicine, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand
,
Uayporn Kaosombatwattana
2   Division of Gastroenterology, Department of Medicine, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand
,
Akharawit Pulsombat
1   Division of Gastroenterology and Hepatology, Department of Medicine, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
,
Patarapong Kamalaporn
1   Division of Gastroenterology and Hepatology, Department of Medicine, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
,
Jaksin Sottisuporn
9   NKC Institute of Gastroenterology and Hepatology, Songklanagarind Hospital, Faculty of Medicine, Prince Songkla University, Songkla, Thailand
,
Nonthalee Pausawasdi
2   Division of Gastroenterology, Department of Medicine, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand
,
Sasivimol Rattanasiri
10   Department of Clinical Epidemiology and Biostatistics, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
,
Taya Kitiyakara 
1   Division of Gastroenterology and Hepatology, Department of Medicine, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
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Abstract

Background and study aims The Varix Trainer model 1 (VTM1) was created for trainees to safely practice basic endoscope manipulation skills. The VTM1 was tested to see if it could distinguish levels of endoscope manipulation skills (construct validity) and whether training with it could improve these skills faster (content validity).

Patients and methods We enrolled 23 novice endoscopists, 18 second-year trainees, and 13 expert endoscopists. They were asked to point with the endoscope tip to 20 numbers in the model as quickly as possible using torque, single-hand small/large wheel manipulation (SHSW), and retroflexion techniques. Their mean times (t20) were compared to determine if the model could distinguish different levels of expertise. Subsequently, 14 novices trained for eight short sessions, and the pre-training and post-training t20 were compared. Nine novice endoscopists received no training and were retested after 4 to 6 weeks (controls).

Results Experts had faster t20 than second-year trainees, who were faster than novices, for all three techniques (P < 0.001). After eight sessions, the mean t20 for novices improved from 112 to 66 seconds for torque, 144 to 72 seconds for SHSW, and 108 to 63 seconds for retroflexion, (all P < 0.001). Their t20 were equivalent to second-year trainees. Improvement in t20 was also seen with the control group, but total reduction was less than for the training group.

Conclusions The VTM1 distinguished varying levels of expertise for all techniques, suggesting that it is a valid tool for assessing endoscope manipulation skill. A short curriculum improved novices’ manipulation skills faster than traditional practice.

Keywords

Quality and logistical aspects - Training - Performance and complications - Endoscopy Upper GI Tract


Publication History

Received: 25 December 2023

Accepted after revision: 01 July 2024

Article published online:
12 September 2024

© 2024. The Author(s). This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial-License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/).

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