Self-Made Internal Traction Method For Endoscopic Submucosal Dissection of Early Gastric Cancer
June 2nd, 2026
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This protocol describes a self-made multiring thread method to provide controlled internal traction during gastric endoscopic submucosal dissection. The technique facilitates effective mucosal flap traction in desired directions and forces, enabling easy, safe, and cost-effective dissection.
Overview
This protocol describes a self-made multiring thread method to provide controlled internal traction during endoscopic submucosal dissection (ESD) for early gastric cancer. ESD is a minimally invasive treatment that enables en bloc resection; however, the procedure can be technically challenging when adequate visualization and access to the submucosal layer are limited. Conventional traction methods, such as the dental floss clip technique, may be hindered by interference with the endoscope and instability of clip attachment. To address these limitations, a multiring thread device was developed to enable stable and adjustable traction. The device allows precise control of traction direction and force without interfering with endoscope maneuverability. This protocol outlines the preparation and deployment of the multiring thread during the procedure. The method facilitates improved exposure of the submucosal layer, enhances procedural efficiency, and supports safe dissection. This approach provides a simple, cost-effective, and reproducible technique for improving outcomes in gastric ESD.
Key Study Components
Area of Science
- Gastroenterology
- Endoscopic Surgery
- Gastrointestinal Oncology
Background
- Endoscopic submucosal dissection (ESD) is used for en bloc resection of early gastric cancer.
- Adequate visualization and access to the submucosal layer are critical for successful ESD.
- Conventional traction methods like dental floss clips can interfere with endoscope movement and lack stability.
- There is a need for improved traction techniques that do not compromise endoscopic maneuverability.
Purpose of Study
- To develop a self-made multiring thread device for controlled internal traction during ESD.
- To enable stable and adjustable traction without interfering with endoscope function.
- To improve submucosal layer exposure and procedural efficiency in gastric ESD.
- To provide a cost-effective and reproducible traction method for clinical use.
Methods Used
- Fabrication of a multiring thread device using accessible materials.
- Preparation of the device prior to endoscopic procedure.
- Deployment of the thread during ESD to apply controlled traction.
- Adjustment of traction direction and force as needed during dissection.
- Monitoring of submucosal exposure and endoscopic maneuverability throughout the procedure.
Main Results
- The multiring thread device provides stable and adjustable traction during ESD.
- It does not interfere with endoscope maneuverability.
- Improved exposure of the submucosal layer is achieved.
- Procedural efficiency is enhanced and dissection is performed more safely.
- The method is simple, cost-effective, and reproducible in clinical practice.
Conclusions
- The self-made multiring thread method offers a reliable traction solution for gastric ESD.
- It overcomes limitations of conventional techniques like dental floss clips.
- The device improves visualization and access to the submucosal layer.
- It supports safe and efficient en bloc resection of early gastric cancer.
- This approach is suitable for widespread adoption due to its simplicity and low cost.
Frequently Asked Questions
What is the main advantage of the multiring thread method over conventional traction techniques?
The multiring thread method provides stable and adjustable traction without interfering with endoscope maneuverability, unlike conventional methods such as dental floss clips which can cause instability and obstruction.
How does the multiring thread device improve the ESD procedure?
It improves exposure of the submucosal layer, enhances procedural efficiency, and supports safe dissection by allowing precise control of traction direction and force.
Is the multiring thread device expensive or difficult to prepare?
No, the device is self-made, simple, cost-effective, and reproducible using accessible materials.
Can the traction be adjusted during the procedure?
Yes, the device allows for real-time adjustment of traction direction and force to meet procedural needs.
Does the device interfere with the endoscope during ESD?
No, the multiring thread method is designed to avoid interference with endoscope movement and maintains optimal maneuverability.
What type of lesions is this method particularly useful for?
This method is especially beneficial for early gastric cancer lesions where adequate visualization and access to the submucosal layer are limited.
Is the multiring thread method suitable for routine clinical use?
Yes, due to its simplicity, low cost, and reproducibility, it is well-suited for routine application in endoscopic submucosal dissection.
Executive Industry Relevance
This traction method addresses a key technical challenge in endoscopic submucosal dissection by improving visualization and access to the submucosal layer without compromising endoscope maneuverability. Its simple, cost-effective design supports reproducible application in early gastric cancer resection, offering a practical solution for enhancing procedural efficiency and safety in gastrointestinal oncology interventions.
Strategic Applications in Biopharma R&D
Early Discovery & Target Validation
- Scientific Value: Enables reliable tissue manipulation to support mechanistic studies of early neoplastic lesions in gastrointestinal models.
- Operational Value: Provides a reproducible traction system that reduces variability in dissection procedures across experimental replicates.
Screening & Assay Development
- Scientific Value: Facilitates consistent exposure of submucosal layers for biomarker analysis and histopathological evaluation in preclinical models.
- Operational Value: Supports standardized tissue preparation workflows, improving assay readiness and reducing procedural failure rates.
Translational & Preclinical Research
- Scientific Value: Maintains tissue integrity during dissection, supporting accurate downstream molecular and phenotypic analysis in disease-relevant systems.
- Operational Value: Enables scalable application across multiple models, promoting continuity from discovery through preclinical validation stages.
Pipeline & Workflow Integration
The method integrates into discovery workflows where precise tissue handling is required, particularly in gastrointestinal oncology models needing en bloc resection for downstream analysis.
- Discovery Biology: Supports hypothesis testing by enabling controlled access to submucosal layers for pathway clarification and target de-risking.
- Screening: Enhances assay reproducibility through standardized tissue preparation, improving reliability of compound or intervention readouts.
- Analytics: Generates high-quality tissue samples suitable for quantitative molecular, histological, or imaging-based measurements.
- Translational Research: Promotes continuity by preserving tissue architecture for biomarker alignment and preclinical efficacy assessment.
- Enterprise Reuse: Represents a low-cost, reusable traction solution applicable across multiple gastrointestinal models and experimental settings.
Operational & Enterprise Impact
- Scientific Value: Improves predictive confidence by reducing mechanical artifacts and enhancing tissue sample quality for downstream analysis.
- Operational Value: Delivers standardization, reproducibility, and scalability in tissue dissection protocols across research teams.
- Strategic Value: Supports better go/no-go decisions by minimizing procedural failure and increasing data reliability in early-stage validation.
- Portfolio Impact: Enables risk-adjusted prioritization through consistent, high-fidelity tissue preparation in gastrointestinal disease models.
Implementation Considerations
- Requires basic endoscopic training and familiarity with traction-assisted dissection techniques.
- Depends on standard endoscopic instruments and accessible materials such as thread and rings for device fabrication.
- Necessitates cross-team standardization to ensure consistent traction application and force control across users.
- Involves adaptation considerations for different tissue types and model systems beyond early gastric cancer.
- Includes practical limitations related to operator skill in thread deployment and real-time traction adjustment during procedures.
Biopharma FAQs
Why does controlled internal traction matter for target validation in gastrointestinal models?
Controlled internal traction improves visualization and access to submucosal layers, enabling more accurate dissection and reducing mechanical artifacts that could confound target identification and pathway analysis in early neoplastic lesions.
How does independent variable isolation fit the discovery pipeline when using traction-assisted dissection?
By stabilizing tissue position and minimizing scope interference, the method allows researchers to isolate the effects of specific interventions or genetic modifications on tissue response without confounding procedural variability.
What quantitative dependent variable measurements enable reliable assessment after traction-assisted dissection?
The method supports quantitative measurements such as resection completeness, histopathological margins, and molecular biomarker expression by preserving tissue integrity and improving sample quality for downstream analysis.
Why do replication requirements matter for cross-functional collaboration in traction-assisted workflows?
Reproducible traction application ensures consistent tissue preparation across teams and sites, reducing variability in experimental outcomes and supporting reliable data sharing in multicenter preclinical studies.
What statistical analysis capabilities are required before implementing traction-assisted dissection in preclinical studies?
Researchers should establish baseline variability in tissue handling and dissection outcomes to determine appropriate sample sizes and statistical power for detecting meaningful differences in target engagement or phenotypic responses.
