Expandable Endoscope Accessory for Stable ERCP Cannulation
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Solution Overview
Problem
Endoscopic procedures, such as ERCP, face challenges in cannulating the bile duct due to difficulties in positioning and stabilizing the endoscope within the duodenum, exacerbated by peristaltic movements and the tightly contracted musculature of the duodenal papilla, leading to compromised effectiveness and efficiency.
Innovation Solution
An instrument accessory device with an expandable member that can be expanded within the body lumen to stabilize the endoscope, featuring an inner and outer layer with a frictional contact mechanism and an aperture for fluid communication, allowing the endoscope to maintain its position and facilitate precise procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the endoscope is maneuvered through the tightly contracted musculature of the duodenal papilla, then cannulation of the bile duct can be achieved, but the procedure requires high levels of precision and is difficult to perform
Solution Approach 1:
The expandable member acts as an intermediary device that is deployed around the endoscope within the duodenum. When expanded, it provides a stable platform that mediates between the moving endoscope and the contracting duodenal muscles, allowing precise manipulation at the papilla while the expandable member absorbs the effects of peristaltic movements.
Solution Approach 2:
The expandable member is deployed and expanded before the critical cannulation maneuver is attempted. This preliminary action stabilizes the endoscope position and creates a fixed reference frame, allowing the operator to perform the precise papilla engagement and cannulation without the destabilizing effect of duodenal movements.
2Stability of the object's composition
If the endoscope is stabilized against peristaltic movements in the duodenum, then positioning precision is improved, but additional devices and procedures are required
Solution Approach 1:
The expandable member is integrated with the endoscope to form a combined system. The expandable member includes an instrument lumen that receives the endoscope, and when expanded, it simultaneously provides stabilization and maintains the instrument pathway, merging the functions of stabilization and instrument support into a single device.
Solution Approach 2:
The expandable member is constructed with flexible materials including an inner layer and an outer layer that can be inflated. This flexible shell structure allows the device to conform to the duodenal lumen while providing rigid stabilization when expanded, achieving stability without requiring complex rigid frameworks.
3Measurement precision
If the expandable member is expanded to stabilize the endoscope, then positioning precision is improved, but the device structure becomes more complex
Solution Approach 1:
The expandable member is segmented into an inner layer and an outer layer, with the inner layer providing structural support and the outer layer providing compliance. This segmentation allows each layer to be optimized for its specific function while keeping the overall structure relatively simple and manageable.
Solution Approach 2:
The expandable member transitions from a collapsed low-profile state during insertion to an expanded stabilization state during the procedure. This dynamic transformation allows the device to achieve high positioning accuracy when needed while maintaining low complexity and small size during delivery and storage.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances the precision, accuracy, and ease of endoscopic procedures by stabilizing the endoscope within the body lumen, enabling effective cannulation of the bile duct and improving the success rate of ERCP.
Implementation Method 1
The inner surface may comprise a material configured to maintain frictional contact with an instrument
Implementation Method 2
The inner layer and the outer layer may define inner and outer walls of a chamber that may be pressurized
Data Source
AI summary
The present disclosure, in its various aspects, is directed to instrument accessory devices, implementation methods, and related delivery systems. Embodiments according to the present disclosure, including as described herein, may increase the effectiveness and efficiency of endoscopy procedures, such as ERCP. In one example, an embodiment includes an instrument accessory device with an expandable member, the device configured to receive an instrument through an instrument lumen, wherein the expandable member comprises an aperture on the inner surface and outer surface, and the outer surface is in fluid communication with the inner surface.