Expandable Instrument Accessory for Stable ERCP Cannulation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing medical devices face challenges in effectively maneuvering through the digestive tract due to peristaltic movements and tightly contracted musculature, leading to compromised effectiveness and efficiency in procedures like ERCP, particularly in cannulating the common bile duct.
Innovation Solution
An instrument accessory device with an expandable member and constrainment element, which can be expanded within the body lumen to stabilize the medical device, maintaining frictional contact and preventing movement, allowing precise access to body cavities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the medical device is maneuvered through the digestive tract without stabilization, then the device can be inserted, but the peristaltic movements and contracted musculature cause positioning instability and procedure failure
Solution Approach 1:
The device employs an expandable member that transitions from a compressed low-profile state during insertion to an expanded stabilization state during the procedure. This dynamic transformation allows the device to adapt its mechanical properties in response to procedural needs, providing stability when required while maintaining ease of insertion when the expandable member is in a compressed state
Solution Approach 2:
The expandable member is contained within a constrainment element during insertion, creating a nested configuration. The constrainment element maintains the expandable member in a compressed state, allowing the device to pass through the digestive tract with minimal profile. Once positioned, the constrainment element is removed or released, allowing the expandable member to expand and provide stabilization
2Reliability
If medication is administered to suppress peristaltic movements, then positioning stability may improve, but the procedure time and patient treatment complexity increase
Solution Approach 1:
The expandable member acts as a mechanical intermediary that provides physical stabilization against peristaltic movements. Instead of relying on pharmacological intervention to suppress muscle contractions, the device creates a stable mechanical environment that resists the effects of peristalsis, allowing the procedure to proceed without medication-induced delays
3Reliability
If high precision maneuvering is used to navigate the papilla opening, then cannulation success may improve, but the procedure becomes more difficult and time-consuming
Solution Approach 1:
The expandable member is deployed and stabilized before the cannulation attempt. This preliminary stabilization action creates a fixed reference frame and stable platform from which precise maneuvers can be performed. The papilla opening can be accessed more easily because the device is already stabilized in position, eliminating the need for continuous adjustment during the critical cannulation phase
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 and efficiency of procedures by stabilizing the medical device within the body, enabling effective cannulation and examination of complex anatomical structures.
Implementation Method 1
maintaining frictional contact and preventing movement
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 endoscopic procedures, such as Endoscopic Retrograde Cholangiopancreatography (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 outer surface may comprise an expandable material. The device may comprise a constrainment element disposed about the outer surface of the expandable member, the constrainment element comprising a proximal end, a distal end, an inner surface, and an outer surface.