Helical Coil and Loop Mechanism for Tissue Lifting
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Solution Overview
Problem
Conventional medical devices for tissue resection in gastrointestinal and esophageal cancer procedures face limitations in lifting force, leading to increased procedure time and patient injury due to the limited traction force available during endoscopic mucosal resection and submucosal dissection.
Innovation Solution
A medical system comprising an insertion device with a helical coil and loop mechanism that allows for axial and rotational movement, enabling secure coupling to tissue walls and enhanced lifting force, facilitating effective tissue resection and removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If conventional devices are used for tissue resection, then the procedure can be performed, but the lifting force is limited causing increased procedure time and patient injury
Solution Approach 1:
The lifting mechanism is divided into multiple components: a helical coil for anchoring to the tissue wall, a loop for engaging the tissue, and a cutting device. This segmentation allows each component to perform its specific function optimally, with the helical coil providing strong anchoring force and the loop providing controlled lifting force, thereby resolving the contradiction between sufficient lifting force and procedure time.
Solution Approach 2:
The helical coil is designed to be rotatable and axially movable relative to the sheath, allowing dynamic adjustment of the anchoring strength. The loop can be tensioned and released dynamically during the procedure. This dynamic capability enables the device to adapt to different tissue conditions and provide optimal lifting force when needed, reducing procedure time while maintaining safety.
2Force
If conventional devices are used for tissue resection, then the procedure can be performed, but the lifting force is limited causing increased patient injury
Solution Approach 1:
The helical coil acts as an intermediary between the cutting device and the tissue wall. It provides a secure anchoring point that distributes forces more evenly across the tissue wall, preventing localized stress concentration that could cause injury. The loop serves as another intermediary that controls the lifting force application, thereby reducing patient injury while maintaining sufficient traction force for the procedure.
Solution Approach 2:
The device allows changing the parameters of force application through rotational movement of the helical coil and tensioning of the loop. This enables precise control over the magnitude and distribution of forces applied to the tissue, reducing the risk of patient injury while ensuring sufficient lifting force is available when needed for safe procedure completion.
3Productivity
If conventional devices are used, then tissue can be removed, but the lifting force is insufficient leading to procedural complications
Solution Approach 1:
The system segments the lifting and cutting functions into separate components (helical coil for anchoring, loop for lifting, cutting device for resection). This segmentation allows each component to be optimized for its specific function, improving overall productivity while maintaining reliability, as each component can be controlled independently to ensure safe operation.
Solution Approach 2:
The dynamic capabilities of the helical coil (rotation and axial movement) and the loop (tensioning and releasing) allow the system to adapt to varying tissue conditions during the procedure. This dynamic adjustment improves both productivity by enabling efficient tissue resection and reliability by allowing real-time response to procedural challenges, thereby reducing complications.
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
The system improves tissue resection efficiency by providing greater traction force, reducing procedure time and minimizing patient injury, while allowing for precise control and secure anchoring of the helical coil to tissue walls.
Implementation Method 1
a helical coil axially and rotatably movable relative to the sheath
Implementation Method 2
A second portion of the loop may extend radially away from the sheath... configured to couple the second portion of the loop to a portion of a treatment site
Data Source
AI summary
A medical system includes an insertion device having a working channel, a first medical device, and a second medical device. The first medical device includes a handle, a sheath extending from the handle and defining a lumen, a helical coil, and a loop. The helical coil is axially and rotatably movable relative to the sheath. A first portion of the loop is coupled to the sheath and a second portion of the loop extends radially away from the sheath. The second medical device is configured to be disposed within the working channel of the insertion device. The second medical device is configured to receive the second portion of the loop. The second medical device is configured to couple the second portion of the loop to a portion of a treatment site.