Snare Device with Pivoting Shape-Memory Loops for Non-Probeable Object Capture
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional snare devices struggle to capture objects with non-probeable ends, as they require accessible ends for the snare to be slipped over, and when used with non-probeable ends, they have a large diameter, leading to complications like thrombosis and secondary bleeding due to increased puncture site size.
Innovation Solution
A snare device with a flexible, elastic shape-memory material sling that is deformed to pivot through a first loop upon exiting a hollow element, allowing the second loop to return and encompass objects, even if ends cannot be probed, with a design that includes a triangular first loop and bulge for secure capture and retrieval through a minimally invasive procedure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional snare device is used to capture objects with non-probeable ends, then the device must have a large diameter to accommodate additional locking mechanisms, but this leads to increased puncture site size and complications like thrombosis and secondary bleeding
Solution Approach 1:
The snare is divided into multiple loops (first loop and second loop) that can function independently or together. The second loop is specifically designed to pivot through the first loop to capture objects with non-probeable ends, while the first loop handles conventional probeable objects, eliminating the need for a single large-diameter device.
Solution Approach 2:
The second loop is designed with dynamic pivoting capability that allows it to rotate through the first loop upon exiting the catheter. This dynamic movement enables the snare to adapt its configuration based on the object being captured, providing versatility without requiring a larger device diameter.
2Ease of operation
If a conventional snare device is used for objects with probeable ends, then the procedure is simple and effective, but it fails when objects have non-probeable ends requiring special instruments
Solution Approach 1:
The snare device incorporates two different loop configurations that enable it to perform multiple functions: the first loop handles conventional probeable objects through standard snaring, while the second loop with pivoting capability captures objects with non-probeable ends, making the device universal for both application types.
Solution Approach 2:
The second loop is pre-configured in a deformed state during insertion that allows it to pivot through the first loop upon exiting the catheter. This preliminary deformation prepares the loop for its special capture function without requiring additional manipulation steps during the procedure.
3Adaptability or versatility
If special instruments with larger caliber are used to capture objects with non-probeable ends, then capture capability is improved, but complications at the puncture site increase
Solution Approach 1:
The snare is divided into multiple loops (first loop and second loop) that can function independently or together. The second loop is specifically designed to pivot through the first loop to capture objects with non-probeable ends, while the first loop handles conventional probeable objects, eliminating the need for a single large-diameter device.
Solution Approach 2:
The second loop is designed with dynamic pivoting capability that allows it to rotate through the first loop upon exiting the catheter. This dynamic movement enables the snare to adapt its configuration based on the object being captured, providing versatility without requiring a larger device diameter.
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
Enables the capture and retrieval of objects with non-probeable ends using a smaller diameter hollow element, reducing the risk of complications like thrombosis and secondary bleeding, while maintaining the ability to capture probeable ends, all through a minimally invasive procedure.
Implementation Method 1
the sling has an imprinted original shape to which the sling returns when pushed out of the hollow member by the material stresses induced when it is pulled in
Data Source
Figure 1~3
AI summary
The invention relates to a snare device for catching an object, in particular for catching objects or foreign bodies in a human or animal body, said snare device comprising a hollow element, in particular a catheter, and a snare made of a flexible elastic shape-memory material, wherein the snare is movable relative to the hollow element and can be pulled into the hollow element and pushed out of it, and wherein the snare has an impressed original shape to which said snare returns, when pushed out from the hollow element, as a result of the material stresses caused when it was pulled in, wherein the original shape of the snare has a twisted area, as a result of which a first loop and a second loop are formed, wherein the first loop is arranged substantially parallel to the longitudinal axis of the hollow element, and the second loop is at an angle with respect to the longitudinal axis of the hollow element, and which is characterized in that the snare thus deformed is introduced into the hollow element and is arranged inside the hollow element, in that the second loop is pivoted relative to the first loop and through the first loop, such that the second loop, on emerging from the hollow element, pivots back through the first loop as a result of the load being removed from the shape-memory material, thereby allowing the object to be enclosed. HF/BS/jd/hd