Lateral Protrusion for Independent Tissue Clamping Positioning
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Solution Overview
Problem
Current biological tissue closing devices face challenges in selecting an ideal sticking position due to limited degree of freedom in positioning the stick portion, leading to potential misplacement and complications during procedures like PFO closure, especially under shallow anesthesia and varying anatomical conditions.
Innovation Solution
The device allows independent movement of the stick portion and sandwich member relative to the catheter, enabling the stick portion to be protruded laterally and positioned arbitrarily, including directly under the overlapping region of the foramen ovale valve and atrial septum secundum, with expandable and contractible needle members for wider tissue contact and improved positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the stick portion is fixed at the distal tip of the catheter, then the device structure is simple, but the degree of freedom for selecting the sticking position is insufficient
Solution Approach 1:
The catheter system is divided into multiple independent movable components: the stick portion can move independently relative to the catheter body, and the sandwich member can also move independently. This segmentation allows each component to be positioned separately to achieve the ideal sticking position while maintaining relatively simple individual structures.
Solution Approach 2:
The stick portion is designed to be movable relative to the catheter rather than fixed, transforming the system from a static configuration to a dynamic one. This allows the stick portion to be protruded to the side direction and positioned arbitrarily according to anatomical conditions, solving the contradiction between structural simplicity and positioning flexibility.
2Adaptability or versatility
If the stick portion is protruded from the distal tip of the catheter, then the sticking position selection is limited to the extension line of the catheter axial line, but the device structure remains simple
Solution Approach 1:
The stick portion is designed to protrude not only in the axial direction but also to the side direction (radial dimension) of the catheter. This adds another dimension to the positioning capability, allowing the stick portion to reach positions that are not on the extension line of the catheter axial line, thereby improving adaptability to varying anatomical conditions.
3Reliability
If the foramen ovale valve is pulled to the foramen ovale using an apparatus, then the defect can be closed, but the apparatus size is restricted due to varying thicknesses and shapes of tissues
Solution Approach 1:
The sandwich member is designed to be movable relative to the catheter, allowing it to be protruded to sandwich the foramen ovale valve and atrial septum secundum. This dynamic positioning capability enables the apparatus to adapt to varying tissue thicknesses and shapes, maintaining reliable defect closure across different anatomical conditions without requiring multiple fixed-size apparatuses.
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
This design enhances the procedure's smoothness, safety, and certainty by allowing precise and ideal positioning of the stick portion, reducing the risk of misplacement and improving the fusion region of biological tissues, thus facilitating more effective closure of defects like PFO.
Implementation Method 1
a stick portion (2) to be stuck into the foramen ovale valve (M2)
Implementation Method 2
clamping means (K) for sandwiching the foramen ovale valve (M2) and the atrial septum secundum (M1)
Implementation Method 3
supply means (20) for supplying electric energy by which the biological tissue (M) sandwiched by the clamping means (K) is welded or fused
Data Source
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AI summary
There is provided a biological tissue closing device in which by forming the stick portion and the sandwich member movable independently with respect to the catheter, degree of freedom for selecting the sticking position is heightened, it becomes possible to select a more ideal sticking position, and improvement in smoothness, safety and also certainty of the procedure is attempted. There is disclosed a device making a stick portion 2 of clamping means K and a sandwich member 1 movable respectively independently with respect to the catheter 30 and in particular, the device is characterized in that aforesaid stick portion is protruded in the side direction of the catheter 30.