Staggered Left Atrial Appendage Occluder Connection
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Solution Overview
Problem
Current left atrial appendage occluders suffer from high residual shunt complications due to ineffective attachment of the sealing portion to the anchoring portion, leading to incomplete occlusion and increased thrombosis risk, primarily caused by the axial elongation of the occluder and inadequate connection between the sealing and anchoring portions.
Innovation Solution
The left atrial appendage occluder features a staggered connection manner between the sealing and anchoring portions, with converging connection parts that extend toward each other without spatial interference, ensuring a reduced axial distance and improved attachment, thereby preventing axial elongation and enhancing the sealing effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sealing portion and anchoring portion are connected with sufficient pre-tightening force, then the sealing effect is improved, but the connection parts may produce spatial interference and prevent close attachment
Solution Approach 1:
The patent transforms the connection from a linear axial arrangement to a staggered three-dimensional configuration. The first connection part extends along the axial direction while the second connection part extends along the radial direction, creating spatial separation that eliminates interference while maintaining pre-tightening force for effective sealing.
2Device complexity
If the connection parts are arranged axially aligned, then the structure is simple, but the sealing portion cannot be closely attached to the orifice due to axial elongation
Solution Approach 1:
The patent employs asymmetric arrangement of connection parts where the first connection part (axial) and second connection part (radial) are positioned at different spatial locations and orientations. This asymmetric staggered configuration prevents axial elongation and enables precise attachment of the sealing portion to the orifice.
3Reliability
If the axial distance between sealing portion and anchoring portion is reduced, then the sealing effect is improved, but the connection parts interfere with each other spatially
Solution Approach 1:
The patent reduces axial distance by moving the second connection part from the axial dimension to the radial dimension. This dimensional transition allows the connection parts to be closely positioned axially while maintaining spatial separation radially, eliminating interference and improving sealing effect.
Data Source
AI summary
A left atrial appendage occluder with advanced connection manner and a manufacturing method thereof are provided. The left atrial appendage occluder includes a sealing portion and an anchoring portion. Each of the sealing portion and the anchoring portion is provided with a connection part formed by converging a corresponding shape of the sealing portion or the anchoring portion respectively. The connection parts of the sealing portion and the anchoring portion extend toward each other to be fixed and misaligned with each other.