Coated Stent Inward-Tilting Wave Body for Branch Vessel Protection
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Solution Overview
Problem
Traditional covered stents often stimulate and compress branch vessels, leading to potential puncture and increased difficulty in mounting and releasing, due to their design.
Innovation Solution
A covered stent design featuring an inward-tilting wave body with a radial distance that increases from the wave crest to the wave trough, forming an avoidance space to adapt to arterial vessel curvature, reducing stimulation and compression on branch vessels and facilitating easier deployment and retrieval.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a traditional covered stent uses a straight bare section, then the stent can be simply structured, but it stimulates and compresses branch vessels, potentially causing puncture and dissection
Solution Approach 1:
The bare section is designed with an inward-tilting wave body structure featuring wave crests, wave troughs, and wave rods that create a curved, non-linear configuration. This curved structure adapts to the natural curvature of arterial vessels and branch vessels, preventing direct contact and compression of the branch vessels while maintaining stent functionality.
2Ease of operation
If a traditional covered stent uses a straight bare section, then the structure remains simple, but mounting and releasing the stent into the sheath becomes difficult
Solution Approach 1:
The wave body structure of the bare section provides dynamic flexibility, allowing the stent to compress and expand during mounting and releasing operations. The wave crests and troughs enable the stent to flex within the sheath during delivery and then expand to its functional shape upon deployment, facilitating easier mounting and releasing while maintaining structural integrity.
Data Source
AI summary
A coated stent (100,200,300,400), comprises a coated unit (110,210,310,410), and an exposed unit (120,220,320,420) which is a ring-shaped structure and which is provided on the periphery (113,213,313) of an end portion (112,212,312) of the coated unit (110,210,310,410); the exposed unit (120,220,320,420) comprises an inward-tilting wave body (122,222,322,422), the inward-tilting wave body (122,222,322,422) comprising at least a first wave crest (122a,222a,322a) and a first wave rod (122c) connected to the first wave crest (122a,222a,322a); the position of the first wave crest (122a.222a,322a) is farther away from the coated unit (110,210,310,410) than other positions on the inward-tilting wave body (122,222,322,422); the first wave rod (122c) is planar, and from the first wave crest (122a,222a,322a) to an end of the exposed unit (120,220,320,420) near the coated unit (110,210,310,410), the radial distance from the inward-tilting wave body (122,222,322,422) to the central axis (102,202,302,402) of the coated unit (110,210,310,410) gradually increases. When the coated stent (100,200,300,400) is implanted into an arterial vessel (10), the inward-tilting wave body (122,222,322,422) forms a certain avoidance space due to the tilt to adapt to the curvature of a large curved side (11) of the arterial vessel (10), and prevents the inward-tilting wave body (122,222,322,422) from directly piercing a branch vessel (20).