Laterally Extendable Suture Positioning Support for Vascular Closure
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Solution Overview
Problem
Existing closure devices for suturing punctures in hollow anatomical structures, such as blood vessels, face challenges in efficiently and effectively securing sutures within the body.
Innovation Solution
The closure device comprises one or more sutures, ferrules coupled to the sutures, and an elongate support with a laterally extendable suture-positioning support. This configuration allows for the directed placement of ferrules into a receptacle, facilitating the securement of sutures within the anatomical structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a closure device uses a shaft and needles to draw suture through the blood vessel wall, then the suture can be secured outside the blood vessel to provide closure, but the device complexity increases and the procedure becomes more invasive
Solution Approach 1:
The closure device is divided into separate functional modules: a shaft for insertion, needles for suture delivery, and a suture positioning member for precise placement. This segmentation allows each component to be optimized independently while simplifying the overall device architecture and reducing invasiveness.
Solution Approach 2:
A suture positioning member is introduced as an intermediary component between the needle and the suture. This mediator guides and positions the suture precisely at the target location, improving closure effectiveness while simplifying the operation of the complex needle-and-suture assembly.
2Manufacturing precision
If the suture positioning member is made laterally extendable from the distal end of the shaft, then the precision of suture placement is improved, but the device complexity increases
Solution Approach 1:
The suture positioning member is designed to be dynamically extendable from the distal end of the shaft. It can be positioned laterally to achieve precise suture placement and then retracted for removal. This dynamic capability provides surgical precision without requiring a permanently complex device structure.
Solution Approach 2:
The suture positioning member is nested within or coupled to the shaft, allowing it to be stored within the shaft's structure when not in use. This nesting approach enables precise positioning functionality while maintaining a simple, compact device architecture during storage and insertion.
3Ease of operation
If the suture positioning support is laterally extendable from the distal portion of the shaft, then the ability to direct ferrules into the receptacle is improved, but the device complexity increases
Solution Approach 1:
The suture positioning support is designed as a dynamically extendable structure that can be deployed laterally from the shaft to create the ferrule receptacle. This dynamic deployment simplifies the operation of directing ferrules into the receptacle while maintaining a simple, compact device structure when retracted.
Solution Approach 2:
The suture positioning support is extended in advance to create the ferrule receptacle before the ferrule is introduced. This preliminary positioning action guides the ferrule placement process, making it easier to direct the ferrule into the correct location without requiring a complex, permanently structured receptacle.
Data Source
AI summary
A closure device (320) is provided for suturing a puncture. The closure device (320) includes a suture (322, 822), an elongate support (328), a suture-positioning support (330), and an elongate dilator (344). The suture-positioning support (330) is coupled to a distal end portion (332) of the elongate support (328), laterally extendable with respect to the distal end portion (332) of the elongate support (328), and configured to removably receive the suture (322, 822). The dilator (344) is configured to be inserted through the puncture, and has a proximal end (348) that is coupled to the distal end portion (332) of the elongate support (328). The closure device (320) is configured to allow movement of the distal end portion (332) of the elongate support (328) with respect to the proximal end (348) of the dilator (344) with at least two degrees of freedom. Other embodiments are also described.