Suture Cinching Assembly for Remote-Site Securement and Cutting
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Solution Overview
Problem
Existing medical devices for securing and terminating sutures lack efficient and reliable methods for cinching and cutting sutures, particularly in challenging remote sites within the body, such as the GI tract and heart, where access is difficult.
Innovation Solution
A medical device comprising an elongated shaft, connection sleeve, cinch sleeve, and cinch member, with a longitudinally movable inner shaft, allows for the securement and cutting of sutures through a series of configurations, enabling the cinch to be applied and detached from the suture, facilitating secure suture termination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing medical devices are used for securing and terminating sutures, then basic suture termination can be achieved, but the devices lack efficient and reliable methods for cinching and cutting sutures in challenging remote sites
Solution Approach 1:
The device employs a nested configuration where the cinch member is received within the cinch sleeve, which is itself received within the connection sleeve, all along the inner shaft. This nested arrangement allows multiple functions (cinching, cutting, securing) to be integrated in a compact form factor that can be delivered through remote access catheters while maintaining reliability of suture termination in challenging body sites
2Reliability
If a complex multi-component device is used to achieve reliable suture cinching and cutting, then suture termination reliability improves, but device complexity increases
Solution Approach 1:
The invention merges multiple functions into a single integrated device structure. The cinch member, cinch sleeve, connection sleeve, and cutting element are all combined along a single inner shaft, allowing suture cinching, securing, and cutting to be performed by one device rather than requiring multiple separate instruments, thereby improving reliability without proportionally increasing complexity
Solution Approach 2:
The device is designed with multi-functionality to perform cinching, securing, and cutting of sutures within a single integrated system. The inner shaft serves as a common structural element that supports all functional components, allowing the device to handle multiple suture termination tasks without requiring separate specialized instruments for each function
3Strength
If the cinch is securely applied to the suture, then suture integrity is maintained, but detachment and removal become more difficult
Solution Approach 1:
The connection between the cinch sleeve and connection sleeve is designed to be dynamic rather than permanent. The cinch sleeve can be reversibly engaged with the connection sleeve via the connectors, allowing the system to transition between a secure locked state (for maintaining suture integrity during the procedure) and a detachable state (for easy removal after use)
Data Source
AI summary
Medical devices for applying a cinch to one or more suture and cutting the suture, and methods for making and using such devices are disclosed. An example medical device may include an elongated shaft, a connection sleeve, a cinch sleeve coupled to the connection sleeve, and a cinch member. An elongated inner shaft may extend through and be longitudinally movable within the elongated shaft, connection sleeve, cinch sleeve, and cinch member.