Incremental Clip Closure via Segmented Tether Locking
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Solution Overview
Problem
Conventional hemostatic devices are often insufficient in applying permanent constrictive forces for blood vessel closure, and many clips lack incremental closure mechanisms, making it difficult to securely lock arms in various positions for effective hemostasis.
Innovation Solution
A clip system with first and second arms that can be incrementally closed using a locking pin and tether segments, allowing for incremental retraction and secure locking in multiple positions, facilitating progressive closure and hemostasis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional hemostatic devices are used, then the procedure is simple, but the constrictive force is insufficient to cause permanent hemostasis
Solution Approach 1:
The tether is divided into multiple segments that can be independently manipulated and locked at different positions. This segmentation allows progressive closure of the clip arms while maintaining a relatively simple overall device structure, resolving the contradiction between reliability and complexity.
Solution Approach 2:
The clip mechanism transitions from a static conventional design to a dynamic system where the tether segments can be incrementally retracted and locked. This dynamic capability enables progressive application of constrictive force, improving hemostasis effectiveness without requiring excessive structural complexity.
2Ease of operation
If a cannula is used to move clip arms between open and closed states, then the mechanism is simple, but incremental closure is not possible
Solution Approach 1:
The tether is segmented into multiple sections with locking mechanisms at different positions. This allows the operator to retract the tether incrementally and lock it at various intermediate positions, enabling progressive closure of the clip arms while maintaining ease of operation.
Solution Approach 2:
The segmented tether acts as an intermediary mechanism between the simple cannula and the clip arms. It translates the retraction motion into incremental closure steps, providing intermediate locking positions without requiring complex mechanical linkages.
3Adaptability or versatility
If the clip arms are locked in fixed positions, then the device is simple, but adaptive closure to different tissue types is difficult
Solution Approach 1:
The tether is divided into multiple segments with locking mechanisms at different positions along its length. This segmentation provides multiple predetermined closure positions that can accommodate different tissue types and vessel sizes, achieving adaptability without requiring complex real-time adjustment mechanisms.
Data Source
AI summary
The present embodiments provide systems and methods for deploying at least one clip during a medical procedure. In one embodiment, the system (10) comprises a clip (20) having first (30) and second (40) arms, wherein distal regions (34,44) of the first and second arms tend to be spaced apart from each other when the clip is in an open state, and wherein the distal regions of the first and second arms are adjacent to each other when the clip is in a closed state. A locking pin (70) is coupled to the clip and disposed for incremental movement relative to the clip. Further, a tether (60) is coupled to the locking pin, wherein a first tether segment (64) is secured to the distal region of the second arm, and a second tether segment (63) is secured to the distal region of the first arm. In use, proximal retraction of the locking pin causes a proximal retraction of the first and second tether segments to move the clip between the open and closed states. Incremental retraction of the locking pin incrementally advances the clip between the open and closed states.