Occlusion Clamp Deployment Device with Repositionable Frame
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Solution Overview
Problem
Existing devices for deploying biased appendage clamps face challenges in facilitating the deployment of the clamp in the open position and subsequent release to close around tissue, as they often require high forces and lack efficient mechanisms for varying the spacing between clamp components.
Innovation Solution
The development of an occlusion clamp deployment device featuring a repositionable frame with links and a counterbias spring that biases the clamp beams away from each other, allowing for controlled opening and closing by varying the spacing between the clamp components, facilitated by a deployment shaft and tether system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a biased appendage clamp is used to close around tissue, then the clamp can securely occlude the tissue, but high forces are required to overcome the bias and deploy the clamp in the open position
Solution Approach 1:
The deployment device includes a mechanism that pre-positions and pre-acts on the clamp before final deployment. The repositionable frame and links are configured to progressively overcome the spring bias in controlled stages, reducing the peak force required while ensuring reliable clamp closure on the tissue.
2Device complexity
If the clamp components are fixed in position, then the structure is simple, but the spacing between clamp components cannot be varied to accommodate non-uniform tissue thickness
Solution Approach 1:
The deployment device incorporates a repositionable frame with links that can dynamically adjust the spacing between clamp components. This dynamic configuration allows the clamp to adapt to non-uniform tissue thickness while maintaining a relatively simple overall structure through the use of articulated linkages rather than complex adjustable mechanisms.
3Force
If a deployment mechanism is added to facilitate clamp opening, then the force requirements are reduced, but the device complexity increases
Solution Approach 1:
The repositionable frame and links serve as intermediary elements between the actuation mechanism and the clamp itself. These intermediaries translate and distribute the actuation force efficiently, reducing the force required to open the clamp while keeping the overall device complexity manageable through the use of simple geometric linkages.
4Ease of operation
If the clamp is designed for minimal invasiveness, then the device can be introduced through small incisions, but the mechanism for varying spacing between clamp components becomes more complex
Solution Approach 1:
The deployment device is segmented into modular components including the repositionable frame, links, and clamp assembly. This segmentation allows the spacing adjustment mechanism to be integrated within the minimal invasive delivery system without requiring complex external adjustment mechanisms, as each segment can be independently positioned and adjusted through the small incision.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables efficient deployment and closure of the clamp with reduced force requirements, accommodating non-uniform tissue thickness and varying anatomical structures, while maintaining compatibility with MRI imaging and biocompatibility.
Implementation Method 1
an occlusion clamp deployment device including a counterbias spring biasing the first and second beams of the occlusion clamp away from one another
Implementation Method 2
the first beam includes a first end coupled to a first end of the second beam by a first occlusion spring, and the first beam includes a second end coupled to a second end of the second beam by a second occlusion spring
Data Source
AI summary
An occlusion device including a first clamping portion and a second clamping portion operatively coupled to one another via a U-shaped urging member, a fabric cover circumscribing the first clamping portion, the second clamping portion, and the U-shaped urging member, the fabric cover including an attachment wing extending away from at least one of the first clamping portion and the second clamping portion, the attachment wing including a through orifice.