Medical Device Handle With Fiber Slack For Delayed Actuation
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Solution Overview
Problem
Current medical device deployment systems lack the capability to accommodate complex deployment modes, such as steering, reconstraining, and multiple stage deployment, while maintaining ease of use for clinicians, particularly in endoluminal treatment of aortic diseases.
Innovation Solution
The introducer assembly includes a handle with a dual actuating mechanism that allows for the deployment of vascular implants by transitioning between constraining and deployment states, featuring a film sleeve or axially displaceable tube constraint, and a ratchet mechanism for controlled knob operation, enabling concurrent actuation of the sheath and blocking mechanisms with tactile feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a dual actuating mechanism with multiple functions is implemented, then the capability to accommodate complex deployment modes is improved, but the device complexity increases
Solution Approach 1:
The handle is designed with a dual actuating mechanism where a single handle structure performs multiple functions: it can actuate the deployment sheath through a first actuator and control the blocking mechanism through a second actuator. This multi-functional design allows the device to accommodate complex deployment modes including steering, reconstraining, and multiple stage deployment while using a unified control interface that maintains ease of use for clinicians
2Adaptability or versatility
If multiple actuating mechanisms are integrated into the handle, then the functionality for concurrent operation is improved, but the ease of operation may deteriorate
Solution Approach 1:
The first and second actuators are integrated into a single handle structure, allowing concurrent operation of the deployment sheath and blocking mechanism through coordinated actuation. The actuators share common structural elements and control interfaces, enabling clinicians to perform complex deployment sequences without managing separate devices, thereby maintaining ease of operation while achieving sophisticated deployment capabilities
3Measurement precision
If a ratchet mechanism is added for controlled operation, then the precision of positioning is improved, but the device complexity increases
Solution Approach 1:
The ratchet mechanism incorporates tactile feedback through engagement teeth that provide audible and tactile clicks during actuation. This feedback mechanism allows clinicians to precisely control the actuation of the blocking mechanism and deployment sheath by feeling the discrete engagement positions, thereby achieving precise positioning without requiring complex electronic control systems or additional sensors
Data Source
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Figure 9A~9B
AI summary
An introducer assembly having a handle, at least one fiber operatively coupling at least one handle with one or more functions of the handle; and having a fiber routing system that allows a predetermined amount of slack to be created during assembly in at least one fiber so as to delay by a desired amount of time actuation of the one or more functions of the handle associated with the at least one fiber during operation of the handle.