Medical Device Deployment Handle With Dual Actuating Mechanism
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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 during endoluminal treatment of aortic diseases.
Innovation Solution
The introducer assembly features a handle with a dual actuating mechanism that allows for the controlled deployment of vascular implants by transitioning between constraining and deployment states, utilizing a film sleeve or axially displaceable tube, and includes a ratchet mechanism for tactile feedback and distinct operational steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a simple deployment system is used, then ease of use is maintained, but the capability to accommodate complex deployment modes (steering, reconstraining, multiple stage deployment) is insufficient
Solution Approach 1:
The deployment system is divided into distinct functional modules: a handle assembly with multiple independent actuating mechanisms, a deployment member with sequential deployment zones, and a vascular implant. Each module performs a specific function (steering, reconstraining, deployment), allowing the system to accommodate complex deployment modes while keeping each component relatively simple and manageable.
Solution Approach 2:
The handle assembly is designed as a multi-functional device that can perform multiple deployment operations (steering, reconstraining, single-stage deployment, multi-stage deployment) through different actuating mechanisms. This universal design allows a single system to accommodate various complex deployment modes without requiring separate specialized devices for each function.
2Manufacturing precision
If multiple actuating mechanisms are added to handle complex deployment modes, then deployment control is improved, but ease of operation deteriorates
Solution Approach 1:
The actuating mechanisms are designed with dynamic characteristics that provide tactile feedback to the clinician during operation. The ratchet mechanism creates distinct tactile steps that guide the clinician through the deployment sequence, making the operation intuitive despite the presence of multiple mechanisms. The mechanisms transition between locked and unlocked states, providing natural feedback that simplifies operation.
Solution Approach 2:
The ratchet mechanism provides tactile feedback during deployment, creating distinct operational steps that guide the clinician through the deployment sequence. This feedback mechanism allows the clinician to sense the deployment progress and status without requiring complex displays or additional controls, thereby maintaining ease of operation while achieving precise deployment control.
3Ease of operation
If a ratchet mechanism with tactile feedback is implemented, then operational control is improved, but device complexity increases
Solution Approach 1:
The ratchet mechanism is designed to be self-regulating, automatically providing tactile feedback and controlling the deployment sequence without requiring additional external controls or complex electronic systems. The mechanical ratchet structure inherently provides the feedback and control functions, eliminating the need for separate feedback devices and simplifying the overall system architecture.
Data Source
AI summary
An introducer assembly includes a first actuating mechanism for actuating a constraining sheath between a first state releasably constraining a vascular implant and a second state allowing deployment of the vascular implant; a second actuating mechanism for actuating a blocking mechanism between a blocked state for blocking other functions of the handle and an unblocked state for allowing operation of the other functions of the handle; and an operating knob operatively coupled to both of the first and second actuating mechanisms for concurrent operation of both of the first and second actuating mechanisms in response to actuation of the operating knob.