Medical Device Deployment Handle With Segmented Control Knobs
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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 also being user-friendly for clinicians, particularly in 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 cover mechanism that reveals additional knobs for steering and reconstraining, with a ratchet mechanism for tactile feedback and distinct operational steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a dual actuating mechanism is implemented to enable complex deployment modes, then the device complexity increases, but the ease of operation improves through structured control
Solution Approach 1:
The handle is divided into multiple functional zones with distinct knobs (first knob for constraining sheath, second knob for blocking mechanism, third knob for steering) that operate independently. This segmentation allows complex deployment modes to be managed through separate, manageable controls, improving ease of operation despite increased device complexity.
Solution Approach 2:
The cover mechanism dynamically reveals or hides knobs based on the deployment stage. Initially, only essential controls are accessible; as deployment progresses, additional controls become available. This dynamic accessibility structures the operation sequence and reduces cognitive load, addressing the complexity-ease of operation contradiction.
2Adaptability or versatility
If multiple knobs and controls are added for steering and reconstraining functions, then the adaptability improves, but the ease of operation deteriorates due to increased complexity
Solution Approach 1:
Additional knobs are nested within a cover that can be opened or closed. The cover protects unused controls and presents only the necessary controls for the current deployment stage. This nesting approach maintains adaptability for multiple functions while preserving ease of operation by eliminating unnecessary controls from the user interface at any given time.
Solution Approach 2:
The system pre-arranges the operation sequence through the cover mechanism, which automatically becomes accessible at appropriate deployment stages. This preliminary structuring of control availability guides the user through the complex deployment process without requiring them to manage all controls simultaneously, thus maintaining ease of operation while providing adaptability.
3Reliability
If a ratchet mechanism is added for tactile feedback, then the reliability improves through distinct operational steps, but the device complexity increases
Solution Approach 1:
The ratchet mechanism provides tactile feedback to indicate discrete operational steps and proper engagement of deployment stages. This feedback system enhances reliability by giving the user confidence that each action is correctly executed, while the mechanical simplicity of the ratchet minimizes the increase in device complexity.
Data Source
AI summary
A catheter assembly includes a tubular first and second catheters in fluid communication with each other, wherein the second catheter includes a port fitting and can be elastically longitudinally strained to cinch the first and second catheters together.