Hub Attachment Collar for Safe Catheter Detachment
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Solution Overview
Problem
Conventional systems lack a safe and reliable mechanism for attaching and detaching guide tools and devices, such as catheters, cameras, and endoscopes, from medical apparatus actuators, particularly in robotic medical procedures, which can lead to accidental turning and procedural delays.
Innovation Solution
A hub attachment collar with an inaction zone, a wire disengagement zone, and a hub release zone is introduced, allowing for secure attachment and safe detachment of catheters to medical apparatus actuators. The collar operates through specific zones to control attachment pins, providing feedback mechanisms and safety controls to prevent accidental detachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional attachment mechanism is used to connect catheter to medical apparatus actuator, then the device can be assembled, but accidental turning and detachment may occur during operation
Solution Approach 1:
The attachment collar is divided into three distinct functional zones: an inaction zone where rotation has no effect, a wire disengagement zone where rotation releases wire constraints, and a hub release zone where rotation detaches the hub. This segmentation allows precise control over when attachment and detachment occur, preventing accidental turning while enabling intentional disconnection when needed.
Solution Approach 2:
The attachment collar serves as an intermediary component between the catheter hub and the medical apparatus actuator. It mediates the connection through its zoned structure, providing a controlled interface that prevents direct accidental turning of the catheter while allowing deliberate detachment through rotation into the hub release zone.
2Reliability
If a secure attachment mechanism is implemented to prevent accidental detachment, then safety is improved, but the detachment process becomes more complex and time-consuming
Solution Approach 1:
The attachment collar transitions from a static secure connection to a dynamic controlled detachment process. During normal operation, the collar maintains a secure locked state. When detachment is needed, the user rotates the collar through the wire disengagement zone and into the hub release zone, dynamically transitioning from secured to detached state in a single continuous motion.
Solution Approach 2:
The attachment collar is self-latching through its zoned structure. The inaction zone automatically locks the attachment when the catheter is inserted, and the hub release zone automatically releases the attachment when rotated into position. This self-service mechanism eliminates the need for additional locking components or complex manual operations.
3Reliability
If a multi-zone attachment collar is used to control attachment and detachment, then safety is improved, but the device structure becomes more complex
Solution Approach 1:
The attachment collar performs multiple functions within a single component: it provides secure attachment during operation, prevents accidental turning, enables controlled wire disengagement, and facilitates intentional hub detachment. By consolidating these multiple functions into one zoned structure, the design avoids the need for separate mechanisms for each function.
Solution Approach 2:
Different zones of the attachment collar have different rotational characteristics and functional properties. The inaction zone provides rotational freedom without effect, the wire disengagement zone provides controlled wire release, and the hub release zone provides attachment release. This local differentiation of quality within the single collar component achieves complex functionality without proportionally increasing overall device complexity.
Data Source
AI summary
Disclosed are an apparatus and method for medical applications and, more particularly, a hub attachment collar applicable for safe disconnect of guide tools and devices used in medical procedures, including in robotic medical procedures, with such guide tools and devices including catheters, cameras, and endoscopes.