Clamshell Catheter Adapter with Nested Latches
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Solution Overview
Problem
Existing catheter connector devices have exposed locking mechanisms that can lead to accidental uncoupling and require complex alignment processes, posing risks during medical procedures.
Innovation Solution
A clamshell-shaped adapter made of medical plastics with integrally connected shells and a flexible elastomeric tubing, featuring remotely located latch mechanisms and a retainer structure to securely connect and disconnect the catheter from a fluid delivery or storage device, preventing accidental uncoupling and ensuring a fluid-tight seal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If locking mechanisms are exposed on the exterior surface, then the device is easier to operate and align, but accidental uncoupling of the catheter may occur
Solution Approach 1:
The latch mechanisms are nested within the interior surfaces of the shells rather than being exposed on the exterior. The catch and finger are positioned inside the clamshell structure, allowing the locking mechanism to be hidden from external view while still functioning to secure the catheter connection, thereby preventing accidental uncoupling.
Solution Approach 2:
The locking mechanism is repositioned from a two-dimensional exterior surface location to a three-dimensional interior location within the shell structure. This dimensional transition allows the latch to remain accessible for operation while being protected from accidental engagement or disengagement from external forces.
2Reliability
If locking mechanisms are remotely located from exterior surfaces, then accidental uncoupling is prevented, but the alignment process becomes more complex
Solution Approach 1:
The device utilizes the natural closing motion of the clamshell structure itself to engage the locking mechanism. As the shells close together, the finger automatically engages with the catch, eliminating the need for separate alignment steps or complex manipulation procedures. The structure performs the locking action through its inherent motion.
3Ease of operation
If the shells are made with different thicknesses, then the latch mechanisms can be effectively positioned, but the overall device symmetry is reduced
Solution Approach 1:
The shells are designed with different thicknesses at specific local regions where the latch mechanisms are positioned. This localized variation in thickness allows for optimal positioning of the catch and finger while maintaining overall shell integrity and functionality, sacrificing global symmetry for local functional requirements.
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
The adapter provides a secure, tamper-proof connection that prevents accidental uncoupling and ensures a fluid-tight seal, simplifying the alignment process while maintaining ease of use and sterility, thereby enhancing the safety and efficiency of medical procedures.
Implementation Method 1
An elastomeric flexible tubing or tube connects the luer end to the aperture end at the inner surface of the thinner shell so that a through path is established between the luer end and the aperture end
Implementation Method 2
a retainer surface structure at the inner surface of the thicker shell presses against the flexible tubing at the inner surface of the thinner shell to fixedly hold or retain the catheter that has been inserted through the aperture end into the flexible tubing
Implementation Method 3
a latch mechanism that comprises a catch... another latch mechanism in the form of a finger that would snappingly grasp the catch at the other shell, when the two shells are movingly folded along the living hinge towards each other
Data Source
Figure 1~9
Figure 2
Figure 3~8
AI summary
A clam shell shaped adapter for retaining a catheter to establish a fluid path between the catheter and a fluid device or line has two shells integrally connected by a living hinge. A first shell has a luer end and a catheter end wherein a catheter is insertable through its aperture. A flexible tube at the inner surface of the first shell connects the luer end to the catheter end. The catheter is inserted through the catheter end to extend along the flexible tubing. A retainer structure is provided at the inner surface of the second shell so that when the first and second shells close upon each other, the retainer structure presses against the flexible tubing to fixedly retain the catheter in a fluidly sealing manner. Respective latch mechanisms provided at the shells lockingly couple the two shells to each other. The latch mechanisms are located remotely from the outer surfaces and peripheries of the shells to prevent inadvertent uncoupling of the shells. The shells may be uncoupled by inserting a pointed object through a notch to the interior of the device to disengage the latch mechanisms.