Locking Collet Catheter Stabilizer with Lever Actuation
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Solution Overview
Problem
Traditional methods of securing catheters and medical lines using tape lead to skin irritation, contamination, and infection due to adhesive residue, and require frequent changes, which can cause catheter displacement.
Innovation Solution
A securement device featuring an anchor pad with adhesive and a movable collet that clamps the medical article, allowing for secure positioning and easy release, using a lever to move between open and closed positions to form a flow passage and maintain the medical article in place.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If adhesive tape is used to secure the catheter, then the catheter can be held in place, but skin irritation and infection risk increase due to adhesive residue
Solution Approach 1:
The securement device is divided into separate functional components: an anchor pad with adhesive for skin attachment, a base member for structural support, and a collet mechanism for catheter clamping. This segmentation allows the adhesive to be isolated on the anchor pad while the catheter contact surface uses a non-adhesive collet mechanism, eliminating adhesive residue contact with both skin and catheter.
Solution Approach 2:
The harmful adhesive function is extracted and isolated to only the anchor pad's lower surface that contacts the skin. The catheter-securing function is transferred to the collet mechanism, which uses mechanical clamping instead of adhesive. This extraction eliminates the harmful interaction between adhesive and catheter while preserving the beneficial anchoring function.
2Duration of action of stationary object
If adhesive tape is used to secure the catheter, then initial securing is achieved, but frequent changes are required causing catheter displacement
Solution Approach 1:
The collet mechanism is pre-configured with adjustable clamping force capability and a locking feature that can be engaged after catheter insertion. This preliminary setup allows the device to maintain securement over extended periods without requiring frequent changes, as the locking collet provides long-lasting stable fixation.
Solution Approach 2:
The collet mechanism provides dynamic adjustment capability, allowing the clamping force to be optimized during application and then locked in place. This dynamic feature enables the device to adapt to different catheter sizes and insertion conditions while maintaining stable positioning throughout the securement duration.
3Stability of the object's composition
If adhesive tape is used to secure the catheter, then the catheter can be attached, but handling difficulty increases due to stickiness from residue
Solution Approach 1:
The adhesive function is extracted and restricted to only the anchor pad's skin-contact surface. The catheter-attachment function is transferred to the collet mechanism, which uses friction-based mechanical clamping without adhesive. This eliminates the stickiness problem while maintaining secure attachment, allowing easy handling during procedures.
Solution Approach 2:
The adhesive mechanical system is replaced with a pure mechanical clamping system using the collet and compression spring. This substitution eliminates the chemical adhesive properties that cause stickiness, providing a clean mechanical attachment method that maintains ease of handling while ensuring secure catheter fixation.
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 device effectively secures medical articles without tape-related complications, reducing the risk of infection and skin irritation, while allowing for easy release and repositioning, thus providing a stable and hygienic solution for extended catheterization.
Implementation Method 1
At least a portion of the lower surface is covered by an adhesive
Implementation Method 2
The clamping member includes a compression spring and a collet. The collet is biased by the compression spring into the contracted position so as to clamp the medical article
Data Source
AI summary
A medical article, such as a catheter hub, is stabilized on a patient with a retainer having a base and clamp or moveable collet. A lever is configured to move the collet in a longitudinal direction relative to the based to secure the medical article to the retainer. When rotated, the lever pulls the collet in a direction away from the patient while collapsing the collet around at least a portion of the catheter hub.