Stylet Assembly Hub Engagement for Catheter Control
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Solution Overview
Problem
Conventional stylet caps prevent the distal end of a stylet from reaching the distal end of a catheter, making it difficult to control the catheter during insertion, placement, and repositioning.
Innovation Solution
A stylet assembly with a stylet cap that includes a base portion and securing members configured to removably attach to a catheter connection hub, ensuring the distal end of the stylet is consistently located at or near the distal end of the catheter, enhancing control and stability during procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional stylet cap is used to retain the stylet outside the catheter, then the stylet can be easily withdrawn and reinserted without risk of irreversible insertion, but the distal end of the stylet cannot reach the distal end of the catheter, leaving the catheter flexible and difficult to control
Solution Approach 1:
The stylet cap is divided into two functional segments: a stylet retention portion that holds the stylet at a controlled distance, and a catheter hub engagement portion that attaches to the catheter hub. This segmentation allows the stylet to be retained outside the catheter while maintaining catheter control through the engagement portion.
Solution Approach 2:
The catheter hub engagement portion acts as an intermediary between the stylet cap and the catheter hub. It provides a Luer lock connection that secures the stylet cap to the catheter hub, enabling control of the catheter during insertion while maintaining the stylet's external retention for easy withdrawal and reinsertion.
2Measurement precision
If the distal end of the stylet is positioned at or near the distal end of the catheter, then precise control and reinforcement of the catheter is achieved, but the stylet cap structure becomes more complex to accommodate the extended stylet position
Solution Approach 1:
The stylet cap combines the stylet retention function and catheter hub engagement function into a single integrated structure. The stylet is retained within the cap body while the cap simultaneously engages the catheter hub via Luer lock connection, achieving precise stylet positioning without requiring multiple separate components.
Solution Approach 2:
The stylet cap serves multiple functions: it retains the stylet at a precise position, engages the catheter hub for secure attachment, and provides a interface for fluid introduction. This multi-functionality reduces the need for additional components while maintaining precise stylet positioning.
Data Source
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AI summary
Stylet assemblies include one or more securing members extending from a base portion of the stylet assembly and configured to removably attach to a portion of an associated structure. Catheter kits and catheter assemblies may include such stylet assemblies. Methods of using a catheter assembly may include inserting at least a portion of a stylet coupled to a stylet cap in a catheter associated with a catheter connection and securing a portion of the stylet cap to only a portion of the catheter connection hub.