Subcutaneous IV Cannula Anchor for Adhesive-Free Securement
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Solution Overview
Problem
Existing intravenous cannulas often require external adhesives to secure them to the skin, which can be cumbersome and may cause skin irritation, and there is a need for a more secure and adhesive-free anchoring mechanism.
Innovation Solution
An intravenous cannula system with a subcutaneous anchor integrally formed with the catheter, which engages with underlying tissue to secure the cannula in place without external adhesives, using structures like flexible circumferential rings, recessed tabs, or slotted circumferential rings that anchor in the subcutaneous layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If external adhesives are used to secure the intravenous cannula to the skin, then the cannula can be anchored to the skin, but skin irritation occurs and the setup becomes cumbersome
Solution Approach 1:
The patent extracts the anchoring function from the external adhesive system and integrates it directly into the cannula structure. The anchor is formed as an integral part of the catheter body, eliminating the need for separate adhesive materials that cause skin irritation. This extraction separates the anchoring mechanism from the harmful adhesive component while maintaining secure skin attachment.
Solution Approach 2:
The patent merges the anchoring function with the cannula structure by forming the anchor as an integral component of the catheter. The anchor is combined with the catheter body in a single manufactured unit, eliminating the need for separate adhesive applications. This integration consolidates multiple functions (cannula body and anchoring mechanism) into one unified structure that secures the device without harmful adhesives.
2Reliability
If adhesive tape is wrapped around the cannula and skin, then the cannula can be secured to the skin, but the procedure becomes cumbersome and time-consuming
Solution Approach 1:
The patent applies preliminary action by pre-forming the anchor as an integral part of the cannula during manufacturing. The anchoring mechanism is prepared in advance as a built-in feature, eliminating the need for time-consuming adhesive application procedures at the time of use. The anchor is ready to engage with subcutaneous tissue immediately upon insertion.
Solution Approach 2:
The patent implements self-service by designing the anchor to automatically engage with subcutaneous tissue upon cannula insertion. The anchor serves itself by utilizing the insertion motion and tissue interaction to achieve securing without requiring external adhesive application. The system performs the anchoring function autonomously through its integrated design rather than requiring separate adhesive procedures.
3Object-affected harmful factors
If a subcutaneous anchor is integrally formed with the catheter, then external adhesives are eliminated, but the device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the cannula structure into distinct functional regions: the catheter body, the anchor portion, and the insertion needle. The anchor is segmented as a separate but integral component that can be formed independently during manufacturing. This segmentation allows for simplified manufacturing of individual components while maintaining overall device functionality and reducing complexity compared to a fully integrated monolithic design.
Data Source
AI summary
Some embodiments of a medical system include a subcutaneous anchor device that extends outwardly from side wall of an intravenous cannula so as to secure the intravenous cannula in a position relative to a skin penetration point.