Infusion Set Cannula Assembly With Solid Needle Alignment

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Solution Overview

Problem

Existing infusion sets are difficult to handle due to challenges in connecting and positioning the cannula and needle components, leading to potential damage and discomfort during insertion.

Innovation Solution

The infusion set design includes a soft cannula with a solid needle having a conical tip and enhanced flexural rigidity, allowing for a snap connection and concentric arrangement, minimizing tissue injury and facilitating easy assembly and disassembly.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a hollow needle is used to guide the cannula, then the cannula can be positioned and inserted into the skin, but the infusion set becomes difficult to handle

Engineering Contradiction:

Improvehandling of infusion setVSAvoidstructure of infusion set

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The patent removes the hollow needle component from the infusion set design. Instead of using a hollow needle to guide the cannula, the invention uses a solid needleless connector that directly receives the cannula. This extraction of the hollow needle simplifies the overall structure and improves ease of handling while maintaining the essential function of guiding and securing the cannula in place.

Inventive Principle:

Principle #2Taking out (Extraction)

2Ease of operation

If the cannula and needle are connected, then the infusion set can function, but assembly and disassembly become difficult

Engineering Contradiction:

Improveassembly and disassemblyVSAvoidconnection stability

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent employs a dynamic snap connection mechanism that allows easy assembly and disassembly. The connector features a resilient element that can be compressed to release the cannula and naturally snaps into place during assembly, providing automatic locking. This dynamic mechanism maintains reliable connection during use while enabling simple attachment and detachment when needed.

Inventive Principle:

Principle #15Dynamics

3Strength

If a solid needle is used, then flexural rigidity is enhanced, but tissue damage may increase

Engineering Contradiction:

Improveflexural rigidityVSAvoidtissue injury

Core Design Contradiction:

StrengthVSObject-affected harmful factors

Solution Approach 1:

The patent converts the potential harm of a solid needle into a benefit by using the solid needle's enhanced flexural rigidity to ensure proper cannula positioning and alignment during insertion, while the needleless design eliminates tissue puncture damage. The solid structure provides the mechanical strength needed for accurate placement without the harmful puncture effect of a hollow needle.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Data Source

PatentUS20260014316A1Infusion set for an infusion device

Publication Date: 2026.01.15 MYLIFE DIABETES CARE AG

AI summary

An infusion set includes a base part for attaching to the skin of a patient. A cannula for supplying a liquid medicament into the body of the patient is provided on the distal side of the base part. Additionally, a cap part for holding the infusion set by means of the patient or an insertion device or a piercing aid is provided, a needle being provided on the distal side thereof. The base part and the cap part can be connected together in order to attach the base part connected to the cap part to the skin of the patient. The needle is arranged within the cannula, with the tip of the needle having a conical shape, and the needle is made of a solid material.