Infusion Set Insertion Device With Perpendicular Cannula Guidance

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Solution Overview

Problem

Existing infusion set insertion devices lack guidance during cannula insertion, leading to potential skin injuries due to improper penetration angles.

Innovation Solution

An insertion device with a retaining element and a rotatable head part, featuring a guide element and mating guide element, allows for controlled movement of the infusion set along a central axis, ensuring perpendicular penetration and secure retention.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the infusion set is pushed out of the device without guidance, then the insertion process is simple and fast, but the cannula does not penetrate sufficiently perpendicularly to the injection site causing skin injuries

Engineering Contradiction:

Improveinsertion simplicityVSAvoidskin injuries

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

A guide element is introduced as an intermediary component between the base part and the retaining element. This guide element includes a guide curve that interacts with a mating guide element (guide cam) to transform rotational motion into controlled axial movement, ensuring the cannula penetrates perpendicularly to the skin while maintaining ease of operation through a simple twisting motion

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent replaces uncontrolled mechanical pushing with a guided mechanical system. The guide curve and guide cam mechanism substitutes the direct axial pushing motion with a rotation-guided motion that automatically ensures perpendicular penetration, eliminating skin injuries while maintaining operational simplicity

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Object-affected harmful factors

If a guide element is added to ensure perpendicular penetration, then skin injury risk is reduced, but the device complexity increases

Engineering Contradiction:

Improveskin injuriesVSAvoidstructure complexity

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The guide element is merged with the base part structure, and the guide curve is integrated into the retaining element. The mating guide element (guide cam) is combined with the base part's structural features. This merging approach reduces the number of separate components while maintaining the guidance function, thus reducing overall device complexity

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The guide element serves multiple functions: it provides guidance for perpendicular penetration, acts as a structural support for the retaining element, and enables the conversion of rotational motion to axial motion. This multi-functionality reduces the need for additional separate components, thereby reducing device complexity

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Reliability

If the retaining element is made elastic and tensionable for secure retention, then the infusion set is securely held, but the device complexity and manufacturing difficulty increase

Engineering Contradiction:

Improveretention securityVSAvoidmanufacturing difficulty

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The retaining element's elasticity and tensionability are achieved through parameter changes in the material selection and geometric design. By adjusting the material properties (elastic modulus, strength) and geometric parameters (cross-section, length), the retaining element provides secure retention without requiring complex elastic mechanisms, thus maintaining ease of manufacture

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The retaining element is designed as a separate, modular component that can be manufactured independently and then assembled to the base part. This segmentation allows for optimized manufacturing of the retaining element using specialized processes while keeping the overall device assembly simple, balancing retention security with manufacturing ease

Inventive Principle:

Principle #1Segmentation

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

Facilitates safer and easier insertion of infusion sets by guiding the cannula perpendicular to the skin, reducing the risk of skin injuries and ensuring secure attachment.

Implementation Method 1

the guide element attached to the retaining element can be guided by a mating guide element provided on the base part, wherein the retaining element is movable relative to the base part from a distal position to a proximal position along the central axis (z)

Methodology Applied

Scientific EffectMechanical guidance through guide curve and guide cam engagement: Cam

Implementation Method 2

The retaining arm may be elastic and/or able to be tensioned

Methodology Applied

Scientific EffectElasticity: Elasticity

Data Source

PatentUS20250281692A1Insertion device for an infusion set

Publication Date: 2025.09.11 MYLIFE DIABETES CARE AG

AI summary

An insertion device for an infusion set includes an advancing element for moving the infusion set from a proximal position to a distal position along a central axis, a retaining element for retaining the infusion set, and a push button. The push button is displaceable along the central axis by an actuation travel and is configured such that, when the push button is actuated by the actuation travel, the retaining element is moved radially outward to at least partially release the infusion set from the retaining element.