Color-Changing Use Indicator for Medical Devices

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Solution Overview

Problem

Medical, dental, and veterinary devices are often unintentionally reused due to confusion about their usage status, leading to the spread of contaminants and infectious diseases.

Innovation Solution

Incorporating use indicators that react with bodily fluids or environmental conditions to visually indicate previous use, combined with protocols and software systems to track device usage, ensuring accurate identification of used devices before reuse.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If disposable devices are used without use indicators, then device simplicity is maintained, but the risk of unintentional reuse increases

Engineering Contradiction:

Improveprevention of unintentional reuseVSAvoiddevice structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent applies color-changing indicators that visibly change state (e.g., from clear to colored) when exposed to bodily fluids or environmental conditions. This provides an immediate, unambiguous visual signal of device usage status, eliminating confusion between used and unused devices without adding complex mechanical or electronic components.

Inventive Principle:

Principle #32Color changes

Solution Approach 2:

The use indicator is pre-configured to automatically react upon contact with bodily fluids or environmental conditions during the intended use of the device. This preliminary action occurs at the moment of use, ensuring the indicator is activated before the device could potentially be reused, providing proactive prevention rather than requiring post-use verification.

Inventive Principle:

Principle #10Preliminary action

2Measurement precision

If use indicators are added to devices, then identification of used devices improves, but manufacturing complexity increases

Engineering Contradiction:

Improveusage status detectionVSAvoiddevice production

Core Design Contradiction:

Measurement precisionVSEase of manufacture

Solution Approach 1:

The indicator utilizes color-changing materials that can be integrated into the device manufacturing process through standard coating or embedding techniques. These materials respond to specific stimuli (bodily fluids, moisture, temperature) with visible color changes, providing precise usage status detection without requiring complex assembly or specialized manufacturing equipment.

Inventive Principle:

Principle #32Color changes

Solution Approach 2:

The use indicator is designed as a disposable component with a simple structure that can be manufactured at low cost. Since the device itself is disposable, the indicator does not need to be durable or reusable, allowing for simpler, cheaper materials and manufacturing processes that still provide reliable usage indication.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

3Object-affected harmful factors

If disposable suction tips are used without clear usage indication, then procedural efficiency is maintained, but cross-contamination risk increases

Engineering Contradiction:

Improvecross-contaminationVSAvoidprocedural efficiency

Core Design Contradiction:

Object-affected harmful factorsVSProductivity

Solution Approach 1:

The suction tip incorporates a color-changing indicator that provides immediate visual feedback of usage status. This allows medical personnel to quickly identify used tips without slowing down procedures, maintaining procedural efficiency while eliminating the risk of reusing contaminated tips. The color change occurs automatically during use, requiring no additional verification steps.

Inventive Principle:

Principle #32Color changes

Solution Approach 2:

The use indicator provides real-time feedback during the suction procedure by changing color upon contact with bodily fluids. This immediate feedback mechanism ensures that personnel can instantly recognize when a tip has been used and should be discarded, preventing cross-contamination while maintaining workflow efficiency through intuitive visual signaling.

Inventive Principle:

Principle #23Feedback

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

Reduces instances of unintentional reuse, minimizing the introduction of unsanitary objects during procedures and stemming the spread of infectious diseases by clearly distinguishing used from unused devices.

Implementation Method 1

Incorporating use indicators that react with bodily fluids or environmental conditions to visually indicate previous use

Methodology Applied

Scientific EffectChemical reaction with bodily fluids:

Implementation Method 2

Incorporating use indicators that react with bodily fluids or environmental conditions to visually indicate previous use

Methodology Applied

Scientific EffectReaction to environmental conditions:

Data Source

PatentUS20230070622A1Medical, dental, or veterinary device with use indicator

Publication Date: 2023.03.09 FIGUEROA SEIDY

AI summary

A medical, dental, or veterinary device with a use indicator includes a proximal end and a distal end configured to interact with a human or animal subject, the distal end including a use indication portion, wherein the use indication portion includes a reactive agent to react with a foreign substance to exhibit a visible change in appearance of the reactive agent to indicate to a veterinary, dental, or medical professional that the device had been previously used and must be sterilized or disposed.