Integral Indicator for Single-Use Medical Devices

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Solution Overview

Problem

The reuse of single-use medical devices poses a significant risk of nosocomial infections due to improper sterilization and reuse, highlighting the need for irreversible indicators that render devices inoperable after a single procedure to prevent recirculation.

Innovation Solution

Integration of a polymeric material in medical devices that irreversibly transitions from an operative to an inoperative conformation upon exposure to steam sterilization or elevated temperatures, ensuring the device is rendered unusable after a single procedure.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If single-procedure devices are made reusable through proper sterilization, then device cost and waste are reduced, but the risk of nosocomial infections increases due to inadequate sterilization or reuse errors

Engineering Contradiction:

Improveprevention of nosocomial infectionsVSAvoiddevice lifecycle management complexity

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent applies preliminary action by incorporating an integral indicator into the device before use that automatically activates upon exposure to sterilization conditions. This pre-configured indicator proactively signals when the device has been sterilized and should not be reused, preventing nosocomial infections before they can occur through improper reuse. The indicator is prepared in advance and requires no additional action during or after sterilization.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The device performs self-service by autonomously indicating its sterilization status through the integral indicator that changes state in response to sterilization exposure. The device monitors and communicates its own lifecycle status without requiring external tracking systems or manual documentation, simplifying device lifecycle management while ensuring infection prevention.

Inventive Principle:

Principle #25Self-service

2Reliability

If integral indicators are integrated into single-procedure devices, then device reuse is prevented through irreversible morphological transformation, but device complexity increases

Engineering Contradiction:

Improveprevention of device reuseVSAvoiddevice structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent merges the indicator function directly into the device structure by making the indicator integral to the device body. The indicator and device are combined as a single unified component rather than separate elements, eliminating the need for additional attachment mechanisms or separate indicator devices. This integration prevents device reuse through irreversible morphological transformation while minimizing increases in overall device complexity.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The integral indicator utilizes parameter changes in the polymeric material's physical state in response to sterilization conditions. The material undergoes irreversible morphological transformation—such as melting, deformation, or structural change—when exposed to sterilization temperatures or chemical agents. This parameter change provides a clear, unambiguous signal that the device has been sterilized and should not be reused, achieving reliable reuse prevention through material property changes rather than complex mechanical or electronic systems.

Inventive Principle:

Principle #35Parameter changes

3Measurement precision

If polymeric materials with low melting points are used for integral indicators, then sterilization detection is enhanced through irreversible conformational change, but device structural integrity may be compromised

Engineering Contradiction:

Improvesterilization exposure detectionVSAvoiddevice structural integrity

Core Design Contradiction:

Measurement precisionVSStrength

Solution Approach 1:

The patent applies local quality by confining the low melting point polymeric material to a specific localized region within the device—the integral indicator portion—rather than using it throughout the entire device structure. This localized application allows the indicator to undergo irreversible conformational change for precise sterilization detection while the rest of the device maintains its structural integrity through materials with appropriate mechanical properties. The indicator region is strategically positioned where morphological change will not compromise overall device strength.

Inventive Principle:

Principle #3Local quality

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

This solution effectively prevents the reuse of single-use medical devices by ensuring they become inoperable after a single procedure, thereby reducing the risk of nosocomial infections and ensuring patient safety.

Implementation Method 1

the integral indicator is composed of a polymeric material configured to irreversibly transition from a surgically operative conformation to a surgically inoperative conformation in response to an exposure after the single-procedure

Methodology Applied

Scientific EffectMelting: Melting

Implementation Method 2

Methodology Applied

Scientific EffectThermal decomposition: Pyrolysis

Data Source

PatentUS20220152890A1Integral indicators for single-procedure devices

Publication Date: 2022.05.19 VIANT AS&O HLDG LLC

AI summary

Disclosed herein are single-use integral indicators and methods and systems for employing the same. Such indicators and their uses are directed toward identifying and rendering inoperable single-procedure medical devices after their intended—and only—use.