Gamma-Sterile Povidone-Iodine Packaging With Iodide Stabilization

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Solution Overview

Problem

Existing surgical antiseptic solutions, such as povidone-iodine, require dilution to reduce toxicity, which is time-consuming and distracts during operations, and gamma sterilization degrades the solution below effective concentrations.

Innovation Solution

A ready-to-use, gamma-ray sterilized povidone-iodine solution in a buffered saline solution with added iodide stabilizes the iodine concentration, maintaining efficacy even at reduced concentrations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If povidone-iodine is sterilized using gamma rays, then sterility is achieved, but the available iodine concentration degrades below effective levels

Engineering Contradiction:

ImprovesterilityVSAvoidavailable iodine concentration

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

The patent changes the chemical parameters of the povidone-iodine solution by adjusting the molar ratio of povidone to iodine and controlling the available iodine concentration within a specific range (0.5-5% w/v). This parameter optimization ensures that after gamma radiation sterilization, sufficient available iodine remains to maintain antiseptic efficacy while achieving complete sterility.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent creates a composite povidone-iodine complex with specific molecular structure and composition ratios. This composite material design ensures stability during gamma radiation exposure, preventing excessive degradation of available iodine while maintaining the antiseptic properties necessary for surgical applications.

Inventive Principle:

Principle #40Composite materials

2Object-affected harmful factors

If povidone-iodine concentration is reduced to below 3% for surgical use, then tissue toxicity is reduced, but the solution becomes more susceptible to degradation during sterilization

Engineering Contradiction:

Improvetissue toxicityVSAvoidsolution stability during sterilization

Core Design Contradiction:

Object-affected harmful factorsVSStability of the object's composition

Solution Approach 1:

The patent optimizes the concentration parameters of available iodine (0.5-5% w/v) and the povidone to iodine molar ratio to ensure the solution remains stable during gamma radiation sterilization. This parameter control allows the use of lower concentrations safe for tissue contact while preventing excessive degradation during the sterilization process.

Inventive Principle:

Principle #35Parameter changes

3Ease of operation

If povidone-iodine is diluted in the operating room, then the correct concentration for surgical use is achieved, but valuable time is lost and the process becomes a distraction during surgery

Engineering Contradiction:

Improveconcentration adjustmentVSAvoidtime for mixing solution

Core Design Contradiction:

Ease of operationVSLoss of time

Solution Approach 1:

The patent performs the concentration adjustment and sterilization processes in advance during manufacturing, producing a ready-to-use solution with the optimal concentration range (0.5-5% available iodine). This preliminary action eliminates the need for time-consuming dilution and mixing operations in the operating room, allowing surgeons to immediately use the pre-prepared solution without distraction or time loss.

Inventive Principle:

Principle #10Preliminary action

4Ease of manufacture

If conventional packaging is used for povidone-iodine, then storage and transport are simplified, but the packaging cannot be terminally sterilized while maintaining solution integrity

Engineering Contradiction:

Improvepackaging simplicityVSAvoidsterilization capability

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The patent develops a specialized packaging system with composite material construction that is compatible with gamma radiation sterilization. The packaging materials are selected and designed to withstand terminal sterilization processes while maintaining the chemical integrity and concentration stability of the povidone-iodine solution, enabling both simplified single-package storage and reliable sterilization capability.

Inventive Principle:

Principle #40Composite materials

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

The solution maintains effective iodine levels post-sterilization, allowing direct application in surgical settings without dilution, ensuring sterility and efficacy.

Implementation Method 1

exposing the package containing the composition to gamma radiation to sterilize the package and the composition

Methodology Applied

Scientific EffectGamma radiation sterilization: Radiation

Implementation Method 2

iodide in sufficient quantity to provide donor iodine upon gamma irradiation to stabilize the povidone-iodine

Methodology Applied

Scientific EffectIodide donation: Redox Reactions

Data Source

PatentUS12472162B2Ready-to-use, terminally sterile packaging for surgical antiseptic and method of use

Publication Date: 2025.11.18 BECTON DICKINSON & CO

AI summary

A ready-to-use, gamma-ray sterilized, surgical antiseptic composition comprising an initial non-toxic concentration of povidone-iodine above a minimum effective concentration of available iodine, iodide in sufficient quantity to provide donor iodine upon gamma irradiation to stabilize said povidone-iodine and maintain said minimum effective concentration of available iodine, and a buffered saline solution.