Micropatterned Silicone Dressing for Oxygen Delivery to Chronic Wounds
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Solution Overview
Problem
Chronic wounds, particularly those associated with diabetes, are difficult to heal due to compromised oxygen delivery and the diffusion barrier of oxygen through water, leading to ineffective treatment options like hyperbaric oxygen therapy that are costly and limited in accessibility.
Innovation Solution
A wound dressing system with an oxygen-permeable membrane featuring microstructured pillars that allows direct oxygen delivery to the wound, combined with an oxygen delivery conduit and system, utilizing hydrophobic silicone polymers and hydrogels to enhance oxygen permeability and promote healing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a moist wound environment is created to promote healing, then wound healing conditions are improved, but oxygen diffusion to the wound is reduced due to the diffusion barrier of water
Solution Approach 1:
The patent uses an oxygen-permeable membrane as an intermediary layer between the oxygen source and the wound. This membrane allows oxygen to pass through while maintaining a moist environment at the wound interface, effectively mediating between the conflicting requirements of moisture retention and oxygen delivery.
Solution Approach 2:
The invention employs porous or micropatterned structures in the oxygen-permeable membrane that allow oxygen molecules to diffuse through while still maintaining moisture at the wound surface. The porous structure provides pathways for oxygen transport without creating a barrier to water retention.
2Quantity of substance
If hyperbaric oxygen therapy is used to deliver oxygen to chronic wounds, then oxygen delivery is improved, but treatment accessibility and cost-effectiveness deteriorate due to limited centers and high costs
Solution Approach 1:
The patent extracts the oxygen delivery function from the complex hyperbaric oxygen therapy system and implements it locally at the wound site using a simple oxygen-permeable membrane device. This eliminates the need for expensive, centralized hyperbaric chambers while maintaining effective oxygen delivery to the wound.
Solution Approach 2:
The oxygen-permeable membrane dressing is designed as a disposable, low-cost device that can be applied directly to the wound. This replaces the expensive, reusable hyperbaric oxygen therapy infrastructure with an affordable, single-use solution that improves accessibility.
3Reliability
If conventional wound dressings are used to maintain moisture, then wound environment is improved, but oxygen diffusion is blocked by the water layer
Solution Approach 1:
The patent uses composite materials that combine oxygen-permeable properties with moisture-retention capabilities. The oxygen-permeable membrane is composed of materials that allow selective passage of oxygen molecules while maintaining a hydrated environment at the wound interface, resolving the conflict between moisture and oxygen delivery.
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 system effectively delivers oxygen to chronic wounds, overcoming the diffusion barrier and promoting wound healing, even in subjects unsuitable for hyperbaric therapy, by creating a moist environment and supporting cellular growth.
Implementation Method 1
oxygen can diffuse from the first surface through the oxygen-permeable material toward and through the pillars
Implementation Method 2
the oxygen-permeable material comprises an organosilicon polymer. For example the organosilicon polymer can be comprised mostly of hydrophobic polydimethylsiloxane (PDMS)
Data Source
AI summary
A wound dressing system having an oxygen-permeable membrane having a first surface and a second surface with oxygen-permeable pillars extending from the second surface is described.