Integrated Oxygen and Vacuum Wound Therapy for Stalled Healing
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Solution Overview
Problem
Existing wound treatment methods, such as Negative Pressure Wound Therapy (NPWT), may provide limited efficacy and are contraindicated in cases of advancing infection or limited mobility, necessitating improved devices for enhanced wound healing, especially for acute and chronic wounds like diabetic foot ulcers.
Innovation Solution
An oxygen concentrating device integrated with a wound care apparatus that applies transdermal continuous oxygen therapy and NPWT, utilizing membrane electrode assemblies (MEAs) to produce and consume oxygen, along with a mechanical pump for vacuum, controlled by a microcontroller to manage operational modes for optimal wound treatment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If NPWT is used to treat wounds, then wound drainage and edema reduction are improved, but efficacy is limited when healing stalls or infection advances
Solution Approach 1:
The patent combines NPWT (mechanical suction) with transdermal oxygen therapy (chemical/biological treatment) into a single integrated system. The wound care apparatus includes both a pump for negative pressure application and an oxygen delivery system that provides concentrated oxygen through transdermal application, allowing simultaneous mechanical and chemical treatment of wounds
Solution Approach 2:
The integrated wound care apparatus is designed to perform multiple functions: it can apply negative pressure for drainage, deliver transdermal oxygen for healing promotion, and potentially switch between different treatment modes. This multi-functional design allows the same device to effectively treat various wound types including infected or stalled wounds that would respond differently to each treatment modality
2Duration of action of moving object
If oxygen concentrating device operates continuously, then transdermal oxygen therapy is improved, but voltage increases after 15 days indicating degradation
Solution Approach 1:
The patent incorporates a control system that monitors the voltage across the MEA and adjusts the electrical current accordingly. When voltage increases indicating MEA degradation, the control system reduces the current to maintain stable operation. This feedback mechanism allows the device to operate continuously while compensating for natural degradation, maintaining both duration and reliability
Solution Approach 2:
The system dynamically adjusts the electrical current applied to the MEA based on real-time voltage measurements. Rather than operating at a fixed current level, the system modulates the current to account for MEA aging and degradation, enabling sustained operation over extended periods while maintaining voltage stability within acceptable ranges
3Reliability
If cover restricts moisture loss from MEA, then operational stability is improved, but oxygen production efficiency may be affected
Solution Approach 1:
The cover is designed with selective permeability or localized openings that restrict moisture loss from the MEA while maintaining adequate oxygen supply. Rather than completely sealing the MEA, the cover provides localized protection where needed while allowing gas exchange in other areas, balancing moisture retention with oxygen production efficiency
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 device provides simultaneous and intermittent application of transdermal oxygen and NPWT, enhancing wound healing by accelerating angiogenesis and reducing edema, while maintaining operational stability and efficiency over extended periods.
Implementation Method 1
The first MEA may include a first ion conducting membrane positioned between the first and second electrodes. The application of a constant electrical current through the first conductive wire and the second conductive wire may electrochemically produce oxygen on the second electrode from ambient air
Implementation Method 2
The first MEA may include a first ion conducting membrane positioned between the first and second electrodes
Implementation Method 3
a pump may be connected via a tube to the dressing to evacuate air from the dressing and draw drainage from the wound
Data Source
AI summary
A wound care device for delivering topical oxygen therapy, negative pressure wound therapy, and a low intensity vacuum therapy for treatment of a wound. The wound care device may include an oxygen supply MEA, an oxygen consuming MEA, a vacuum pump and motor, a pressure sensor, and a power supply and electronic controls. A dressing may be connected to the wound care device for administering topical continuous oxygen therapy and simultaneous negative pressure wound therapy to a wound. A canister or exudate trap may be positioned between the dressing and the vacuum supply port of the vacuum pump to collect and store exudates from the wound. The canister may be combined with the dressing.