Integrated NPWT Dressing with Isolation Circuit for Safe Sterilization
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Solution Overview
Problem
Current negative pressure wound therapy (NPWT) systems are cumbersome due to remote placement of the negative pressure source, requiring cumbersome tubing and making it difficult to position comfortably and conveniently, especially with wound exudate causing issues for electronic integration.
Innovation Solution
A self-contained NPWT system with a micropump and electronic circuit integrated into the wound dressing, featuring a latching circuit for safe sterilization and two-step activation to prevent accidental power-up during sterilization, allowing for direct application and operation without external components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the negative pressure source is placed remotely from the wound dressing, then the system can be operated, but the system becomes cumbersome and difficult to position comfortably and conveniently
Solution Approach 1:
The patent integrates the negative pressure source directly into the wound dressing, merging previously separate components (dressing and pump) into a single unified device. This eliminates the need for external pumps and tubing, making the system self-contained and much easier to position and operate without the complexity of remote components.
Solution Approach 2:
The integrated design makes the wound dressing self-sufficient by incorporating all necessary components including the negative pressure source, power source, and control circuitry within the dressing itself, eliminating the need for external support mechanisms or tubing connections.
2Device complexity
If electronic components are integrated into the wound dressing, then the system becomes self-contained, but sterilization becomes hazardous due to potential energy release during sterilization gas exposure
Solution Approach 1:
The patent implements a two-step activation process where the electronic circuit is first placed in a preliminary state (first state) before sterilization, preventing power application to energy-storing components during exposure to sterilization gas. After sterilization, a second activation step (second state) safely enables power application, eliminating the hazard while maintaining integration benefits.
Solution Approach 2:
The control circuit acts as an intermediary between the power source and energy-storing components, mediating power application based on the activation state. This intermediary control mechanism prevents direct power application during sterilization, safely enabling integration of electronic components while maintaining sterilization safety.
3Productivity
If power is continuously supplied to the electronic circuit, then the system is ready for operation, but accidental power-up during sterilization can cause energy release and overheating
Solution Approach 1:
The patent implements a two-step activation process where the electronic circuit is first placed in a preliminary state (first state) before sterilization, preventing power application to energy-storing components during exposure to sterilization gas. After sterilization, a second activation step (second state) safely enables power application, eliminating the hazard while maintaining integration benefits.
Solution Approach 2:
The control circuit is configured to preliminarily prevent power application to energy-storing components during the sterilization process by maintaining the first activation state. This preliminary anti-action counteracts the potential harmful effect of accidental power-up and energy release, ensuring safe sterilization while maintaining operational readiness after sterilization.
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
Enhances convenience and comfort by eliminating the need for external pumps and tubing, while ensuring safe and effective sterilization of integrated systems, promoting wound healing through controlled negative pressure application.
Implementation Method 1
an isolation circuit configured to prevent power from being applied to energy-storing components of the electronic circuit when the apparatus is exposed to sterilization gas
Implementation Method 2
a pump assembly comprising a voice coil, a magnet and a diaphragm, wherein the voice coil is configured to move the diaphragm to pump a fluid through the pump assembly in response to a drive signal applied to the voice coil
Implementation Method 3
connecting a source of negative pressure (such as a vacuum pump) to the cover in a manner so that negative pressure is created and maintained under the cover
Implementation Method 4
The electronic circuit can include at least one capacitor configured to store energy supplied by the power source and provide the stored energy to the source of negative pressure
Data Source
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AI summary
Disclosed herein are systems and methods for safe operation of a wound treatment apparatus with electronic components integrated on or within a wound dressing. In some embodiments, the electronic components include a power source, an isolation circuit, a controller, a capacitor, and a negative pressure source. The isolation circuit provides multiple activation states with at least one state preventing application of power to the other electronic components capable of storing electrical energy, thereby providing a safe operation of the apparatus. For example, sterilization of the apparatus can be performed safely.