Negative Pressure Wound Therapy Activation With Skin Contact Sensing
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Solution Overview
Problem
Existing negative pressure wound therapy systems lack effective mechanisms to ensure intentional activation and prevent unintentional operation, particularly during transportation or manufacturing, and fail to optimize power consumption based on energy availability.
Innovation Solution
A wound dressing integrated with sensors and control circuitry that confirms contact with skin before activating negative pressure and adjusts power consumption based on energy levels, including features like end-of-life timers and pressure differential monitoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If negative pressure is activated without skin contact detection, then the device can be simpler and easier to operate, but unintentional activation during transportation or manufacturing may occur causing harmful effects
Solution Approach 1:
The system performs skin contact detection before activating negative pressure therapy. The controller checks whether the wound dressing is in contact with skin prior to allowing therapy activation, preventing unintentional activation during transportation or manufacturing while maintaining simple operation when properly applied
Solution Approach 2:
A sensor acts as an intermediary between the user interface and the negative pressure source. The sensor detects skin contact and provides this information to the controller, which uses it to control activation of the negative pressure source, thereby mediating between simple user input and safe therapy delivery
2Use of energy by moving object
If the device continuously monitors and adjusts power consumption, then energy efficiency is improved, but device complexity increases
Solution Approach 1:
The device dynamically adjusts its power consumption based on available energy. The controller monitors energy availability and modifies operational parameters accordingly, transitioning between different power consumption states to optimize energy usage while maintaining essential functions
Solution Approach 2:
The system implements periodic monitoring of energy levels and adjusts operations in discrete phases. Rather than continuous complex control, the device checks energy status at intervals and makes appropriate adjustments to therapy delivery and monitoring functions
3Reliability
If the device provides continuous negative pressure therapy, then treatment effectiveness is improved, but power consumption increases reducing operational duration
Solution Approach 1:
The negative pressure therapy is delivered in periodic cycles rather than continuously. The controller activates the negative pressure source for therapeutic periods, then allows pressure equalization periods, maintaining treatment effectiveness while reducing average power consumption to extend operational duration
Solution Approach 2:
The system changes operational parameters based on energy availability. When energy is abundant, continuous or frequent therapy cycles are provided; when energy is limited, the system adjusts therapy intensity, duration, or frequency to balance effectiveness with power conservation
Data Source
AI summary
Embodiments of negative pressure wound therapy systems and methods are disclosed. In one embodiment, an apparatus includes a wound dressing, negative pressure source, user interface, sensor, and control circuitry. The user interface can receive an activation input. The sensor can detect whether the wound dressing is positioned over a wound. The control circuitry can cause supply of negative pressure in response to receipt of the activation input and a determination that the sensor detects that the wound dressing is positioned over the wound. In addition, the control circuitry can prevent supply of negative pressure in response to a determination that the sensor does not detect that the wound dressing is positioned over the wound.