Negative Pressure Wound Therapy Power Scaling for Extended Operation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing negative pressure wound therapy (NPWT) systems face challenges in maintaining optimal operation due to power source depletion, leading to potential system malfunction and inadequate negative pressure levels, without effective mechanisms to extend operational time and ensure reliable therapy delivery.
Innovation Solution
A wound dressing integrated with a power source, boost converter circuitry, and a controller that monitors power capacity, adjusting power output levels and transitioning to lower pressure settings or non-operational states when capacity is depleted, ensuring consistent negative pressure therapy until the power source is exhausted.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the power source operates at high power levels to maintain optimal negative pressure, then the quality of wound therapy is improved, but the operational time of the system is reduced
Solution Approach 1:
The system dynamically adjusts the power output of the vacuum pump based on the remaining power source capacity. When the power source is fully charged, the pump operates at optimal power levels to maintain effective negative pressure for quality wound therapy. As the power source capacity decreases, the controller automatically reduces the pump power consumption, transitioning from optimal therapy mode to extended operation mode, ensuring the system operates as long as possible while maintaining adequate therapy levels.
Solution Approach 2:
The controller monitors the power source capacity and changes the operating parameters of the vacuum pump accordingly. This includes adjusting the power consumption levels and negative pressure thresholds based on the remaining power source capacity, enabling the system to adapt its performance characteristics to extend operational time while maintaining acceptable therapy quality.
2Reliability
If the system maintains optimal negative pressure levels continuously, then the effectiveness of wound therapy is improved, but the power source depletes faster
Solution Approach 1:
The system applies partial action by reducing the negative pressure threshold as power source capacity decreases. Instead of maintaining the optimal negative pressure level throughout the entire operational period, the controller allows the system to operate with reduced pressure effectiveness when power is limited, thereby conserving energy and extending operational time while still providing beneficial wound therapy.
Solution Approach 2:
The system dynamically adjusts power consumption based on real-time monitoring of power source capacity. The controller modulates the vacuum pump operation to match the available power, transitioning from continuous optimal performance to extended operation with reduced power consumption, ensuring the system adapts its energy usage to available resources.
3Duration of action of moving object
If the system reduces power consumption to extend operational time, then the duration of operation is improved, but the negative pressure levels become inadequate
Solution Approach 1:
The system implements dynamic operation where the negative pressure levels and power consumption are continuously adjusted based on power source capacity. This enables the system to provide optimal negative pressure during periods of sufficient power, then transition to extended operation with reduced pressure levels when power is depleted, maximizing both operational duration and therapeutic effectiveness throughout the treatment cycle.
Solution Approach 2:
The controller changes the operating parameters of the vacuum pump based on power source status, adjusting both power consumption and negative pressure output levels. This parameter adaptation allows the system to extend operational time by operating at reduced pressure thresholds when power is limited, while maintaining adequate therapeutic pressure levels when power is sufficient.
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 extends the operational time of NPWT by dynamically managing power consumption, maintaining effective negative pressure levels, and providing reliable wound therapy until the power source is depleted, preventing system failure and ensuring smooth transition to an end-of-life state.
Implementation Method 1
boost converter circuitry configured to receive power at a first level from the power source and output power at a second level to the source of negative pressure, the second level being higher than the first level
Implementation Method 2
source of negative pressure configured to aspirate fluid from the wound
Implementation Method 3
source of negative pressure configured to aspirate fluid from the wound
Data Source
AI summary
A negative pressure wound therapy system can include a source of negative pressure negative pressure configured to aspirate fluid from a wound covered by a wound dressing and electronic circuitry with a power source, boost converter circuitry configured to receive power at a first level from the power source and supply power at a second level to the source of negative pressure, the second level being higher than the first level, and a controller configured to, in response to a determination that a capacity of the power source is being depleted, cause the boost converter circuitry to supply power to the source of negative pressure at a third level lower than the second level. The controller can further lower a target negative pressure level associated with negative pressure provided by the source of negative pressure.