Piezoelectric Pump Feedback for NPWT Fluid Contamination Detection
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Solution Overview
Problem
Existing negative pressure wound therapy (NPWT) devices lack effective mechanisms to detect fluid contamination, which can damage internal components if not addressed promptly.
Innovation Solution
Incorporating a piezo-electric pump in parallel with the diaphragm pump to monitor fluid contamination through feedback signals, allowing the controller to cease operation of the diaphragm pump and alert caregivers when fluid is detected, thereby preventing damage to the NPWT device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a piezo-electric pump is added in parallel to detect fluid contamination, then the reliability of fluid detection is improved, but the device complexity increases
Solution Approach 1:
A piezo-electric pump is introduced as an intermediary sensing device in parallel with the diaphragm pump. This piezo-electric pump acts as a mediator that detects fluid contamination through its electrical feedback signals without interfering with the primary therapeutic function of the diaphragm pump, thus improving detection reliability while maintaining system modularity
Solution Approach 2:
The system utilizes electrical feedback signals from the piezo-electric pump to detect fluid contamination. The controller monitors these feedback signals to determine pump status and detect contamination events, enabling automatic response without requiring additional complex sensing mechanisms
2Reliability
If the diaphragm pump is shut off upon detecting fluid contamination, then the damage to components is prevented, but the productivity of wound therapy is reduced
Solution Approach 1:
The system applies preliminary anti-action by detecting fluid contamination through the piezo-electric pump's feedback signals and proactively shutting off the diaphragm pump before fluid can cause damage to internal components. This preventive shutdown protects the pump and associated components from fluid-related damage while the system alerts the user to address the contamination issue
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 detects fluid contamination, preventing damage to NPWT device components and reducing repair costs and time, while ensuring continued operation and safety.
Implementation Method 1
a piezo-electric pump for fluid detection that is fluidly coupled in parallel with the diaphragm pump
Data Source
Figure 1A
Figure 1B
Figure 2
AI summary
A negative pressure wound therapy (NPWT) system includes a therapy unit (102), a first pump (112), a piezo-electric pump (116), and a controller (202). The first pump (112) is configured to draw a negative pressure at a wound site (105) through a first tubular member (122). The piezo-electric pump (116) is fluidly coupled with the first tubular member (122) through a bypass tubular member (124) and is configured to detect a fluid indication. The controller (202) includes processing circuitry configured to obtain feedback signals from the piezo-electric pump (116) and determine if fluid is present at the piezo-electric pump (116) based on the feedback signals.