External Control Circuitry for Mobile NPWT Pump Safety
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Solution Overview
Problem
Existing NPWT devices lack adequate measures to swiftly terminate operation when they start to function outside of a predefined operational range, potentially leading to unsafe conditions for the patient.
Innovation Solution
The NPWT device is equipped with external control circuitry that is independent of the control unit, allowing it to directly receive inputs from sensors and terminate the operation of the negative pressure pump if the device operates outside of the predefined range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the NPWT device is operated in a home environment without professional monitoring, then the ease of operation is improved, but the reliability deteriorates due to potential operational errors and lack of monitoring
Solution Approach 1:
The NPWT device incorporates self-monitoring capabilities through control circuitry that automatically detects operational parameters such as negative pressure levels, pump runtime, and alarm conditions. The system performs self-diagnostics and can autonomously terminate operation when predefined safety thresholds are exceeded, enabling unmonitored home use while maintaining reliability through automated safety mechanisms.
2Device complexity
If the control unit is designed to be highly integrated and efficient, then the device complexity is reduced, but the reliability deteriorates because a single point of failure can cause system-wide failure
Solution Approach 1:
The control system is segmented into distinct functional modules: control circuitry for monitoring operational parameters, a control unit for system coordination, and separate safety mechanisms including external control circuitry that can independently terminate pump operation. This modular segmentation allows the system to maintain low overall complexity while improving reliability through functional independence and failure isolation.
3Productivity
If the NPWT device operates continuously without external monitoring, then the productivity is improved, but the safety deteriorates due to inability to detect and respond to operational failures
Solution Approach 1:
The NPWT device incorporates continuous feedback mechanisms where control circuitry monitors operational parameters such as negative pressure levels, pump runtime, and system status. This feedback is processed by the control unit which can automatically adjust operations or terminate the therapy when predefined safety thresholds are exceeded, enabling continuous operation while maintaining patient safety through automated monitoring and response.
4Ease of operation
If the control unit is made highly responsive to user interface commands, then the ease of operation is improved, but the reliability deteriorates because software/firmware failures can prevent proper response to safety conditions
Solution Approach 1:
External control circuitry acts as an intermediary safety mechanism between the control unit and the negative pressure pump. This independent hardware layer can directly terminate pump operation based on monitored parameters without requiring control unit processing, providing a fail-safe mechanism that operates independently of software/firmware reliability while maintaining ease of use through automated safety responses.
Data Source
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AI summary
The present disclosure generally relates to a mobile negative pressure wound therapy (NPWT) device comprising a negative pressure pump, where the NPWT device is adapted to ensure that an operation of the negative pressure pump is terminated if the NPWT device is operating outside of a predefined operational range. The present disclosure also relates to a corresponding method for operating such an NPWT device and a thereto related computer program product.