NPWT Prepulse Signal Mitigates Pump Noise Startle
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Solution Overview
Problem
Negative pressure wound therapy (NPWT) devices generate noise during operation, causing discomfort and disturbance to patients and their partners, particularly when used in home environments.
Innovation Solution
An NPWT apparatus with control circuitry that emits a prepulse signal, either audible or tactile, prior to activation of the negative pressure source to reduce the startle response and discomfort associated with the noise generated by the device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the negative pressure pump is activated to provide wound therapy, then the wound healing effect is improved, but noise is generated that disturbs the patient and partner
Solution Approach 1:
The system performs preliminary action by emitting a prepulse signal (audible sound or tactile vibration) before activating the negative pressure pump. This prepulse warns the patient's auditory system in advance, reducing the startle response to the subsequent pump noise, thereby maintaining wound healing effectiveness while reducing noise disturbance.
2Ease of operation
If the NPWT device is used in home environment, then patient convenience is improved, but noise discomfort increases for patient and partner
Solution Approach 1:
The prepulse signal is emitted before pump activation to preemptively warn the auditory system, reducing the startling effect of noise during home use. This enables comfortable nighttime and quiet-hour therapy while maintaining ease of operation in home settings.
Solution Approach 2:
The prepulse signal acts as an intermediary between the pump activation and the patient's auditory perception. It mediates the transition by providing advance warning, allowing the patient's system to adjust and reducing the perceived harshness of the pump noise during home therapy.
3Reliability
If the pump operates continuously for wound therapy, then therapeutic effect is maintained, but patient sleep quality deteriorates due to noise
Solution Approach 1:
The system emits a prepulse signal before activating the pump during nighttime therapy sessions. This preliminary warning reduces the startle response that would otherwise disrupt sleep, enabling continuous therapeutic effect while preserving sleep quality through the prepulse mitigation mechanism.
Data Source
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AI summary
An apparatus and related aspects for providing reduced pressure to a tissue site are disclosed. The apparatus comprises a source of negative pressure configured to provide negative pressure via a fluid flow path from an inlet of the source of negative pressure to a wound dressing. The apparatus further comprises control circuitry configured to control operation of the source of negative pressure. The control circuitry is further configured to generate a signal so to cause the apparatus or an external handheld device to emit a signal comprising an audible sound and/or a tactile signal to a user of the apparatus during a time period prior to activation of the source of negative pressure.