Piezoelectric Pump for Portable Negative Pressure Wound Therapy
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Solution Overview
Problem
Current negative pressure wound therapy devices are expensive, large, and require external power, making them unsuitable for home use and limiting patient mobility.
Innovation Solution
A portable negative pressure wound therapy device with a compact design, integrated power source, and a dressing system that includes a pump, aspiration conduit, and a canister for liquid collection, featuring a voltage-actuated deformation element and liquid-full probes for accurate fluid detection, ensuring safe and effective wound treatment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional negative pressure wound therapy device is used, then wound healing can be accelerated, but the device is expensive and cannot be afforded by ordinary patients
Solution Approach 1:
The patent employs disposable components such as the dressing assembly and pump to reduce overall device cost. The pump is designed as a single-use component that can be discarded after a certain number of operations or when battery power is depleted, eliminating the need for expensive reusable mechanisms and sterilization systems.
Solution Approach 2:
The device incorporates automatic functions including sensor-based wound depth measurement, automated pump operation based on wound status detection, and intelligent power management. These self-service features reduce the need for expensive manual operation systems and professional monitoring equipment.
2Reliability
If a traditional negative pressure wound therapy device is used, then wound therapy can be provided, but the device is large and requires external power supply, making it impossible to carry
Solution Approach 1:
The patent integrates multiple functions into a single compact unit: the pump, battery power supply, control circuitry, and dressing assembly are merged into one portable device. This consolidation eliminates the need for external power supplies and multiple separate components, making the device carryable by patients.
Solution Approach 2:
The device uses a flexible battery-powered pump with adjustable operation modes (continuous or intermittent pumping) that can adapt to different wound conditions. The dynamic power management system adjusts pump operation based on battery status and wound requirements, optimizing both portability and therapy effectiveness.
3Ease of operation
If a portable negative pressure wound therapy device is designed, then patient mobility can be improved, but the device complexity increases
Solution Approach 1:
The patent replaces complex mechanical measurement systems with electronic sensors and optical detection methods. Wound depth and status are measured using sensors and imaging techniques rather than manual mechanical probes, simplifying the overall device structure while maintaining portability.
Solution Approach 2:
The device incorporates feedback mechanisms where sensors continuously monitor wound status and automatically adjust pump operation parameters. This closed-loop control system simplifies user interaction while maintaining complex therapeutic functions, as the device self-regulates based on real-time wound conditions.
4Reliability
If accurate liquid detection is implemented in the canister, then wound therapy safety is improved, but the device complexity increases
Solution Approach 1:
The patent uses optical intermediaries such as light sources and photodetectors to sense liquid levels in the canister. Instead of direct electrical contact sensors that would complicate the design, optical fields serve as intermediaries to detect liquid presence and levels, simplifying the detection system while improving safety.
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 device provides affordable, portable, and effective wound therapy, accelerating healing, reducing edema, and preventing infection, allowing patients to manage their wounds at home with improved mobility.
Implementation Method 1
The pump further comprises a voltage-actuated deformation element to push the fluid from the aspiration end to the discharge end
Implementation Method 2
The pump discharges fluid from the discharge end to generate negative pressure at the aspiration end
Implementation Method 3
the at least one liquid-full probe generates a liquid-full signal to the control circuit board when the at least one liquid-full probe contacts the liquid aspirated from the wound
Data Source
AI summary
The present invention relates to a negative pressure wound therapy device, system and method. The negative pressure wound therapy device is connected with a dressing, and comprises a housing, a control circuit board, a pump, and an aspiration conduit. The pump generates negative pressure. The pump may comprise a voltage-actuated deformation element (such as piezoelectric vibration element) to push fluid from an aspiration end to a discharge end. The aspiration conduit has a pump end and a dressing end. The pump end is fluidly connected to the aspiration end of the pump, and the dressing end is fluidly connected to the dressing used for covering a wound. The control circuit board is disposed in the housing, controls the pump to generate the negative pressure in the aspiration conduit, and applies negative pressure to the wound covered by the dressing via the aspiration conduit.