Dual-Pump Negative-Pressure Wound Therapy for Suction Flow
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Solution Overview
Problem
Miniaturized negative-pressure wound therapy apparatuses face challenges with insufficient suction flow rates and storage capacity, making it difficult to maintain effective negative pressure and exudate management in wound regions.
Innovation Solution
The apparatus incorporates a dual-pump system where a first miniaturized pump with a lower suction flow rate is used for typical applications, and a second pump with a higher suction flow rate is attached as needed, along with a dual-storage system to ensure sufficient capacity, and includes a piezoelectric pump for compactness and a cleaning solution conduit for efficient wound cleaning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the pump device is miniaturized, then the portability and ease of carrying are improved, but the suction flow rate is reduced
Solution Approach 1:
The system dynamically switches between two pump devices based on operational needs. The first pump device (miniaturized) is used for typical portable applications, while the second pump device (higher flow rate) is activated when high suction flow rate is required, making the system adaptable rather than static
Solution Approach 2:
The system changes the operational parameter (suction flow rate) by switching between two different pump devices with different characteristics. This allows the system to adjust its performance parameters based on the specific wound therapy requirements without being constrained by a single fixed design
2Volume of moving object
If the storage portion is miniaturized, then the device compactness is improved, but the exudate storage capacity is reduced
Solution Approach 1:
The storage system is segmented into two separate storage portions: a first storage portion integrated with the miniaturized pump device for typical use, and a second storage portion that can be attached when large-volume exudate collection is needed. This segmentation allows each component to be optimized for its specific function while providing overall system flexibility
3Device complexity
If a single pump device is used, then the device complexity is reduced, but the adaptability to different wound therapy needs is limited
Solution Approach 1:
The system achieves multi-functionality by incorporating two pump devices that can operate independently or together. The first pump device handles typical low-flow applications, while the second pump device provides high-flow capability when needed, making the system universal enough to handle diverse wound therapy scenarios without requiring completely different devices
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
This configuration allows for adequate suction flow rates and storage capacity as required, ensuring effective negative pressure application and exudate management, even with a miniaturized design, and enables efficient wound cleaning with a sufficient flow rate and storage capacity.
Implementation Method 1
a piezoelectric pump that includes a piezoelectric element and a diaphragm joined to the piezoelectric element. When an alternating voltage is applied to the piezoelectric element, the piezoelectric element repeats expansion and contraction along the plane directions of the principal surface
Implementation Method 2
a pump device for sucking gas from a closed space defined by the wound dressing and the wound region
Data Source
AI summary
Provided is a negative-pressure wound therapy apparatus capable of causing negative pressure in a closed space defined by a wound dressing and a wound region with a sufficient suction flow rate as needed even with a miniaturized pump device. In atypical use that needs a high suction flow rate, because a pump device (30) with a high suction flow rate is attached to a wound dressing (10) and sucks gas from a closed space (904) defined by a wound region (903) and the wound dressing (10), even when a pump device (20) for typical use is miniaturized and the suction flow rate of the pump device (20) is reduced, a therapy apparatus (100) can achieve a suction flow rate sufficient for atypical use. Thus, the pressure value in the closed space (904) can decrease to a desired value more quickly.