Wound Drainage Enclosure with Segmented Vacuum Pump
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Solution Overview
Problem
Current negative pressure wound drainage systems face contamination issues due to pump suction, require bulky canisters for exudate collection, and complex pressure monitoring, and are inconvenient for ambulatory patients.
Innovation Solution
A wound drainage enclosure with bleeding holes to allow ambient air entry, a disposable two-chambered diaphragm vacuum pump system, and a collapsible waste collection bag that separates gases and liquids, enabling indirect pressure monitoring without direct fluid connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If a sealed wound enclosure is used to maintain negative pressure, then negative pressure is effectively maintained, but the system requires complex pressure relief valves and monitoring devices that are subject to contamination
Solution Approach 1:
The system divides the enclosure into multiple sealed chambers that can be independently evacuated. Each chamber can be sealed and evacuated separately, allowing complex pressure control to be broken down into simpler, independent operations without requiring complex monitoring devices
Solution Approach 2:
The invention removes the need for complex pressure relief valves and monitoring devices by using a different approach - the pump itself controls pressure cycling by alternating between chambers. The complexity of pressure monitoring is extracted from the system entirely, replacing it with a simpler pump control mechanism
2Stress or pressure
If pump suction is used to create negative pressure, then negative pressure is effectively generated, but the pump is subject to contamination from wound exudate
Solution Approach 1:
The system segments the vacuum generation process into separate chambers that are evacuated sequentially rather than simultaneously. The pump connects to different chambers at different times, which prevents continuous exposure to wound exudate and reduces contamination risk while maintaining effective negative pressure generation
Solution Approach 2:
The pump operates in periodic cycles, alternating between evacuating different chambers. During each cycle, the pump connects to one chamber while other chambers are sealed or being evacuated. This periodic action reduces the pump's exposure time to contaminants while maintaining the necessary negative pressure
3Quantity of substance
If a rigid canister is used to collect wound exudate, then collection capacity is sufficient, but the system becomes bulky and inconvenient for ambulatory patients
Solution Approach 1:
The invention replaces rigid canisters with flexible collection bags made of thin, collapsible material. These flexible containers can be compressed as they fill, maintaining a compact form factor while providing sufficient collection capacity. The flexible nature allows the system to remain lightweight and portable for ambulatory patients
4Stress or pressure
If the wound enclosure is sealed airtight, then negative pressure is maintained, but exudate may coagulate and occlude the connecting tube
Solution Approach 1:
The system segments the enclosed space into multiple chambers separated by sealed barriers. Exudate collects in one chamber while the pump evacuates another chamber, creating spatial separation between the exudate collection zone and the vacuum generation zone. This prevents exudate from contacting and occluding the tube connection to the pump
Solution Approach 2:
The invention introduces sealed chambers as intermediary spaces between the wound area and the pump. Exudate is collected in one chamber while the pump operates on another chamber, using the chamber separation as an intermediary mechanism to prevent direct contact between exudate and pump components, thereby eliminating tube occlusion risk
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 prevents contamination, reduces bulkiness, and simplifies pressure control, making it safer and more convenient for ambulatory patients by allowing controlled exudate removal and cyclic pressure application.
Implementation Method 1
negative pressure applied to a wound enhances drainage of fluids or exudate from the wound
Implementation Method 2
the flow into the pump is likely to contaminate the pump
Implementation Method 3
One or more bleeding holes are provided in the enclosure or adjacent to its outlet such that ambient air can enter the tube and flow together with the exuded liquids when negative pressure is present
Data Source
AI summary
The invention relates to a tilt and slide cover in a vehicle roof. The tilt and slide cover comprises a cover and a frame, which is supported in lateral guides of a roof opening. The special feature of the tilt and slide cover lies in the fact that the cover is arranged relatively moveable in relation to the frame and can be locked to and released from this. The frame comprises a plastic section, into which the slide guide and other fittings such as slide cheek holders or the like can be integrated in one piece. It is also possible to fix the rear water collection channel directly on the frame.