Portable Wound Canister Venting for Orientation-Independent Suction
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Solution Overview
Problem
Conventional subatmospheric pressure wound therapy systems face issues with leaks and require upright positioning, leading to inefficiency and odor/wetness problems, especially in portable units.
Innovation Solution
A portable wound therapy system with a collection canister that includes a hydrophobic membrane and attitude-independent design, allowing the canister to be positioned on its side or inverted without affecting operation, and a hydrophobic filter to prevent fluid from blocking suction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional subatmospheric pressure wound therapy systems are used, then wound healing is promoted through suction and fluid removal, but the systems require upright positioning and suffer from leaks and odor issues
Solution Approach 1:
The patent inverts the conventional approach by placing the hydrophobic membrane at the bottom of the canister rather than at the top, and by designing the canister to be filled from the bottom up. This inversion allows the system to function in any orientation because the hydrophobic membrane remains in constant contact with the wound dressing regardless of canister position, eliminating the upright positioning requirement while maintaining suction effectiveness
Solution Approach 2:
The hydrophobic membrane acts as an intermediary element between the wound dressing and the vacuum source. It selectively allows air to pass through while blocking wound exudate, thereby maintaining the vacuum seal and preventing leaks and odors without requiring the canister to be in a specific orientation
2Loss of substance
If conventional wound therapy systems are used, then fluid is removed from the wound, but leaks and odor problems occur
Solution Approach 1:
The patent employs a hydrophobic membrane with microporous structure that allows gas molecules to pass through while blocking larger liquid droplets. This porous material enables continuous fluid removal from the wound while preventing leaks and odors by blocking the passage of wound exudate, solving the harmful effects without compromising the primary function
3Adaptability or versatility
If portable wound therapy systems are used, then patient mobility is improved, but the systems are prone to leaks and require complex positioning
Solution Approach 1:
By inverting the canister design to fill from the bottom and position the hydrophobic membrane at the base, the system becomes orientation-independent. This allows the portable unit to be carried or positioned in any orientation without compromising the vacuum seal or causing leaks, thereby maintaining reliability while enabling patient mobility
Solution Approach 2:
The hydrophobic membrane automatically adjusts to the canister's orientation and maintains the vacuum seal without requiring active control or positioning adjustments by the user. The membrane's hydrophobic properties cause it to self-seal around the wound dressing interface regardless of canister position, providing leak prevention that is independent of orientation
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 maintains effective fluid removal and suction regardless of orientation, enhancing wound healing by promoting blood flow and tissue migration while preventing leaks and odor issues.
Implementation Method 1
The container may include a hydrophobic membrane that allows gas to escape from the collection bag
Implementation Method 2
A portable system for subatmospheric pressure therapy... a control unit adapted to draw a vacuum
Data Source
AI summary
A portable system for subatmospheric pressure therapy in connection with healing a surgical wound, including a wound dressing dimensioned for positioning relative to a wound bed of a subject and a subatmospheric pressure mechanism dimensioned to be carried or worn by the subject. The subatmospheric pressure mechanism includes a housing having a control unit adapted to draw a vacuum and a canister associated with the housing. The canister has a collection bag disposed therein, which is in fluid communication with the wound dressing to receive exudates from the wound bed. The collection bag is adapted to expand upon receipt of the fluids and has means to release gas from within the collection bag in connection with operation of the control unit. With this arrangement, the canister is attitude independent, i.e., the canister may be positioned on edge, on its side or on its end etc. while still maintaining operation of the control unit. The collection bag may include a hydrophobic vent or material for releasing the gases. In another embodiment, the collection bag comprises a gas permeable material. The collection bag may include one of pleats or bellows.