Flexible Overlay for Reduced Pressure Wound Sealing
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Solution Overview
Problem
Current reduced pressure wound treatment systems face challenges such as discomfort due to adhesive use, difficulty in adapting to changing wound shapes, and inefficiency in maintaining consistent pressure, especially when tissue swelling decreases, leading to increased treatment time and costs.
Innovation Solution
A flexible, impermeable overlay that collapses to form a hermetic seal with the body, allowing for reduced pressure application without adhesives, and is designed to adapt to changing body contours, providing a visual indication of pressure loss and reducing the need for frequent changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If adhesive is used to seal the cover to surrounding tissue, then the cover can be securely attached, but tissue discomfort and pain occur as swelling decreases and the adhesive stretches the tissue
Solution Approach 1:
The patent removes the adhesive component from the sealing system entirely. Instead of using adhesive to seal the cover to surrounding tissue, the system relies on the reduced pressure itself to maintain the seal, eliminating the source of tissue discomfort and pain while preserving seal reliability
Solution Approach 2:
The patent replaces the chemical bonding mechanism (adhesive) with a mechanical sealing mechanism where the flexible cover conformally contacts the tissue and is held in place by the reduced pressure differential, substituting a harmful chemical-mechanical system with a benign purely mechanical system
2Reliability
If rigid or semi-rigid covers are used to maintain reduced pressure, then pressure stability is improved, but the covers do not adapt to changing body contours as swelling decreases
Solution Approach 1:
The patent employs a flexible cover that dynamically adapts its shape to match changing body contours as swelling decreases during the healing process. The flexibility allows continuous adaptation while the reduced pressure system maintains pressure stability, resolving the contradiction between rigidity for pressure control and flexibility for adaptation
Solution Approach 2:
The patent uses a flexible thin-film cover that can conformally contact the body surface and adapt to changing contours. This flexible shell maintains pressure stability through the reduced pressure differential while simultaneously adapting to tissue changes, eliminating the need for rigid structures
3Reliability
If adhesive seal is used on the wound cover, then the cover can be sealed to tissue, but the seal breaks when exudate from the wound accumulates
Solution Approach 1:
The patent removes the adhesive seal that is vulnerable to breaking from exudate. By eliminating the adhesive component and relying instead on the flexible cover's conformal contact and the reduced pressure differential, the system achieves seal integrity that is not compromised by wound exudate accumulation
Solution Approach 2:
The flexible cover itself acts as an intermediary between the reduced pressure system and the wound environment. It provides a seal that is insensitive to exudate while transmitting the reduced pressure effect to the wound, mediating between pressure control and wound exposure protection
4Object-affected harmful factors
If rigid covers are used with padding to prevent pressure on surrounding tissue, then patient comfort is improved, but the complexity and cost of the system increases
Solution Approach 1:
The patent uses a flexible thin-film cover that naturally conforms to the body surface without requiring additional padding. The flexibility allows the cover to adapt to tissue contours, distributing pressure appropriately without adding structural complexity or cost
Solution Approach 2:
The flexible cover is self-adapting to body contours through its material properties alone, without requiring external padding or complex adjustment mechanisms. The system serves itself by using the inherent flexibility of the cover to prevent undue pressure on surrounding tissue
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 solution enables faster healing, reduces bacterial density, enhances flap and graft attachment, and decreases treatment time and costs by providing a comfortable, adaptable, and visually monitored reduced pressure treatment system.
Implementation Method 1
maintain reduced pressure under the flexible overlay when reduced pressure is supplied to a volume under the flexible overlay in the area of the wound
Implementation Method 2
The flexible overlay collapses in the approximate direction of the area of the wound to be treated when reduced pressure is supplied to the volume under the flexible overlay
Data Source
AI summary
A wound treatment appliance is provided for treating all or a portion of a wound. In some embodiments, the appliance comprises an impermeable flexible overlay that covers all or a portion of the wound for purposes of applying a reduced pressure to the covered portion of the wound. In other embodiments, the wound treatment appliance also includes a vacuum system to supply reduced pressure to the wound in the area under the flexible overlay. In yet other embodiments, the wound treatment appliance also includes wound packing means to prevent overgrowth of the wound or to encourage growth of the wound tissue into an absorbable matrix comprising the wound packing means. In still other embodiments, the appliance may include a suction drain. In other embodiments, the appliance may include a collection chamber to collect and store exudate from the wound. In yet other embodiments, a suction bulb may be used to provide a source of reduced pressure to an impermeable overlay that covers all or a portion of the wound. Finally, methods are provided for using various embodiments of the wound treatment appliance.