Canisterless Wound Dressing Pump for Negative Pressure Exudate Control
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Solution Overview
Problem
Existing wound dressings for negative pressure therapy (TNP) systems face challenges in efficiently managing wound exudates and maintaining optimal healing conditions, particularly for hard-to-heal wounds, while minimizing external disturbances and bacterial contamination.
Innovation Solution
A dressing kit with a canisterless pump assembly, integrated absorbent layers, and a porous transmission layer, which includes a superabsorbent material and a gas-impermeable cover layer, allows for effective fluid management and maintenance of negative pressure, promoting wound healing by reducing tissue edema, encouraging blood flow, and minimizing infection risk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a pump assembly and power source are integrated into the dressing member, then portability and ease of operation are improved, but device complexity increases
Solution Approach 1:
The patent integrates the pump assembly and power source directly into the dressing member, combining multiple components (dressing, pump, battery) into a single unified device. This merging eliminates the need for separate external equipment, improving portability and ease of operation while the integrated design manages the complexity through functional integration.
Solution Approach 2:
The dressing member serves multiple functions: it acts as both the wound dressing and the housing for the pump assembly and power source. This multi-functionality reduces the number of separate components needed, improving portability while the universal design approach manages complexity by making each component serve multiple purposes.
2Ease of operation
If scores are added to the dressing member for increased tearability, then ease of operation is improved, but manufacturing precision requirements increase
Solution Approach 1:
The dressing member includes pre-defined score lines that segment the material into sections that can be easily torn apart. These scores create predetermined weak points in the material structure, allowing users to tear the dressing at specific locations without requiring excessive force or precision, while the manufacturing process precisely creates these score lines.
3Measurement precision
If indicators for pressure and saturation levels are incorporated, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The dressing member includes indicators that automatically monitor and display pressure and saturation levels without requiring external monitoring equipment. The foam material itself serves as both the therapeutic medium and the sensing element, with indicators that passively show the status of the wound environment, improving measurement precision while avoiding additional complex electronic systems.
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 dressing kit effectively reduces tissue edema, encourages granulation tissue formation, and minimizes bacterial load, thereby enhancing wound healing by maintaining a moist environment and stabilizing the wound site, even for challenging wound types.
Implementation Method 1
Topical negative pressure (TNP) therapy... reducing pressure tissue oedema; encouraging blood flow; stimulating the formation of granulation tissue; removing excess exudates
Implementation Method 2
a dressing member having one or more absorptive layers and a fluid impermeable backing layer
Implementation Method 3
one or more absorptive layers... configured to support the one or more absorptive layers
Data Source
Figure 1A~2C
Figure 3A~4C
Figure 5A~6B
AI summary
Some embodiments have a pump assembly mounted to or supported by a dressing for reduced pressure wound therapy. The dressing can have visual pressure, saturation, and/or temperature sensors to provide a visual indication of the level of pressure, saturation, and/or temperature within the dressing. Additionally, the pump assembly can have a pressure sensor in communication with the flow pathway through the pump, and at least one switch or button supported by the housing, the at least one switch or button being accessible to a user and being in communication with the controller. The pump assembly can have a controller supported within or by the housing, the controller being configured to control an operation of the pump. The pump can be configured to be sterilized following the assembly of the pump such that all of the components of the pump have been sterilized.