Negative-Pressure Therapy Instillation Pump Chamber
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Solution Overview
Problem
Current negative-pressure therapy systems lack efficient methods for instilling fluid to tissue sites during therapy, which can hinder wound healing by not effectively removing contaminants and promoting tissue growth.
Innovation Solution
A system comprising a pneumatically-actuated instillation pump that draws and delivers topical treatment solutions to a tissue site during negative-pressure intervals, using a disposable distribution system with check valves and filters to prevent contamination, allowing for controlled fluid management and delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If negative-pressure therapy is applied to promote tissue growth, then wound healing is accelerated, but fluid instillation capability is insufficient to effectively remove contaminants
Solution Approach 1:
The patent combines negative-pressure therapy with fluid instillation capabilities into a single integrated system. The pump chamber is mechanically coupled to the negative pressure source and the tissue site, allowing simultaneous or alternating operation of negative pressure application and fluid instillation through the same distribution component, thereby resolving the contradiction between promoting tissue growth and effectively removing contaminants.
Solution Approach 2:
The distribution component serves multiple functions: it distributes negative pressure to promote tissue growth and also delivers instillation fluid to remove contaminants. This multi-functional design allows the system to address both wound healing acceleration and contaminant removal needs through a single integrated apparatus.
2Duration of action of moving object
If continuous negative pressure is applied to accelerate tissue growth, then healing is improved, but fluid management and contaminant removal become inefficient
Solution Approach 1:
The system operates in periodic cycles, alternating between negative pressure application phases and fluid instillation phases. The pump chamber draws fluid during negative pressure intervals and delivers it during venting intervals, creating a rhythmic pattern that optimizes both tissue growth promotion and contaminant removal efficiency over time.
Solution Approach 2:
The periodic alternation between negative pressure and fluid instillation ensures continuous therapeutic action. While negative pressure promotes tissue growth during its intervals, fluid instillation simultaneously or alternately removes contaminants, ensuring that both healing processes occur continuously without interruption throughout the therapy period.
3Device complexity
If simple pump design is used to reduce device complexity, then manufacturing is easier, but contamination risk increases without adequate filters and check valves
Solution Approach 1:
The pump chamber is designed as a separate, disposable component that can be easily detached and replaced. This extraction of the pump function into a standalone unit simplifies the overall system architecture while allowing integration of necessary filtration and check valve mechanisms within the disposable component, thereby maintaining contamination prevention without excessive complexity.
Solution Approach 2:
The pump chamber and distribution component are designed as disposable single-use items. This approach simplifies the permanent components of the system while ensuring that any contamination risk is eliminated by discarding the potentially contaminated disposable components after a single use, maintaining reliability without requiring complex reusable sterilization 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
Enhances wound healing by effectively removing contaminants and promoting tissue growth through controlled fluid instillation during negative-pressure therapy, improving the efficiency and effectiveness of wound treatment.
Implementation Method 1
draws a solution from a solution source during a negative-pressure interval
Implementation Method 2
A first check valve may be fluidly coupled to the dosing inlet, and a second check valve may be fluidly coupled to the dosing outlet
Implementation Method 3
A filter can be fluidly coupled to the second fluid conductor between the fluid port and the fluid fitting to prevent contamination of other components in the system
Data Source
AI summary
Systems, apparatuses, and methods for instilling fluid to a tissue site in a negative-pressure therapy environment are described. Illustrative embodiments may include a pneumatically-actuated instillation pump that can draw a solution from a solution source during a negative-pressure interval, and instill the solution to a dressing during a venting interval. A pneumatic actuator may be mechanically coupled to a disposable distribution system that can provide a fluid path between the solution source and a distribution component. A bacterial filter may be disposed in the fluid path between the actuator and the distribution component to prevent contamination of the actuator during operation. The distribution system may be separated from the actuator and disposed of after operation, and the actuator may be re-used.