Sub-atmospheric Pressure Device for CNS Edema Reduction
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Solution Overview
Problem
Current treatments for central nervous system (CNS) conditions such as edema, infection, and cerebrovascular diseases are inadequate, as they often result in poor outcomes due to the unique anatomy and inaccessibility of CNS tissues, leading to complications like compression, infection, and progression of injury, with limited effective methods for treating pathologies affecting intracranial and intraspinal spaces.
Innovation Solution
A device and method using sub-atmospheric pressure applied through a porous bioabsorbable material to reduce edema, promote healing, and protect CNS tissues by creating a pressure gradient that removes edema, mediators, and toxins, while maintaining tissue integrity and preventing infection, utilizing a vacuum system connected to the porous material to distribute sub-atmospheric pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional treatments (drugs, mechanical drainage, resection) are used to reduce CNS edema, then edema reduction is attempted, but treatment effectiveness is poor and complications occur
Solution Approach 1:
The patent replaces conventional pharmacological and surgical treatments with a mechanical vacuum system that applies sub-atmospheric pressure directly to the CNS tissue through a porous material. This mechanical approach creates a pressure gradient that actively draws out edema fluid, bypassing the limitations of drug-based treatments and providing more reliable edema reduction without medication complications.
Solution Approach 2:
The invention employs a porous material as the interface between the vacuum system and CNS tissue. This porous structure allows selective permeability - enabling edema fluid to pass through while maintaining tissue integrity and preventing direct mechanical trauma. The porous material facilitates controlled fluid removal while protecting the delicate CNS parenchyma from the full force of the vacuum.
2Adaptability or versatility
If the CNS is treated as an inaccessible closed space, then traditional dressing changes cannot be applied, but this limits treatment options for edema and infection
Solution Approach 1:
The porous material serves as an intermediary device that bridges the vacuum system and the inaccessible CNS tissue. It allows the application of therapeutic sub-atmospheric pressure to the enclosed CNS space without requiring direct access or opening of the cranial cavity, thus enabling treatment while maintaining the protective barrier of the skull and dura.
Solution Approach 2:
The porous material functions as a flexible interface that can conform to the contours of the exposed CNS tissue while maintaining the sealed environment required for vacuum therapy. This flexible membrane allows pressure transmission while protecting the underlying tissue, enabling treatment in the confined intracranial space.
3Loss of substance
If sub-atmospheric pressure is applied to remove edema, then edema reduction is achieved, but tissue integrity must be maintained to prevent further injury
Solution Approach 1:
The porous material provides selective permeability that allows edema fluid to pass through while restricting the passage of solid tissue elements. The pore structure is designed to permit fluid flow based on size and pressure gradients, enabling edema removal while maintaining the structural integrity of neurons and supporting cells that cannot pass through the porous barrier.
Solution Approach 2:
The system uses controlled sub-atmospheric pressure (vacuum) applied through the porous material to create a pressure gradient that drives edema fluid outward. The pressure is regulated to be sufficient for fluid removal but distributed evenly through the porous interface to prevent focal compression or mechanical damage to the CNS 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 method effectively decreases CNS edema, preserves neurological function, increases recovery and survival chances, and facilitates healing by reducing intracranial pressure, minimizing tissue compromise, and promoting a more physiologically preserved state, while protecting against infection and promoting granulation tissue formation.
Implementation Method 1
providing gaseous communication between one or more pores of the porous material and the damaged central nervous system tissue
Implementation Method 2
activating the vacuum system to provide sub-atmospheric pressure to the damaged central nervous system tissue
Implementation Method 3
creating a pressure gradient that removes edema, mediators, and toxins
Data Source
AI summary
The present invention relates generally to a device and method for treating tissues of the central nervous system and more particularly, but not exclusively, to a device and method for treating the brain tissue.