Osmolar Brain Devices for Localized Cerebral Edema Fluid Extraction
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Solution Overview
Problem
Current osmotic therapies for cerebral edema, such as the use of Mannitol and hypertonic saline, cause significant side effects due to global introduction into the vascular system, and surgical decompression is risky and invasive.
Innovation Solution
Development of osmolar devices and stents with high osmolarity that are inserted into the brain or blood vessels to locally absorb excess fluid, creating an osmotic gradient to reduce intracranial pressure without systemic side effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If traditional osmolar agents (Mannitol, hypertonic saline) are administered intravenously to treat cerebral edema, then fluid extraction from brain tissue is achieved, but systemic side effects occur including hemolysis, hypotension, pulmonary edema, and electrolyte disturbances
Solution Approach 1:
The invention divides the treatment approach by placing multiple discrete osmolar devices at specific locations within the brain (e.g., in ventricles or adjacent to edematous regions) rather than administering a single systemic dose. This segmentation allows localized fluid extraction while minimizing systemic exposure and associated side effects.
Solution Approach 2:
The patent applies local quality by using devices with high osmolarity (e.g., 600-1200 mOsm/L) specifically at the site of cerebral edema, creating a localized osmotic gradient that draws fluid from brain tissue without requiring global systemic administration. This concentrates the therapeutic effect where needed while reducing harmful systemic effects.
2Stress or pressure
If surgical decompression (craniectomy) is performed to treat cerebral edema, then intracranial pressure is reduced, but the procedure carries significant surgical risks and potential complications
Solution Approach 1:
The invention extracts the essential function of pressure reduction without the need for surgical decompression. By placing osmolar devices that create osmotic gradients, fluid is drawn from brain tissue into the devices, thereby reducing brain volume and intracranial pressure through a minimally invasive percutaneous approach rather than open surgery.
Solution Approach 2:
The osmolar devices act as intermediaries between the edematous brain tissue and the external environment. These devices (which may be placed in ventricles or adjacent to affected areas) mediate fluid removal through osmotic action, providing pressure relief without requiring direct surgical access to the brain parenchyma or cranial vault.
3Quantity of substance
If osmolar devices are designed with high osmolarity (600-1200 mOsm/L) to enhance fluid absorption capacity, then the volume of device expansion upon fluid absorption increases, but this may increase intracranial space occupation
Solution Approach 1:
The osmolar devices utilize osmotic phase transition principles where the high osmolarity material (such as hypertonic saline or other osmotic agents) creates a gradient that drives fluid from the brain tissue into the device. The device is designed to accommodate this fluid transfer while maintaining a compact form, potentially using materials that can undergo controlled expansion or have porous structures that manage volume changes.
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
Effectively reduces brain swelling by locally extracting fluid, minimizing damage to healthy tissue and avoiding systemic complications associated with traditional osmotic agents.
Implementation Method 1
the device is configured to induce an osmotic pressure upon submersion in the fluid and/or placement in brain tissue
Implementation Method 2
the use of an osmolar agent to create an intravascular osmotic gradient that facilitates fluid extraction from the swelling/swollen brain
Data Source
AI summary
Disclosed herein are devices and methods for the treatment and prevention of tissue swelling. The method involves creating an opening in a patient's skull and placement of a device in the patient's brain. The device is configured to absorb fluid from the patient's brain, thereby reducing intracranial pressure. Additionally, the device may be configured to induce an osmotic pressure to drive out fluid from the brain to reduce intracranial pressure. These methods and devices provide for a localized solution to tissue swelling and accordingly obviate the need to flood patients' vascular systems with osmolar compounds that may lead to well-documented side effects.