Flexible Diffusion Chamber for Brain Ventricle Drug Delivery
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Solution Overview
Problem
Current drug delivery systems for neurological conditions like epilepsy are limited by side effects, require precise dosing, and have challenges with delivering medication directly to the brain due to size and power constraints of implantable pumps, leading to frequent drug replenishment and limited shelf life.
Innovation Solution
A system comprising a flexible catheter with a diffusion chamber that delivers solid form medication to the brain's ventricles, allowing medication to dissolve in cerebrospinal fluid and diffuse through the chamber's apertures or membranes, providing controlled and localized drug delivery with a flexible design that conforms to the brain's shape without causing significant physiological effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If implantable drug pumps are used to deliver medication to the brain, then precise dosing control is achieved, but device size and power requirements increase
Solution Approach 1:
The patent extracts the power source and complex pumping mechanism from the intracranial device, using only a passive diffusion chamber implanted in the brain ventricle. The drug is delivered through passive diffusion across a membrane, eliminating the need for batteries, motors, and control electronics that would increase device size and power requirements while maintaining precise dosing control through membrane permeability characteristics.
2Reliability
If higher doses of drug are given systemically to treat neurological conditions, then therapeutic effect is achieved, but side effects increase
Solution Approach 1:
The patent implements local quality by delivering medication directly to the brain ventricles through a diffusion chamber implanted in the target site. This localized delivery ensures high drug concentration at the therapeutic site while minimizing systemic circulation and associated side effects. The diffusion membrane allows controlled local release of the drug into the cerebrospinal fluid.
3Measurement precision
If implantable drug delivery devices are used, then precise localized delivery is achieved, but frequent replenishment is required due to limited reservoir size
Solution Approach 1:
The patent employs preliminary action by loading the diffusion chamber with a large reservoir of solid drug pellets before implantation. The chamber is pre-filled with sufficient medication to last for extended periods (months to years), and the drug is delivered gradually through passive diffusion. This preliminary loading eliminates the need for frequent surgical replenishment while maintaining precise localized delivery through the diffusion membrane.
4Strength
If rigid delivery catheters are used to deliver medication to the brain, then structural integrity is maintained, but flexibility to conform to brain shape is reduced
Solution Approach 1:
The patent uses a flexible diffusion chamber made of a thin membrane material that can conform to the irregular shape of the brain ventricles. The chamber maintains structural integrity sufficient to contain the drug reservoir and control diffusion, while its flexible nature allows it to adapt to the anatomical contours of the brain, ensuring proper positioning and continuous contact with the cerebrospinal fluid.
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
This approach enables precise and prolonged drug delivery to the brain, reducing side effects and the need for frequent replenishment, while maintaining effective treatment of neurological conditions like epilepsy with minimal impact on cerebrospinal fluid production and brain function.
Implementation Method 1
allowing medication to dissolve in cerebrospinal fluid and diffuse through the chamber's apertures or membranes
Implementation Method 2
a flexible design that conforms to the brain's shape without causing significant physiological effects
Data Source
AI summary
Various embodiments provide an apparatus, system method for treating neurological conditions by delivering solid form medication to the ventricles or other areas of the brain. Particular embodiments provide an apparatus and method for treating epilepsy and other neurological conditions by delivering solid form medication to ventricles in the brain wherein the medication is contained in a diffusion chamber so as to allow the medication to dissolve in the cerebrospinal fluid of the brain and then diffuse out of the diffusion chamber to be delivered to the ventricles and brain tissue. In one or more embodiments, portions of apparatus have sufficient flexibility to conform to the shape of the ventricles of the brain when advanced into them and/or to not cause deformation of the ventricle sufficient to cause a significant physiologic effect.