Oscillating CSF Drainage Device for Cerebral Blood Flow
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Solution Overview
Problem
Current methods for regulating cerebrospinal fluid (CSF) in the brain, such as large hemi-craniotomies and ventricular catheterization, are invasive and limited in their ability to effectively increase cerebral blood flow, particularly in cases of brain injury or trauma, as they either pose significant complications or are restricted by the amount of fluid that can be drained.
Innovation Solution
A device featuring a cerebrospinal conduit with an actively oscillatably changeable sealed fluid volume that synchronizes with a patient's biorythm, using an actuator and sensor system to modulate CSF volume, allowing for controlled oscillation of CSF in and out of the cerebrospinal fluid space, thereby regulating intracranial pressure and flow pulsation without the need for invasive procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If ventricular catheterization is used to drain CSF, then intracranial pressure decreases and cerebral blood flow increases, but the amount of fluid that can be drained is limited and slit ventricles become completely drained without further advantage
Solution Approach 1:
The patent applies a dynamic oscillation mechanism to the CSF drainage system. The oscillating pump creates periodic pressure changes that dynamically adjust the flow of CSF through the ventricular catheter, allowing continuous regulation of intracranial pressure and maintenance of optimal cerebral blood flow without being limited by the static drainage capacity of traditional catheters.
Solution Approach 2:
The invention employs periodic oscillation of the pump to create cyclic pressure variations in the CSF drainage system. This periodic action enables the system to overcome the limitation of static drainage by creating pulsatile flow patterns that maintain pressure gradients and facilitate continuous CSF removal while preventing complete drainage of slit ventricles.
2Productivity
If large hemi-craniotomies are performed to decrease intracranial pressure, then cerebral blood flow increases, but the procedure is large and has complications
Solution Approach 1:
The patent replaces the mechanical approach of large surgical craniotomies with a minimally invasive oscillating pump system. Instead of physically removing large portions of skull and brain tissue to access ventricles, the system uses controlled oscillations to regulate CSF flow through a small catheter, thereby achieving the same blood flow improvement with significantly reduced surgical complexity and complications.
Solution Approach 2:
The invention changes the operational parameters of CSF drainage from static to dynamic by introducing oscillation. The pump operates at variable frequencies and amplitudes that can be adjusted to optimize intracranial pressure reduction and cerebral blood flow enhancement, replacing the need for large mechanical surgical interventions with controlled parameter modulation.
3Productivity
If CSF is drained to increase brain compliance, then blood flow improves, but the ventricles become completely drained without further advantage
Solution Approach 1:
The patent incorporates feedback mechanisms that monitor intracranial pressure and CSF flow in real-time. The oscillating pump system adjusts its operation based on this feedback, stopping drainage when optimal compliance is achieved and preventing complete drainage of slit ventricles. This closed-loop control ensures reliable maintenance of brain compliance while avoiding over-drainage.
Solution Approach 2:
The system transitions from static drainage to dynamic, regulated oscillation that can adapt to changing intracranial conditions. The oscillating pump creates controlled pressure variations that maintain optimal CSF flow while preventing complete ventricular drainage, thereby improving both cerebral blood flow and drainage control reliability.
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 solution enables non-invasive control of intracranial pressure and cerebrovascular resistance, increasing cerebral blood flow in patients with decreased cerebral perfusion, including those with trauma, stroke, or hydrocephalus, by maintaining a closed CSF drainage system and allowing for CSF removal as needed, without the limitations of traditional methods.
Implementation Method 1
The changeable sealed fluid volume can be in fluid communication with the cerebrospinal conduit and is capable of actively oscillating or modulating in a changing fluid volume size for oscillating or modulating the cerebrospinal fluid in and out of the distal end of the cerebrospinal conduit and cerebrospinal fluid space
Implementation Method 2
The deformable membrane can have a second surface which is fluidly isolated from the first surface. Application of an oscillating force on the second surface of the deformable membrane is capable of deforming the deformable membrane to oscillate the changing fluid volume size of the changeable sealed fluid volume
Data Source
AI summary
A device for regulating cerebrospinal fluid in a cerebrospinal fluid space includes a cerebrospinal conduit having a distal end for insertion into the cerebrospinal fluid space in fluid communication with the cerebrospinal fluid. An actively oscillatably changeable sealed fluid volume can be in fluid communication with the cerebrospinal conduit. The changeable sealed fluid volume can be in a sealed fluid path extending to the distal end of the cerebrospinal conduit and is capable of actively oscillating in a changing fluid volume size for oscillating the cerebrospinal fluid in and out of the distal end of the cerebrospinal conduit and cerebrospinal fluid space.