hi all

please see attached schismatics for proposed device for regulating CSF pressure the device consists three chambers one to regulate pressure and act as a reservoir when production / pressure is low and act as an expansion chamber when production / pressure is high this is achieve by means of a flexible diaphragm, the diaphragm is operated by a second diaphragm and chamber filled with saline, the saline as a buffer mimicking the csf pressure and the movement of the pressure + - diaphragm this is also were the pressure sensors are located , above the + - diaphragm is the vacuum chamber this diaphragm is deformed by mechanical means thus achieving pressure / volume changes this is achieved by means of a variable currant electromagnetic solenoid working against a calibrated spring so this can be adjusted as fast as the cpu can vary the currant all the chambers are fitted with monitoring sensors to indicate failure also there is a fail lock device fitted to the compression shaft , also a electromagnetic solenoid pressure relief valve set to fail off set into the csf circulating chamber, also a dosing port , the other two vessels act as a pump to circulate the csf through the device and have no affect on pressure, they operate in the same way as the pressure diaphragm but due to the non return valves act as a pump these are operated by on off electromagnetic solenoids, one is a backup in the event of failure this could also be done with the pressure regulating vessel to improve safety , the device is attached via two shunts this device could be set in silicone and implanted with its micro processor control and power unit out side the body

I hope this device can bring pain relief and mobility to people with CSF pressure problems what led me to design was the post below

thanks for posting a idea,s on treatment thread the device I describe below, would I feel control pressure and maintain pressure at therapeutic high / low or healthy levels , the volume of fluid in our body's is small so such a device could also be small and with technology moving fast and this being such a new field, in the right hands could such a device be developed.


with 30 years in the fire sprinkler industry I know a bit about fluid dynamics so as an engineer faced with pressure fluctuation with in a closed system such as the skull and spine which are constructed of bone that has no expansion property s with its pressure relief valve consisting of a membrane with a set aspiration rate eg non return valve and filter with a set mesh orifices on the outlet side of the system.

On the intake side we have the choroid plexus the manufacturing plant and pump now normally the pump would cut in and cut out on demand by means of a pressure switches sensing high and low pressure as set by the aspiration rate and thus maintaining normal positive pressure at a set value above the ambient blood pressure to maintain the blood brain barrier

transversely from an engineering point of view the choroid plexus, pump could run at a constant flow, the pressure maintained by the aspiration rate by increasing and decreasing the mesh orifice to allow spent CSF to pass to drain thus maintaining system pressure that way or a bit of both ( a pressure relief valve )

fluid dynamics what is pressure = compression of a liquid or gas

measurement PSI KPA bar millibar feet head ect

method fluid compress increase pressure/ expand decrease pressure
increase volume increase pressure/ decrease volume decrease pressure in a restricted flow pressure vessel

constants
pressure vessel bladder/ lining is confined by a structure of greater in tensile strength than the force exerted from within

variables effecting constant pressure
supply and demand
ambient air pressure / blood pressure
ambient temperature /blood temperature
leak

an engineering solution to stabilize pressure would be to to fit an expansion chamber and pressure relief valve the expansion chamber is a vessel that contains a diaphragm when pressure is to high a piston will allow it to expand thus reducing pressure if low pressure is detected the piston compresses the diaphragm increasing the pressure thus maintaining a steady pressure within the system without loss of volume regardless of supply and demand the pressure relief valve only operating when parameters are exceeded so minimal loss of fluid

a leak in the system

this will cause havoc with the pressure in the system the pump will be starting and stopping or running all the time the aspiration rate will be increasing and decreasing the mesh orifice size as pressure is gained and loss,d
the leak is fixed all the settings are wrong, high pressure in the system
I hope that on the horizon there is a expansion chamber and pressure relief valve being developed by a medical team with the technology moving fast with medical implant technology sorry if this seems to over simplify things but its just how i think

kind regards Vini

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