40 results about "Cerebrospinal fluid flow" patented technology

A system for measuring quantitative CSF flow in shunt tubing implanted under the skin. The system includes an array of thermosensors clustered in three sections, cooling device, placed on the skin surface and an associated data acquisition and analysis device. Two sensor sections are placed over the shunt on the skin and measure real time temperature responses related to CSF movement. One array placed adjacent the cooling device collects data on thermal properties of skin including skin thermal condictivity, specific heat, diffusivity, perfusion, and thermal inertia. The method involves assessing thermal properties of skin and measuring CSF flow in shunt tubing. The method is useful for shunt patency assessment, CSF valve adjustment procedures and CSF flow measurements related to CSF over drainage. Alternatively, only one section of sensors need be used when determining relative CSF flow, without the need to determine thermal skin properties and by applying the cooling device continuously.

A cerebrospinal fluid drainage pressure limiter, which includes a pressure limiter adjustment button, a pressure limiter upper cover, a return spring, a pressure-sensitive push plate, a valve membrane upper piece, a valve membrane lower piece, a pressure limiter housing, an outflow switch shaft, Outflow switch pressure plate, pressure-sensitive push plate shaft, switch return spring, small O-ring fixed sleeve, small O-ring, outflow spool, outflow valve body, pressure measuring O-ring, sealing O-ring, measured pressure switch interface; the outflow valve body is provided with a three-way pipe, the three-way pipe has a liquid inlet, and the three-way pipe is respectively connected to the liquid outlet nozzle of the capsule, the pressure-tested switch interface, and the outflow valve core, wherein the capsule is composed of The lower valve membrane and the upper valve membrane are bonded together; when the pressure measuring switch interface and the outflow valve core are closed, the entering cerebrospinal fluid expands the capsule, pushes the pressure-sensitive push plate and the outflow switch pressure plate on it, and opens the outflow valve core The cerebrospinal fluid flows out; when the pressure of the cerebrospinal fluid is low, the capsule in the valve shrinks under the action of the return spring and the switch return spring, and the valve is closed.

The invention discloses a bioreactor for in vitro culture of neurotrophic factors, which comprises an upper cover and a lower cover which are provided with concave cavities. The concave cavities of the upper cover and the lower cover are closed in opposite directions and fixed to form a box body, a culture plate through which cerebrospinal fluid can pass is arranged in the cavity of the box body,a polyether sulfone semi-permeable membrane is covered on the culture plate, the culture plate is embedded to the middle lower part of the concave cavity of the lower cover and positioned between theupper cover and the lower cover, both the upper part and the lower part of the culture plate are spaces in which the cerebrospinal fluid flows, the upper cover is provided with an input nozzle, the lower cover is provided with an output nozzle, and the upper end face of the upper cover is provided with a plurality of holes through which the air enters the box body. The bioreactor enables the cerebrospinal fluid of a nervous system dysfunction patient to be circulated in the bioreactor and fully mixed with the neurotrophic factors secreted by star-shaped gliocytes to form mixed cerebrospinal fluid containing the neurotrophic factors to be redelivered to the lower cavity of the arachnoid membrane or the ventricular system of the patient, thereby realizing promotion of recovery of functionaldeficiency or functional disorder of the central nervous system caused by diseases or injury, and remarkably improving the life quality of the patient.

A device capable of automatically adjusting shunt volume of cerebrospinal fluid and preventing a shunt tube from being blocked comprises a pressure sensor, the Y-shaped shunt tube, a transfer pump, a first programmed switch, a second programmed switch, a loading plate, a first electronic control system, a first power source, a second electronic control system and a second power source. The first programmed switch is used for communicating or cutting off a passage for cerebrospinal fluid to flow between two upper arm catheters of the Y-shaped shunt tube. The second programmed switch is used for communicating or cutting off a passage for cerebrospinal fluid to pass through a lower arm catheter of the Y-shaped shunt tube and enter the abdominal cavity. The transfer pump is used for driving cerebrospinal fluid in the Y-shaped shunt tube to flow. The pressure sensor is used for collecting pressure in the cranium. The first electronic control system is used for controlling the state of the transfer pump, the first programmed switch and the second programmed switch according to situations of the pressure in the cranium, and transmitting relative information to the second electronic control system. The second electronic control system is used for receiving and displaying the information of the first electronic control system, and sending an instruction to the first electronic control system.

The invention relates to a magnetic resonance imaging device and method. Provided are a magnetic resonance imaging apparatus and method capable of appropriately visualizing the dynamics of cerebrospinal fluid. A magnetic resonance imaging apparatus according to the present invention includes a collecting unit and a generating unit. Under the task of respiration, after the collection unit applies the marking pulse to the marking area where the cerebrospinal fluid flows, it collects the data of the imaging area covering multiple time phases within a prescribed breathing cycle. The generation unit generates images depicting a plurality of time phases of the cerebrospinal fluid using the collected data.

The present invention is an automatic speed measurement and automatic pulse cleaning device for external drainage of cerebrospinal fluid, which includes a housing, and the inside of the housing includes a liquid drop monitoring device, a one-way pump on the effusion side, a one-way pump on the saline side, connecting rods, gears, Drive gears, motors, and computer control chips. The one-way pump on the effusion side is composed of an effusion chamber and the left side of a synchronous piston located in the effusion chamber. The one-way pump on the saline side is composed of a saline chamber and a The right side of the synchronous piston in the normal saline cavity is formed; the left side of the synchronous piston divides the effusion cavity into the effusion cavity C and the effusion cavity D, and the right side of the synchronous piston divides the normal saline cavity into the normal saline cavity A, Physiological saline chamber B; the power output end of the motor is connected to a driving gear, the driving gear is meshed with a gear, the gear is connected to a connecting rod, and the connecting rod is connected to a synchronous piston. The automatic monitoring function of the present invention continuously monitors the drip rate of the external drainage of the cerebrospinal fluid, so as to prevent possible untimely discovery by manual monitoring and affect the treatment of patients.