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40 results about "Cerebrospinal fluid flow" patented technology
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Cerebral spinal fluid flow sensing device
InactiveUS20060020239A1Evaluate performance of ventricular shuntEnsure correct executionWound drainsEndoradiosondesFlow transducerCsf shunt
The disclosure is directed to an implantable device for sensing CSF flow through an implantable ventricular shunt. The sensing device is implanted with the CSF shunt, and includes a flow sensor to sense flow rate or shunt blockage. The sensing device is either placed within or adjacent to the fluid path through the shunt. The sensing device transmits the sensed flow rate to an external monitoring device by wireless telemetry. The sensing device may be integrally formed as part of the shunt, or clamped onto a portion of the shunt, in which case the sensing device may be resusable. An external monitor receives the transmitted flow signal and presents information based on the flow signal. The sensing device may be inductively powered or include its own power supply.
Owner:MEDTRONIC INC
Method and apparatus for managing normal pressure hydrocephalus
InactiveUS20050055009A1Increased and decreased resistanceReduce resistanceWound drainsMedical devicesVentricular volumePhysician attending
An adjustable drainage system for regulating cerebrospinal fluid flow in a hydrocephalus patient where the drainage rate is adjusted in response to ventricular volume variations in the patient. The system includes an adjustable valve and a volume sensor that can be periodically energized with an external system controller device by the patient or attending physician to determine when, or if, a change in the ventricular volume has occurred. The system enables the user to adjust the valve's resistance in response to changes in the ventricular volume using the controller device so that a target ventricular volume can be achieved. Also provided is a method of continuously draining cerebrospinal fluid from the cranial cavity of the patient using the system of the present invention.
Owner:CODMAN & SHURTLEFF INC
Implantable anti-clogging device for maintenance of cerebrospinal fluid shunt patency
Cerebrospinal fluid shunts (implantable devices for diversion of excess fluid from the brain to other body cavities) used to treat hydrocephalus often malfunction. A common etiology of shunt malfunction is obstruction of the distal catheter tip by accumulating particulate matter such as fat or proteinaceous debris. The proposed implantable device maintains the patency of the cerebrospinal fluid shunt with mechanical energy which serves to “scrub” the catheter lumen of particulate debris. The proposed device accomplishes this by housing a source of mechanical energy which is coupled to the external aspect of the catheter, itself traversing through a bore in the device. The energy source secondarily induces a waveform in the cerebrospinal fluid flowing through the catheter. The fluid waveform exerts shearing forces on the catheter wall and serves to disrupt the formation and accumulation of debris that potentially could occlude the shunt catheter, thereby maintaining patency of the shunt.
Owner:OSBORN BRETT +1
Real time CSF flow measurement system & method
InactiveUS20130109998A1Remove effectVolume/mass flow measurementWound drainsTemperature responseData acquisition
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.
Owner:SHUNTCHECK
Cerebrospinal fluid drainage device and intracranial pressure monitoring system
InactiveCN105641758AAvoid backflow) phenomenonPrevent backflowWound drainsMedical devicesAirbagControl valves
The invention provides a cerebrospinal fluid drainage device and an intracranial pressure monitoring system. The cerebrospinal fluid drainage device comprises a cerebrospinal fluid drainage tube and a drainage bag used for collecting fluid in the cerebrospinal fluid drainage tube, a guide tube used for being connected with a pressure sensor is communicated on the cerebrospinal fluid drainage tube, a first control valve is arranged at a position, between the guide tube and the drainage bag, of the cerebrospinal fluid drainage tube, and a buffering airbag is arranged at a position, close to a joint of the guide tube and the cerebrospinal fluid drainage tube, of the guide tube. Through the buffering airbag arranged on the guide tube, cerebrospinal fluid in the cerebrospinal fluid drainage tube can be effectively avoided being sucked back into the guide tube, so that failing of the pressure sensor caused by the fact that the cerebrospinal fluid flows back to the pressure sensor can be effectively prevented, accuracy of intracranial pressure detected by the pressure sensor is guaranteed, the pressure sensor is prevented from being polluted by the cerebrospinal fluid, and cross infection caused by reuse of the sensor is avoided.
Owner:王学建
Implantable cerebral spinal fluid flow device and method of controlling flow of cerebral spinal fluid
InactiveUS20060247569A1Reduce decreaseReduce usageWound drainsIntravenous devicesBiomedical engineeringCerebrospinal fluid flow
An implantable cerebral spinal fluid flow device and method. A body has an inlet for the cerebral spinal fluid, an outlet for the cerebral spinal fluid and a first interior cavity fluidly coupled with the inlet and the outlet. A first rotational element is mounted in the first interior cavity in a pathway between the inlet and the outlet. The first rotational element provides resistance to flow of the cerebral spinal fluid from the inlet to the outlet. In the method, the cerebral spinal fluid flow device is implanted. Resistance to rotation of the first rotational element to flow of the cerebral spinal fluid from the inlet to the outlet is provided.
Owner:MEDTRONIC INC
Real time CSF flow measurement system and method
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.
Owner:SHUNTCHECK
Cerebrospinal Fluid Flow Diverter
A device that can be placed within or near the cranial vault that fluctuates in size in response to changes in CSF pressure is disclosed. The device diminishes in size when CSF pressures rise and increases in size as CSF pressures diminish. The device has the effect of reducing the flow of CSF occurring in the foramen magnum and provides an alternative to craniovertebral decompression in Chiari I patients. The device may have applications in other neurologic illnesses associated with abnormal CSF flow, such as Idiopathic Syringomyelia, Normal Pressure Hydrocephalus, and CSF dural leaks.
Owner:HAUGHTON VICTOR M
Spinal puncture teaching model
The invention discloses a spinal puncture teaching model, belonging to the field of medical teaching. The spinal puncture teaching model comprises a spinal puncture model, a puncture needle, a cerebrospinal fluid flow guide device, an operation control circuit and a flexible drainage pipe, wherein the spinal puncture model consists of a lumbar vertebrae bone, a sacral vertebrae bone and a round pipe; a pressure sensor is arranged in the round pipe; a needle handle is provided with a side through pipe and a straight through pipe; the cerebrospinal fluid flow guide device consists of a liquid storage tank, a liquid feeding port, a liquid discharging port, cerebrospinal-fluid drainage liquid, a micropump, a micropump power supply circuit and a hydrops depth control floater; the operation control circuit consists of a power supply, a position indicating circuit and a hydrops depth control floater; and the position indicating circuit consists of a pressure sensor, an in-place indicating lamp and a relay. The spinal puncture teaching model disclosed by the invention has the beneficial effects that the effects of convenience, durability and intuition can be achieved, the notification of the operation practice working and the finishing condition information of spinal puncture can be directly realized, the repeated use can be achieved, and the purpose that the spinal puncture teaching model can bear the practice of repeated operation and training is realized.
Owner:XUZHOU MEDICAL COLLEGE
Flow compensation method for nuclear magnetic resonance imaging system
ActiveCN104459587AWeakening flow phenomenonAttenuated flow phenomenon has artifacts in existing FSE imagesMagnetic measurementsFast spin echoPhysiological movement
The invention discloses a flow compensation method for a nuclear magnetic resonance imaging system. The flow compensation method is characterized by comprising the following steps that: (1) gradient combined pulses which satisfy flow compensation are applied in a frequency encoding direction between a 90-degree radio frequency pulse time series and a 180-degree radio frequency pulse time series of a fast spin echo (FSE) sequence; (2) a scattering gradient is applied before a signal acquisition gradient and before 180-degree radio frequency pulses, and a compensation gradient is applied after the acquisition gradient, and the signal acquisition gradient, the scattering gradient and the compensation gradient jointly form a first-order gradient velocity compensation gradient; (3) phase encoding gradient amplitude is set to be zero, and the time series of the sequence is set, and the amplitudes of the gradients are adjusted, and the amplitude of echo signal peaks of an echo chain is made to reach a maximum value, and the debugging of the sequence is completed; and (4) the sequence is outputted to a spectrometer, so that flow compensation can be realized. With the flow compensation method for the nuclear magnetic resonance imaging system of the invention adopted, situations such as cerebrospinal fluid flow and spinal fluid flow artifacts and image blurring can be significantly inhibited, and therefore, the problem of image artifact generation which is caused by physiological movement such as blood flow or periodic movement can be alleviated.
Owner:BEIJING WANDONG MEDICAL TECH CO LTD
Digital pressure gauge for lumbar puncture with controllable cerebrospinal fluid
ActiveCN107157553ARelieve painImprove the chance of waist piercing successSurgical needlesVaccination/ovulation diagnosticsSpinal needlesLumbar
The invention relates to the field of medical instruments, in particular to a digital pressure gauge for lumbar puncture with controllable cerebrospinal fluid. The gauge comprises a lumbar spinal needle connecting end, a cerebrospinal fluid connecting end, a pressure sensor and a numeric display meter and is characterized in that the interior of a housing of the gauge is partially narrowed to form a valve seat; the valve seat divides an inner cavity of the housing into a cerebrospinal fluid drainage cavity and a pressure detection cavity; when a valve head is closely attached to the valve seat, a channel between the cerebrospinal fluid drainage cavity and the pressure detection cavity is blocked; when the valve head is away from the valve seat, the cerebrospinal fluid drainage cavity communicates with the pressure detection cavity; and the lumbar spinal needle connecting end and the cerebrospinal fluid connecting end are arranged; and the cerebrospinal fluid connecting end is a section of 90-degree bent pipe. Compared with the prior art, the digital pressure gauge for lumbar puncture with the controllable cerebrospinal fluid has the following advantages: pressure value can be read at any time before collection of cerebrospinal fluid and during collection of cerebrospinal fluid; intracranial pressure valve after lumbar puncture can be displayed; and the digital pressure gauge can play an important role in guiding the positions and medicine use for a patient who takes a rest after lumbar puncture.
Owner:THE FIRST HOSPITAL OF CHINA MEDICIAL UNIV
Partial skull replacements capable of monitoring in real time and delivering substances into brain tissue, and uses thereof
ActiveUS20160263277A1Minimal influenceReduce deliveryUltrasonic/sonic/infrasonic diagnosticsEchographic/ultrasound-imaging preparationsCLARITYOrganism
The present invention relates to a partial skull replacement consisting of polydimethylsiloxane (PDMS) and a method of monitoring biological tissues within a skull using the partial skull replacement. The method of monitoring using the partial skull replacement of the present invention has a minimal influence on intracranial pressure and cerebrospinal fluid flow as compared to a conventional cranial window technique using glass, and, by way of visualizing biological tissues within a skull with enhanced clarity, is expected to be usefully employed as a method of monitoring biological tissues within the skull.
Owner:RES & BUSINESS FOUND SUNGKYUNKWAN UNIV +1
Lumbar puncture needle
InactiveCN103006295APrecise control of outflowAccurate spacing adjustmentSurgical needlesDiagnostic recording/measuringMedicineSyringe needle
The invention discloses a lumbar puncture needle, which comprises a needle, wherein the needle is provided with a tubular needle cavity, the tail of the needle is fixedly arranged on a handle, and the handle is provided with a cavity and a valve handle; the cavity consists of a handle cavity, a tubular handle cavity and a threaded through hole, the left end of the handle cavity communicates with the tubular handle cavity, the right end of the handle cavity communicates with the threaded through hole, the tubular needle cavity communicates with the tubular handle cavity, and the left end of the handle cavity is a conical tubular cavity surface; the valve handle comprises a threaded rod, the left end of the threaded rod is provided with an integrated valve handle cone, the right end of the threaded rod is provided with an integrated rotating handle, the threaded rod runs through the threaded through hole, the outer surface of the valve handle cone is matched with the conical tubular cavity surface, and the rotating handle is exposed on the right side of the handle; the bottom of the handle is provided with a fluid outlet seat, the top of the handle is provided with a pressure-measuring seat, the fluid outlet seat is provided with a valve, and the pressure-measuring seat is connected with a pressure-measuring device. The lumbar puncture needle can ensure that whether cerebrospinal fluid flows out or not can be directly viewed, can accurately control the flow of cerebrospinal fluid, and is easy and convenient to operate and safe to use.
Owner:王金成
Implantable cerebrospinal fluid flow device and method of controlling flow of cerebrospinal fluid
ActiveUS8333728B2Improve expected functionHigh and resistanceStentsWound drainsFluid controlFlow diverter
An implantable shunt that includes one or more catheters configured so that the implantable shunt has a resistance to flow greater than about 3 mm Hg / mL / minute. An implantable shunt system that includes one or more catheters and a fluid control device that utilizes the properties of the catheters to improve the expected function of the shunt by providing a higher or lower resistance to the flow through the shunt and reduces the effect of pulsations of cerebrospinal fluid on the shunt system.
Owner:MEDTRONIC PS MEDICAL
Magnetic resonance imaging apparatus and method
ActiveCN103356190AAppropriate dynamic visualizationImage enhancementMedical imagingResonanceMR - Magnetic resonance
A magnetic resonance imaging apparatus according to an embodiment includes a collection unit and a generation unit. The collection unit collects data of an imaging area over a plurality of time phases within a certain respiratory cycle after applying a labeling pulse to a labeling area in which cerebrospinal fluid flows under a task of respiration. The generation unit generates images of a plurality of time phases depicting the cerebrospinal fluid by using the collected data.
Owner:TOSHIBA MEDICAL SYST CORP
Novel lumbar puncture needle capable of realizing semi-automatic needle insertion
PendingCN113208707AAvoid safety hazardsEasy to operateDiagnostics using lightSurgical needlesLumbar spineLumbar puncture needle
The invention relates to a novel lumbar puncture needle capable of realizing semi-automatic needle insertion, belongs to the technical field of medical instruments, solves the problems of needle head displacement and too deep needle insertion caused by manual needle pushing in the existing lumbar puncture, and enables the needle insertion process to be more accurate and stable. The novel lumbar puncture needle structurally comprises a needle head, an electromagnetic three-way valve, an optical fiber sensor, a pressure sensor, a sensor shell, a stepping motor, a needle inserting track and a puncture needle shell, wherein the needle head is connected with the electromagnetic three-way valve. After cerebrospinal fluid flows in, three functional states are realized along with reversing of a valve core; the optical fiber sensor can be used for directly measuring the pressure of the cerebrospinal fluid; the stepping motor drives the needle head to slowly advance along a needle inserting track at a constant speed, so that needle inserting errors caused by manual needle pushing are avoided; and the pressure sensor measures the needle insertion resistance and provides a judgment basis for the needle insertion depth. Through semi-automatic reversing of the electromagnetic three-way valve, measurement of the pressure of the cerebrospinal fluid by the optical fiber sensor, constant-speed slow needle insertion driven by the stepping motor, and real-time reflection of needle insertion resistance by the pressure sensor, accurate and efficient lumbar puncture operation is realized.
Owner:SICHUAN UNIV
Lumbar cistern drainage and intracranial pressure monitoring system
PendingCN110141209ADrainage avoidancePrevent backflowCannulasSurgical needlesCerebral herniaMedicine
Owner:刘海波
Intrathecal catheter with means to measure quality of drug dispersion
ActiveUS20210077016A1Improved medicament dispersionBetter clinical outcomeMedical devicesPressure infusionIntrathecal useFluid administration
A method of determining a local cerebrospinal fluid flow rate. The method including the steps of positioning a distal end of the catheter in a flow of cerebrospinal fluid of the patient, the catheter including an infusion port and at least one temperature sensor positioned at a fixed distance from the infusion port, infusing a bolus of a temperature controlled fluid through the infusion port into the flow of cerebrospinal fluid, and monitoring a temperature sensed by the at least one temperature sensor, wherein a change in the temperature sensed by the at least one temperature sensor over time is representative of a local cerebrospinal fluid flow rate in proximity to the infusion port.
Owner:MEDTRONIC INC
Method for reducing obstructive hydrocephalus
InactiveUS20060210548A1Reducing cerebrospinal fluid flow obstructionReduce cerebrospinal fluid flow obstructionPeptide/protein ingredientsBlood disorderAnticoagulantPlatelet inhibitor
A process for reducing cerebrospinal fluid flow obstruction includes the administration of a therapeutic dose of a clot-reducing agent to a subject having preconditions or obstructive hydrocephalus symptoms. The dose is maintained within the subject for a period of time sufficient to reduce cerebrospinal fluid flow obstruction. The clot-reducing agent includes a plasminogen activator, a defibrinogenic agent, an anticoagulant, a platelet inhibitor and a combination thereof. A commercial kit is provided, containing a clot-reducing agent, an administering apparatus, together with instructions for use of the kit.
Owner:UAB RES FOUND
Cerebrospinal fluid drainage device and method
PendingCN112546317AWill not polluteSimple structureMedical devicesSuction devicesPhysical therapySurgery
The invention discloses a cerebrospinal fluid drainage device and method. The cerebrospinal fluid drainage device comprises a drainage tubeline, a flow velocity sensor, a flow regulator and a drainagecontrol system, wherein the drainage control system comprises a man-machine interaction module and a drainage control module; the man-machine interaction module is used for inputting an expected flowvelocity / flow velocity range and an expected drainage amount, recording and displaying patient personal information, treatment information, a historical cerebrospinal fluid flow velocity and a current cerebrospinal fluid flow velocity, and judging a drainage state according to the current cerebrospinal fluid drainage amount and a real-time fluid flow velocity; and the drainage control module controls the flow regulator according to the current drainage state so as to enable the real-time fluid flow velocity to be equal to the expected flow velocity or fall into the expected flow velocity range or controls the current drainage to be paused / ended. The cerebrospinal fluid drainage device is simple in structure, automatic pressure and velocity regulation of automatic cerebrospinal fluid drainage can be achieved by directly improving a traditional cerebrospinal fluid drainage device, the pressure and velocity control precision is high, the product is reliable, and the use is convenient.
Owner:CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI +1
Cerebrospinal fluid drainage pressure limiter
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.
Owner:GENERAL HOSPITAL OF PLA
Cerebrospinal fluid stop valve
InactiveCN106075719APrevent outflowAvoid awkward embarrassmentMedical devicesValvesCatheterEngineering
Owner:BEIJING ZHAOSHI MEDICAL EQUIP CO LTD
Implantable system for increasing intrathecal drug dispersion
A medical device configured to improve dispersion of a medicament within cerebrospinal fluid of a patient is disclosed. The medical device includes an implantable catheter having: a distal tip configured to be positioned within a cerebrospinal fluid flow; a proximal tip; a body defining a lumen extending longitudinally along the implantable catheter, the lumen configured to enable a medicament to flow from the proximal tip to an infusion port positioned proximate the distal tip; and a piezoelectric element positioned proximate the infusion port, the piezoelectric element configured to selectively oscillate during administration of a medicament to improve dispersion of the medicament within the cerebrospinal fluid.
Owner:MEDTRONIC INC
Reversible syringomyelia animal model, and construction method and application thereof
ActiveCN111494054AReversibleWill not proliferateSurgical veterinarySpinal cord lesionSpinal dura mater
The invention discloses a reversible syringomyelia animal model, and a construction method and application thereof. The construction method comprises the following steps: S1, exposing a T13 vertebralplate, and cutting a ligamentum flavum to expose a spinal dura mater; S2, quantitatively oppressing the T13 spinal dura mater to make cerebrospinal fluid extruded to the periphery and the circulationof the cerebrospinal fluid blocked; and S3, removing the vertebral plate and an oppressor to reduce the pressure in order to make the subdural cerebrospinal fluid recovered again. A quantitative cotton sliver is filled into the inner side of the T13 vertebral plate of a rat through microsurgery, cerebrospinal fluid flow is blocked through epidural oppression to make the rat have syringomyelia, andthen an operation relieves the oppression, reverses syringomyelia, and realizes the gradual reduction of rat syringomyelia. According to the method, an animal model of the syringomyelia caused by reversible non-biochemical destruction is established, feasibility verification of MRI dynamic observation of the animal syringomyelia is achieved, the constructed cavity is a reversible cavity, and a model basis is provided for related research of the syringomyelia and spinal cord injury.
Owner:XUANWU HOSPITAL OF CAPITAL UNIV OF MEDICAL SCI
Bioreactor for in vitro culture of neurotrophic factors
InactiveCN101665768BPromotes adherent growthImprove the quality of lifeTissue/virus culture apparatusSubarachnoid spaceLife quality
Owner:THE SECOND AFFILIATED HOSPITAL ARMY MEDICAL UNIV
A device that can automatically adjust the shunt flow of cerebrospinal fluid and prevent the blockage of the shunt tube
InactiveCN103800991BPrecise regulation of intracranial pressureClinical harm reductionWound drainsCatheterAbdominal cavityControl system
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.
Owner:WEST CHINA HOSPITAL SICHUAN UNIV
Cerebrospinal fluid drainage pressure limiter
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.
Owner:GENERAL HOSPITAL OF PLA
Sleeve type lumbar puncture needle and use method thereof
InactiveCN105496522APrevent outflowEasy to controlSurgical needlesCatheterSyringe needleBiomedical engineering
The invention relates to a sleeve type lumbar puncture needle and a use method thereof. The technical scheme of the invention is that the sleeve type lumbar puncture needle comprises a cylindrical needle head with an inner cavity, a handle with a communicating pipe cavity, and a trocar, wherein the needle head is provided with a first liquid outlet hole and a second liquid outlet hole; the trocar has a cylindrical structure matched with the inner cavity of the needle head and a through hole cavity; and the trocar is provided with a first liquid inlet hole, a second liquid inlet hole and a third liquid inlet hole. The sleeve type lumbar puncture needle provided by the invention has the technical effects that: a transparent observation window or a transparent handle is arranged to observe whether cerebrospinal fluid flows out or not intuitively and visually, the flow is controlled precisely when liquid is taken, the operation is convenient, and the setting and matching of the mutual positions between the first liquid outlet hole and the second liquid outlet hole, and the first liquid inlet hole, the second liquid inlet hole and the third liquid inlet hole enable the liquid outgoing manner and the liquid outgoing volume can be flexibly adjusted according to requirements of on-scene patients or operators. The sleeve type lumbar puncture needle is convenient to use, is safe and reliable, and is long in service life, accurate in adjustment, and complete in function.
Owner:韩功篑
Magnetic resonance imaging apparatus and method
ActiveCN103356190BAppropriate dynamic visualizationImage enhancementMedical imagingResonanceDynamic visualization
Owner:TOSHIBA MEDICAL SYST CORP
An automatic speed measurement and automatic pulse cleaning device for external drainage of cerebrospinal fluid
InactiveCN106806953BAffect treatmentAutomatically resolve hidden dangersMedical devicesIntravenous devicesCavitationGear wheel
Owner:SHENGJING HOSPITAL OF CHINA MEDICAL UNIV
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