73 results about "Intracranial pressure monitoring" patented technology

An intracranial pressure monitoring method based on magnetic induction phase difference change comprises the following steps of (1) arranging an exciting coil on the periphery of the brain and generating a drive signal with a frequency of 10MHz and power of 1w, wherein the drive signal transmits through the brain; (2) arranging a receiving coil on the periphery of the brain, wherein a superposition sensing signal of a signal of an induced magnetic field produced by the tested brain and a sensing signal of the exciting coil are picked up by the receiving coil; (3) conducting difference calculations on a phase of the drive signal and a phase of the superposition sensing signal of the receiving coil picked up in the step (2) through a computer to obtain a variable curve of magnetic sensing phase difference along with time; (4) obtaining a intracranial pressure value corresponding to a point on a changing curve of the magnetic sensing phase difference along with the time and a changing curve of intracranial pressure along with the time in step (2). By means of the monitoring method, the intracranial pressure can be monitored.

A monitor-driven intracranial catheter assembly including dual lumen catheter for monitoring intracranial pressure via a pressure sensor located in one lumen while simultaneously draining cerebrospinal fluid through another lumen. A third lumen can also be provided with a side port for receiving a stylet. The stylet is used as a stiffening agent to aid in advancing the catheter into the patient's brain. The pressure sensor is preferably a spectral modulation sensor that communicates with a photodetector apparatus by means of a single optical fiber, thus minimizing the diameter of the catheter. The photodetector is self-correcting for signal errors caused by temperature change, changes in intensity of the input light, and transmission losses within the optical apparatus. Moreover, the photodetector operates off the output voltage of the standard hospital monitor by “scaling” the signal from the monitor to provide a pressure measurement signal that emulates the output of a piezoresistive strain gauge sensor or Wheatstone bridge. Therefore, the entire catheter assembly is designed to be used with any of the common types of hospital monitors. The pressure monitoring catheter assembly can be used in any situation requiring very sensitive pressure measurements and can be zeroed and calibrated in situ.

The invention relates to a non-invasive intracranial pressure monitoring equipment, which comprises: a data collection device, which is a transcranial Doppler instrument; a data transmission device, which is used for converting the analog signal of the data collection device to the digital signal; a calculation and analysis device, which is a computer with a data analysis software, the calculation and analysis device receives the output signal of the data transmission device and can call the data in a database by a network; a display equipment, which is used for displaying the analysis results of the calculation and analysis device; an input-output equipment, which is used for the input of the operation command and the output of the analysis results of the calculation and analysis device. The invention can realize the long-term continuous detection, which not only has a convenient detection way, but also has reliable conclusions and high measurement accuracy.

The invention discloses an implantable intracranial pressure monitoring probe and belongs to human cranial cavity monitoring devices. The implantable intracranial pressure monitoring probe comprises a probe body, wherein a groove is formed nearby the middle of the probe body; a pressure sensor is mounted in the groove; a thermistor is further mounted in the front end of the probe body and placed at the front end of the pressure sensor; wires of both the thermistor and the pressure sensor extend to the tail end of the probe body and are wrapped by wire protecting sleeves; one end of each wire protecting sleeve extends into a butting opening in the tail end of the prove body and is fixedly connected with the inner wall of the butting opening, and the other end of each wire protecting sleeve extends out of the probe body. As the pressure sensor and the thermistor are both mounted on the probe, the probe can simultaneously measure the intracranial pressure and temperature to further eliminate interference on monitoring of intracranial pressure from the temperature; as the pressure sensor is mounted in the groove, after the groove is sealed, the pressure sensor cannot be in contact with external liquid, and accordingly, the pressure measurement accuracy is effectively improved.

The non-invasive intracranial pressure monitoring method adopts the flash eye-shield to give out standard photostimulation signal to human eye, said signal is sensed by retina and converted into electric signal, said electric signal can be picked up by detection electrode and undergone the process of amplifier treatment, then inputted into computer to display flashing visual evoked potential (FVEP) characteristic curve and define the peak latency of III wave, then the function relationship of intracranial pressure and peak latency of III wave, ICP=f(III Latency) can be used to display intracranial pressure value correspondent to wave peak (negative phase) point of III wave on the FVEP-Latency curve on the display screen.

The invention discloses an intracranial pressure monitoring drain tube and belongs to the technical field of intracranial drain tube devices. The drain tube comprises an intracranial pressure monitoring probe and a drain tube, wherein a rigid silicon rubber head is arranged at the front end of the drain tube, and a drain butt port is formed at the tail end of the drain tube; the intracranial pressure monitoring probe is embedded at the front end of the interior of the drain tube; a drain pore is formed on the lateral side of the drain tube; a rectangular hollow groove is formed in the middle of the intracranial pressure monitoring probe; a silicon substrate to which a pressure strain foil is attached is closely attached to the groove, and the periphery of the groove is completely sealed by silica gel; a first drain pore is formed on a part, corresponding to the pressure strain foil, of the top of the drain tube; and a thermocouple is arranged on the rigid silicon rubber head at the front end of the drain tube. By utilizing the intracranial pressure monitoring drain tube, the intracranial pressure is monitored in real time in an intracranial draining process, the hard silicon rubber head arranged at the front end causes less damage to brain tissues and nerve fibers; the first drain pore can be used for realizing drainage, and ensures that the pressure strain foil can be directly contacted with an external liquid, so that the monitored pressure is more accurate.

The invention relates to an airbag-based implantable wireless intracranial pressure monitoring system, comprising three parts: an intracranial pressure implantation monitoring device, an in vitro intracranial pressure data recorder, and a data management terminal, wherein the intracranial pressure implantation monitoring device comprises a shell, a gas conduit, an airbag, a gas check valve, a gas absolute pressure sensor, a temperature sensor, a control circuit, a wireless transceiver circuit, a battery, and an antenna, and the in vitro intracranial pressure data recorder comprises an antenna, a wireless transceiver circuit, a gas absolute pressure sensor, a control and data processing circuit, a display screen, and a battery. The in vitro intracranial pressure data recorder receives intracranial pressure data and intracranial temperature data measured by the intracranial pressure implantation monitoring device. The data is processed and then displayed on the display screen in real time, and the data management terminal can store and manage the intracranial pressure data for a long time. The method provided by the invention overcomes the shortcoming that the non-implantable intracranial pressure measurement method is easy to lead to infection. The airbag-based pressure measurement method has the advantages that a small opening is formed in the skull and the circuit is easily isolated from liquid.

The invention discloses an intracranial pressure monitoring system probe. The intracranial pressure monitoring system probe comprises a probe contact, and a control module which is connected with the probe contact; a storing unit is integrated to the control module; the control module is at least used for storing a null drift value acquired by the probe contact to the storing unit, and calibrating an intracranial state monitoring system probe according to the null drift value stored in the storing unit. Compared with the prior art, the intracranial pressure monitoring system probe has the advantages that the storing unit is additionally arranged in the control module and used for storing the null drift value, the calibration value can be called by software to remove error during use, and thus the automatic calibration can be realized under the matching of the software; the probe is convenient to use; the calibration value can be avoided being manually recorded by a doctor, and re-calibration is saved although a new terminal system is replaced.

An intracranial pressure monitoring instrument based on ultrasonic wave acoustoelastic effect comprises a computer, an ultrasonic wave transmitting drive module, an ultrasonic wave transmitter, an ultrasonic wave receiver and a receiving signal circuit module, wherein the ultrasonic wave transmitting drive module is used for generating initial high-frequency signals, the ultrasonic wave transmitter is connected with the ultrasonic wave transmitting drive module and converts the initial high-frequency signals output by the ultrasonic wave transmitting drive module into elastic mechanical waves transmitting to a cranial cavity, the ultrasonic wave receiver is used for receiving the elastic mechanical waves penetrating the cranial cavity and converting the received elastic mechanical waves into tail-end high-frequency signals, the receiving signal circuit module is connected with the ultrasonic wave receiver and used for performing frequency discrimination and phase locking to the tail-end high-frequency signals and outputting the phase, with the same frequency as the initial high-frequency signals, of the tail-end high-frequency signals to the computer, and the computer is connected with the ultrasonic wave transmitting drive module and the receiving signal circuit module and used for demodulating the tail-end high-frequency signals and calculating intracranial pressure. By the intracranial pressure monitoring instrument, noninvasive monitoring of intracranial pressure of patients is achieved, measuring data is accurate, the clinical application requirements can be satisfied, and long-term online monitoring is achieved.

The invention relates to an implanted intracranial pressure monitoring device, a monitoring system and a using method of the monitoring system. The implanted intracranial pressure monitoring device comprises a sensing module, and the sensing module comprises a flexible substrate layer, a pressure sensing chip and a flexible coating layer; the pressure sensing chip is positioned on the flexible substrate layer, and the flexible coating layer at least coats the pressure sensing chip; the sensing module is embedded between skull and dura mater; and an in-vitro data reader matching with the implanted intracranial pressure monitoring device is used for realizing power supply, control and data transmission and reading of the implanted intracranial pressure monitoring device through wireless electromagnetic waves. According to the invention, the flexible substrate layer is used as the substrate of the implanted intracranial pressure monitoring device, and a core mainboard with low power consumption and an absolute pressure sensor with high precision, miniaturization and high reliability are adopted, so that the device has the advantages of long implantation service life, accurate monitoring, good stability, good safety and convenient implantation.

The invention belongs to the technical field of brain surgery monitoring instruments, and particularly relates to an intracranial pressure monitor. A drainage hole is formed in the drainage end of a drainage pipe; the drainage pipe is sleeved by an inflation air bag 1 close to the drainage end; a drainage conduit is sleeved by an air inflation device capable of sliding along the drainage pipe; the drainage pipe comprises a drainage cavity and a pressure measuring cavity; the end part of the drainage cavity is fixedly connected with a drainage branch pipe joint; the end part of the pressure measuring cavity is fixedly connected with a pressure measuring branch pipe joint; the pressure measuring branch pipe joint is connected with a detection display through a pressure sensing device; the side surface of the monitoring display is provided with a pressure sensor line box, a power line box and a display screen; and winding lead posts and jacks are respectively arranged in the pressure sensor line box and the power line box. The intracranial pressure monitor is capable of simultaneously carrying out drainage of cerebrospinal fluid and measurement of intracranial pressure, realizing real-time monitoring, saving time for rescue; in addition, infection is not easily caused due to a plurality of openings, the intracranial pressure monitor does not easily fall off from the openings, and the pain of a patient is relieved.

The invention belongs to the technical field of medical equipment and discloses a monitoring system and a method based on the linear relationship between intraocular pressure and intracranial pressure. The monitoring system comprises an information integration module, an intraocular pressure measurement module, a vital signs monitoring module, and a lumbar cistern pressure monitoring module. The intraocular pressure measuring module, the vital signs monitoring module, and the lumbar cistern pressure monitoring module are mutually independently connected with the information integrating moduleand do not affect each other. The vital sign monitoring module comprises an electrocardiogram monitoring unit, an invasive artery pressure monitoring unit and a dual-frequency electroencephalogram monitoring unit. The data are integrated through an information integration module for information display, information storage and integration with the information. Based on the linear relationship between intraocular pressure (IOP) and intracranial pressure (ICP), the system indirectly reflects the change of ICP by measuring IOP, and provides an effective non-invasive monitoring method for ICP during general anesthesia.

A non-invasive pressure monitoring system includes a first sensor placed proximate to a perfusion field of an artery receiving blood which emanates from the cranial cavity is configured to measure pulsations of the artery receiving blood which emanates from the cranial cavity artery and generate first output signals. A second sensor placed proximate to a perfusion field of an artery which does not receive blood emanating from the cranial cavity configured to measure pulsations of the artery which does not receive blood emanating from the cranial cavity and generate second output signals. A third sensor is configured to measure one or more physiological parameters of the human body and generate third output signals. A processing system responsive to signals from the first, second, and third output signals is configured to determine intracranial pressure.

The invention provides a modification algorithm-based method for extracting simplex-wave feature points of intracranial pressure signals. The method comprises the steps of: denoising the intracranial pressure signals with a lifting wavelet transform method, primarily extracting the extreme point of each simplex wave in the intracranial pressure signals by windows, judging the accuracy of the extreme points through a modification algorithm, rejecting false feature points one by one, and finding out missed feature points, thereby guaranteeing the accuracy on identifying the feature points. The invention provides the method for extracting the simplex-wave feature points of the intracranial pressure signals by employing a computer platform as an application foundation so as to realize the automatic extraction of the simplex-wave feature points of the intracranial pressure signals by a computer; by taking the method disclosed by the invention as a foundation, the calculation of the feature parameters of each simplex wave by intracranial pressure signal analysis equipment is further facilitated, and the calculation precision on the simplex-wave feature parameters of the intracranial pressure signals is improved, therefore, rich clinical diagnosis information is obtained, the analysis and early warning capability for the intracranial pressure variation tendency is enhanced during clinical intracranial pressure monitoring, and the method has a broad application prospect in the medical equipment industry.

The invention discloses an intracranial pressure monitoring method and device. The monitoring method comprises the steps that a pressure sensor is connected with a pressure measuring probe, and a pressure transmission path from a thin film to the pressure sensor is formed; the pressure measuring probe is implanted into the ventricle of a patient, and intracranial pressure is conducted to the thinfilm of the pressure measuring probe by using cerebrospinal fluid in the ventricle; the cerebrospinal fluid pressure change is converted into a grating signal through the pressure sensor; the gratingsignal is transmitted to a photoelectric analysis module through an optical fiber, so that the photoelectric analysis module converts the grating signal into an electric signal; and digital-to-analogue conversion is carried out on the electric signal to obtain a pressure waveform representing the intracranial pressure and the pressure waveform is displayed. Operation such as drainage can be carried out while monitoring is carried out, due to the fact that the size of the pressure measuring probe is relatively small, and meanwhile an optical fiber sensor and the corresponding optical fiber arerelatively thin, drilling insertion of the pressure measuring probe can be achieved, detection is carried out according to the medium conduction principle, the principle of a communicating vessel is not needed, operation is easy, and cerebrospinal fluid drainage can be carried out synchronously.

The invention relates to the technical field of ventricular drainage devices, and discloses a ventricular device. The device comprises a drainage tube, a drainage bag and a controller. The drainage end of the drainage tube is placed in the cerebral ventricle, the other end of the drainage tube is connected to the drainage bag, the drainage tube is provided with an electromagnetic pinch valve and afirst pressure sensor, the first pressure sensor and the electromagnetic pinch valve are connected to the controller, the controller is connected with a prompt device and a control input device, thecontroller is also connected with an intracranial pressure monitoring device, and the intracranial pressure monitoring device comprises an intracranial pressure monitoring probe extending into the brain. According to the ventricular drainage device of the present invention, the adjustment and control of drainage can be realized according to the set pressure value, the drainage is not affected by the posture of patients, the medical staff can be reminded in time when the drainage tube is not smooth, the use safety is ensured, the intracranial pressure of patients can be more accurately controlled, and the device is conducive to the improvement of the prognosis of patients.

The invention discloses a pressure monitoring and regulating device for an in-vitro drainage system and relates to a neurosurgery medical instrument. The pressure monitoring and regulating device is provided with a monitoring plate, wherein the monitoring plate is provided with a permanent seat and is vertically provided with a sliding chute; one side of the sliding chute is horizontally provided with water column scale lines and water column scale marks; the monitoring plate on the other side of the sliding chute is horizontally provided with mercury column scale lines and mercury column scale marks; the '0' water column scale line and the '0' mercury column scale line are arranged on the same horizontal plane; a regulating slip sheet is arranged in the sliding chute and is provided with a locking knob; the lower part of the regulating slip sheet is provided with a connecting seat; the connecting seat is vertically provided with an intracranial pressure regulation bottle; the outer wall of the intracranial pressure regulation bottle is provided with a liquid inlet position marker line; the upper end of the monitoring plate is provided with a level gauge; the parts, corresponding to a water column reference scale line and a mercury column reference scale line, of the monitoring plate are provided with locating laser pens; and one side of the monitoring plate is provided with an intracranial pressure monitor mounting plate. The height of the intracranial pressure regulation bottle is convenient to regulate, and the intracranial pressure data obtained by observation is precise and reliable.

The invention discloses an implantable wireless passive intracranial pressure monitoring system. The system comprises an intracranial pressure monitor and an in vitro detector, the intracranial pressure monitor is implanted into a cranium and comprises a shell, a pressure sensor and a circuit module, the pressure sensor is a piezoresistive pressure sensor, thin high-elastic layers are arranged atthe upper end and the lower end of the shell, the circuit module comprises a wireless charging module, a signal transmission module and a signal processing module, the pressure sensor is connected with the circuit module through a long wire, and the intracranial pressure monitor is connected with the in vitro detector through a wireless signal. The system is characterized in that the work time ofmonitoring equipment can be greatly prolonged, the risk that a patient is infected when using the system is reduced, the cost of the patient on the medical services is reduced, the accuracy and convenience of clinical doctors on pathogenic condition judgement is improved, the work quality of the neurosurgery department is improved, and the clinical academic research level is improved.