109 results about "ICP - Intracranial pressure" patented technology

A system for measuring and converting to an observer intelligible form an internal physiological parameter of a medical patient. The invention allows transcutaneous telemetry of the measured information intracranial pressure via a system which includes a patient implanted sensor module and a processing and display module which is external of the patient and optically coupled to the sensor module via an external coupling module. A sensor within the implanted module transduces the measured information and a near infrared (NIR) emitter transmits this telemetry information when interrogated by the complementary external coupling module. Power for the sensor module is derived inductively through rectification of a transcutaneously-applied high-frequency alternating electromagnetic field which is generated by a power source within the external coupling module, in concept much like a conventional electrical transformer. A computer within the processing and display module calculates the parameter value from the NIR telemetry signal and represents this data either in numerical, graphical, or analog format.

A non-invasive method and apparatus for monitoring changes in intracranial pressure which removes extracranial effects from the measurements. The method and apparatus can include the supplying of a fixed frequency electrical output to a transducer coupled to the patient's head, thereby generating an acoustical tone burst in the patient's head which generates a first echo and a second echo, the first echo reflecting from a first interface in the side of the patient's head coupled to the transducer, and the second echo reflecting from a second interface at the opposite side of the patient's head. The first and second echoes are received by the transducer which can generate a first electrical signal and a second electrical signal, wherein the first and second electrical signals vary in accordance with the corresponding first and second echoes. The counterbalancing phase shifts required to bring about quadrature between each of the first and second electrical signals and the fixed frequency electrical output can be measured, and values for the change in intracranial distance based on the changes in the counterbalancing phase shifts can be obtained.

Methods, systems, and related computer program products for are described for non-invasive detection of intracranial pressure (ICP) variations in an intracranial compartment of a patient. Optical radiation is propagated transcranially into the intracranial compartment, and optical radiation that has migrated through at least a portion of the intracranial compartment and back out of the cranium is detected. At least one signal representative of the detected optical radiation is processed to extract therefrom at least one component signal that varies in time according to at least one of an intrinsic physiological oscillation and an externally driven oscillation in the patient. Examples of suitable intrinsic physiological oscillations include intrinsic respiratory and cardiac oscillations. Examples of suitable externally driven oscillations include ventilated respiratory oscillations and externally mechanically induced oscillations. The extracted component signal is then processed to generate an output signal representative of the ICP variations in the intracranial compartment.

The invention provides a multi-parameter-based intracranial pressure noninvasive detection method and device. The method comprises the following steps of: pre-establishing an intracranial pressure evaluation function model for recording a function mapping relation between the change of the intracranial pressure and the changes of an electrocardiosignal, a visual evoked potential signal, a brain impedance signal and a transcranial Doppler ultrasonic signal and setting in a computer; and synchronously acquiring the electrocardiosignal, the visual evoked potential signal, the brain impedance signal and the transcranial Doppler ultrasonic signal into a computer and inputting the signals serving as the intracranial pressure evaluation function model to obtain the dynamic change process waveform of the intracranial pressure of an inspected object by performing multi-parameter and multi-direction operation. Due to the adoption of the method, invasive intracranial pressure detection is avoided; the device for implementing the method is easy to obtain; and meanwhile, various physiological and pathological signal parameters causing the change of the intracranial pressure are considered comprehensively in the intracranial pressure evaluation function model, so that the intracranial pressure noninvasive detection method has higher clinical detection accuracy.

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 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.

The invention discloses a rechargeable implantable automatic pressure regulating and diverting system with a program control function, and belongs to the field of medical instruments. The system includes a passage control valve, a pressure sensing system, a self-generating energy collecting system, an external control system and a drainage tube. Through the pressure feedback of the pressure sensing system and the adjustment of the external control system, the passage control valve adjusts the opening pressure or flow of a hydrocephalus valve, and drains intracranial cerebrospinal fluid to another suitable position in the body through the drainage tube, electricity required by various systems is supplied by the self-generating energy collecting system, and the drain tube is provided with ananti-freezing and antibacterial drug coating layer. The system can monitor the intracranial pressure in real time, adjust the pressure autonomously, effectively reduce related complications such as excessive or insufficient diversion, drain tube clogging, infection and the like.

The invention provides a brain disease judgment system based on intracranial multi-modal information fusion of machine learning. The judgment system comprises an input layer and an output layer, wherein intracranial information is input into the input layer, multi-level processing of data is carried out, various intracranial injury types are automatically judged and output. An intervention treatment combination is specified according to the type combination of the output layer, wherein the intracranial information comprises intracranial pressure, intracranial oxygen partial pressure, intracranial temperature, intracranial electroneurographic signals, intracranial sodium ion concentration and intracranial potassium ion concentration.

The invention discloses a sealing structure and testing system of a probe, the probe is used to detect intracranial pressure, the probe includes a sensor, a probe joint, and a wire connecting the sensor and the probe joint, wherein the sealing structure includes a surrounding A protection tube around the periphery of the wire and a sealing joint surrounding the periphery of the protection tube. The sealing structure of the probe and the testing system have good sealing effect, high product quality and high working efficiency.

The invention discloses a craniocerebral three-dimensional forming restoration with a muscle base window. According to the craniocerebral three-dimensional forming restoration with the muscle base window, a medical three-dimensional forming material serves as a substrate, multiple mesh holes are formed in the substrate, the craniocerebral three-dimensional forming restoration with the muscle base window is provided with a smooth outline edge, a suitable individualized muscle base window three-dimensional structure is reserved for the skull defect zone muscular tissue of a patient at the edge, close to the base of skull, of an outline, the tissue combinations such as the muscles, the meninx and the brain which are attached to a skull defect zone are located at the inner side of the craniocerebral three-dimensional forming restoration with the muscle base window, the outline radian of the craniocerebral three-dimensional forming restoration with the muscle base window are formed with the consideration of the distribution condition of the tissue combinations such as the muscles, the meninx and the brain in the skull defect zone, so that it is guaranteed that the skull and the brain are repaired and protected together, and symmetry and beauty of the skull and the brain at the two sides are considered. Compared with the prior art, the craniocerebral three-dimensional forming restoration with the muscle base window has the following advantages that the internal environments such as brain blood supply and intracranial pressure maintenance are improved and recovery of the brain functions is facilitated.

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 a pressure sensor, a preparation method and application thereof and intracranial detection equipment. The pressure sensor comprises an elastic polymer layer and a liquid metalfilled in the elastic polymer layer, a serpentine channel is arranged in the elastic polymer layer, and the liquid metal is filled in the serpentine channel. The pressure sensor is flexible and highin sensitivity.

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 device for non-invasive monitoring of intracranial pressure (1) includes a measuring mat (2), processor unit (3), device for recording electrical activity of the heart (4), device for invasive measurement of arterial blood pressure (5), imaging device 6 and network connector (7). The measuring mat includes the processor unit (3) and sensors, at least one sensor (8) monitoring mechanical movement caused by the bloodstream dynamics. The ICP calculation methods use the Windkessel model and the relation between the start of the R-wave and the time delay of the mechanical movement of the head, which is related to the reflection of the pulse wave in the head.

The invention provides a noninvasive optical measurement method of intracranial pressure, and belongs to the field of a biomedical technology. Near-infrared diffusion correlation spectroscopies are used, cerebral blood flow and heart beat pulsatility indexes are used for realizing measurement of intracranial pressure, and relationship of the intracranial pressure (ICP) and the heart beat pulsatility index PI is ICP=K *PI+b, wherein K and B express correction coefficients. Based on the near-infrared diffusion correlation spectroscopies, the cerebral blood flow (CBFI) change caused by heart beatcan be measured, and through the cerebral blood flow change (CBFI), the cerebral blood flow and heart beat pulsatility index (PI) can be obtained; and a principle that change of the intracranial pressure can cause the cerebral blood flow and heart beat pulsatility index (PI) is adopted, and the cerebral blood flow and heart beat pulsatility index (PI) is used for inversing the intracranial pressure (ICP) and change of the intracranial pressure.