91 results about "Recording electrode" patented technology

The invention discloses a closed-loop deep brain regulation and control system for epilepsy treatment, and the system comprises an electroencephalogram signal collection module which collects neural electrophysiological signals in real time by implanting a recording electrode in a cerebral cortex or hippocampal brain area; the electroencephalogram signal real-time analysis module is used for outputting the epileptic seizure period prediction probability xi through a seven-layer full-connection neural network based on the 33-dimensional feature vector so as to realize epileptic seizure early warning; when the zeta is greater than or equal to a threshold value, the electrical stimulation regulation and control module is used for triggering electrical stimulation, filtering out a frequency band required to be regulated and controlled according to filtering, calculating and predicting electrical stimulation intensity and then correcting and outputting pulse stimulation, so that personalized electrical stimulation regulation and control are carried out on a specific frequency band, and detection is continuously carried out until the frequency band becomes normal; and the medicine intervention module is used for triggering a micro-injection pump to carry out medicine infusion through a pulse signal. According to the system, epilepsy treatment is improved from empirical parameter adjustment to accurate regulation and control based on real-time nerve physiological signals, and a safer and more effective treatment choice is provided for a drug-refractory epilepsy patient.

Police officers use conducted electrical weapons (“CEWs”) and cameras. A camera and a CEW may cooperate to improve the performance and use of the CEW and evidence collection by the camera. A camera and a CEW may also cooperate to improve the safety of the user and the target. Improvements may include improving targeting of the CEW, identifying and classifying body parts of the target as suitable or unsuitable for electrode deployment, adjusting electrode trajectory prior to launch, and automating electrode launch. Evidence collection may be improved by recording placement of electrodes on the target. Safety of the target may be improved by monitoring the movements of the target and altering characteristics of the delivered stimulus signal if potential harm to the target may occur.

An optical probe includes a probe body and a shank extending from the probe body to a tip. The tip includes a first plurality of light emitting diode pixels and a first plurality of recording electrodes. The first plurality of light emitting diode pixels includes a first light emitting diode and a second light emitting diode, wherein the first light emitting diode and the second light emitting diode emit a different color of light. The first plurality of light emitting diode pixels are arranged in groups. The light emitting diode pixels and groups of pixels are arranged in a particular manner. Methods for the manufacture of the probe and methods of using the probe are also described.

The invention relates to a metal contact corrosion evaluation method and system based on a Tafel polarization curve, and the method comprises the steps: installing a to-be-evaluated sample in an electrochemical testing device, and simulating the corrosion condition of a working environment; carrying out linear polarization scanning on the to-be-evaluated sample by adopting an electrochemical workstation, recording changes of electrode potential and current density, and generating a Tafel polarization curve; a strong polarization interval is selected according to the measured Tafel polarization curve data, and Tafel curves of the anode and the cathode are obtained through mathematical fitting; and calculating the corrosion potential and the corrosion current density based on the Tafel curves of the anode and the cathode obtained by fitting. Compared with the prior art, through accurate mathematical fitting and calculation, the accuracy and reliability of corrosion parameters are ensured, and the corrosion tendency and corrosion rate of the metal material can be accurately evaluated. And an effective technical means is provided for evaluating the corrosion performance of the metal material.

The invention provides an underground engineering leakage three-dimensional detection method, which comprises the following steps of: arranging a three-dimensional electrode system on an outer side and an inner side drill hole of a to-be-detected underground enclosure structure, and detecting and recording potential data and space coordinates of an electrode array; repeatedly collecting and preprocessing the collected potential data to eliminate the influence of current intensity difference and stratum conductivity difference; based on the physical coupling relationship between the electric field intensity and the formation resistivity, filling the data blind area of the inter-hole area; the three-dimensional space model of the electric field intensity is optimized and fitted through an intelligent algorithm, a three-dimensional equal-straight-plane image of the electric field is generated after data reliability is verified, and space coordinates of an electric field abnormal area are marked as suspected leakage points. The problems that in an existing detection method, positioning is not accurate, and the applicability is limited are solved.

The invention provides a device and system implanted outside epidural under ultrasonic guidance for temporary electrode stimulation of spinal cord, and the device comprises a risk assessment module which carries out the comprehensive assessment of a patient through a multi-modal risk assessment model, and outputs a risk level or probability; the configuration selection module is used for analyzing the parameter information of the patient according to the parameter information of the patient when the evaluation result is passed, and setting guide configuration requirements; the probe guiding module guides the temporary electrode through an ultrasonic thermodynamic diagram; the effect test module is used for testing electrode functions by using a stimulator and adjusting electrode positions; the fixing and closing module fixes the electrode to avoid displacement; and the recording and monitoring module is used for recording electrode implantation depth, stimulation parameters and patient response. The system can reduce invasiveness and ultrasonic guidance accurate positioning, reduces errors and complications, is easy to popularize and apply, is relatively simple to operate, and is suitable for being popularized and applied in more medical places.

The invention relates to the field of medical equipment, in particular to a biodegradable peripheral nerve interface with monitoring and repairing functions and a preparation method. The nerve interface is made of a biodegradable material and comprises a double-layer recording electrode array used for monitoring nerve signals of peripheral nerves; and the primary battery is used for providing an electric signal so as to promote repair of the damaged peripheral nerve. According to the biodegradable peripheral nerve interface provided by the embodiment of the invention, the nerve interface is made of the biodegradable material, so that a secondary operation required by implanting a non-degradable material can be reduced, the infection risk is reduced, and meanwhile, the integrated design of the double-layer recording electrode array and the primary battery is adopted, so that the cost is reduced. The dual functions of monitoring of neural signals and electrical stimulation repair are achieved, and the neural interface can effectively promote nerve regeneration and repair.

The invention discloses a closed-loop electrical stimulation regulation and control system based on a tissue state, and relates to the field of medical apparatuses and instruments. The system comprises a recording electrode, an amplifier, a neural signal acquisition system, a pulse stimulator and a stimulating electrode. The nerve electrophysiological signals are recorded and analyzed in real time through the nerve electrode, the power of the regeneration sensitive or pain sensitive frequency band representing the tissue regeneration or pain state is extracted from the nerve electrophysiological signals, and electrical stimulation is carried out according to the power of the regeneration sensitive or pain sensitive frequency band for regulation and control, so that organ regeneration is promoted, organ functions are recovered, or pain response is inhibited, and the tissue regeneration or pain treatment effect is improved. Damage to tissues caused by electrical stimulation is reduced, and the safety of electrical stimulation is improved.

The present disclosure relates generally to the field of neurological disease treatment, and in particular to devices and methods for treating neurological diseases based on adaptive stimulation, and methods for controlling such devices. In particular, the present disclosure relates generally to a neurological disease adaptive treatment device (10) including an implantable electrode (11) configured to sense neural activity signals and apply electrical stimulation signals, and a processing and stimulation unit (14) connected to the implantable electrode (11). The processing and stimulation unit includes at least a stimulation module (16) configured to generate a stimulation signal delivered by the implantable electrode (11), the stimulation signal characterized by at least one stimulation parameter, an acquisition module (20) configured to record a neural activity signal record of the neural activity signal sensed by the implantable electrode, and a processing module (18). The processing module (18) is configured to process the neural activity signal recordings recorded by the acquisition module (20) based on a first control logic (22) and adjust at least one stimulation parameter (A) based on the at least one neural activity signal recording processed according to the first control logic (22), the first control logic being a function dependent on at least one signal feature (Fi) of the neural activity signal recordings and composed of a plurality of different function elements based on at least one control parameter (Cj), each function element of the plurality of different function elements being associated with a respective range of the at least one signal feature (Fi), and the processing module (18) is configured to process the neural activity signal recordings recorded by the acquisition module (20) based on a second control logic (23) and adjust the at least one control parameter (Cj) of the first control logic (22) based on the at least one neural activity signal recording processed according to the second control logic (23).

The present disclosure is directed to neural interface devices and methods that accesses the subarachnoid space to enable minimally invasive modulation and recording of neural structures. Exemplary embodiments may comprise an implantable pulse generator and a microelectrode catheter. In particular embodiments, the microelectrode catheter comprises one or more stimulating and recording electrodes. Exemplary embodiments may also include methods comprising performing a lumbar puncture to access the spinal subarachnoid space and advancing microcatheter through the spinal subarachnoid space.

A neural stimulus comprises at least three stimulus components, each comprising at least one of a temporal stimulus phase and a spatial stimulus pole. A first stimulus component delivers a first charge which is unequal to a third charge delivered by a third stimulus component, and the first charge and third charge are selected so as to give rise to reduced artefact at recording electrodes. In turn this may be exploited to independently control a correlation delay of a vector detector and an artefact vector to be non-parallel or orthogonal.

The subject matter of the present invention is "System and method for visualizing electrophysiological data." The present invention discloses a method and system for visualizing electrophysiological information sensed by electrodes on a catheter, the method and system comprising recording the time of electrode signal acquisitions, calibrating a reference electrode signal acquisition, specifying a relative time of each recorded time of an electrode signal acquisition relative to the reference electrode signal acquisition, identifying the electrodes having signal acquisitions, associating the specified relative times with the identified electrodes to generate an electrode signal acquisition sequence, and generating a visual representation of the electrode signal acquisition sequence using a graphical image of the electrodes, wherein individual electrodes are visually labeled to represent the electrode signal acquisition sequence.

The present invention discloses an esophageal PH-electromyographic combined electrode catheter, comprising a tube body, a PH wire and a diaphragm wire, wherein the surface of the tube body is provided with two PH electrodes, a plurality of diaphragm electrical signal recording electrodes and a diaphragm electrical signal reference electrode; the two PH electrodes are respectively at the end and the middle of the tube body, the plurality of diaphragm electrical signal recording electrodes are all located between the two PH electrodes, and the diaphragm electrical signal reference electrode is located at the proximal end of the PH electrode in the middle; all the PH electrodes are connected to the PH wire in the tube body, and the signal output end of the PH wire is provided with a PH processor connector; the diaphragm electrical signal reference electrode and all the diaphragm electrical signal recording electrodes are connected to the diaphragm wire in the tube body, and the signal output end of the diaphragm wire is provided with an amplifier connector. The present invention can not only improve the accuracy of catheter positioning and simplify operation, but also reduce the patient's discomfort, and can also detect diaphragm function and help discover the cause of gastroesophageal reflux.

The nerve monitoring device comprises an interface box, a monitor and a tested body, the interface box is connected with the monitor, the interface box is connected with a recording electrode, a grounding subcutaneous needle, a stimulation loop subcutaneous needle and a stimulation probe, a trachea cannula is arranged on the recording electrode, and the stimulation probe is arranged on the grounding subcutaneous needle. The recording electrode, the grounding subcutaneous needle, the stimulation loop subcutaneous needle and the stimulation probe are all arranged on a tested body. According to the nerve monitoring device with the telescopic electrode, nerve walking can be effectively positioned and recognized, nerve point physiological function feedback can be provided in real time in an operation, potential risk or high-risk operation of nerve injury can be warned in advance, the safety and thoroughness of the operation are improved, the nerve monitoring electrode can be stretched out and drawn back, the nerve monitoring device is suitable for patients of different body types, and the operation efficiency is improved. In addition, the electrode probe can be retracted for protection, infection is not prone to being caused, and nerve monitoring data can be conveniently collected, transmitted, processed, analyzed and stored.

A neural stimulation and recording electrode assembly includes a selectively deformable guide tube. The guide tube includes a plurality of sequentially coupled connecting structures, wherein each connecting structure of the plurality of connecting structures has a respective central axis, and wherein at least one of the plurality of connecting structures is selectively deformable relative to the central axis of a sequential connecting structure of the plurality of connecting structures such that the central axis of the selectively deformable connecting structure is angularly oriented relative to the central axis of the sequential connecting structure. The electrode assembly further includes an electrode subassembly having a central axis and a plurality of electrode contacts that are configured for selective radial movement about and between a retracted position and a deployed position, wherein in the deployed position, and relative to the central axis, each electrode contact is spaced radially outwardly from the retracted position.

A neurostimulation system includes a plurality of stimulation electrodes, a plurality of recording electrodes, a waveform generator in electrical communication with the plurality of stimulation electrodes, and one or more computing devices in electrical communication with the plurality of recording electrodes and the waveform generator. The one or more computing devices cause the waveform generator to electrically excite the plurality of stimulation electrodes of the plurality of stimulation electrodes. After electrically exciting the stimulation electrodes, a neural signal is received from the plurality of recording electrodes. The neural signal is determined to be an electrically evoked compound action potential (“ECAP”) by determining one or more features of the neural signal. One or more stimulation parameters are determined based on one or more characteristics of the ECAP. The waveform generator is then caused to electrically excite the plurality of stimulation electrodes according to the one or more stimulation parameters.

An electrocorticographic interface device includes a flexible thin-film electrode array formed on a biocompatible substrate such as polyimide, the electrode array having a plurality of recording electrodes and interconnect lines patterned on the biocompatible substrate, and the flexible thin-film electrode array further includes an array of perfusion holes distributed across the biocompatible substrate.

Disclosed is a system and method for obtaining an electrical recording data comprising: providing an object of interest which is at least partially located in a recording environment; providing at least one signal recording electrode or a transducer, which is adapted to conduct or transduce a signal data of interest from the object of interest; obtaining the signal data of interest; obtaining a noise data from a location within the recording environment; modulation of a signal to remove noise; and obtaining a noise cancelled data, the obtaining of the noise cancelled data including subtracting the noise data from the signal data of interest.

The invention relates to the technical field of process regulation and control, and particularly discloses a method and equipment for detecting and controlling the residual length of an electrode in a nano powder preparation process. The method comprises the following steps: recording the average voltage U of an electric arc within a period of time t when an electrode is at different heights H, and obtaining the average electric field intensity EH of the electric arc corresponding to the different heights H; a relational expression between the distance h between the electrode sheath gas outlet and the molten pool and the electrode sheath gas pressure P is simulated; the arc voltage U'and the electrode sheath gas pressure P of the electrode at a certain height H are recorded, so that the arc length Larc is calculated, and h can be calculated by substituting the electrode sheath gas pressure P into a formula; and deducting the arc length Larc from the distance h between the electrode sheath gas outlet and the molten pool to obtain the electrode length Lel. According to the invention, the system is provided with instruments, so that the material depth and the electrode length can be continuously monitored on line in a non-stop state.

This disclosure relates to medical implant systems and apparatuses capable of treating a seizure condition through the use of recording and stimulating electrodes. The apparatus includes an internal pulse generator in communication with a wireless communication module; one or more recording electrodes in communication with the internal pulse generator, wherein the one or more recording electrodes are configured to monitor to detect one or more field potentials produced by neural tissue in proximity to the one or more recording electrodes; one or more stimulating electrodes in communication with the internal pulse generator, wherein the one or more stimulating electrodes are configured to stimulate the vagus nerve.

The application relates to the technical field of clinical medicine, and particularly discloses a lower limb nerve detection method and device in artificial total hip arthroplasty. The method comprises the following steps: acquiring performance state data of a lower limb nerve detection device, monitoring intraoperative environment data of artificial total hip arthroplasty, comprehensively analyzing to obtain a nerve detection accuracy evaluation value; recording electrode pair waveform data, comprehensively analyzing to obtain an electrode pair waveform abnormality evaluation value; correcting a parameter according to the waveform abnormality evaluation to obtain a waveform abnormality evaluation threshold value, and performing abnormality feedback. The application provides a lower limb nerve detection method and device in artificial total hip arthroplasty, which can help doctors to identify the existence and degree of nerve injury, help to distinguish different types of nerve injury, and thus formulate a targeted treatment scheme, can accurately locate the nerve injury, and can also monitor the recovery progress of the nerve function, help to timely adjust the treatment scheme, and improve the treatment effect.

The application relates to the technical field of physiological and pharmacological experimental devices, and discloses a muscle spindle discharge activity experimental recording device based on a nerve-muscle specimen, which comprises an experimental box, a tension sensor is fixedly connected to the left side of the experimental box, an electric sliding rail is fixedly connected to the right side of the experimental box, a wire clamp is arranged in the electric sliding rail, a movable adjusting mechanism is arranged at the back of the experimental box, an auxiliary placing mechanism is arranged in the experimental box, an adjusting and mounting mechanism is arranged at the bottom of the experimental box, in the using process, the sliding plate is moved, the spring is matched, the position of the connecting frame is adjusted, the left and right positions of the recording electrode clamp are adjusted, the first threaded rod is rotated, the first limiting rod is matched, the height and the front and back positions of the recording electrode clamp are adjusted, the motor works, the height of the silica gel support table is adjusted, the worm is rotated, the position of the mounting frame is adjusted, and the mounting between different mounting tables and mounting equipment is satisfied.

Stimulation and recording electrode assemblies that are particularly useful for Automatic Period Stimulation (APS). Such embodiments are compatible with nerve monitoring systems to provide continuous stimulation of a nerve during surgery. Certain embodiments include an electrode assembly having cuff including a body and two ears extending from the body. Within the body, at least one electrode is supported and connected to a lead wire assembly. The ears can be brought together to enlarge a gap in the body so that the electrode assembly can be fixated around a nerve. Other embodiments include an electrode assembly including first and second needle electrodes that each have a tip. A body is provided to interconnect the needle electrodes and can be manipulated to move the tips either toward or away from one another. Disclosed embodiments provide nerve monitoring and stimulation in cases where the nerve is only partially dissected.

The present invention discloses a real-time ultrasonic stimulation electric signal recording chip and a preparation method thereof, where the preparation method includes the following steps: S1 manufacturing an interdigital electrode on a piezoelectric substrate to obtain a surface acoustic wave chip, and manufacturing a recording electrode and an electrode lead; S2, manufacturing an insulation protection layer on the chip obtained in the S1, and processing the insulation protection layer to form the recording electrode, so as to obtain a chip combining the interdigital electrode and the recording electrode; S3, preparing a PDMS cavity; and S4, bonding the PDMS cavity prepared in the S3 and the chip obtained in the S2. In the present invention, combining the interdigital electrode generating a surface acoustic wave ultrasound with a multi-channel recording electrode, such that real-time recording of a multi-channel electric signal under ultrasonic stimulation is achieved.

A computer-implemented method for predicting the outcome of an endovascular stroke treatment in a patient in need thereof before the endovascular treatment is performed in the patient. The method comprises the use of an apparatus characterised by comprising: a stimulator for providing electrical stimuli to one or more pairs of stimulating electrodes for stimulating a nerve; a voltmeter connected to one or more pairs of recording electrodes for recording a somatosensory evoked potential (SEP) resulting from the electrical stimuli provided to the nerve; and a processor.

The invention discloses an acoustoelectric signal decoding method based on coherent demodulation. The method comprises the following steps: (1) focusing ultrasonic scanning and ultrasonic excitation signal recording; (2) ultrasonic excitation coded acoustoelectric signal acquisition: focused ultrasound acts on a scanning area, and a target bioelectric current source signal is coded through an ultrasonic excitation signal; at each scanning point, measuring the electric signal under the ultrasonic coding by using a recording electrode to obtain an acoustoelectric signal; (3) coherent demodulation and decoding of the acoustoelectric signal: taking the ultrasonic excitation signal as a coherent carrier wave, realizing coherent demodulation by multiplying a modulated carrier wave and a coherent carrier wave with the same frequency and phase as the modulated carrier wave, mapping a coherent demodulation parameter variable to an acoustoelectric signal decoding process, and multiplying the acoustoelectric signal with the ultrasonic excitation signal to obtain a demodulation signal; and decoding the acoustoelectric signal to obtain an acoustoelectric signal decoding result of the target current source signal.

The invention discloses a detection device and method for animal foraging behavior decision, the detection device comprises a detection box body, a movable opening and closing door, a threatening robot, a position detection device and an in-vivo multi-channel electrophysiological recording electrode, the detection box body is internally provided with a nest area and an exploration area, and food to be taken is placed in the exploration area; a movable opening and closing door is arranged between the nest area and the exploration area, an experimental animal is placed in the nest area, an in-vivo multi-channel electrophysiological recording electrode is arranged in the body of the experimental animal, food to be fetched is placed in the exploration area, and a threatening robot and a position detection device are further arranged in the exploration area; the position detection device is arranged on one side of the to-be-fetched food and keeps a certain distance from the to-be-fetched food, so that the position detection device can detect the experimental animal firstly and send the starting signal to the threatening robot in time, behavior decision of the experimental animal after threatening in a real environment is realized, and the authenticity and accuracy of an experiment are improved.

A method may include obtaining first and second time series (TS1), (TS2) of stimulation data, and a first and second time series of control data. TS1, TS2 may provide a plurality of pairs of data points such that each of the plurality of pairs include corresponding data points from both TS1 and TS2. The obtained time series may be analyzed by applying an algorithm (Alg) to TS1 and TS2 of stimulation data to create an algorithm value corresponding to each of the plurality of pairs of data points. Alg=(|TS1|+|TS2|) / 2−|TS1−TS2|. Positive algorithm values for a predetermined period of time (AlgVarTime) may be summed to create a signal. Peak(s) in the signal may be determined, and a conduction velocity may be determined using a latency and a distance between a stimulus electrode and a recording electrode.

The present invention relates to an intraoperative structural function synchronous imaging device for brain tumor resection, comprising a multiplexed transducer, a recording electrode and a controller; the controller comprises a phase amplitude compensation module, a delay control module, a synchronous receiving module, an echo signal processing module, an acoustic-electric signal processing module and a synchronous imaging module; by multiplexing an ultrasonic transducer to generate an image according to acoustic-electric signals and echo signals, and synchronously correlating the images, key information such as neuroanatomy, tumor structure and functional areas can be provided in real time during the operation, and the tumor can be systematically guided to be removed, helping surgeons to make more accurate decisions and improving the accuracy and effectiveness of the operation.

Determining the force exerted by a catheter when it is inserted into tissue. [Solution] A method for performing a medical procedure is provided, which involves providing a probe having a known spring constant for insertion into a patient, wherein the probe has electrodes and position sensors at each location along the probe, and recording the relative position coordinates of the electrodes and position sensors when the probe is in an unrestrained state. While the probe is in the patient and deformed by contact with the patient's tissue, changes in the relative position coordinates of the electrodes and position sensors in contact with the tissue are recorded, and the shape of the deformed probe is calculated in response to the recorded changes. In response to the known spring constant and the calculated probe shape, the respective forces exerted by the tissue on each electrode are calculated, and the electrical signals from the tissue through the electrodes are controlled in response to the calculated forces on the electrodes.