47 results about "Recording electrode" patented technology

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 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.

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.

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 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.

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.

The invention relates to the technical field of culture, and discloses an in-vitro cell culture electrical stimulation and recording device which comprises four quarter frames, the four quarter frames are mutually combined to form an integral frame, and a connection adjusting assembly capable of adjusting the distance between every two quarter frames is arranged between every two quarter frames. The recording electrode array comprises a 1 / 4 frame, the side surfaces of the two sides of the 1 / 4 frame are each provided with a first inlaying groove, a stimulating electrode is detachably inlaid in each first inlaying groove, and a first fixing assembly used for fixing the stimulating electrode is arranged in each first inlaying groove. A standard plug-in type experiment unit is formed, a user only needs to put the whole device into a standard culture dish, complex electrode arrangement can be completed, and the experiment preparation process is greatly simplified.

Systems and methods for calculating patient information are provided herein. The method includes determining a transfer matrix, recording potentials via a first set of recording electrodes located at a first set of recording locations to create a first set of recording signals, and calculating patient information for a set of target locations by applying the transfer matrix to the first set of recording signals. The transfer matrix is a feature of an electrical characteristic of tissue between the first set of recording locations and a set of target locations.

Abnormal activity in the brain can be detected by identifying changes in tissue excitability measured in response to stimulation of fiber tracts such as the corpus callosum. A stimulating electrode contact can apply a stimulation to the fiber tract, which can have one or more terminals to a cortex of a patient's brain, and a recording electrode contact positioned in the fiber tract and / or the cortex to record a tissue excitability response to the stimulation. A controller can receive the tissue excitability response from the at least one recording electrode, identify a parameter of the tissue excitability response, and predict the abnormal activity in the patient's brain based on the parameter being different from a baseline for the parameter. When an abnormal activity is predicted the patient can be alerted to start a therapy and / or a therapy can be applied in closed loop manner by a connected therapy device.

The application relates to the technical field of process regulation, and particularly discloses a method and equipment for detecting and controlling the residual length of an electrode in a nanometer powder preparation process. In the method, the average arc voltage U of an electrode in a period t is recorded when the electrode is at different heights H, the average arc electric field intensity E corresponding to the different heights H is obtained H ; a relationship between the distance h of an electrode sheath gas outlet from a 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 L arc is calculated; the electrode sheath gas pressure P is substituted into the formula to calculate h; and the distance h of the electrode sheath gas outlet from the molten pool is deducted by the arc length L arc , so that the electrode length L ele is obtained. The application realizes uninterrupted online monitoring of material depth and electrode length under a non-stop state through a system instrument.

In one embodiment, the invention relates to systems, methods, and apparatus relating to the detection of a neuropathy such as a periopertive neuropathy. In one embodiment, a wristband comprising a plurality of anodes and cathodes is used. The wristband can be a component in a electrode array that includes a plurality of reference or recording electrodes. The electrode array can be configured to stimulate and collect responsive signals from an ulnar, a median, radial and posterior tibial nerve. The simulation and signal collection can be performed on a continuous basis for time periods of interest such as a given perioperative time period using a monitoring device.

The invention discloses a flexible electrode array for recording electroencephalogram signals. The flexible electrode array comprises a basic appearance structure and a metal wire layer. The basic outline structure comprises an upper packaging layer and a lower substrate layer. The metal wire layer is arranged between the upper packaging layer and the lower substrate layer, the metal wire layer comprises an array area, a strain release interconnection area and a connection area, one end of the strain release interconnection area is connected with the array area, the other end of the strain release interconnection area is connected with the connection area, the array area comprises a plurality of independent recording electrodes, each recording electrode is in a disc shape, and the recording electrodes are arranged in the array area. The wire of the strain release interconnection area is of a convolute geometric structure, and the connection area comprises at least one bonding pad. Wherein the recording electrode and the metal surface of the bonding pad are exposed out of the upper packaging layer through the windowing part. The high-quality electroencephalogram signals are obtained through arrangement of the disc-shaped recording electrodes and the multi-channel array electrodes, and the stability of the signals in long-term use is guaranteed by means of the strain release interconnection area in the convolute geometry shape.

Obesity and other medical conditions can be managed using a closed-loop system, which uses one or more implantable recording electrodes, a processing device, and one or more implantable stimulating electrodes. The one or more implantable recording electrodes can record signals from a portion of one or more subdiaphragmatic branches of a patient's vagus nerve. The processing device can be configured to: receive the signals from the portion of the one or more subdiaphragmatic branches of the patient's vagus nerve, perform signal processing to decode the signals from the portion of the one or more subdiaphragmatic branches of the patient's vagus nerve, and configure a stimulation to decrease the patient's hunger and / or increase the patient's satiety based on the decoded signals. The one or more implantable stimulating electrodes can deliver the configured stimulation to another portion of one or more subdiaphragmatic branches of the patient's vagus nerve.

This invention discloses a flexible electrode array, system, and manufacturing method for closed-loop neural modulation, relating to the fields of neural engineering, medical devices, and biosensor technologies. The flexible electrode array includes a flexible biocompatible substrate, a recording electrode array, and a stimulating electrode array. The recording sites are arranged in a matrix, and the stimulating sites are coplanar with the recording sites, located between or within rows of the recording electrode array, achieving a spatially co-located layout of recording and stimulation. The system also includes an external control unit for receiving neural signals acquired by the recording electrode array and dynamically adjusting the stimulation parameters applied to the stimulating electrode array based on the neural signals. This application improves biocompatibility, achieves high-resolution signal mapping, and enables efficient closed-loop neural modulation by shortening the spatiotemporal distance between stimulation and monitoring.

An intracardiac pulse field ablation (PFA) system comprising a catheter, a constant current AC signal generator, and at least one computing device, wherein the PFA catheter comprises at least a first constant AC current injection electrode, second and third sensing or recording electrodes, and a fourth ablation electrode, the PFA catheter and the electrodes thereof being configured to be operably connected to the constant current AC signal generator, and at least one computing device, the first electrode being a signal injection electrode configured to inject constant current AC signals into or near the patient's cardiac tissue, the second and third electrodes being recording or sensing electrodes configured and located sufficiently close to the first electrode to permit differential sensing and measurement of complex electrical impedance signals, including the phase and amplitude thereof, resulting from injection of the constant current AC signals into the cardiac tissue from the first electrode.

The application discloses a wireless flexible cortex brain-computer interface device based on ultrasonic energy supply and a signal acquisition method thereof. The device comprises an extracorporeal ultrasonic transceiving unit and a passive flexible intracorporeal implant unit. The intracorporeal implant unit comprises a flexible substrate, a recording electrode unit arranged on the side of the flexible substrate facing the cerebral cortex, and a piezoelectric transducing unit and a load modulation unit arranged on the back side or lateral area of the flexible substrate. The piezoelectric transducing unit receives extracorporeal ultrasonic waves and converts them into electric energy. The load modulation unit adjusts the port load impedance of the piezoelectric transducing unit in a continuous analog mode according to the cortical electrophysiological signals collected by the recording electrode unit, thereby modulating ultrasonic backscattering echoes. The extracorporeal ultrasonic transceiving unit receives and demodulates the backscattering echoes to reconstruct the cortical electroencephalogram signals. The application can realize wireless acquisition of the cortical electroencephalogram signals without the need of intracorporeal batteries and transcutaneous leads, and improve long-term implant stability in a flexible cortex attachment state.

An intracardiac pulse field ablation (PFA) system comprising a catheter, a constant current AC signal generator, and at least one computing device, wherein the PFA catheter comprises at least a first constant AC current injection electrode, second and third sensing or recording electrodes, and a fourth ablation electrode, the PFA catheter and the electrodes thereof being configured to be operably connected to the constant current AC signal generator, and at least one computing device, the first electrode being a signal injection electrode configured to inject constant current AC signals into or near the patient's cardiac tissue, the second and third electrodes being recording or sensing electrodes configured and located sufficiently close to the first electrode to permit differential sensing and measurement of complex electrical impedance signals, including the phase and amplitude thereof, resulting from injection of the constant current AC signals into the cardiac tissue from the first electrode.

A spinal cord stimulator (SCS) system and method for placing SCS electrodes in a patient for spinal cord stimulation therapy. The SCS system comprises a stimulator and an amplifier unit. The amplifier unit comprises an algorithm module to store and process algorithms for processing data received from recording electrodes placed in a patient's body. The recording electrodes send real-time electromyography (EMG) data related to the patient to the algorithm module. The algorithm module processes the real-time EMG data, including filtering the EMG data to remove artifacts generated by the SCS electrodes. The SCS system compares the filtered EMG data in real-time with the pre-clinical EMG data and displays the comparison data on the display device. The displayed data is used, by the surgeon, for lateralization of the SCS electrode.

A spinal cord stimulator (SCS) system and method for placing SCS electrodes in a patient for spinal cord stimulation therapy. The SCS system includes a stimulator and a base unit. In conjunction with a machine learning (ML) block, the base unit includes an algorithm module to store and process algorithms for processing data received from recording electrodes placed in a patient's body. The recording electrodes send electromyography (EMG) data to the algorithm module. The algorithm module processes and sends the EMG data to a display device. The displayed data is used, by a surgeon, for lateralization of the SCS electrode. The SCS system further includes algorithms to adjust stimulation parameters related to SCS electrodes based upon the surgeon's workflow. Further, the SCS system allows manual modification of stimulation parameters based upon muscle responses and the EMG data from the recording electrodes.

The recording electrode (1) for measuring the electrophysiological signal from biological tissue is particularly suitable for use in magnetic stimulation. This recording electrode is provided with a contact area (2) designed to come into contact with biological tissue by direct contact or through electro-conductive gel to facilitate sensing of the electrophysiological signal from the biological tissue to the contact area (2), where the contact area (2) is electrically connected to the output of the recording electrode (1) for conducting the electrophysiological signal for further processing. The contact area (2) of the recording electrode (1) is divided into at least two separate contact areas (3) electrically separated from each other, each separate contact area (3) being connected to the output of the recording electrode (1) via its own resistor (4), whose electrical resistance is at least 100 Ω, while the resulting resistance of all resistors connecting the individual separate contact areas (3) with the output of the recording electrode (1), as measured between the biological tissue and the output of the recording electrode (1), is at least 50 Ω, which corresponds to at least half the size of the impedance of the biological tissue in magnetic stimulation.

The invention relates to an electromyography evoked potential instrument channel multiplexing control system which comprises a single-chip microcomputer, a DA converter, a multiplexing single-channel stimulation interface and a stimulation electrode connected with the multiplexing single-channel stimulation interface which are electrically connected in sequence to form a single-channel stimulation loop. The single-chip microcomputer, the DA converter, the reusable single-channel stimulation interface, the stimulation channel control module, the branch single-channel stimulation interfaces and the stimulation electrodes connected with the branch single-channel stimulation interfaces are electrically connected in sequence to form a single-channel reuse stimulation loop, and the single-chip microcomputer, the AD converter, the reusable single-channel recording interface and the recording electrodes connected with the reusable single-channel recording interface are electrically connected in sequence to form a single-channel recording loop. The single-chip microcomputer, the AD converter, the reusable single-channel recording interface, the recording channel control module, the plurality of branch single-channel recording interfaces and the recording electrodes connected with the branch single-channel recording interfaces are electrically connected in sequence to form a single-channel multiplexing recording loop, and the single-chip microcomputer is in communication connection with an upper computer. According to the invention, channel selection is realized only by using a very few components, and most components do not work in idle time and after channel selection.

The application discloses a wrist-worn nerve stimulation instrument suitable for left and right hands and a use method thereof, which comprises a fixed host and an electrode slice belt, recesses and adapter interfaces are arranged on the two sides of the bottom of the fixed host, a controller is arranged in the fixed host, the controller comprises a main control MCU, an intelligent identification unit, a storage unit and a stimulation unit, the electrode slice belt comprises a base and an electrode assembly, adapter sockets are arranged on the two sides of the top surface of the base, a storage IC is arranged in the base, the storage IC is provided with an independent identification ID, and the use frequency or use duration of the electrode slice belt can be recorded. The application can monitor the identification ID through the intelligent identification unit, ensure that the electrode slice belt is the original factory adaptation, remind the user to replace in time when the use frequency or use duration of the electrode slice belt is about to expire, lock the fixed host if the electrode slice belt is expired, and guarantee the safety and effectiveness of the use of the user; and through structure improvement, the electrode slice belt can be assembled reversely, and is suitable for the wearing and use of left and right hands.