215 results about "Recording electrode" patented technology

MRI compatible localization and/or guidance systems for facilitating placement of an interventional therapy and/or device in vivo include: (a) a mount adapted for fixation to a patient; (b) a targeting cannula with a lumen configured to attach to the mount so as to be able to controllably translate in at least three dimensions; and (c) an elongate probe configured to snugly slidably advance and retract in the targeting cannula lumen, the elongate probe comprising at least one of a stimulation or recording electrode. In operation, the targeting cannula can be aligned with a first trajectory and positionally adjusted to provide a desired internal access path to a target location with a corresponding trajectory for the elongate probe. Automated systems for determining an MR scan plane associated with a trajectory and for determining mount adjustments are also described.

An embodiment of the invention provides a neural probe (100) containing a plurality of nanoscale recording electrodes. The recording electrodes have a width of 1 micron or less and a distance between adjacent recording electrodes is 10 microns or less. Another embodiment of the invention provides a neural probe comprising a plurality of microfabricated recording electrodes located on a polymer base material, such as a flexible polymer cantilever.

A device for brain stimulation includes a lead having a longitudinal surface; at least one stimulation electrode disposed along the longitudinal surface of the lead; at least one recording electrode, separate from the at least one stimulation electrode, disposed on the lead; and an implantable pulse generator coupled to the at least one stimulation electrode. In some instances, the implantable pulse generator can be implanted into a burr hole in the skull made for insertion of the lead into the brain.

The present invention provides an electrode array device for simultaneously detecting electrical potentials at five or more locations on the anterior surface of an eye. The device comprises a dielectric lens substrate having a concave inner surface conforming to the anterior surface of the eye, and at least five recording electrodes positioned in relation to the inner surface of the lens substrate so as to make electrical connection with the anterior surface of the eye when the lens substrate is placed on the anterior surface of eye. Each recording electrode is in electrically conductive communication with a corresponding conductive contact, there being one conductive contact for each recording electrode. Each conductive contact is adapted for operable connection to signal processor, and each conductive contact is electrically insulated from the anterior surface of the eye. A computational method for analyzing electrophysiological potentials recorded at five or more locations on the anterior surface of the eye, which reflect the spatial distribution of activity of the retina, is also provided.

This invention is intended to provide an EKG recording electrode device which can be easily and quickly fitted to a patient without giving uncomfortable bodily sensations to the patient even if it is difficult to change the position of the patient, making it possible to properly take an electrocardiogram. An EKG recording electrode device comprises an electrode holder made of a sheet material having flexibility and a size suited for placing on an upper front part of a human body, and a plurality of electrodes attached to the electrode holder, each electrode including a contact portion having a curved surface on the side which comes into contact with a human skin.

Catheters and methods for obtaining monophasic action potential (“MAP”) electrograms include a flexible catheter body defining a longitudinal axis, and a distal assembly affixed to the catheter body distal end defining a distal tip. The distal assembly has at least three MAP recording electrodes, and at least one reference electrode for determining reference potential. The recording electrodes are each positioned a radial distance from the longitudinal axis in at least three different radial directions, defining a recording geometry substantially having radial symmetry. The reference electrode is a longitudinal distance from the recording geometry. Optional features include a steerable catheter shaft, one or more radio-frequency ablation electrodes, and a dedicated pacing electrode. Different possible embodiments include a dome housing having the recording electrodes in a fixed spatial arrangement, and a distal loop assembly having an array of electrodes on at least three flexible loop elements.

The invention provides a wearable brain function regulation and control system comprising a multichannel EEG record electrode, a DC electrical stimulation electrode, a data acquisition and control module, a wireless communication module, a head wearable supporting device, a cloud platform database and a mobile terminal. The multichannel EEG record electrode acquires potential change signals from the scalp. The DC electrical stimulation electrode stimulates the scalp. The data acquisition and control module is connected with the multichannel EEG record electrode and the DC electrical stimulation electrode and generates user physiological state data according to the potential change signals and outputs the user physiological state data to the cloud platform database through the wireless communication module. A simulation instruction transmitted by the mobile terminal is received through the wireless communication module, and stimulation current is outputted to the DC electrical stimulation electrode according to the stimulation instruction. The cloud platform database stores the potential change signals and the user physiological state data. The mobile terminal analyzes, stores and displays the user physiological state data and outputs the stimulation instruction. The regulation and control system is convenient to carry and can perform accurate regulation and control on the active state of the brain.

Devices and methods for performing extracellular recording of cells, such as excitable cells, cardiomyocytes, and cardiomyocyte precursor cells is provided. An exemplary device includes a nonconductive substrate forming or provided as a base of one or more wells; a recording electrode positioned on the substrate within the well, wherein the recording electrode is accessible to cells when a cell sample is added to the device; and a reference electrode positioned within the well in a cell-free zone, the cell-free zone characterized as free from contact with cells when the cell sample is added to the device, thereby preventing contact between cells and the reference electrode.

The present invention is directed to a physiological recording device, or other types of sensors to detect a biopotential, and more particularly, a physiological recording electrode that can be used without skin preparation or the use of electrolytic gels. The invention is further directed to the configurations of structures on the physiological recording electrode's lower surface. The structures having a length, width, and height, which are capable, at least in part, of transmitting an electric potential from the skin which can be measured. The structures may or may not limit the depth of application, and/or anchor the electrode or other device during normal application, and/or allow for uniform application of the electrode or other device over unprepared skin.

A system and apparatus for enabling independent, highly reliable and accurate self-application of an anti-tremor means by a disabled patient, without requirement for application fixtures, wherein anti-tremor means comprises a single unit, self adhesive stimulation and recording electrode with an integrated supply of energy and a control unit, further comprising an alignment, and application means for applying said anti-tremor means configured to enable independently self application by a severely handicapped patient, wherein system and method for tremor reduction is by means of closed-loop functional electrical stimulation, including a sensor for sensing muscle movements, and Functional Electrical Stimulation (FES) apparatus for providing FES to a muscle, the FES apparatus being in communication with the sensor via a band pass filter for filtering around a tremor frequency to ignore slow movements and high frequency noise.

Provided herein are a method and system are provided for the localization of clinically relevant electrophysiological signals necessary for the proper placement of the electrodes for nervous system stimulation. The system provides electrical and mechanical means to stimulate or excite neural structures in order to elicit specific neural responses. The method can include mechanical vibratory stimulation, cutaneous electrical stimulation, electrical stimulation of the peripheral nerves, or photic stimulation, and recording of local field potentials and extracting evoked potentials in response to stimulation. The method also includes extracting components of the evoked potentials that relate the signal in the evoked potentials to specific anatomical structures and localization of the source of the evoked potentials recorded so as to identify the location of the source relative to the recording electrode with high resolution by sampling the evoked potentials with a relative large (macro) electrode that is moved in small incremental steps.

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 invention provides a photoelectric integrated stretchable flexible neural electrode and a preparation method. The flexible neural electrode comprises a first elastic substrate, a photostimulationelectrode, a second elastic substrate and a recording electrode, and the photostimulation electrode and the recording electrode are both in snakelike curved wire arrangement structures. The lower surface of the photostimulation electrode is provided with a first silicon dioxide layer, and the photostimulation electrode is bonded to the surface of the first elastic substrate by strong chemical bonds generated in condensation reaction of the first silicon dioxide layer and the first elastic substrate. The upper surface of the photostimulation electrode is provided with the second elastic substrate, the lower surface of the recording electrode is provided with a second silicon dioxide layer, and the recording electrode is bonded to the surface of the second elastic substrate through strong chemical bonds generated in condensation reaction of the second silicon dioxide layer and the second elastic substrate, so that the recording electrode and the photostimulation electrode are integratedstructurally. The flexible neutral electrode is available for long-term implantation, high in flexibility and capable of bearing deformation influences of brain tissue expansion and shrinkage and thelike.

An electric diagnostic tape measure used to measure the electrical conduction of a peripheral nerve using a standard electrical nerve stimulator. The tape measure includes a flexible, elongated body with an active recording electrode mounted or attached to its distal end. Formed on the lower surface of the active recording electrode is a conductive, adhesive layer that temporarily holds the electrode on the patient's skin during a test. Located on the top surface of the elongated body is a distance-measuring index. During a test, the elongated body is aligned so that the end of the distance-measuring index is aligned and registered with the active recording electrode. By moving the nerve stimulator to different locations adjacent to the skin adjacent to the elongated body, the distance of the nerve being tested may be measured. In one embodiment, a wire extends through the elongated body.

An automated system, method, apparatus, device and/or computer program product for detecting positioning effect is set forth, the apparatus according to an exemplary embodiment may include an output operable to couple to one or more stimulating electrodes to stimulate one or more peripheral nerves of the patient, an input operable to couple to one or more recording electrodes to record resultant electrical waveforms generated by a nervous system of a patient in response to the stimulating module, and one or more processors operable to identify the positioning effect based on the resultant electrical waveforms.

Method and apparatus for guiding ablative therapy of abnormal biological electrical excitation. The excitation from the previous excitatory wave is significant at the beginning of the next excitation. In particular, it is designed for treatment of fast cardiac arrhythmias. Electrical signals are acquired from recording electrodes, and an inverse dipole method is used to identify the site of origin of an arrhythmia. The location of the tip of an ablation catheter is similarly localized from signals acquired from the recording electrodes while electrical pacing energy is delivered to the tip of the catheter close to or in contact with the cardiac tissue. The catheter tip is then guided to the site of origin of the arrhythmia, and ablative radio frequency energy is delivered to its tip to ablate the site.