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114 results about "Stimulus current" patented technology
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Selective nerve fiber stimulation
InactiveUS20060100668A1Modify heart rate variabilityReduce heart rate variabilityElectrotherapyArtificial respirationNerve fiber bundleControl cell
Apparatus is provided for treating a condition of a subject, including an electrode device, adapted to be coupled to an autonomic nerve of the subject, and a control unit. The control unit is adapted to drive the electrode device to apply to the nerve a stimulating current, which is capable of inducing action potentials in a therapeutic direction in a first set and a second set of nerve fibers of the nerve, and to drive the electrode device to apply to the nerve an inhibiting current, which is capable of inhibiting the induced action potentials traveling in the therapeutic direction in the second set of nerve fibers, the nerve fibers in the second set having generally larger diameters than the nerve fibers in the first set. Other embodiments are also described.
Owner:MEDTRONIC INC
Methods, systems, and devices for deep brain stimulation using helical movement of the centroid of stimulation
A method of treating a target region in the brain includes a) contacting tissue to be stimulated with a lead of a stimulation device, the stimulation device comprising a pulse generator coupled to the lead, the lead having a plurality of segmented electrodes disposed at a distal end of the lead, the stimulation device being configured and arranged to stimulate a target region using a positionable centroid of stimulation; b) providing stimulation current to at least one of the segmented electrodes of the lead to generate a centroid of stimulation at a location and stimulate tissue around the location of the centroid of stimulation; c) repositioning the centroid of stimulation to a next location along a helical path by altering the provision of stimulation current to the plurality of electrodes and stimulating tissue around the location of the repositioned centroid of stimulation; and d) repeating c) for each location along the helical path. The method may optionally include collecting data associated with each of the locations of the centroid of stimulation; and displaying at least a portion of the collected data.
Owner:BOSTON SCI NEUROMODULATION CORP
Selective nerve fiber stimulation for treating heart conditions
InactiveUS7778703B2Minimizing adverse side effectRegulate heart rateSpinal electrodesHeart stimulatorsNerve fiber bundleStimulus current
Owner:MEDTRONIC INC
System and method for treating obstructive sleep apnea
There is disclosed a system and method for treating obstructive sleep apnea by terminating an obstructive sleep apnea event before the cessation of breathing occurs. The system comprises one or more microphones capable of detecting breathing sounds within an airway of a person. The microphones generate signals representative of the breathing sounds and send the signals to a controller. The controller uses digital signal processing to identify at least one signal pattern that is associated with a breathing pattern of the person that occurs at the onset of an obstructive sleep apnea event. When the controller detects a signal pattern that indicates the onset of an obstructive apnea event, the controller sends an alarm signal to a stimulus generator. The stimulus generator creates a stimulus (an electric current, a sound, a vibrator, a flashing light, etc.) to cause the sleeping person to move in a manner to terminate the obstructive sleep apnea event before cessation of breathing occurs. The obstructive sleep apnea event is terminated without waking the sleeping person and without causing the sleeping person physiological stress associated with cessation of breathing.
Owner:SLEEP METHODS
Electrical treatment to treat shoulder subluxation
A method for treating shoulder subluxation using an implantable device to stimulate the axillary nerve which in turn activates sensory fibers to relieve shoulder pain and activates deltoid muscle to treat disuse atrophy and possibly augment any weakened voluntary movements. Known stimulation devices are either (1) external requiring surface electrodes or (2) implantable located directly into the deltoid muscle allowing stimulation of the proximate motor-points; each requiring relatively large stimulus currents and neither directly dealing with the pain resulting from the shoulder subluxation. In the present invention, a device is implanted via injection or open surgery proximate to the axillary nerve. Advantageously, the nerve branches into portions that stimulate the deltoid muscle and pass sensory signals. By stimulating the axillary nerve (1) a lower stimulus signal level can be used and (2) pain may be blocked while treating the atrophied deltoid muscle and augmenting weakened voluntary movements.
Owner:ALFRED E MANN FOUND FOR SCI RES
Optimizing the stimulus current in a surface based stimulation device
A method and associated stimulation device for ensuring firing of an action potential in an intended physiological target activated by a stimulus pulse generated by an electrode of a non-invasive surface based stimulation device irrespective of skin-to-electrode impedance by: (i) increasing internal impedance of the stimulation device so as to widen a Chronaxie time period thereby ensuring firing of the action potential of the intended physiological target irrespective of the skin-to-electrode impedance; and / or (ii) generating a stimulation waveform that optimizes a non-zero average current (e.g., non-zero slope of the envelope of the stimulation waveform) during preferably substantially the entire current decay of the stimulus pulse.
Owner:ETHICON INC
Method and System of Bracketing Stimulation Parameters on Clinician Programmers
The present disclosure involves a method of setting stimulation parameters for neurostimulation. A plurality of stimulation parameters available for bracketing is displayed. The stimulation parameters are selected from the group consisting of: stimulation current amplitude, pulse width, frequency, and contact location. Thereafter, in response to an input from a user, at least a subset of the stimulation parameters is selected for bracketing. A respective initial value is then obtained for each of the stimulation parameters in the selected subset. Thereafter, a bracketing process is used to generate a plurality of bracketed values for each of the stimulation parameters in the selected subset. The bracketed values are generated as a function of the initial value. A plurality of stimulation pulses is then delivered to a patient through a neurostimulator that is automatically programmed with a different combination of the bracketed values for the stimulation parameters for each stimulation pulse.
Owner:CIRTEC MEDICAL CORP
System and method for using a multi-contact electrode to stimulate the cochlear nerve or other body tissue
InactiveUS7317944B1Preserving temporalPreserving spatial resolutionHead electrodesDiagnostic recording/measuringFine structurePatient retention
A system and method for preserving temporal and spatial resolution in complex sounds for poor performing patients having high stimulation thresholds is described. The system and method employs two or more adjacent electrode contacts to deliver concurrent stimulation. This concurrent delivery of stimuli creates a high current field intensity that overlaps between individual current fields generated by the two or more adjacent electrodes and which individual fields are summed to create an overlapping field that has a higher current field intensity than a single current emanating from an individual electrode. The use of this method reduces or eliminates the need to increase either the stimulus current amplitude or to increase the pulse width, both of which may cause loss of system resolution, i.e., loss of fine structure information that is used to resolve complex sounds such as music.
Owner:ADVANCED BIONICS AG
Magnetic stimulation having a freely selectable pulse shape
Device and method for generating brief strong current pulses in a coil for generating magnetic field pulses which according to the electromagnetic induction principle induce stimulation currents in the body tissue triggering an action potential of the nerve and / or muscle cells, where the coil is positionable close to the body tissue to be stimulated so that its magnetic field passes through the body tissue, and where the device comprises a power generating unit that can generate a freely selectable temporal course of the current through the coil during the current pulse. A method for determining an optimized temporal course of a brief strong current pulse through the coil, where the temporal course of the current pulse is calculated using a method which numerically simulates the electrical behavior of nerve and / or muscle cells and the coil and optimizes the course of the current pulse regarding at least one parameter, or which by means of stimulating the nerve and / or muscle cells with predetermined current pulses optimizes the temporal course of the current pulse regarding at least one parameter and therefrom determines essential parameters of nerve and / or muscle cells.
Owner:TECH UNIV MUNCHEN
Wearable device and system for a tamper free electric stimulation of a body
ActiveUS20110087300A1Enable detectionFree from harmElectrotherapyElectrocardiographyElectricityPower flow
A wearable device (100) for electric stimulation of a user's body, wherein the wearable device (100) is adapted to fit a portion of the user's body, the wearable device (100) comprising at least one electrode (104a-d) embedded in the wearable device (100) for transferring a stimulating current to the user's body; a connection point (106) being an intermediate connection between the at least one electrode (104a-d) and a control unit (110), the control unit (110) being adapted to generate the stimulating current; and means for detecting if a change in a physical relationship between the connection point (106) and the at least one electrode (104a-d) exceeds a predetermined threshold value, thereby enabling detection of misuse and tampering with the device (100). This ensures no harm is done to the user, for example, by placing the electrodes in such a way that a risk of stimulating the heart exists which may lead to a heart failure. Furthermore, tampering with the device can be detected, thereby enabling an anti-cheat functionality when the device is intended for use in a competitive computer game.
Owner:KONINKLIJKE PHILIPS ELECTRONICS NV
Method for measuring d-q impedance of polyphase power grid components
InactiveUS20090230980A1Improve performanceRobust and resistantResistance/reactance/impedenceAc network circuit arrangementsCharge carrierNyquist plot
A method is provided for measuring D-Q impedance of a component of a polyphase power grid connected to a grid node, and evaluating the margin of stability at a node using Nyquist diagrams generated from the measured D-Q impedance data. A generator, coupled to the polyphase power grid, is controlled to induce suppressed-carrier stimulus current into the grid node. Circuitry measures response signals of suppressed-carrier form existing within a bus voltage at the grid node and a branch current of the component being measured. The method includes measuring complex voltage components of the response signals contained in the bus voltage and complex current components of the response signals contained in the branch current to form simultaneous equations that are resolved to determine the D-Q impedance parameters Zqq, Zqd, Zdq and Zdd of the measured component.
Owner:WILLIAMS MICHAEL LAMAR
Electro-medical system for neuro-muscular paralysis assessment
A computer-implemented method for quantitatively determining a person's neuro-muscular blockade (NMB) level in real-time using at least one sensor attached to the person is provided. The method includes receiving a first input signal from the sensor, wherein the first input signal includes a measurement of a first muscular response, the first muscular response resulting from a baseline stimulus current delivered to the person before administration of NMB agents to the person, and establishing a baseline chronaxie based on the first input signal. The method also includes delivering one or more stimulus currents to the person after the administration of NMB agents to the person, receiving a second input signal from the sensor, wherein the second input signal includes a measurement of one or more muscular responses resulting from the one or more stimulus currents, and determining the person's NMB level based on the second input signal.
Owner:ONDINE TECH
Rotor thermal model for use in motor protection
ActiveUS7161778B2Emergency protective arrangements for automatic disconnectionEmergency protective arrangements responsive to undesired changesElectric machineInduction motor
The protective relay for an induction motor includes a first program function which establishes a first thermal threshold value for a start condition of the motor, using a start condition thermal model. The thermal condition of the motor is determined by measuring the motor's thermal response to stimulus. A comparator compares the start condition thermal representation with the first thermal threshold value and monitors whether the first thermal threshold value is exceeded by the start condition thermal representation. A second thermal threshold value is established for a run condition of the motor, including a selected time constant which results in the time-current curves of the start and run conditions being substantially continuous. A representation of the thermal condition of the motor is then developed in response to stimulus current. A comparator then compares the run condition thermal representation with the second thermal threshold value.
Owner:SCHWEITZER ENGINEERING LABORATORIES
Uterine electrical stimulation system and method
Systems and methods for applying stimulating current to a patient for treating insufficient uterine contractions are provided. The system includes stimulation electrodes of a balloon electrode array device, a ring electrode array device, an electrode probe device, or a mesh electrode array device. Some aspects of the invention also provide a connector and cable device for coupling the stimulation electrodes to electronics for generating and providing the stimulating current to the stimulation electrodes.
Owner:DIGNITY HEALTH
Automatic current balancing with lock control for a clinician programmer
Owner:CIRTEC MEDICAL CORP
Systems and methods for electronic weaponry that detects properties of a unit for deployment
Owner:AXON ENTERPRISE INC
Electrical treatment to treat shoulder subluxation
InactiveUS20050245989A1Relief the painTreated conditionElectrotherapyArtificial respirationShoulder subluxationShoulder region pain
A method for treating shoulder subluxation using an implantable device to stimulate the axillary nerve which in turn activates sensory fibers to relieve shoulder pain and activates deltoid muscle to treat disuse atrophy and possibly augment any weakened voluntary movements. Known stimulation devices are either (1) external requiring surface electrodes or (2) implantable located directly into the deltoid muscle allowing stimulation of the proximate motor-points; each requiring relatively large stimulus currents and neither directly dealing with the pain resulting from the shoulder subluxation. In the present invention, a device is implanted via injection or open surgery proximate to the axillary nerve. Advantageously, the nerve branches into portions that stimulate the deltoid muscle and pass sensory signals. By stimulating the axillary nerve (1) a lower stimulus signal level can be used and (2) pain may be blocked while treating the atrophied deltoid muscle and augmenting weakened voluntary movements.
Owner:ALFRED E MANN FOUND FOR SCI RES
Desensitizing device
ActiveUS20150032195A1Improve staminaUndesirable side-effectPenis support devicesNon-surgical orthopedic devicesElectrical stimulationsMale Genitals
The desensitizing device contains an electrical stimulation member optionally configured on a support member. The electrical stimulation member contains a control circuit, at least two electrodes, and an electricity supply element. The electricity supply element provides electricity to the control circuit, and the control circuit generates a stimulating current to the electrodes. By configuring a male genital with the support member so that the electrodes are in contact with the penis skin, the stimulating current produced by the control circuit is conducted to the electrodes and provides a low-strength subcutaneous nerve stimulation through the penis skin. The subcutaneous nerve is as such temporarily numbed and desensitized.
Owner:GIMER MEDICAL CO LTD
Multi-channel thermal stimulus current measuring device used for dielectric substances
ActiveCN103412178AGuaranteed shielding effectGuaranteed measurement accuracyCurrent/voltage measurementTest efficiencyPower flow
The invention relates to a multi-channel thermal stimulus current measuring device used for dielectric substances, and belongs to the technical field of insulation material performance testing. The multi-channel thermal stimulus current measuring device comprises a vacuum thermal insulation barrel and a measuring cavity body, wherein the measuring cavity body is placed in the vacuum thermal insulation barrel, and liquid nitrogen is filled between the measuring cavity body and the vacuum cavity body. A top cover is arranged on the measuring cavity body; a supporting column, a vacuumizing valve and a vacuum plug are arranged on the top cover; a cable guide core is arranged in the supporting column; a fixed column in the measuring cavity body is fixed to the top cover; an upper partition plate, a lower partition plate, an upper fixed plate and a lower fixed plate are fixed relative to the fixed column; a conductive column is fixed relative to the upper partition plate and the lower partition plate, and is communicated with the cable guide core; a round conducting plate is fixed to the upper fixed plate, and is communicated with the conductive column; after being installed axially, an upper electrode supporting column, an upper electrode, a lower electrode and a lower electrode supporting column are fixed between the upper fixed plate and the lower fixed plate. The multi-channel thermal stimulus current measuring device used for the dielectric substances greatly shortens measuring time required by the same sample number, the average liquid nitrogen consumption of samples is greatly reduced, testing efficiency is obviously improved and measuring cost is obviously reduced.
Owner:TSINGHUA UNIV +1
In situ membrane monitoring
InactiveUS20100308842A1Precise cuttingVibration measurement in solidsMembranesElectricityStimulus current
Owner:INPHAZE AUSTRALIA PTY LTD
Current sensing multiple output current stimulators
Owner:ALFRED E MANN FOUND FOR SCI RES
Solid-liquid universal type thermal stimulus current measuring device
ActiveCN105806892ASolve a lot of volatileResolve disturbanceMaterial analysis by electric/magnetic meansMaterial thermal analysisElectricityNitrogen
Owner:TSINGHUA UNIV +3
Animal and plant cell electric stimulator with randomized spatial distribution of electrodes for both current injection and for electric field shaping
An electric stimulator for heart, brain, organs and general cells with a random shape and position of electrodes which enhances its performance for breaking the symmetry. Two types of electrodes are introduced: type-1, or active electrodes are similar to prior art, while type-2, or passive electrodes have not been used in this context. Passive electrodes are electrically insulated, being unable to inject current in the surrounding medium, but they are capable of shaping the electric field, which has consequence on the path of the stimulating currents injected by type-1 electrodes.
Owner:LEE CHONG IL +1
Systems and methods for electronic weaponry that detects properties of a unit for deployment
An electronic weapon, when combined with a unit for deployment, causes skeletal muscle contractions in a human or animal target. According to the present invention, a launch controller for an electronic weapon includes a detector, a stimulus signal generator, and a switch. When the switch is conducting, it completes a circuit in combination with a unit for deployment. The circuit, when completed, operates a propellant of the unit for deployment to deploy at least two electrodes of the unit for deployment to enable the stimulus signal generator to deliver through the target a stimulus current to incapacitate the target by causing contractions of the skeletal muscles of the target. The detector is coupled to the switch and detects whether the switch is conducting prior to combining the unit for deployment and the electronic weapon.
Owner:AXON ENTERPRISE INC
Intelligent electrical stimulation circuit device
InactiveCN102940933AIn line with the concept of active rehabilitation treatmentDiagnostic recording/measuringSensorsMicrocontrollerHuman body
The invention discloses an intelligent electrical stimulation circuit device. A myoelectric and a signal processor synchronously collect and process real-time myoelectric signals of human bodies, signals are output to a microcontroller through a band-pass filter, the microcontroller outputs frequency-modulated signals to control the connection and the disconnection of a main switch and outputs amplitude-modulated signals which are transmitted to a comparison amplifier through the main switch, the comparison amplifier compares amplitude-modulated signals and signals of a feedback circuit, amplified output signals are used for controlling the connection and the disconnection of an auxiliary switch, part of signals passing through the auxiliary switch enters the feedback circuit and then are input to the comparison amplifier, and part of signals input to the comparison amplifier are used for controlling the intensity of stimulating current produced by a stimulating current generator. By the aid of the intelligent electrical stimulation circuit device, myoelectric signals of human bodies are collected in real time, the stimulating current which changes with the amplitude of myoelectric signals is output in real time, and the frequency of the stimulating current can be adjusted in real time according to demands of treatment, and the intensity and the frequency of the stimulating current can be changed in an adaptive mode according to changes of patient wishes, so that patients can finish actions that patients want to finish, and the device conforms to the modern active rehabilitation concept.
Owner:NANJING VISHEE MEDICAL TECH
Systems and methods for indicating properties of a unit for deployment for electronic weaponry
An electronic weapon may be used with a unit for deployment to cause skeletal muscle contractions in a human or animal target. The unit for deployment when electrically coupled to the electronic weapon, may include at least two electrodes, an indicator, and a propellant for deploying the electrodes to enable delivery, through the target, of a stimulus current to incapacitate the target by causing contractions of the skeletal muscles of the target. The indicator indicates, to the electronic weapon, indicia of a first property of the unit for deployment prior to operating the propellant, and indicia of a second property of the unit for deployment after operating the propellant. Another unit for deployment includes at least two electrodes, an indicator, and a stimulus signal generator, coupled to the electrodes to enable delivery, through the target, of a stimulus current to incapacitate the target by causing contractions of the skeletal muscles of the target. The indicator indicates, to the electronic weapon, indicia of a first property of the unit for deployment prior to operating the stimulus signal generator, and indicia of a second property of the unit for deployment after operating the stimulus signal generator.
Owner:AXON ENTERPRISE INC
Method for measuring D-Q impedance of polyphase power grid components
InactiveUS8044672B2Improve performanceRobust and resistantResistance/reactance/impedenceAc network circuit arrangementsCharge carrierNyquist plot
A method is provided for measuring D-Q impedance of a component of a polyphase power grid connected to a grid node, and evaluating the margin of stability at a node using Nyquist diagrams generated from the measured D-Q impedance data. A generator, coupled to the polyphase power grid, is controlled to induce suppressed-carrier stimulus current into the grid node. Circuitry measures response signals of suppressed-carrier form existing within a bus voltage at the grid node and a branch current of the component being measured. The method includes measuring complex voltage components of the response signals contained in the bus voltage and complex current components of the response signals contained in the branch current to form simultaneous equations that are resolved to determine the D-Q impedance parameters Zqq, Zqd, Zdq and Zdd of the measured component.
Owner:WILLIAMS MICHAEL LAMAR
Electrode System for Transcutaneous Nerve and/or Muscle Stimulation
ActiveUS20090118789A1Easy to useImprove comfortHeart defibrillatorsArtificial respirationPower flowMedicine
An electrode system for transcutaneous nerve and / or muscle stimulation that includes a pair of stimulating electrodes and a stimulation current generator for generating a nerve and / or muscle stimulation current between the stimulating electrodes. The system also includes a current-injecting electrode arranged in proximity to one of the stimulating electrodes, and an injection-current generator located in the area of the current-injecting electrode. The current-injecting electrode and the corresponding injection-current generator reduce, or even eliminate, undesirable sensations resulting from an excitation of subcutaneous receptors by the stimulation current.
Owner:DJO GLOBAL SWITZERLAND SARL
Systems and methods for indicating properties of a unit for deployment for electronic weaponry
An electronic weapon may be used with a unit for deployment to cause skeletal muscle contractions in a human or animal target. The unit for deployment when electrically coupled to the electronic weapon, may include at least two electrodes, an indicator, and a propellant for deploying the electrodes to enable delivery, through the target, of a stimulus current to incapacitate the target by causing contractions of the skeletal muscles of the target. The indicator indicates, to the electronic weapon, indicia of a first property of the unit for deployment prior to operating the propellant, and indicia of a second property of the unit for deployment after operating the propellant. Another unit for deployment includes at least two electrodes, an indicator, and a stimulus signal generator, coupled to the electrodes to enable delivery, through the target, of a stimulus current to incapacitate the target by causing contractions of the skeletal muscles of the target. The indicator indicates, to the electronic weapon, indicia of a first property of the unit for deployment prior to operating the stimulus signal generator, and indicia of a second property of the unit for deployment after operating the stimulus signal generator.
Owner:AXON ENTERPRISE INC
Electromyogram evoked potential instrument
PendingCN107233094AHigh temperature toleranceImprove securityDiagnostic signal processingSensorsEngineeringFault rate
The invention aims at disclosing an electromyogram evoked potential instrument, which comprises a main controller, a signal processor and an auxiliary controller, wherein the main controller is used for performing various kinds of signal stimulus on the human body; the signal processor is used for collecting, amplifying and filtering on the human body signals; the main controller and the auxiliary controller are connected and perform data interaction; the signal processor is connected with the main controller; the main controller is also connected with a stimulus device and an isolation power supply; the stimulus device is used for regulating the stimulus current intensity, sound intensity and flash intensity through phase change of two groups of pulse signals and supplying the electricity for equipment; and the auxiliary controller is connected with an operator convenient for operating the equipment. Compared with the prior art, the electromyogram evoked potential instrument has the advantages that the electromyogram and the evoked potential are integrated; the industrial integration professional design is used; the dropping-resistant vibration-resistant and temperature-difference-tolerance degrees are high; the anti-electromagnetic interference capability is high; the fault rate is low; the stability is high; the safety is high; the service life is long; and the goal of the invention is achieved.
Owner:SHANGHAI HAISHEN MEDICAL ELECTRONICS INSTR
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