31 results about "High frequency stimulation" patented technology

A method for the treatment of a patient for the purpose of lowering blood pressure and/or treating cardiac arrhythmias, particularly atrial fibrillation includes the insertion of an ablation catheter into the lumen of a renal artery. The ablation catheter is equipped with an electrode that can stimulate the wall tissue in the renal artery to help identify the location of a renal nerve. High-frequency stimulation of the renal nerve causes a decrease in the blood pressure of the patient thereby indicating that a renal nerve is nearby. The ablation catheter is used to ablate the renal nerve using radiofrequency, ultrasound, microwave energy or cryogenic cooling. An irrigated ablation catheter may be used to decrease damage to cells in the wall of the lumen of the renal artery other than the renal nerve, such as the endothelial cells.

The present invention describes methods and devices using low frequency electrical stimulation or neural high frequency stimulation to modulate lower esophageal sphincter (LES) pressure. The electrical stimulation may be delivered to the LES via one or more electrodes that is placed in contact with the LES tissue. The methods and devices are useful to treat a number of conditions or disease conditions, including for example, gastroesophageal reflux disease (GERD).

IMDs and methods are provided for electroporation treatment of subcutaneous tumors. In some embodiments, IMDs of the present invention may store and introduce chemotherapy drugs into the body prior to electroporation therapy. High frequency stimulation of tissue in or around the tumor may also be provided to increase tissue temperature prior to electroporation therapy. Still further, delivery of the electroporation therapy may be synchronized with cardiac qRs complex to avoid impeding normal cardiac rhythm. Algorithms to suspend therapy in the event of edema may also be incorporated.

The invention discloses a Hilbert-Huang Transform (HHT)-based high-frequency combined coding steady state visual evoked potential brain-computer interface method, which comprises the following steps of: connecting hardware, expressing different targets by using nn stimulation sequences formed by time sequence permutation and combination through n high-frequency stimulation frequencies, coding the stimulation sequences to form a code base, then executing electroencephalogram data characteristics by adopting a Hilbert-Huang Transform (HHT)-based variable frequency electroencephalogram signal characteristic extraction method, acquiring a Hilbert time-frequency graph of the electroencephalogram data, and comparing the extracted electroencephalogram data characteristics with the code base by using a local frequency spectrum extreme value target identification method to realize quantified target identification accuracy. The method has the advantages of simple operation, little electrode number, more target number, reduction of testee fatigue, and reduction of probability of inducing testee epilepsy.

An exemplary system includes a processing facility and a control facility. The processing facility is configured to 1) divide an audio signal presented to a cochlear implant patient into a plurality of analysis channels each containing a frequency domain signal, and 2) maintain data representative of a crossover frequency. The control facility is configured to 1) direct a cochlear implant to apply electrical stimulation representative of each frequency domain signal included in a plurality of low frequency analysis channels located below the crossover frequency in accordance with a low frequency stimulation strategy that includes a degree of focusing, and 2) direct the cochlear implant to apply electrical stimulation representative of each frequency domain signal included in a plurality of high frequency analysis channels located above the crossover frequency in accordance with a high frequency stimulation strategy that includes a lesser degree of focusing than the low frequency stimulation strategy.

Systems and methods for treating a patient having symptoms of restless legs syndrome (RLS) or Periodic Limb Movement Disorder (PLMD) using high-frequency stimulation by applying a high-frequency pulsed electrostimulation therapy signal to a peroneal nerve or a branch thereof, where the therapy signal is above a motor threshold of a muscle innervated by the peroneal nerve or branch thereof. Surface EMG (sEMG) response to neurostimulation can be used to evaluate patient responsivity to neurostimulation, or to evaluate neurostimulation efficacy, such as to compare various neurostimulation parameter settings and to select between such settings to meet or balance between one or more goals. The sEMG response can be obtained with the muscle at rest, or during muscle activation.

The invention provides a multi-site closed-loop stimulation feedback system and a multi-site closed-loop stimulation feedback method for gait disorder of Parkinson's disease. The system comprises a signal acquisition module used for acquiring electroencephalogram physiological signals of primary motor cortex and subthalamic nucleus and generating PAC signals; the signal processing module is used for generating a gait disorder probability curve based on waveform indexes of the PAC signal and the electroencephalogram physiological signal, and judging whether a probability value in the gait disorder probability curve in a certain time period exceeds a PAC threshold value or not; the stimulation control module is used for generating a control command for outputting high-frequency stimulation or low-frequency stimulation and controlling the signal acquisition module to continuously acquire stimulated electroencephalogram physiological signals at the primary motor cortex for feedback; the stimulation generation module is used for emitting a high-frequency or low-frequency stimulation signal to an electrode arranged at the subthalamic nucleus based on the control command; wherein the signal processing module and the stimulation control module adjust parameters of high-frequency stimulation or low-frequency stimulation according to the stimulated electroencephalogram physiological signals.

In accordance with the present invention, various embodiments of neurostimulators and stimulation systems are disclosed that provide different shapes and patterns of stimulus pulses and trains of pulses with fixed and no fixed frequencies. The neurostimulator can be configured to provide high frequency stimulation and also be implantable in the head or neck regions in order to stimulate nerves and nerve ganglions in the head and neck regions and also stimulate the brain.

The invention relates to the field of medical treatment, in particular to an electric acupoint massage recovery and electric stimulation pertinence medical treatment device. A preposition board comprises a stimulation and electric shock frequency head, wherein the stimulation and electric shock frequency head comprises a vertical cavity; a front section of the cavity comprises a metal end part; and an electric stimulation connecting line extends from the metal end part and is connected with an external power supply. The device integrates vibration, electrotherapy of a controllable area, acupoint electrotherapy and visual stimulation creatively, can achieve acupoint massage and selective acupoint electrotherapy in the traditional Chinese medicine, can bring high-frequency stimulation to local nerves, does not influence nerves in other areas, is suitable for people at various age groups and with various heights and body types, achieve the effects via a structure, further achieves the electrotherapy and magnetotherapy creatively by virtue of acupoints and meridians at the same time, and achieves a good treatment effect and arouses self subjective initiatives of patients to the fullest extent by combining the stimulation of the meridians and the micro electric stimulation of the nerves.

Systems and methods for treating a patient having symptoms of restless legs syndrome (RLS) or Periodic Limb Movement Disorder (PLMD) using high-frequency stimulation by applying a high-frequency pulsed electrostimulation therapy signal to a peroneal nerve or a branch thereof, where the therapy signal is above a motor threshold of a muscle innervated by the peroneal nerve or branch thereof. Surface EMG (sEMG) response to neurostimulation can be used to evaluate patient responsivity to neurostimulation, or to evaluate neurostimulation efficacy, such as to compare various neurostimulation parameter settings and to select between such settings to meet or balance between one or more goals. The sEMG response can be obtained with the muscle at rest, or during muscle activation.

Systems and methods for treating a patient having symptoms of restless legs syndrome (RLS) or Periodic Limb Movement Disorder (PLMD) using high-frequency stimulation by applying a high-frequency pulsed electrostimulation therapy signal to a femoral nerve or a branch thereof. An electrostimulation device can include or use clonus detection circuitry can be used such as to monitor for a presence of clonic activity during treatment. Feedback from the clonus detection circuitry can be used to select or modify a therapy parameter of the electrostimulation device such as to help mitigate clonic muscle activity during therapy.

The invention discloses an adjusting method of stimulation frequency of a sacral nerve stimulator. The adjusting method comprises steps of setting two groups of stimulation electrodes; setting a stimulation change period, which is a fixed value; sending low frequency pulses to one group of the stimulation electrodes, and sending high frequency pulses to another group of the stimulation electrodes until the stimulation change period is reached; and in the next stimulation change period, exchanging stimulation frequency signals of the two groups of stimulation electrodes. According to the invention, by combining low frequency and high frequency, and electrical nerve stimulation, a bladder is controlled to contract and be fully discharged, and imbalanced contraction of the urethral sphincter is avoided; parts of frequency amplitude values in low frequency are changed, so fatigue to stimulation of nerves and muscles is avoided; only two stimulation points are set and high frequency stimulation and low frequency stimulation are alternatively performed at the two stimulation points, so a problem of the requirement of multiple stimulation points is avoided and difficulty level of an operation is reduced.