摘要:
Methods using multiple timing channels for electrode adjustment during set up of an implanted stimulator device are disclosed. In one embodiment, at least two conditions of electrodes (i.e., electrode combinations, pulse widths, pulse frequencies, pulse amplitudes) can be “simultaneously” tested by providing each condition in its own timing channel. In a preferred embodiment, the pulses in each of the timing channels are interleaved and non-overlapping to preserve the ability of the patient to assess the therapeutic feel of both and to allow some time between pulses for recovery. As well as allowing two sets of electrode conditions to be gauged at the same time, the technique allows the electrode to be manipulated during set up with ease and with a reduced possibility of providing the patient with erroneous results. For example, the two conditions in the two timing channels can comprise initial and target final conditions, and transitioning between from one to the other during device set up is facilitated as compared to the prior art because concerns with electrodes having inconsistent properties in both conditions are alleviated.
摘要:
Methods of using unidirectionally propagating action potentials (UPAPs) for vagus nerve stimulation and for certain disorders are provided. Stimulators capable of creating such UPAPs include, but are not limited to, miniature implantable stimulators (i.e., microstimulators), possibly with programmably configurable electrodes.
摘要:
A neurostimulation paddle lead, method of neurostimulation, and neurostimulation system are provided. The neurostimulation paddle lead carries a plurality of electrodes comprising at least four columns of electrodes having a spacing between two inner electrode columns less than a spacing between the inner electrode columns and adjacent outer electrode columns. The inner electrode columns may also be longitudinally offset from the outer electrode columns. The methods and neurostimulation systems steer current between the electrodes to modify a medial-lateral electrical field created adjacent spinal cord tissue.
摘要:
A method, computer medium, and system for programming a controller is provided. The controller controls electrical stimulation energy output to electrodes, and stores a set of programmed stimulation parameters associated with the electrodes. The programmed stimulation parameter set is compared with sets of reference stimulation parameters, each of the reference sets of stimulation parameters being associated with the electrodes. If an identical match is determined between the programmed stimulation parameter set and any one of the reference stimulation parameter sets exists based on the comparison, the identically matched stimulation parameter set is selected as an initial stimulation parameter set. If an identical match does not exist, a best between the programmed stimulation parameter set and the reference stimulation parameter sets is determined and selected as the initial stimulation parameter set. The controller is then programmed with a new set of programmable stimulation parameters based on the initial stimulation parameter set.
摘要:
Methods of using unidirectionally propagating action potentials (UPAPs) for vagus nerve stimulation and for certain disorders are provided. Stimulators capable of creating such UPAPs include, but are not limited to, miniature implantable stimulators (i.e., microstimulators), possibly with programmably configurable electrodes.
摘要:
Methods of stimulating a vagus nerve include providing at least one implantable stimulator with at least two electrodes, configuring the electrodes to apply stimulation that unidirectionally propagates action potentials along a vagus nerve, and applying the stimulation to the vagus nerve to effectively select afferent fibers, thereby treating at least one of epilepsy and depression while limiting side effects of bidirectional stimulation. At least one of the electrodes comprises a leadsless electrode.
摘要:
An implantable cardiac stimulation device, such as a pacemaker or Implantable Cardioverter Defibrillator, is configured to automatically monitor the effects of antiarrhythmic drugs on cardiac electrical signals within a patient to verify the efficacy of the drugs taken. In one example, an analysis of patient cardiac electrical signals is performed by comparing the cardiac electrical signals with values representative of the effects of different classes of antiarrhythmic drugs. If the implantable device determines that the prescribed antiarrhythmic drugs have not been effective, a warning signal is generated. The warning signal is conveyed directly to the patient via a bedside monitor and to the patient's physician via remote connection to an external programmer device so that both are notified of the drug efficacy problems. Additionally, the implantable device may be configured to automatically adjust pacing and defibrillation control parameters in an attempt to compensate for any lack of efficacy in the drugs. For example, the aggressiveness of overdrive pacing may be increased. Alternatively, a drug pump is controlled to adjust the dosage of antiarrhythmic drugs if an initial dosage is found to be ineffective.
摘要:
A method of selecting of subset of electrodes in a stimulator device implanted in a patient for further clinical evaluation is disclosed. In one embodiment, the method comprises measuring at least first and second measurement for each of the plurality of electrodes that are indicative of the ability of the electrode if activated to provide useful therapy to the patient in which the stimulator device is implanted, such as electrode impedance, field potential, and nerve response. The measurements can be objective such as those measurements just mentioned, or can comprise subjective measurements which are quantified in response to qualitative feedback from the patient. A weight is then determined for each of the measurements, which may be a predetermined weight or determined on the basis of the variance of the measurement between the electrodes. The weight is then applied to each electrode measurement, which measurement may be normalized, and the weighted measurements for each electrode are preferably summed to arrive at a value which itself is indicative of a particular electrode's ability to provide useful therapy to the patient. These values can then be used to determine a subset of the electrodes useful for further clinical evaluation in the patient, which improved the accuracy and speeding determining appropriate patient therapy.
摘要:
A system and corresponding method are provided to reliably detect capture during multi-chamber stimulation, and to further monitor the progression of congestive heart failure. The system provides a method by which intracardiac electrogram (IEGM) characteristics representing single-chamber capture and bi-ventricular capture are stored in memory and displayed. The annotation of the displayed waveforms is such that events associated with loss of capture, single-chamber capture, and bi-ventricular capture are clearly marked for ready interpretation by the physician. In a first situation, a stimulation pulse is followed by a time delay window and a subsequent depolarization complex that represents intrinsic responses of the chambers that have not been captured. In a second situation, a stimulation pulse is followed almost immediately by an evoked response that represents capture of one chamber, and a subsequent depolarization complex that represents an intrinsic response of one chamber that has not been captured. In a third situation, a stimulation pulse is almost immediately followed by an evoked response that represents simultaneous capture of two chambers.