摘要:
This disclosure describes techniques for a method of charging a battery. In an example, the method includes charging the battery during a first charging session until a first charging termination parameter value is reached. The method also includes determining, for a second charging session, a second charging termination parameter value based on a duration of the first charging session, wherein the second charging termination parameter value is different than the first charging termination parameter value. The method also includes charging the battery during the second charging session until the second charging termination parameter value is reached.
摘要:
A therapy system for managing a psychiatric disorder of the patient may be controlled based on a patient mood state. Therapy may be delivered to a patient according to a therapy program, and a physiological parameter of the patient may be monitored during or after therapy delivery. The patient mood state may be determined based on the monitored physiological parameter, and the therapy delivery may be controlled based on the determined mood state. In some embodiments, the therapy delivery is stopped prior to determining the patient mood state and the therapy delivery is restarted upon detecting a negative mood state. In other embodiments, therapy delivery is delivered until a positive mood state is detected, at which point the therapy delivery may be stopped.
摘要:
This disclosure describes generation of electrical stimulation pulses for electrical stimulation therapy. The stimulation pulses have a pulse current level and pulse width, and may be generated by a current regulator. The pulse voltage level may be a voltage level delivered by the current regulator while maintaining regulation of the pulse current level. During delivery of a pulse, a supply voltage level may decrease due to discharging of a supply capacitance, and the pulse voltage level may increase due to charging of a load capacitance. The pulse current level may be controlled to decrease during the pulse width such that a sum of the pulse voltage level and a headroom voltage of the current regulator does not exceed the supply voltage level. In some examples, the pulse may include sub-pulses with different sub-pulse current levels, where an earlier sub-pulse has a higher pulse current level than a later sub-pulse.
摘要:
Method, controller and system for an implantable medical device having a plurality of electrodes, the implantable medical device capable of delivering therapeutic stimulation to a patient, comprising a control module, a user interface operatively coupled to the control module, the user interface providing control of the control module by a medical professional or other user, and an electrode interface operatively coupled between the plurality of electrodes and the control module. The control module uses the electrode interface to obtain a plurality of measurements of impedance values for a plurality of selected pairs of individual ones of the plurality of electrodes. The control module flags electrodes using the plurality of measurements of impedance values of the selected pairs of individual ones of the plurality of electrodes comparative to a range, and the delivery of therapy on flagged electrodes is inhibited.
摘要:
A programmer allows a clinician to identify combinations of electrodes from within an electrode set implanted in a patient that enable delivery of desirable neurostimulation therapy by an implantable medical device. The programmer executes an electrode combination search algorithm to select combinations of electrodes to test in a non-random order. According to algorithms consistent with the invention, the programmer may first identify a position of a first cathode for subsequent combinations, and then select electrodes from the set to test with the first cathode as anodes or additional cathodes based on the proximity of the electrodes to the first cathode. The programmer may store information for each combination tested, and the information may facilitate the identification of desirable electrode combinations by the clinician. The clinician may create neurostimulation therapy programs that include identified desirable program combinations.
摘要:
This disclosure describes delivery of omnipolar electrical stimulation with an external electrical stimulator. Omnipolar electrical stimulation may involve stimulation with an electrode carried on the housing of an implantable medical device (IMD) while substantially simultaneously delivering stimulation via one or more implanted electrodes having the same polarity as the electrode on the housing. An external medical device (EMD) may simulate the IMD housing electrode with an electrode separate from the electrodes carried on leads implanted near target tissue. This electrode may be an external electrode carried on the external housing of the EMD or an external patch electrode. Alternatively, the electrode may be an implantable electrode coupled to the EMD. The conductivity of the external or implantable electrode may also be optimized to approximate the conductivity of the IMD housing electrode. This electrode coupled to the EMD may be utilized during trial stimulation or chronic, external, stimulation.
摘要:
Method, controller and system for an implantable medical device capable of delivering therapeutic stimulation through a plurality of electrodes. A control module is operable to conduct a plurality of measurements of impedance values creating a plurality of measured impedance values for a plurality of selected sets of individual ones of the plurality of electrodes based on a plurality of active parameters. The control module conducts the plurality of measurements of impedance values in a plurality of stages in which at least one of said plurality of active parameters is varied between individual ones of the plurality of stages.
摘要:
A programmer allows a clinician to identify desirable combinations of electrodes from within an electrode set implanted in a patient that enable delivery of desirable neurostimulation therapy by an implantable medical device. The clinician may create neurostimulation therapy programs that include identified desirable electrode combinations. In some embodiments, the clinician may use the programmer to select a program, such as a program identified during a neurostimulation programming session, and direct the programmer to replicate the selected program. The programmer may change one or more parameters of the selected program, such as pulse amplitude or duty cycle, when generating the copy of the selected program. In some embodiments, the programmer may associate each of a plurality of programs identified during a neurostimulation therapy programming session with one or more program categories, and may automatically generate program groups that include two or more of the programs based on the program categories.
摘要:
Techniques for shifting between two electrode combinations. An amplitude of a first electrode combination is incrementally decreased while an amplitude of a second, or subsequent, electrode combination is concurrently incrementally increased. Alternatively, an amplitude of the first electrode combination is maintained at a target amplitude level while the amplitude of the second electrode combination is incrementally increased. The stimulation pulses of the electrode combinations are delivered to the patient interleaved in time. In this manner, the invention provides for a smooth, gradual shift from a first electrode combination to a second electrode combination, allowing the patient to maintain a continual perception of stimulation. The shifting techniques described herein may be used during programming to shift between different electrode combinations to find an efficacious electrode combination. Additionally, the techniques may be used for shifting between different electrode combinations associated with different stimulation programs or program sets.
摘要:
An implantable medical device having an implantable power source such as a rechargeable lithium ion battery. The implantable medical device includes a recharge module that regulates the recharging process of the implantable power source using closed-loop feedback control. The recharge module includes a recharge regulator, a recharge measurement device monitoring at least one recharge parameter, and a recharge regulation control unit for regulating the recharge energy delivered to the power source in response to the recharge measurement device. The recharge module adjusts the energy provided to the power source to ensure that the power source is being recharged under safe levels.