A modified polyisobutylene-based polymer, method of making, and a medical device that includes such polymer, wherein the modified polyisobutylene-based polymer includes urethane, urea, or urethane-urea groups, hard segments, and soft segments, wherein the soft segments comprise phenoxy-containing polyisobutylene residues, and the hard segments include diisocyanate residues and optionally chain extender residues.

Systems and methods involving implants positioned within implant pockets through minimally invasive entrance incisions, along with related implants. In some implementations, implants may be folded, rolled, or otherwise compressed to fit within subcutaneous implant pockets, after which they may be decompressed to fit within an implant pocket having one or more dimensions substantially larger than the entrance incision. Such implants may be used for a variety of purposes, including generating electrical energy for various other implants located throughout the body.

Techniques are disclosed for implementing the use of electrically evoked compound action potentials (ECAPs) to adaptively adjust parameters of high frequency electrical stimulation. In one example, a medical device delivers electrical stimulation therapy comprising a train of electrical stimulation pulses to a patient, wherein the train of electrical stimulation pulses comprises a pulse frequency greater than or equal to 500 Hertz. After delivering the train of electrical stimulation pulses, the medical device ceases delivery of the high frequency electrical stimulation therapy for a predetermined period of time. During the predetermined period of time, the medical device senses an ECAP from the patient and determines, based on the sensed ECAP, a value of a parameter at least partially defining the train of electrical stimulation pulses. Responsive to the predetermined period of time elapsing, the medical device resumes delivery of the high frequency electrical stimulation according to the determined parameter.

Systems and methods involving implants positioned within implant pockets through minimally invasive entrance incisions, along with related neurostimulatory implants. In some implementations, implants may be folded, rolled, or otherwise compressed to fit within subcutaneous implant pockets, after which they may be decompressed to fit within an implant pocket having one or more dimensions substantially larger than the entrance incision. Such implants may be used for a variety of purposes, including generating electrical energy for various other implants, including neurostimulatory implants located throughout the body.

In the present invention, an IPG incorporates electrical resistivity monitoring with a reflectometry trigger. The IPG is configured to determine both optically and electrically if migration occurs between the electrodes. If the light intensity variation in the optical trigger is greater than an optical threshold value, then the system will pause stimulation and conduct a resistivity test. A resistivity test is also conducted periodically in the absence of the reflectometry trigger to verify that no lead migration has occurred. The stimulation signal is automatically adjusted if a variation in resistivity values is detected above a resistivity threshold value. The resistivity threshold value is set above the normal variation that occurs due to routine movement of the spinal cord in the spinal canal.

An implantable pulse generator (IPG) including a case containing an energy storage device and one or more electrode leads. A header is coupled to the case. The header includes a cassette, an antenna coupled to the cassette and electrically coupled to the case, the case configured as a part of the antenna for receiving and transmitting electromagnetic signals, and an electrode attachment structure configured to couple with the cassette and configured to couple with the one or more electrode leads.

Methods and systems for electrical stimulation can include obtaining a biosignal of the patient; altering at least one stimulation parameter of an electrical stimulation system in response to the biosignal; and delivering an electrical stimulation current to one or more selected electrodes of the electrical stimulation system using the at least one stimulation parameter. In some embodiments, a power spectrum is determined from the biosignal. In some embodiments, the biosignal is at least two different biosignals measured at the same or different locations on the patient and a coherence, correlation, or association between the two biosignal is determined.

An Example of a system for providing a patient with pain management may include a sleep monitoring circuit, a pain relief device, and a control circuit. The sleep monitoring circuit may be configured to sense one or more sleep signals from the patient and to determine a sleep state of the patient using the one or more sleep signals. The one or more sleep signals may include one or more physiological signals corresponding to the sleep state of the patient. The pain relief device may be configured to deliver one or more pain relief therapies. The control circuit may be configured to control the delivery of the one or more pain relief therapies using therapy parameters and to adjust the therapy parameters based on the determined sleep state.

Pump assemblies and systems are provided. For example, a pump assembly comprises a pump head, a bezel surrounding an outer perimeter of the pump head, a motor, and tubing. The bezel comprises a bezel upper side, a bezel lower side opposite the bezel upper side, a bezel inlet side extending from the bezel upper side to the bezel lower side, and a bezel outlet side opposite the bezel inlet side and extending from the bezel upper side to the bezel lower side. The bezel defines an inlet channel on the bezel inlet side and an outlet channel on the bezel outlet side, each of the inlet channel and the outlet channel guiding the tubing into the pump head. An exemplary pump system comprises a plurality of pump assemblies that each supply a fluid to a cooling circuit and a base for supporting the plurality of pump assemblies.

Methods are disclosed for treating a subject having a disease or disorder comprising stimulating a nerve of the subject with a corrective stimulus pattern derived from a disease-specific, condition-specific, endogenous mediator-specific or pharmacologic agent-specific neurogram in an amount and manner effective to treat the disease or disorder.