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There are two types of neurostimulation systems: one that is completely internal (surgically implanted) and one with both internal and external components. For a totally implantable neurostimulation system, the power source (battery) and lead(s) are surgically implanted. In the other type of system, a radio-frequency receiver and leads are implanted, and the power source is worn externally with an antenna over the receiver. Each neurostimulation system consists of:
The neurostimulation system is typically implanted in a two-stage procedure, separated by a trial screening period lasting approximately 1 to 10 days. Stage 1 involves implantation of a lead for trial screening, and Stage 2 involves implantation of the complete neurostimulation system (either the totally implantable system or the radio-frequency system). (See the Screening and Implant Techniques section for more information.) [Top]How Neurostimulation Controls Pain Neurostimulation delivers low voltage electrical stimulation to the spinal cord or targeted peripheral nerve to block the sensation of pain. One theory, the Gate Control Theory of pain developed by researchers Ronald Melzack and Patrick Wall, proposes that neurostimulation activates the body's pain inhibitory system. According to this theory, there is a gate in the spinal cord that controls the flow of noxious pain signals to the brain. The theory suggests that the body can inhibit these pain signals or "close the gate" by activating certain non-noxious nerve fibers in the dorsal horn of the spinal cord. The neurostimulation system, implanted in the epidural space, stimulates these pain-inhibiting nerve fibers, masking the sensation of pain with a tingling sensation (paresthesia).1,2 Neurostimulation may be the appropriate treatment for the management of certain chronic pain conditions, including: Failed Back Syndrome (FBS), Complex Regional Pain Syndrome (CRPS), and arachnoiditis. (See the Patient Selection section for a more detailed list of conditions and Important Safety Information and Risks for specific indications.) 1Melzack R, Wall PD. Pain mechanisms: A new theory. Science. 1965; 150(699):971-9. 2Shealy CN, Mortimer JT, Reswick JB. Electrical inhibition of pain by stimulation of the dorsal columns: Preliminary clinical report. Anesth Analg. 1967; 46(4):489-91. [Top]The goal of neurostimulation is to reduce rather than eliminate pain. Published studies of the therapy have shown that when used on carefully selected chronic pain patients, neurostimulation may:
These results may also lead to reduced hospitalizations and surgical procedures, reduced health care costs, greater independence, and improved quality of life.2,3,4 1Burchiel K, et al. Prospective, multicenter study of spinal cord stimulation for relief of chronic back and extremity pain. Spine.1996; 21(23):2786-2794. 2North R, et al. Failed back surgery syndrome: 5-year follow-up after spinal cord stimulator implantation. J Neurosurg.1991; 28 (5): 692-699. 3North R, et al. Spinal cord stimulation for chronic, intractable pain: experience over two decades. J Neurosurg.1993; 32 (3): 384-395. 4Racz G, et al. Percutaneous dorsal column stimulator for chronic pain control. Spine.1989; 14 (1): 1-4. [Top] The Medtronic Family of Premium Neurostimulation Systems Medtronic offers you the broadest variety of neurostimulation systems to relieve chronic pain. Our premium neurostimulators — RestoreULTRA™, RestoreADVANCED® and PrimeADVANCED®— provide programming enhancements to help you quickly identify the settings that provide optimal relief. The following programming features are included on all Medtronic premium neurostimulators. TARGETSTIM™
TARGETmySTIM™
AUTOFILL™
GROUPADJUST™
OPTIMIZER™
PROGRAM myStim®
myStim® DIARY
[Top] ULTRA Smart Neurostimulator RestoreULTRA was designed to help you target the sweet spot and relieve complex pain:
*Recharge intervals vary based on parameter settings. For more information visit www.restoreultra.com [Top] RESTOREADVANCED™ and PRIMEADVANCED™ Neurostimulators Targeting Pain Relief…with Accuracy and Simplicity RESTOREADVANCED and PRIMEADVANCED provide powerful, yet simple programming features, making the management of chronic pain easier for you and your patients. Chronic Pain…Under Control RESTOREADVANCED and PRIMEADVANCED are characterized by the ease and efficiency with which they can be programmed to help relieve chronic pain. For clinicians, that means establishing settings quickly. For people with pain, it's the ability to easily select from multiple groups to find the therapy that offers greatest comfort. With the ADVANCED line of neurostimulators, programming is made easier with:
Two Neurostimulators…One Approach to Relieving Pain
RESTOREADVANCED Neurostimulator
PRIMEADVANCED Neurostimulator
Programming Pain Relief with myStim®
[Top] Medtronic engineers and C. Norman Shealy, M.D., developed the first neurostimulation system in the 1960s. Since the first system was implanted in 1967, neurostimulation technology has undergone significant advancements, including refinements in patient selection criteria, and equipment design, flexibility, reliability, and lifespan. Medtronic's neurostimulation systems have helped thousands of chronic pain patients lead more comfortable and productive lives. [Top] |
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