			Home About us Contact

Stimulation Devices (stimulation + device)

Distribution by Scientific Domains

Medical Sciences	100%

Selected Abstracts

NANS Training Requirements for Spinal Cord Stimulation Devices: Selection, Implantation, and Follow-up

NEUROMODULATION, Issue 3 2009
Jaimie M. Henderson MD
[source]

Deep Brain Stimulation Devices: A Brief Technical History and Review

ARTIFICIAL ORGANS, Issue 3 2009
Robert J. Coffey
Abstract Deep brain stimulation (DBS),a broadly accepted therapeutic modality with tens of thousands of patients currently implanted,is the application of implantable electrical stimulation devices to treat neurological disorders. Approved indications include involuntary movement disorders; investigational applications include epilepsy, selected psychiatric disorders, and other conditions. DBS differs fundamentally from functional electrical stimulation and sensory prosthetics in that DBS therapies do not substitute for or replace injured tissues, organs, or body functions. DBS,targeted to particular brain nuclei or pathways that are specific for the disorder under treatment,influences brain function and behavioral output in ways that can relieve symptoms and improve the overall functioning of the patient. We will briefly review the history and present status of DBS from a technical and device-oriented perspective, with an eye toward future advances. [source]

Clinical Application of Peroneal Nerve Stimulator System Using Percutaneous Intramuscular Electrodes for Correction of Foot Drop in Hemiplegic Patients

NEUROMODULATION, Issue 4 2006
Yoichi Shimada MD
Abstract Objective., To assess the orthotic effect of a functional electrical stimulation device (Akita Heel Sensor System; AHSS) in the treatment of hemiplegic gait with foot drop. Materials and Methods., In the AHSS, a heel sensor is attached to a small plastic heel brace, and the peroneal nerve is stimulated via percutaneous intramuscular electrodes. During the swing phase of the hemiplegic gait, the common peroneal nerve is stimulated by the AHSS. Eight patients in chronic stages of hemiplegia participated in this study. Walking speeds and step cadences on a 10-m course were compared between walking with stimulation and walking without stimulation. Results., Mean walking speed (± SD) was 0.50 ± 0.26 m/sec without stimulation and 0.64 ± 0.31 m/sec with stimulation. The mean percentage increase in walking speed with stimulation was 30.1%. Mean step cadence was 31 ± 7 steps/10 m without stimulation and 27 ± 7 steps/10 m with stimulation. By correcting foot drop, the AHSS significantly increased walking speed and decreased cadence (p < 0.05). Conclusion., The AHSS can significantly improve walking in hemiplegic patients with foot drop. [source]

The relationship between subjective and objective assessments of sacral neuromodulation effectiveness in patients with urgency-frequency,

NEUROUROLOGY AND URODYNAMICS, Issue 8 2008
Kenneth M. Peters
Abstract Aims Global response assessment (GRA) has been used to evaluate patients' perceptions of treatment effectiveness. However, few studies have scrutinized the relationship between GRAs and objective voiding diary outcomes data. This study explores the relationship between self-reported symptom-specific GRA responses and objective changes in frequency, urgency and pelvic pain in patients with urgency-frequency with or without pelvic pain after implantation of a prosthetic sacral nerve stimulation device. Methods Patients scheduled for a staged procedure were enrolled in a prospective, observational, longitudinal study. Post implantation, patietns were grouped into "responders" or "non-responders" based on their answers to symptom-specific GRAs at three and six months. Treatment responders were defined as those reporting "moderately" or "markedly improved" on a 7-point scale, and all others were considered non-responders. Pre- and post-implant changes in mean 24-hour voiding frequency, voided volume, urgency and pelvic pain scores as recorded on voiding diaries were compared between groups using paired t-test. Results At three months, responders demonstrated corresponding statistically significant improvement in voiding frequency (P,<,0.001), average voided volume (P,=,0.003), urgency (P,=,0.022) and pelvic pain (P,=,0.039). At six months, responders demonstrated statistically significant improvements in frequency (P,=,0.025) and urgency (P,=,0.006). None of the symptom changes were statistically significant in treatment non-responders. Conclusions The GRA non-responders groups' perceptions of treatment response agreed with their objective changes in bothersome symptoms and responders' changes agreed with their perception of improvement in the majority of symptoms. Further study is needed to standardize the GRA, and explore its potential for use in clinical practice. Neurourol. Urodynam. 27:775,778, 2008, © 2008 Wiley-Liss, Inc. [source]

Electric Parameters Optimization in Spinal Cord Stimulation.

NEUROMODULATION, Issue 4 2010
Study in Conventional Nonrechargeable Systems
Background:, Spinal cord stimulation devices provide a means of creating an electric field. The parameters used to produce this electric field are: pulse amplitude, pulse width (Pw), and pulse frequency (F). Aims:, The purpose is to document the effects that the various stimulus parameters have on patient perception of paresthesia and the relationship that this perception has on pain relief. Methods:, Stimulus parameters were varied independently keeping the electrode polarity constant while recording stimulation thresholds. The Pw was varied from 195 to 300 µsec while maintaining the frequency at 50 Hz. The F was varied from 10 to 100 Hz while maintaining the Pw at 300 µsec. We also measured the paresthesia coverage percentage and the subjective perception of quality reported by the patients with each one of the parameter changes. Results:, There was a statistically significant correlation between Pw and all the stimulation thresholds. As for the therapeutic range, the differences observed also were statistically significant. Pw variation did not produce significant differences in coverage and subjective quality of the paresthesia. The perception threshold did not vary significantly with F changes. However, F significantly affected both coverage of the painful area and paresthesia perception quality. Conclusions:, In the usual Pw ranges, it seems that its usefulness is limited to obtaining finer adjustments in the stimulation amplitude. Frequency management may be significantly useful to get a wider coverage of the stimulated area. [source]