Study of an Implantable Functional Neuromuscular Stimulation System for Patients With Spinal Cord Injuries

Case Western Reserve University

Status: Completed

Conditions: Spinal Cord Injury

Treatments: Device: IRS-8; Procedure: Surgery

Study type: Interventional

Funder types: Other

Identifiers

NCT00004445

CWRU-FDR001244 (Other Grant/Funding Number)

199/13455

Details and patient eligibility

About

OBJECTIVES:

I. Establish the procedures for implementing and assessing the clinical utility of functional neuromuscular stimulation using an implanted eight-channel standing and transfer system in patients with incomplete tetraplegia or paraplegia.

II. Develop and apply quantitative functional evaluations of system performance in these patients.

III. Perform long term follow up and monitor system use outside of the laboratory.

Full description

PROTOCOL OUTLINE: Patients undergo surgery in which electrodes are sutured into areas of the pelvis and legs. Electrode leads are inserted into a receiver/stimulator implanted in a subcutaneous pocket in the abdomen. Following implantation, patients undergo training in standing, transfers, and other advanced mobility skills using the functional neuromuscular stimulation system. Restricted activity continues for 2 weeks after surgery, followed by 8 weeks of exercise. Standing training then begins, and continues for up to 6 weeks. Home-based training follows prior to discharge with the system for spontaneous use.

Patients are followed at 3, 6, and 12 months, then annually thereafter.

Enrollment: 18 patients

Sex: All

Ages: 18+ years old

Volunteers: No Healthy Volunteers

Inclusion criteria

Low cervical or thoracic spinal cord injuries (C6-T12) Must be skeletally mature ASIA impairment scale A (complete motor and sensory deficits), B (sensory sparing), or C (motor and sensory sparing) Intact lower motor neurons Greater than 6 months since injury Range of motion within normal limits No renal compromise No cardiac abnormalities No circulatory compromise No pulmonary compromise No acute or chronic psychological problems or chemical dependency No acute orthopedic complications (scoliosis, history of spontaneous fractures, dislocations, etc.) No acute medical complications (no skin breakdowns, uncontrolled seizures, immunological compromise, etc.)

Exclusion criteria

Failure to meet inclusion criteria

Trial design

Primary purpose: Treatment

Allocation: N/A

Interventional model: Single Group Assignment

Masking: None (Open label)

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18 participants in 1 patient group

Implanted Neuroprosthesis

Experimental group

Description:

Volunteers are evaluated for appropriateness for inclusion in the study on an intent-to-treat basis. Qualifying candidates all receive the implanted neuroprosthesis and participate in post-operative training and follow-up procedures. Interventions include: Procedure/Surgery Rehabilitation/Exercise Device includes: IRS-8 Stimulating Electrodes External Controller

Treatment:

Procedure: Surgery

Device: IRS-8