An Implantable Microneuromodulator for the Treatment of Chronic Shoulder Pain in Chronic Post-Stroke Subjects

NCT ID: NCT00567541

Last Updated: 2016-04-01

Basic Information

• Recruitment Status: COMPLETED
• Clinical Phase: PHASE2
• Total Enrollment: 16 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2007-06-30
• Study Completion Date: 2012-12-31

Brief Summary

The goal of this research study is to investigate safety and gather initial effectiveness data for a new implanted device designed to treat chronic shoulder pain in chronic post-stroke subjects. The BBPM weighs less than 0.03 ounces and measures 1" x 0.1". It is implanted into the shoulder to stimulate the axillary nerve. Stimulation of this nerve may reduce shoulder pain, reduce shoulder subluxation, improve motion, improve function, and possibly decrease use of pain medication. CAUTION--Investigational device. Limited by Federal law to investigational use.

Detailed Description

This is a prospective, multi-center, randomized, controlled, double-blinded parallel study designed to evaluate feasibility and safety. The primary purpose of this study is to demonstrate the clinical feasibility of implanting the BBPM near a peripheral nerve for the treatment of chronic, intractable, pain in this case represented by chronic regional shoulder pain in hemiplegic stroke patients. This is a 48-week efficacy study with safety data collection throughout the study period and up to 2 years for all available subjects. Each study arm will receive therapeutic level stimulation for a total of 12 consecutive weeks (Weeks 1-12 for Active treatment group and Weeks 24-36 for the sham group) during the 48 weeks.

Conditions

Shoulder Pain Chronic

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: PARALLEL
• Primary Study Purpose: TREATMENT
• Blinding Strategy: TRIPLE

Study Groups

Active BBPM stimulation

Therapeutic Stimulation is applied via the Battery Powered Microneuromodulator (BBPM) which is programmed to deliver set stimulation parameters with approximate frequency of 30 Hz, current 5mA for 200 microseconds for the first 12 weeks of the study. The BBPM is implanted near the axillary nerve within the quadrilateral space.

Group Type: ACTIVE_COMPARATOR

Battery Powered Microneuromodulator (BBPM)

Intervention Type: DEVICE

The Battery Powered Microneuromodulator (BBPM) is programmed to deliver bursts of electrical stimulation to deliver therapeutic stimulation beginning with a frequency of 30Hz, current of 5mA, for 200 microseconds. These settings were applied to deliver greater or lesser intensity based on study arm (active vs placebo).

Sham BBPM stimulation

The Battery Powered Microneuromodulator is implanted near the axillary nerve within the quadrilateral space. The BBPM is programmed for the first 12 weeks of the study to deliver short bursts of extremely low amplitude electrical stimulation at very wide time intervals to give appearance, impression, and sensation of therapeutic treatment. After 24 weeks, the device will be reprogrammed to deliver therapeutic stimulation over a 12 week period.

Group Type: PLACEBO_COMPARATOR

Battery Powered Microneuromodulator (BBPM)

Intervention Type: DEVICE

The Battery Powered Microneuromodulator (BBPM) is programmed to deliver bursts of electrical stimulation to deliver therapeutic stimulation beginning with a frequency of 30Hz, current of 5mA, for 200 microseconds. These settings were applied to deliver greater or lesser intensity based on study arm (active vs placebo).

Interventions

Battery Powered Microneuromodulator (BBPM)

The Battery Powered Microneuromodulator (BBPM) is programmed to deliver bursts of electrical stimulation to deliver therapeutic stimulation beginning with a frequency of 30Hz, current of 5mA, for 200 microseconds. These settings were applied to deliver greater or lesser intensity based on study arm (active vs placebo).

Intervention Type: DEVICE

Other Intervention Names

Bioness Battery Powered Microneuromodulator

Eligibility Criteria

Inclusion Criteria

• 18 years of age or older
• Chronic post-stroke duration greater than or equal to 6 months
• Unilateral hemiplegic shoulder pain persisting for ≥6 months
• Hemiparesis (shoulder abduction graded <5/5 on Manual Muscle Testing ipsilateral to the shoulder in which the subject has chronic pain
• Shoulder pain ≥ 6/10 (on 0-10 numeric rating scale (NRS) for worst pain in last week (BPI #12))
• Ability to give informed consent and understand study requirements
• Ability to quantify pain using a 0-10 numeric rating scale. (A screening tool will be used to ensure that participants can rate 3 common pain scenarios (mosquito bite, stubbed toe and broken bone) on a 0-10 NRS relative to each other.)
• Willing and able to understand and comply with all study-related procedures during the course of the study
• Motivated to maintain an accurate diary for the study duration

Exclusion Criteria

• Hemineglect (i.e., extinguish to double simultaneous stimulation)
• Shoulder trauma or diagnosed shoulder pathology prior to stroke; history of any shoulder surgery, regardless of whether procedure preceded for followed stroke.
• Need to take >1 pain medication (opioid or non-opioid) for shoulder pain
• Regular use of pain medication for chronic pain other than shoulder pain
• Anticoagulated (taking warfarin or heparin, including fractionated heparin) or has a bleeding disorder
• Unable, per their prescribing physician, to stop antiplatelet medications (e.g., aspirin, ticlopidine (Ticlid), clopidogrel (Plavix), tirofiban (Aggrastat), and eptifibatide (Integrilin)) for at least 7 days prior to device implantation.
• Cardiac pacemaker
• Implanted neurostimulator (e.g., spinal cord, deep brain, vagus nerve) or implanted pump or infusion device
• Prosthetic heart valve or valvular heart disease requiring antibiotic prophylaxis
• History of cardiac arrhythmia with hemodynamic instability
• Uncontrolled seizures (> 1 seizure per month)
• Pregnant or plan on becoming pregnant during the study period
• Medical instability
• Currently require, or likely to require, diathermy
• Currently require, or anticipated to require, MRI within 8 weeks of projected device implantation date
• History of adverse reactions to local anesthetic (e.g., lidocaine)

• Minimum Eligible Age: 18 Years
• Maximum Eligible Age: 85 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: No

Sponsors

Bioness Inc

INDUSTRY

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Principal Investigators

Andrew Friedman, MD

Role: PRINCIPAL_INVESTIGATOR

Virginia Mason Seattle Main Clinic

Tim Deer, MD

Role: PRINCIPAL_INVESTIGATOR

The Center for Pain Relief

Ziyad Ayyoub, M.D.

Role: PRINCIPAL_INVESTIGATOR

Rancho Los Amigos National Rehabilitation Center

Locations

Rancho Los Amigos National Rehabilitation Center

Downey, California, United States

Virginia Mason Medical Center

Seattle, Washington, United States

The Center for Pain Relief

Charleston, West Virginia, United States

Countries

United States

Other Identifiers

CP-BBPM-001

Identifier Type: -

Identifier Source: org_study_id