This site became the new on June 19th. Learn more.
Show more Menu IMPORTANT: Listing of a study on this site does not reflect endorsement by the National Institutes of Health. Talk with a trusted healthcare professional before volunteering for a study. Read more... Menu IMPORTANT: Talk with a trusted healthcare professional before volunteering for a study. Read more... Menu
Give us feedback

Implanted Gluteal Stimulation System for Pressure Sore Prevention

This study has been withdrawn prior to enrollment.
(Suitable implanted technolgy was not available)
Information provided by (Responsible Party):
VA Office of Research and Development Identifier:
First received: February 11, 2008
Last updated: May 21, 2015
Last verified: May 2015
This project will evaluate the feasibility of using a fully implanted gluteal stimulation system for the prevention of Pressure ulcers. The specific goal of this study will be a pilot clinical trial of veterans with reduced mobility in order to establish clinical efficacy of a 2-channel bilateral gluteal stimulation system. A two-arm crossover study of wheelchair users with complete SCI will be carried out. All study participants will receive a fully implanted system incorporating implanted IM electrodes and a Micropulse I IPG stimulator (NDI Medical). Group assignments will be determined at enrollment using a modified randomization scheme. A total of 10 subjects will be recruited to the pilot clinical trial.

Condition Intervention
Pressure Ulcers Device: A fully implanted gluteal stimulation (GSTIM) system

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: None (Open Label)
Primary Purpose: Prevention
Official Title: Implanted Gluteal Stimulation System for Pressure Sore Prevention

Resource links provided by NLM:

Further study details as provided by VA Office of Research and Development:

Primary Outcome Measures:
  • The primary outcomes measures will be changes in tissue health variables and user satisfaction [ Time Frame: baseline, 4 weeks, and six months ]

Secondary Outcome Measures:
  • Progressive changes in muscle bulk and tissue blood flow will be evaluated using CT scanning and transcutaneous oxygen measurement [ Time Frame: baseline, 4 weeks, and six months ]
  • Pressure distribution changes over the long-term (due to muscle changes) and over the short-term (due to muscle contractions) will be assessed by interface pressure measurement. [ Time Frame: baseline, 4 weeks, and six months ]

Enrollment: 0
Study Start Date: September 2012
Study Completion Date: August 2014
Primary Completion Date: August 2014 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Arm 1 Device: A fully implanted gluteal stimulation (GSTIM) system
A fully implanted gluteal stimulation system

Detailed Description:
Within the scope of the study the aims will be to: (1. Develop the pre-implantation assessment protocol utilizing targeted CT to locate optimal gluteal motor points bilaterally.) CT assessment of the pelvic region in spinal cord injured subjects will be carried out to determine regional vascular and nervous anatomy. This will allow us to achieve optimal electrode placement using a minimally invasive implantation procedure. (2. Develop the implanted gluteal stimulation system.) The fully implanted gluteal stimulation (GSTIM) system is envisioned as a marriage between the established technology of the implanted IM electrodes developed by the Cleveland FES Center and the newly developed Micropulse I 2-channel stimulator. The Micropulse I IPG is a small, rechargeable stimulator developed by NDI Medical as a platform technology for neuromodulation and neurostimulation applications. The device will be customized in order to provide two synchronized channels of stimulation for the GSTIM system. (3. Implement and evaluate implanted gluteal stimulation system in human volunteers.) A pilot clinical trial of the fully implanted gluteal stimulation system will be carried out using a two-arm crossover study of ten wheelchair users at risk for pressure ulcer development due to impaired mobility. Pre-defined selection criteria will be employed to screen potential participants physically and psychologically. All participants will receive a stimulation system consisting of implanted IM electrodes inserted bilaterally in the gluteus maximus together with the Micropulse I stimulator implanted subcutaneously in the lower abdomen. Tissue health will be assessed at three month intervals during the 12-month period following implantation. The clinical application of this system is of great relevance to the veteran population at risk of pressure ulcer development. The project will add value to the continued improvement in health care provision for veterans, allowing them to benefit from the most recent advances in medical device technology. Although the initial target user group is veterans with SCI, the proposes system will have applications to other patient populations at risk due to reduced mobility, such as those with multiple sclerosis and the elderly.

Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

Motor and sensory complete SCI higher than the level T12.

Exclusion Criteria:

Eligible subjects will have had no open skin problems or hospitalizations during the three months prior to entrance into the study. Additional exclusion criteria relating to clinical factors and suitability include:

  1. Age less than 18 years.
  2. Less than two years post-injury or loss of independent walking ability.
  3. More than three urinary tract infections in the previous year.
  4. Significant active systemic disease, e.g. heart disease, renal failure, compromised renal function, diabetes.
  5. Abnormal nutritional status based on albumin and total protein levels at recruitment (3.0 for albumin, 6.0 for total protein).
  6. Osteomyelitis of the pelvic regional, indicated by positive pelvic inlet x-ray from routine annual urologic examination or bone scan.
  7. Previous surgery in the perineal region that radically alters the basic anatomy, particularly regional innervation and blood supply., e.g., amputation, hemipelvectomy.
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT00623948

United States, Ohio
Louis Stokes VA Medical Center, Cleveland, OH
Cleveland, Ohio, United States, 44106
Sponsors and Collaborators
VA Office of Research and Development
Principal Investigator: Kath M. Bogie, PhD Louis Stokes VA Medical Center, Cleveland, OH
  More Information

Responsible Party: VA Office of Research and Development Identifier: NCT00623948     History of Changes
Other Study ID Numbers: B4664-R
Study First Received: February 11, 2008
Last Updated: May 21, 2015

Keywords provided by VA Office of Research and Development:
Pressure ulcers
Electrical Stimulation
Spinal Cord Injury

Additional relevant MeSH terms:
Pressure Ulcer
Skin Ulcer
Skin Diseases processed this record on September 21, 2017