Baerveldt Plate Area Comparison (BPAC) (BPAC)

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Know the risks and potential benefits of clinical studies and talk to your health care provider before participating. Read our disclaimer for details. Identifier: NCT01159314
Recruitment Status : Recruiting
First Posted : July 9, 2010
Last Update Posted : August 21, 2017
Information provided by (Responsible Party):
Johns Hopkins University

Brief Summary:

This research is being done to compare the safety and effectiveness of two sizes of the Baerveldt glaucoma implant.

A Baerveldt glaucoma implant is one of the most common types of glaucoma operations performed. This procedure works by providing a route by which fluid can drain out of the eye to decrease the intraocular pressure. The Baerveldt implant does this by placing a tube into the eye which shunts aqueous fluid to a silicone plate which is attached to the sclera (white portion of the eye). It is this plate that comes in two different sizes (250 square millimeters and 350 square millimeters).

Earlier studies have shown that larger plate sizes produce lower eye pressures but that they may also result in more complications. While both Baerveldt devices are currently in use and have been shown to be safe and effective, it is unclear if one is superior to the other. The purpose of this study is to see if one size of device works better with fewer complications.

Condition or disease Intervention/treatment Phase
Glaucoma Procedure: Baerveldt Device surgical Procedure Not Applicable

Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 270 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: Baerveldt Plate Area Comparison (BPAC)
Study Start Date : June 2010
Estimated Primary Completion Date : June 2019
Estimated Study Completion Date : June 2019

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Glaucoma
U.S. FDA Resources

Arm Intervention/treatment
Experimental: Arm A - Baerveldt 250 mm2
Patients receiving Baerveldt 250 mm2
Procedure: Baerveldt Device surgical Procedure
Implant surgery
Experimental: Arm B - Baerveldt 350 mm2
Patients receiving Baerveldt 350 mm2
Procedure: Baerveldt Device surgical Procedure
Implant surgery

Primary Outcome Measures :
  1. Visual Acuity [ Time Frame: Annual follow-up visits ]
    Visual acuity is an important outcome variable in the BPAC. Visual acuity is measured before pupil dilation, tonometry, gonioscopy, or any other technique that could affect vision. Two different techniques are used to measure visual acuity, including Snellen and ETDRS visual acuity testing. Visual acuity is measured at the Qualifying Assessment and at every follow-up visit. ETDRS visual acuity is required at the Qualifying Assessment and at the 1 year, 3 year, and 5 year follow-up visits

Information from the National Library of Medicine

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, Learn About Clinical Studies.

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

Inclusion Criteria:

  • Age over 18
  • IOP > 18 mm Hg and < 40 mm Hg on medical therapy
  • Previous ocular surgery limited to (cataract, corneal transplant, trabeculectomy, vitrectomy)
  • Consent signed

Exclusion Criteria:

  • Unwilling or unable to give consent, unwilling to accept randomization, or unable to return for scheduled protocol visits
  • Pregnant or nursing
  • NLP vision
  • Iris neovascularization or proliferative retinopathy
  • Epithelial or fibrous downgrowth
  • Chronic or recurrent uveitis
  • Steroid-induced glaucoma
  • Severe posterior blepharitis
  • Previous cyclodestructive procedure
  • Conjunctival scarring from prior ocular trauma or cicatrizing disease (e.g. Stevens Johnson syndrome, ocular pemphigoid) precluding Baerveldt implantation.
  • Functionally significant cataract
  • Need for Baerveldt implant combined with other ocular procedures (ie cataract surgery,penetrating keratoplasty, or retinal surgery) or anticipated need for additional ocular surgery
  • Prior glaucoma drainage device (tube) implant
  • Prior retinal surgery with remaining silicone oil
  • Prior scleral buckling procedures

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT01159314

Contact: Michael Boland, MD, Ph.D. 410-502-4074
Contact: Rhonda B Miller, COA 410-955-1779

United States, California
University of California - Davis Recruiting
Sacramento, California, United States, 95817-2307
Contact: James D Brandt, MD    916-734-6969   
Principal Investigator: James D Brandt, MD         
United States, Florida
U. Miami/Bascom Palmer Recruiting
Miami, Florida, United States, 33136
Contact: Sarah Wellik, MD   
Principal Investigator: Sarah Wellik, MD         
Sub-Investigator: Richard Lee, MD         
United States, Maryland
The Wilmer Eye Institute Recruiting
Baltimore, Maryland, United States, 21287
Contact: Michael Boland, Md, Ph.D    410-502-4074   
Contact: Rhonda B Miller, COA    410-955-1779   
Sub-Investigator: Henry D Jampel, MD, MHS         
Sub-Investigator: Harry Quigley, MD         
Sub-Investigator: Pradeep Ramulu, MD         
Sub-Investigator: David S Friedman, MD, MPH         
United States, New York
Mount Sinai School of Medicine Recruiting
New York, New York, United States, 10029
Contact: Janet Serle, MD    212-241-8979   
Principal Investigator: Janet Serle, MD         
United States, Pennsylvania
Wills Eye Institute Recruiting
Philadelphia, Pennsylvania, United States
Contact: Jonathan Myers, MD   
Principal Investigator: Jonathan Myers, MD         
Sub-Investigator: Marlene Moster, MD         
Sponsors and Collaborators
Johns Hopkins University
Principal Investigator: Michael Boland, MD, PhD Johns Hopkins University

Responsible Party: Johns Hopkins University Identifier: NCT01159314     History of Changes
Other Study ID Numbers: NA_00037146
First Posted: July 9, 2010    Key Record Dates
Last Update Posted: August 21, 2017
Last Verified: August 2017

Keywords provided by Johns Hopkins University:
Baerveldt Implants

Additional relevant MeSH terms:
Ocular Hypertension
Eye Diseases