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U.S. Department of Health and Human Services

Post-Approval Studies (PAS) Database

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The FDA has the authority to require sponsors to perform a post-approval study (or studies) at the time of approval of a premarket approval (PMA), humanitarian device exemption (HDE), or product development protocol (PDP) application. Post-approval studies can provide patients, health care professionals, the device industry, the FDA and other stakeholders information on the continued safety and effectiveness (or continued probable benefit, in the case of an HDE) of approved medical devices. This database allows you to search Post-Approval Study information by applicant or device information.

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Extended f/u Premarket Cohort

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Study Status Progress Inadequate
Application Number P170043 / PAS001
Date Current Protocol Accepted 04/30/2020
Study Name Extended f/u Premarket Cohort
General Study Protocol Parameters
Study Design Prospective Cohort Study
Data Source New Data Collection
Comparison Group Objective Performance Criterion
Analysis Type Analytical
Study Population Adult: >21
Detailed Study Protocol Parameters
Study Design Description The objective of this post approval study (PAS) is to evaluate the long -term rate of clinically relevant complications associated with iStent inject® placement and stability in subjects who have completed participation of the IDE clinical trial (GC-008). This is a long-term safety, multicenter, observational study with no planned interventions.
Study Population Description Randomized subjects in the GC-008 study who are able to understand the study requirements, willing to follow study instructions and are willing to return for required study follow-up visits.
Sample Size Up to 475 eyes of 475 subjects. This is based on the number of randomized subjects who consented to 36-month follow-up in study Protocol the GC-008 and study followed for 24 months. Subjects will need to meet the study inclusion criteria.
Data Collection Safety Endpoint:

The rate of clinically relevant complications associated with iStent inject placement and stability as determined at 60 months. Specific

device-related complications include clinical sequelae resulting from device position including, but not limited to:

Secondary surgical intervention (SSI) to modify device position

(e.g., repositioning or explantation)

Corneal endothelial touch by device

Corneal edema leading to best-spectacle corrected visual acuity

loss (BSCVA loss) > 2 lines at the Month 60 visit, in comparison

with preoperative BSCVA

Other Safety Outcomes:

Rate of occurrence of sight-threatening adverse events including:

Persistent (at time of study exit) BSCVA loss = 3 lines

compared to best recorded BSCVA at any postoperative visit


Corneal decompensation

Retinal detachment

Severe choroidal hemorrhage or detachment or aqueous misdirection

Rate of ocular secondary surgical interventions (SSI)

Rate of other adverse events including:

Increase from baseline IOP of greater than or equal to 10 mmHg at any time greater than or equal to 30 days postoperative

BSCVA loss greater than or equal to 2 lines at Month 60 compared to screening

BSCVA loss greater than or equal to 2 lines at Month 60 compared to best recorded

BSCVA at any postoperative visit

Device movement, defined as a stent not visible in the original location, that does not result in clinically relevant complications as described above (e.g., SSI to modify device position, corneal endothelial touch by device, or corneal edema leading to BSCVA loss > 2 lines at the Month 60 visit

compared to preoperative BSCVA), and that is not attributable to any one or more of the following:

- variations in gonioscopy, optical coherence tomography

(OCT) or ultrasonic biomicroscopy (UBM) (or other standard imaging methods) viewing angle or illumination

- changes in angle anatomy due to concomitant findings such as resolution of hyphema

- changes in anterior chamber depth

- development of focal peripheral anterior synechiae (PAS)
Follow-up Visits and Length of Follow-up 60 months post-randomization in the IDE trial
Interim or Final Data Summary
Interim Safety Information Not reported
Actual Number of Patients Enrolled 8
Actual Number of Sites Enrolled 25
Patient Follow-up Rate 2% (8/475)
Study Strengths & Weaknesses This information will be included in the final report

Extended f/u Premarket Cohort Schedule

Report Schedule
Date Due
FDA Receipt
Applicant's Reporting Status
six month report 12/20/2018 12/20/2018 On Time
one year report 06/21/2019 06/14/2019 On Time
18 month report 12/20/2019 12/12/2019 On Time
two year report 06/20/2020 06/17/2020 On Time
final report 05/20/2021 05/20/2021 On Time

Contact Us

Mandated Studies Program
Food and Drug Administration
10903 New Hampshire Ave.
Silver Spring, MD 20993-0002
Email: MandatedStudiesPrograms@fda.hhs.gov

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