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U.S. Department of Health and Human Services

Post-Approval Studies

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Post-Approval Studies

  • In January 2005, the oversight responsibility of the Post-Approval Studies Program was transferred to the Division of Epidemiology (DEPI) of the Office of Surveillance and Biometrics (OSB)/Center for Devices and Radiological Health (CDRH).
  • The CDRH Post-Approval Studies Program encompasses design, tracking, oversight, and review responsibilities for studies mandated as a condition of approval of a premarket approval (PMA) application, protocol development product (PDP) application, or humanitarian device exemption (HDE) application. The program helps ensure that well-designed post-approval studies (PAS) are conducted effectively and efficiently and in the least burdensome manner.
  • CDRH has established an automated, internal tracking system that efficiently identifies the reporting status of active PAS studies ordered since January 1, 2005 based on study timelines incorporated in study protocols and agreed upon by the CDRH and applicants. This system represents CDRH's effort to ensure that all PAS commitments are fulfilled in a timely manner.
  • In addition, CDRH launched this publicly available webpage to keep all stakeholders informed of the progress of each PAS. The webpage displays general information regarding each PAS, as well as the overall study status (based on protocol-driven timelines and the adequacy of the data) and the applicant's reporting status for each submission due.


Contact Information

Julie Unger
Project Manager, Post-Approval Studies Program
Food and Drug Administration
10903 New Hampshire Ave
WO66-4206v Silver Spring, MD

Phone: (301) 796-6134
Fax: (301) 847-8140

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Application Number P100022
Current Protocol Accepted 01/13/2015
Study Name Zilver PTX Stent PAS
Study Status Progress Inadequate
Study Progress Reason Follow-up rate below 80%
General Study Protocol Parameters
Study Design Prospective Cohort Study
Study involve follow-up of premarket cohort (Y/N) Yes
Data Source New Data Collection
Comparison Group No Control
Analysis Type Descriptive
Study Population Transit. Adolescent B (as adults) : 18-21 yrs, Adult: >21
Detailed Study Protocol Parameters
Study Design Description A prospective, single-arm, multi-center study. Includes all subjects from the new US enrollment study, the   show the rest ...
Study Population Description Comprises of PAS 1 subjects, the Zilver PTX subjects from the pivotal study, and earliest   show the rest ...
Sample Size The sample size will comprise of 200 patients from the new US Enrollment enrolled from   show the rest ...
Data Collection Target lesion revascularization (TLR), patency by duplex ultrasonography, and stent thrombosis assessed annually through 5   show the rest ...
Followup Visits and Length of Followup 5 years

Annual follow-up through 5 years

Zilver PTX Stent PAS Schedule

Report Schedule
Date Due
FDA Receipt
Reporting Status
six month report 05/15/2013 05/14/2013 On Time
one year report 11/14/2013 11/14/2013 On Time
18 month report 05/15/2014 05/14/2014 On Time
2 year report 11/14/2014 11/13/2014 On Time
three year report 11/14/2015    
four year report 11/13/2016    
five year report 11/13/2017    

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