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.
The leachables study will use eight (8) Prometra pumps as required in the condition
of approval. The solutions will be placebo solutions at the appropriate corresponding pHs. At each time-point pumps will be emptied of their contents through the catheters and 15 mLs of solution will be used for leachable testing. Pumps will then be refilled with 22 mL of placebo solutions. This schedule mimics actual use of the pumps (dispensing and refilling) and will allow sufficient sample for the leachables testing.
Controlled Extraction Study
The control extraction studies will involve the evaluation of extraction solutions of the materials of the Prometra pumps that come into contact with the drug product formulation. The accelerated extractions will be done using an Accelerated Solvent Extraction. The solvents to be used for extraction are purified water, water adjusted to pH 9.5, isopropanol, and hexane. The materials of the pump will be extracted in each of these solvents at reflux for 24 hours.