Vantas Implant Retrieval Study
The main study objective was to collect implant retrieval information in 10 patients using Vantas®, the 50 mg histrelin implant. Patients who had been identified as having a difficult to locate or non-palpable implant were to have been enrolled. Sites were to adhere to the instructions in the Package Insert, which included specialized investigations such as ultrasound, CT, and MRI, to be used for the location and removal of implants.
|Study Design:||Observational Model: Cohort
Time Perspective: Cross-Sectional
|Official Title:||Phave IV, Multicenter, Open-label Study to Collect VANTAS® Implant Retrieval Data From Patients With Advanced Prostate Cancer and Difficult to Remove Implants|
- The number (and percent) of successfully located and removed implants was the primary outcome measure. [ Time Frame: cross-sectional design, data collected at time of explant procedure. ] [ Designated as safety issue: Yes ]
|Study Start Date:||July 2006|
|Study Completion Date:||June 2007|
|Primary Completion Date:||June 2007 (Final data collection date for primary outcome measure)|
Patients treated with Vantas implant
Patients were enrolled if they had had a Vantas implant placed for treatment of adenocarcinoma of the prostate, and if the patients were scheduled for explant of the implant, and the physician had difficulty locating the implant.
Procedure: Ultrasound or CT or MRI to locate implant
Scanning methods (eg, ultrasound, CT, or MRI) were used to locate the implant.
Other Name: Vantas
Up to 50 centers using Vantas, the recently approved histrelin implant as part of their urology practice for treating patients with advanced prostate cancer, were to be identified for participation in this Phase IV post-marketing trial. Up to 10 patients who had been implanted with Vantas at these participating centers, and who had difficult to locate or non-palpable implants at the time of removal, were to be enrolled in this trial. A Screening Visit was to be conducted to consent the patient and to collect basic medical and safety information for patient participation. Upon patient enrollment, up to three subsequent Visits (Visits 1, 2, and 3) were to be conducted (within 2 weeks of the Screening Visit). The investigator was to locate and remove the implant by following the instructions provided in the protocol. Methods for location of the implant included ultrasound, CT, or MRI procedures. The visit at which the implant was successfully located and removed was to be the final study visit for the patient. Upon successful retrieval of the implant or a determination that, per Study Instructions, the implant cannot be located/removed, the study was completed for the patient. No information was to be collected on re-implantation of a new implant. Safety was to be monitored throughout the two week study. Blood samples for testosterone and PSA were only collected at the Screening Visit. The implants removed from the patients were to be returned to Indevus Pharmaceuticals for analysis.