MAUDE Adverse Event Report: BOSTON SCIENTIFIC CORPORATION POLARIS? LOOP; STENT, URETERAL

Model Number	M0061552210
Medical Device Problem Codes	Deformation Due to Compressive Stress (2889); Difficult to Advance (2920); Material Split, Cut or Torn (4008)
Health Effect - Clinical Code	No Clinical Signs, Symptoms or Conditions (4582)
Date of Event	01/17/2024
Type of Reportable Event	Malfunction
Event or Problem Description
It was reported that a polaris loop ureteral stent was used during a lithotripsy for left ureter under ureteroscope.During the procedure and inside the patient, the stent could not be delivered and became torn.The procedure was completed with another of the same device and there were no patient complications reported.
Additional Manufacturer Narrative
Block h6: device code a0414 captures the reportable event of stent torn material.
Additional Manufacturer Narrative
Device code a0414 captures the reportable event of stent torn material.Upon receipt at our quality assurance laboratory, this polaris loop ureteral stent underwent a thorough analysis.Visual inspection of the device found that the stent shaft was buckled.The positioner was returned, however, the suture was not returned.A review of the device history record (dhr) indicated that the device met all material, assembly, and product specifications at the time of release to distribution.Based on the information available and analysis results, the reported allegation of stent torn material could not be confirmed.Regarding to the analysis performed to the returned device, it is possible to conclude that this issue could be caused by operational factors.If the positioner is advanced with excess force over the guidewire the stent can get buckled/accordioned resulting in a difficulty/unable to advance the stent to the target site.A conclusion code of adverse event related to procedure was assigned to this investigation.
Event or Problem Description
It was reported that a polaris loop ureteral stent was used during a lithotripsy for left ureter under ureteroscope.During the procedure and inside the patient, the stent could not be delivered and became torn.The procedure was completed with another of the same device and there were no patient complications reported.
Additional Manufacturer Narrative
Block h6: device code a0414 captures the reportable event of stent torn material.Upon receipt at our quality assurance laboratory, this polaris loop ureteral stent underwent a thorough analysis.Visual inspection of the device found that the stent shaft was buckled, which confirmed the reported event.The positioner was returned, however, the suture was not returned.A review of the device history record (dhr) indicated that the device met all material, assembly, and product specifications at the time of release to distribution.Based on the information available and analysis results, the reported allegation of stent torn material could not be confirmed.Regarding to the analysis performed to the returned device, it is possible to conclude that this issue could be caused by operational factors.If the positioner is advanced with excess force over the guidewire the stent can get buckled/accordioned resulting in a difficulty/unable to advance the stent to the target site.A conclusion code of adverse event related to procedure was assigned to this investigation.Correction to block h6: device code.
Event or Problem Description
It was reported that a polaris loop ureteral stent was used during a lithotripsy for left ureter under ureteroscope.During the procedure and inside the patient, the stent could not be delivered and became torn.The procedure was completed with another of the same device and there were no patient complications reported.

• Brand Name: POLARIS? LOOP
• Common Device Name: STENT, URETERAL
• Manufacturer (Section D): BOSTON SCIENTIFIC CORPORATION; 300 boston scientific way; marlborough MA 01752
• Manufacturer (Section G): BOSTON SCIENTIFIC CORPORATION; 2546 calle primera; alajuela ; CS
• Manufacturer Contact: farshad fahimi ; 4100 hamline avenue north; building c; saint paul, MN 55112
• MDR Report Key: 21370654
• Report Number: 2124215-2025-07682
• Device Sequence Number: 8564476
• Product Code: FAD
• UDI-Device Identifier: 08714729421016
• UDI-Public: (01)08714729421016(17)260102(10)30775118
• Combination Product (Y/N): N
• Initial Reporter Country: CH
• PMA/510(K) Number: K030503
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Serviced by Third Party (Y/N): Unknown
• Reporter Type: Manufacturer
• Report Source: Other,Foreign,Health Professional,Company Representative
• Initial Reporter Occupation: Physician
• Type of Report: Initial,Followup,Followup
• Report Date (Section B): 05/06/2025

1 Device was Involved in the Event

1 Patient was Involved in the Event

• Is this an Adverse Event Report?: No
• Is this a Product Problem Report?: Yes
• Operator of Device: Health Professional
• Device Expiration Date: 01/02/2026
• Device Model Number: M0061552210
• Device Catalogue Number: M0061552210
• Device Lot Number: 0030775118
• Was Device Available for Evaluation?: Device Returned to Manufacturer
• Is the Reporter a Health Professional?: Yes
• Type of Report(Section G): Thirty-Day
• Initial Date Received by Manufacturer: 01/21/2025
• Supplement Date Received by Manufacturer: 03/17/2025; 04/11/2025
• Initial Report FDA Received Date: 02/12/2025
• Supplement Report FDA Received Date: 04/11/2025; 05/06/2025
• Was Device Evaluated by Manufacturer? (Y/N): Yes
• Date Device Manufactured: 01/03/2023
• Is the Device Labeled for Single Use? (Y/N): Yes
• Is This a Single-Use Device that was Reprocessed and Reused on a Patient? (Y/N): No
• Usage of Device: Initial
• Patient Sequence Number: 1
• Patient Age: 47 YR
• Patient Sex: Male
• Patient Weight: 53 KG