MAUDE Adverse Event Report: MICRO THERAPEUTICS, INC. DBA EV3 PIPELINE FLEX W/SHIELD TECHNOLOGY; INTRACRANIAL ANEURYSM FLOW DIVERTER

Model Number	PED2-450-30
Medical Device Problem Codes	Material Deformation (2976); Material Twisted/Bent (2981); Activation Failure (3270); Physical Resistance/Sticking (4012)
Health Effect - Clinical Code	No Clinical Signs, Symptoms or Conditions (4582)
Date of Event	11/28/2025
Type of Reportable Event	Malfunction
Additional Manufacturer Narrative
Continuation of d10: phenom 27 microcatheter product id: fg15150-0615-1s (lot: 230755171).Medtronic submits this report to comply with fda regulations 21 cfr parts 4 and 803.Medtronic has made reasonable efforts to provide as much relevant information as is available to the company as of the submission date of this report.This report does not constitute an admission or a conclusion by fda, medtronic, or its employees that the device, medtronic, or its employee caused or contributed to the event described in the report.Any required fields that are unpopulated are blank because the information is currently unknown or unavailable.Medtronic will submit a supplemental report if additional relevant information becomes known.
Event or Problem Description
Medtronic received a report that after establishing access, the pipeline flex with shield technology stent was delivered to the ipsilateral m1 segment.After exposing approximately 7¿8 mm of the stent tip and waiting for about 10 seconds, the tip failed to open.The stent was deployed an additional 12 mm, but the tip still did not open.Attempts were made to retrieve and redeploy the stent, and various maneuvers such as shaking and push-pull techniques were also attempted, however, the stent tip remained unopened.Adjustments to the microcatheter tension were also ineffective.The stent was withdrawn from the body, and it was found that the stent tip was entangled.The stent and microcatheter were replaced with medtronic products to complete the procedure.No patient symptoms or complications were associated with this event.The patient was undergoing dense mesh flow diversion surgery for treatment of an unruptured, saccular, aneurysm of the left carotid artery with a max diameter of 5 mm and a 4 mm neck diameter.The landing zone arterial diameter was 4 mm distally and 4.4 mm proximally.It was noted the patient's vessel tortuosity was moderate.Femoral artery access vessel diameter was 6 mm.Dual antiplatelet treatment (dapt) was administered.The angiographic result post procedure reported aneurysm.The reported device and any accessory devices were prepared, and the catheter was flushed, as indicated in the instructions for use (ifu).The pipeline was used for an approved indication (on-label).Ancillary devices included a phenom 27 microcatheter.
Additional Manufacturer Narrative
Medtronic submits this report to comply with fda regulations 21 cfr parts 4 and 803.Medtronic has made reasonable efforts to provide as much relevant information as is available to the company as of the submission date of this report.This report does not constitute an admission or a conclusion by fda, medtronic, or its employees that the device, medtronic, or its employee caused or contributed to the event described in the report.Any required fields that are unpopulated are blank because the information is currently unknown or unavailable.Medtronic will submit a supplemental report if additional relevant information becomes known.
Event or Problem Description
Additional information was received stating that "the stent tip was entangled" means the braided layer was wrapped and the tip could not be opened.The cause of both the failure to open and the entanglement was not determined.There was friction during the delivery of the pipeline, but no specific section of the catheter was identified as having resistance.A continuous saline flush was administered and maintained as indicated in the ifu.No damage was observed to the pipeline pushwire or catheter.The pipeline had not been placed in a vessel bend when it failed to open, and no other devices were attempted to open it.The pipeline was resheathed two times during the procedure.
Additional Manufacturer Narrative
H3 product analysis: as found condition: the pipeline flex embolization device and phenom 27 catheter were returned for analysis within shipping box; and within a plastic bio-pouch.The pipeline flex pushwire was returned outside the phenom 27 catheter.However, the pipeline flex braid was tuck within the catheter.Damage location details: no bent or kink was found with pushwire.The distal hypotube was found to be stretched.The shrink tubing was found intact but pulled back from the proximal bumper.The distal and proximal dps restraints were found to be intact.The dps sleeves were found intact with no signs of damage.No defects were found with the tip coil, distal marker, re-sheathing marker, pads or with the proximal bumper.The distal and proximal ends of pipeline flex braid were found to be fully opened and damaged.No flash or voids molded were observed in the hub.The catheter body was found to be kinked at ~14.7cm from proximal end.In addition, the catheter body was found to be kinked at ~20.8cm from distal end.The catheter tip, marker band were examined; and no damage was found.No other anomalies were observed.Testing/analysis: the total and usable lengths of the catheter were measured to be within specifications.For further examination, the catheter was cut to remove the braid from the catheter lumen.The catheter was flushed with water and water exited out of the distal tip.The catheter was then tested by running an in-house 0.0265¿ mandrel through catheter tip and hub.The mandrel successfully passed through the catheter hub and tip with no issues; however, the resistance observed at the damaged locations.Conclusion: based on the analysis findings, the pipeline flex and phenom 27 catheter were confirmed to have resistance during delivery and retrieval as the braid was stuck inside the catheter.In addition, the pushwire and phenom 27 catheter were found to be damaged.From the damages seen on the hypotube (stretching); braid (frying); and catheter (kinking); it appears there was high force used.It is likely these damages occurred when the customer attempted to advance and retrieve the pipeline flex through the phenom 27 catheter against resistance.Possible causes include damaged catheter, burrs, bumps, kinks or other damage on ped or pushwire, frayed ends on braid, patient vessel tortuosity, user does not maintain continuous flush, and users pulls back on/torques wire while advancing ped in microcatheter.The vessel tortuosity was moderate and the catheter was continually flushed with heparanized saline as indicated in the ifu.Which eliminates these factors out as potential causes.However, the root cause could not be determined.Medtronic submits this report to comply with fda regulations 21 cfr parts 4 and 803.Medtronic has made reasonable efforts to provide as much relevant information as is available to the company as of the submission date of this report.This report does not constitute an admission or a conclusion by fda, medtronic, or its employees that the device, medtronic, or its employee caused or contributed to the event described in the report.Any required fields that are unpopulated are blank because the information is currently unknown or unavailable.Medtronic will submit a supplemental report if additional relevant information becomes known.

• Brand Name: PIPELINE FLEX W/SHIELD TECHNOLOGY
• Common Device Name: INTRACRANIAL ANEURYSM FLOW DIVERTER
• Manufacturer (Section D): MICRO THERAPEUTICS, INC. DBA EV3; 9775 toledo way; irvine CA 92618
• Manufacturer (Section G): MICRO THERAPEUTICS, INC. DBA EV3; 9775 toledo way; irvine CA 92618
• Manufacturer Contact: justin ellis ; 9775 toledo way; irvine, CA 92618 ; 7635265677
• MDR Report Key: 23686930
• Report Number: 2029214-2025-02518
• Device Sequence Number: 9429107
• Product Code: OUT
• UDI-Device Identifier: 00763000284565
• UDI-Public: (01)00763000284565(17)270610(10)B743886
• Combination Product (Y/N): N
• Initial Reporter Country: CH
• PMA/510(K) Number: P100018
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Device Implanted Year: 2025
• Device Explanted Year: 2025
• Serviced by Third Party (Y/N): N
• Reporter Type: Manufacturer
• Report Source: Foreign,Health Professional,Company Representative
• Initial Reporter Occupation: Physician
• Type of Report: Initial,Followup,Followup
• Report Date (Section B): 02/23/2026

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 Model Number: PED2-450-30
• Device Catalogue Number: PED2-450-30
• Device Lot Number: B743886
• 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: 11/28/2025
• Supplement Date Received by Manufacturer: 12/15/2025; 02/17/2026
• Initial Report FDA Received Date: 12/01/2025
• Supplement Report FDA Received Date: 01/13/2026; 02/23/2026
• Was Device Evaluated by Manufacturer? (Y/N): Yes
• Date Device Manufactured: 06/10/2024
• 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
• Concomitant Medical Products and Therapy/Usage Dates: SEE H11.
• Patient Age: 64 YR
• Patient Sex: Female