MAUDE Adverse Event Report: MICROVENTION INC. WEB SL; INTRASACCULAR FLOW DISRUPTION DEVICE

Model Number	W5-4.5-2-MVI-3
Medical Device Problem Code	Separation Problem (4043)
Health Effect - Clinical Code	No Clinical Signs, Symptoms or Conditions (4582)
Date of Event	12/13/2023
Type of Reportable Event	Malfunction
Additional Manufacturer Narrative
A search for non-conformances associated with this part/lot number combination did not reveal any production-related issues relevant to the complaint that occurred during manufacturing of the device.The investigation of the returned web system found the implant separated from the delivery system, and the heater coil windings stretched.The device passed continuity and resistance testing.Furthermore, the heater coil pet and implant tether were found melted, indicating that the device was activated using a detachment controller during the procedure; therefore, the damage to the heater coil windings likely occurred post-activation.However, the stretched heater coil windings are an indication that the tether could have been caught in between the coil windings and caused the heater coil to stretch when the delivery system was pulled/retracted during the procedure, which is consistent with the device not detaching as described in the reported event.The returned detachment controllers were found to function as intended and would not have caused or contributed to the reported event.Potential complications as referenced on the ifu, include but are not limited to the following: hematoma at the site of entry, aneurysm rupture, emboli, vessel perforation, parent artery occlusion, hemorrhage, ischemia, vasospasm, clot formation, device migration or misplacement, premature or difficult device detachment, non-detachment, incomplete aneurysm filling, revascularization, post-embolization syndrome, and neurological deficits including stroke and death.
Event or Problem Description
It was reported that during a web embolization procedure to treat an mca bifurcation aneurysm, the web displayed a green light, and it did not detach.All troubleshooting protocols were attempted, but the web still would not detach.The web was re-sheathed and removed, and a stent coil embolization was performed to complete the procedure.There was no patient injury reported.

• Brand Name: WEB SL
• Common Device Name: INTRASACCULAR FLOW DISRUPTION DEVICE
• Manufacturer (Section D): MICROVENTION INC.; 35 enterprise; aliso viejo CA 92656
• Manufacturer Contact: terrence callahan ; 35 enterprise; aliso viejo, CA 92656 ; 7142478000
• MDR Report Key: 18984027
• Report Number: 2032493-2024-00247
• Device Sequence Number: 18244134
• Product Code: OPR
• UDI-Device Identifier: 00842429110799
• UDI-Public: (01)00842429110799(11)220607(17)250531(10)0000202703
• Combination Product (Y/N): N
• Initial Reporter State: SC
• Initial Reporter Country: US
• PMA/510(K) Number: P170032
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Serviced by Third Party (Y/N): N
• Reporter Type: Manufacturer
• Report Source: Health Professional,User Facility,Company Representative
• Initial Reporter Occupation: Physician
• Type of Report: Initial
• Report Date (Section B): 03/26/2024

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: 05/31/2025
• Device Model Number: W5-4.5-2-MVI-3
• Device Lot Number: 0000202703
• Was Device Available for Evaluation?: Device Returned to Manufacturer
• Date Returned to Manufacturer: 01/17/2024
• Is the Reporter a Health Professional?: Yes
• Was the Report Sent to FDA?: No
• Type of Report(Section G): Thirty-Day
• Initial Date Received by Manufacturer: 03/08/2024
• Initial Report FDA Received Date: 03/26/2024
• Was Device Evaluated by Manufacturer? (Y/N): Yes
• Date Device Manufactured: 06/07/2022
• 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 Sex: Unknown