MAUDE Adverse Event Report: MICROVENTION WEB SL; WEB ANEURYSM EMBOLIZATION SYSTEM

Model Number	UNKNOWN
Medical Device Problem Code	Device Dislodged or Dislocated (2923)
Health Effect - Clinical Code	Aneurysm (1708)
Date of Event	05/07/2024
Type of Reportable Event	Serious Injury
Event or Problem Description
It was reported during treatment for a posterior communicating artery (pcom) aneurysm with a web sl was used.After the web detachment a repeat contrast injection was performed, which showed some movement of the web inside the aneurysm.A demagnified ap and lateral view of the intracranial circulation was performed to assess for thromboemboli and to view the orientation of the web device inside the aneurysm.The size of the aneurysm was 5.16 avg width and 3.14 minimum height.The web was 6x2 and oversized.Lateral compression of 4.98 on ap view and 5.24 on lateral view.Entry angle of aneurysm was 45 degree.The run showed no thromboemboli but the web device did rotated significantly inside the aneurysm after detachment.A magnified ap and lateral view of the web was performed in order to assess the degree of web rotation inside the aneurysm.The run showed that during detachment the web device had indeed rotated inside the aneurysm markedly, so that it was not placed inside the aneurysm sac and there was a significant endoleak around it and there was also a small adjacent lateral paraclinoid ica aneurysm.Both of the posterior communicating artery and lateral paraclinoid ica aneurysm were treated.The web was left implanted.A pipeline was used to complete the procedure.The patient is good and there was no adverse events.
Additional Manufacturer Narrative
A search for non-conformance's associated with the reported part/lot number combination did not reveal any production-related issues relevant to the complaint that occurred during manufacturing of the device.The device was implanted in the patient and not returned to the manufacturer for evaluation.Procedural or medical imaging was not provided.The reported product issue could not be confirmed.If additional information is received at a later date, a supplemental mdr will be submitted.
Additional Manufacturer Narrative
Corrected data: (d2a) common device name: changed from intrasaccular devices to web aneurysm embolization system.Visual analysis: a visual inspection of the device captured in this file could not be performed as a physical device was not returned for evaluation, nor were any images of the device provided in place of a device return.Procedure and medical imaging was not provided for this investigation.Investigation findings: without the return and physical evaluation of the device, the investigation cannot definitively determine if a condition existed that would have caused or contributed to the reported event.Without imaging, the investigation cannot verify the event occurred as described, nor could the investigation definitively determine the cause of the reported event.Based on a review of the device's risk documentation, the reported event did not indicate there were any potential or new manufacturing, design, quality, or other systemic issues, or non-conformances.The complaint code is monitored through the trending process; corrective action is determined, as needed, through this process.Investigations of historic complaint files with similar complaint category coding are recorded in the complaint handling system; without the ability to perform an analysis of the device, this investigation cannot identify with certainty any potential root causes.Batch review: 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.Complaint system review: based on a review of the last 2 years of complaint data, and at the time of this investigation, no systemic issues have been identified for this batch number that would have caused or contributed to the reported event.Ifu review (additional information can be found in the ifu): potential complications: potential complications include but are not limited to the following: vessel puncture site hematoma, aneurysm perforation or rupture, hemorrhage, edema, thromboemboli, transient ischemic attack, ischemic stroke, neurologic deficits, parent artery occlusion, ischemia, vessel dissection or perforation, vascular thrombosis, vasospasm, device migration or misplacement, premature detachment, headache, post-embolization syndrome, infection and death.Warnings: · advance and retract the web embolization device slowly.Do not advance the delivery device with excessive force.Determine the cause of any unusual resistance.Remove the web embolization device if excessive friction is noted and check for damage.· do not rotate the delivery device during or after delivery of the web embolization device.Rotating the web embolization device may result in damage or premature detachment.· the web embolization device cannot be detached with any other power source other than a web detachment control device.Ensure that at least two web detachment control devices are available before initiating an embolization.Procedure - instructions for use: detachment of the web embolization device: 34.The detachment control device is pre-loaded with batteries and will activate when the delivery device is properly connected.35.Verify that the rhv is firmly locked around the delivery device before attaching the detachment control device to ensure that the web embolization device does not move during the connection process.36.Ensure that the delivery device gold connectors are clean and free from blood or contrast.If necessary, wipe the connectors with sterile water and dry before connecting.37.Insert the proximal end of the delivery device into the detachment control device.When the delivery device is properly connected, the light will flash green and an intermittent tone will be heard.38.Verify the web embolization device position before pressing the detachment button.39.Push the detachment button.During firing, the light should be solid green and the beep should be continuous.40.Verify detachment by first loosening the rhv valve, then pulling back slowly on the delivery device and verifying that there is not web embolization device movement.If the web embolization device does not detach, push the detachment button again.If the web embolization device is still not detached, obtain a new detachment control device and attempt detachment up to two additional times.If it does not detach, remove the delivery device.41.Verify the position of the web embolization device angiographically through the guide catheter.42.Prior to removing the microcatheter from the treatment site, place an appropriately sized guidewire completely through the microcatheter lumen to ensure that no part of the web embolization device remains within the microcatheter.Investigation conclusion: the physical device was not available for evaluation to determine if a condition existed that would have caused or contributed to event.Supplemental imaging was also unavailable for review; without imaging, the investigation cannot verify the event occurred as described, nor could the investigation definitively determine the cause of the reported event.This information may be updated if additional information is provided at a later date.

• Brand Name: WEB SL
• Common Device Name: WEB ANEURYSM EMBOLIZATION SYSTEM
• Manufacturer (Section D): MICROVENTION; 35 enterprise; aliso viejo CA 92656
• Manufacturer Contact: terrence callahan ; 35 enterprise; aliso viejo, CA 92656 ; 7142478000
• MDR Report Key: 19516940
• Report Number: 2032493-2024-00461
• Device Sequence Number: 8413107
• Product Code: OPR
• UDI-Device Identifier: 00842429117996
• UDI-Public: (01)00842429117996(11)240220(17)270131(10)0000516870
• Combination Product (Y/N): N
• Initial Reporter State: MN
• Initial Reporter Country: US
• PMA/510(K) Number: P170032
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Device Implanted Year: 2024
• Serviced by Third Party (Y/N): Unknown
• Reporter Type: Manufacturer
• Report Source: Health Professional,User Facility,Company Representative
• Initial Reporter Occupation: Physician
• Type of Report: Initial,Followup
• Report Date (Section B): 07/15/2024

1 Device was Involved in the Event

1 Patient was Involved in the Event

• Is this an Adverse Event Report?: Yes
• Is this a Product Problem Report?: Yes
• Operator of Device: Health Professional
• Device Model Number: UNKNOWN
• Device Lot Number: 0000516870
• Was Device Available for Evaluation?: No
• 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: 05/17/2024
• Supplement Date Received by Manufacturer: 06/18/2024
• Initial Report FDA Received Date: 06/12/2024
• Supplement Report FDA Received Date: 07/15/2024
• Was Device Evaluated by Manufacturer? (Y/N): No
• Date Device Manufactured: 02/20/2024
• 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
• Outcome Attributed to Adverse Event: Required Intervention
• Patient Age: 71 YR
• Patient Sex: Female