MAUDE Adverse Event Report: MICROVENTION, INC. WEB SL; INTRASACCULAR DEVICES

Model Number W5-4-2-MVI-3

Device Problem Off-Label Use (1494)

Patient Problem Ruptured Aneurysm (4436)

Event Date 11/30/2023

Event Type  Injury  

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 device was implanted in the patient and not returned to the manufacturer for evaluation.Procedural or medical imaging was not provided.If imaging or additional information is received at a later date, an investigation will be performed and a supplemental mdr will be submitted.

Event Description

It was reported that a potential re-rupture of a pica aneurysm where web had been placed 8 days prior.The patient was brought to angio suite for full angiography to visualize web device and also rule out a different rupture point.No other rupture point was found, but it should be noted that the web device was not compressed and blushing was not present outside of the aneurysm.Angiography did not definitively show a re-rupture of the pica aneurysm, however, the doctor concluded that it was the most likely rupture location and successfully placed a flow diverter in the vertebral artery to divert flow away from the pica.Microvention clinical specialist, was at (b)(6) center, 8 days prior, to support a portal approved web case, which ended up getting cancelled.A ruptured aneurysm came into the hospital.The doctor requested web to treat.The mv specialist informed the doctor that this would be an off-label use of the product.She felt that it was the best treatment option for the patient at that time and decided to move forward.4x2 web was successfully placed in aneurysm that measured 3.3mm wide and 2.5mm height.A straight via17 microcatheter was used along with a 6f125cm sofia for distal access support.Angiographic results post deployment showed successful placement and stagnation in the web.Additional information received indicated, "web is indicated for use at the middle cerebral artery (mca) bifurcation, internal carotid artery (ica) terminus, anterior communicating artery (acomm) complex, or basilar artery apex for the endovascular treatment of adult patients with saccular, wide neck bifurcation intracranial aneurysms with dome diameter from 3 mm to 10 mm and either neck size 4 mm or greater or the dome-to-neck ratio is greater than 1 and less than 2.The aneurysm location for this patient was pica, which was off label, and phil made sure to let the doctor know this information.The patient is in stable condition and doing well, according to the doctor.

Event Description

No additional information was received.Please see h6 and h10.

Manufacturer Narrative

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 and 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: there are no similar complaints based on the complaint category regarding this batch number from the last two years recorded in the complaint system at the time of this investigation.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.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
• Type of Device: INTRASACCULAR DEVICES
• Manufacturer (Section D): MICROVENTION, INC.; 35 enterprise drive; aliso viejo CA 92656
• Manufacturer Contact: terrence callahan ; 35 enterprise drive; aliso viejo, CA 92656 ; 7142478000
• MDR Report Key: 18361386
• MDR Text Key: 330931235
• Report Number: 2032493-2023-01133
• Device Sequence Number: 1
• Product Code: OPR
• UDI-Device Identifier: 00842429110812
• UDI-Public: (01)00842429110812(11)230725(17)260630(10)0000388654
• Combination Product (y/n): N
• Reporter Country Code: US
• PMA/PMN Number: P170023
• Number of Events Reported: 1
• Summary Report (Y/N): N
• Report Source: Manufacturer
• Source Type: Health Professional,User Facility,Company Representative
• Reporter Occupation: Physician
• Type of Report: Initial,Followup
• Report Date: 01/29/2024

1 Device was Involved in the Event

1 Patient was Involved in the Event

• Date FDA Received: 12/19/2023
• Is this an Adverse Event Report?: Yes
• Is this a Product Problem Report?: No
• Device Operator: Health Professional
• Device Model Number: W5-4-2-MVI-3
• Device Lot Number: 0000388654
• Is the Reporter a Health Professional?: Yes
• Was the Report Sent to FDA?: No
• Date Manufacturer Received: 01/08/2024
• Was Device Evaluated by Manufacturer?: Device Not Returned to Manufacturer
• Date Device Manufactured: 07/25/2023
• Is the Device Single Use?: Yes
• Type of Device Usage: Initial
• Patient Sequence Number: 1
• Patient Outcome(s): Other
• Patient Sex: Male