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

Model Number MV-WB050321

Device Problem Device Dislodged or Dislocated (2923)

Patient Problems Ischemia Stroke (4418); Thrombosis/Thrombus (4440)

Event Date 09/10/2023

Event Type  Injury  

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.Ifu review (additional information can be found in the ifu): please refer to the japanese ifu for precautions, warnings, and further information.The following is taken from the english version: potential complications: potential complications 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.Warnings and precautions: the web aneurysm embolization system is intended for single use only.The detachment control device is intended to be used for one patient.Do not resterilize and/or reuse the device.Reuse and/or resterilization can increase risk of infection, cause a pyrogenic response or other life threatening complications.Reuse and/or resterilization can degrade product performance, leading to device malfunction.Dispose of all devices in accordance with applicable hospital, administrative and/or local government policy.Advance and retract the device slowly.Do not advance the delivery device with excessive force.Determine the cause of any unusual resistance.Remove the device if excessive friction is noted and check for damage.Do not rotate the delivery device during or after delivery of the embolization device.Rotating the device may result in damage or premature detachment.The embolization device cannot be detached with any other power source other than a microvention inc.Detachment control device.Ensure that at least two detachment control devices are available before initiating an embolization procedure.Procedure detachment of the device: the detachment control device is pre-loaded with batteries and will activate when the delivery device is properly connected.Verify that the rhv is firmly locked around the delivery device before attaching the detachment control device to ensure that the embolization device does not move during the connection process.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.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.Verify the embolization device position before pressing the detachment button.Push the detachment button.During firing, the light should be solid green and the beep should be continuous.Verify detachment by first loosening the rhv valve, then pulling back slowly on the delivery device and verifying that there is not embolization device movement.If the embolization device does not detach, push the detachment button again.If the 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.Verify the position of the embolization device angiographically through the guide catheter.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 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.

Event Description

It was reported that the patient had the web device implanted on (b)(6) 2023 and was discharged from the hospital next day.On (b)(6) 2023, the patient was taken to the hospital for a cerebral infarction.The implanted web had dropped from the aneurysm into the ic and formed a thrombus, which resulted in cerebral infarction.The web was returned into the aneurysm using an aspiration catheter by being attached to its tip under aspiration pressure, and then pta was performed using a balloon catheter.A moved thrombus was able to be removed with the aspiration catheter and further treatment was planned to add a stent, as the aneurysm has a wide neck.A stent was implanted on (b)(6) 2023.The distal flare of the stent was displaced from the position where it was to be placed, which caused a slight blood flow into the aneurysm.A competitor¿s microcatheter was therefore delivered into a space at the back of the web, and three coils were implanted.The procedure was successfully completed.As on (b)(6) 2023, the patient was conscious, not paralyzed, and had a headache and visual field loss.The patient will begin rehabilitation in a few days and return to normal life.

• 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: 17822675
• MDR Text Key: 324321765
• Report Number: 2032493-2023-00962
• Device Sequence Number: 1
• Product Code: OPR
• UDI-Device Identifier: 04987892122309
• UDI-Public: (01)04987892122309(11)220311(17)270228(10)0000165374
• Combination Product (y/n): N
• Reporter Country Code: JA
• PMA/PMN Number: P170032
• Number of Events Reported: 1
• Summary Report (Y/N): N
• Report Source: Manufacturer
• Source Type: Foreign,Health Professional,User Facility
• Reporter Occupation: Physician
• Type of Report: Initial
• Report Date: 09/11/2023

1 Device was Involved in the Event

1 Patient was Involved in the Event

• Date FDA Received: 09/27/2023
• Is this an Adverse Event Report?: Yes
• Is this a Product Problem Report?: Yes
• Device Operator: Health Professional
• Device Model Number: MV-WB050321
• Device Lot Number: 0000165374
• Was Device Available for Evaluation?: No
• Is the Reporter a Health Professional?: Yes
• Was the Report Sent to FDA?: No
• Date Manufacturer Received: 09/11/2023
• Was Device Evaluated by Manufacturer?: Device Not Returned to Manufacturer
• Date Device Manufactured: 03/11/2022
• Is the Device Single Use?: Yes
• Is This a Reprocessed and Reused Single-Use Device?: No
• Type of Device Usage: Initial
• Patient Sequence Number: 1
• Patient Outcome(s): Required Intervention
• Patient Sex: Female