MAUDE Adverse Event Report: MICROVENTION, INC. FRED 21; FLOW DIVERTER

Model Number FRED2508-PMA

Device Problems Collapse (1099); Migration (4003)

Patient Problems Paralysis (1997); Ischemia Stroke (4418); Thrombosis/Thrombus (4440)

Event Date 06/21/2021

Event Type  Injury  

Manufacturer Narrative

A search for non-conformances 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 remains impanted in the patient.Provided fluoroscopic images show the stent deployed as intended.Multiple images also show the device having migrated distally with part of the proximal end of the stent appearing to protrude into the body of the aneurysm.Additionally, the stent appears compressed in its mid section as reported in the complaint.The images confirm the complaint, but without the return and physical evaluation of the device, the investigation is unable to determine if a condition existed that would have caused or contributed to the reported event.The instructions for use (ifu) identifies device migration or misplacement, stent thrombosis, and ischemic stroke as potential complications associated with use of the device.

Event Description

It was reported that the fred 21 stent was used to treat a right mca (m1) aneurysm.The device was fully deployed into m1 fully covering the aneurysm with proximal flared ends into ica bifurcation.On subsequent run, it was noticed that the device had jumped distally and was no longer covering the aneurysm with proximal flared-end jumping into aneurysm.Clot formed in the center of the stent.Ia integrilin was administered, but did not seem to help.Physician tried to cross the stent to place another device within the first fred 21 but could not re-access the lumen possibly due to some sort of bunching in the center of the stent.Subsequent imaging showed abnormal appearances of the fred 21 device.Procedure was stopped and integrilin drip was started.Additional information received upon follow-up indicated the stent appeared collapsed at 5.4mm and clotted again.The patient had a stroke and is paralyzed on their left side.

Manufacturer Narrative

Additional information: h6.H10: additional evaluation summary: based on bench-testing using vessel models and stent of similar sizes, the stent migration could have been a combination of insufficient oversizing of the stent, the effect of a bolus contrast that momentarily increased the diameter of the treated vessel, and lack of sufficient overlap at the proximal end of the stent that led to less than optimal radial force required for proper anchoring of the stent.

• Brand Name: FRED 21
• Type of Device: FLOW DIVERTER
• Manufacturer (Section D): MICROVENTION, INC.; 35 enterprise; aliso viejo CA 92656
• MDR Report Key: 12200471
• MDR Text Key: 264489809
• Report Number: 2032493-2021-00288
• Device Sequence Number: 1
• Product Code: OUT
• UDI-Device Identifier: 00842429106570
• UDI-Public: (01)00842429106570(11)200527(17)230430(10)20052755J
• Combination Product (y/n): N
• PMA/PMN Number: P180027
• Number of Events Reported: 1
• Summary Report (Y/N): N
• Report Source: Manufacturer
• Source Type: company representative,health
• Type of Report: Initial,Followup
• Report Date: 06/21/2021

1 Device was Involved in the Event

1 Patient was Involved in the Event

• Date FDA Received: 07/20/2021
• Is this an Adverse Event Report?: Yes
• Is this a Product Problem Report?: Yes
• Device Operator: Health Professional
• Device Expiration Date: 04/30/2023
• Device Model Number: FRED2508-PMA
• Device Lot Number: 20052755J
• Was Device Available for Evaluation?: No
• Date Manufacturer Received: 10/11/2021
• Is This a Reprocessed and Reused Single-Use Device?: No
• Patient Sequence Number: 1
• Patient Outcome(s): Required Intervention; Disability
• Patient Age: 32 YR