MAUDE Adverse Event Report: MICROVENTION, INC. STENT; FRED-X 27

Model Number	FREDX4520-PMA
Medical Device Problem Code	Activation Problem (4042)
Health Effect - Clinical Code	No Clinical Signs, Symptoms or Conditions (4582)
Date of Event	06/27/2024
Type of Reportable Event	Malfunction
Event or Problem Description
It was reported that the physician reached out after a 6 month follow up in late june regarding a patient he had treated with fred x, and is concerned about what the diagnostic showed in the scan.The physician believes that the device foreshortened proximally between the day of surgery and the 6 month follow up.The patient is showing no symptoms, is dapt compliant, and is healthy otherwise.
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 device remains implanted in the patient and is not available for return; however, customer supplied images were provided to the manufacturer for evaluation, and the investigation is ongoing.Upon completion of the investigation, a supplemental mdr will be submitted.
Additional Manufacturer Narrative
Investigation findings: procedure/medical information review: four radiographic images were provided for review.They are not labeled as to date or time.The images are all in lateral projection and not labeled right or left; it cannot be determined whether these are right or left ica angiograms.Image 1: 3d ica dsa, with contrast, lateral projection.A fred spans from the ica terminus to the ica petrocavernous junction.The proximal inner layer has a funnel, fish mouth v-shape, that corresponds to what is seen on the 6-month follow up dsa on images 2 and 4.Image 2: two images are seen.Both are lateral ica dsas, subtracted, with contrast.The left image seems to be the angiogram obtained immediately after the implantation procedure.It shows a fred in the same position as described above.The contrast is dense, and the inner layer¿s relationship to the outer layer cannot be determined.There is a faintly seen small superior hypophyseal aneurysm.No filling defects.The right image is likely the 6 month follow up.The proximal radiopaque markers have migrated distally approximately 2 mm and are still at the ica petrocavernous junction.The inner layer has a funnel, fish mouth v-shape that shows as a v-shaped fine linear filling defect within the proximal part of the stent, indicating incomplete opening.Image 3: 3d dsa, lateral projection, with contrast.The same findings as described above are seen (fish mouthing of the inner layer).The small superior hypophyseal aneurysm still fills.Image 4: 6 month follow up lateral dsa, lateral projection.The proximal radiopaque markers have migrated distally approximately 2 mm and are still at the ica petrocavernous junction.The inner layer has a funnel, fish mouth v-shape that shows as a v-shaped fine linear filling defect within the proximal part of the stent, indicating incomplete opening.There is faint filling of the small superior hypophyseal aneurysm.These images do not explain why there is fish mouthing of the proximal inner layer and slight proximal foreshortening of the fred.Items returned: n/a.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.Investigation findings: without the return and physical evaluation of the device, the investigation cannot further examine if a condition existed that would have contributed to the reported event.Based on a review of the device¿s risk documentation, the reported event did not indicate there were the presence of any potential or new manufacturing, design, quality, or other systemic issues, or non-conformance's.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-conformance's 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.Below is a list of the probable adverse effects (e.G., complications) associated with the use of neurovascular flow diverting stents.Allergic reaction, including but not limited to: contrast dye, nitinol metal, and any other medications used during the procedure, amaurosis fugax or transient blindness, aphasia, blindness, cardiac arrhythmia.Complications of arterial puncture including pain, local bleeding, or injury to the artery, or adjacent nerves, cranial neuropathy, death, device fracture, migration or misplacement, diplopia, dissection or perforation of the parent artery, headache, hemiplegia, hemorrhage, including intracranial hemorrhage (ich), subarachnoid hemorrhage (sah), and retroperitoneal, hydrocephalus, infection, mass effect, myocardial infarction, neurological deficits, pseudoaneurysm formation, reactions to anti-platelet or anti-coagulant agents, reactions due to radiation exposure, including alopecia, burns ranging in severity from skin reddening to ulcers, cataracts, and delayed neoplasia.Reactions to anesthesia and related procedures, reactions to contrast agents including allergic reactions and kidney failure, reduced visual acuity or visual field, retinal artery occlusion or infarction, retinal ischemia, rupture or perforation of the aneurysm, stenosis of stented segment, seizure, stent thrombosis, stroke or tia (transient ischemic attack), thromboembolic event, vasospasm, visual impairment.Warnings: the fred-27 system should only be delivered through a headway 27 microcatheter and the fred-21 system should only be delivered through a headway 21 microcatheter.If repeated friction is encountered during fred system delivery, verify microcatheter is not kinked or in extremely tortuous anatomy.Confirm that the microcatheter does not ovalize.Confirm that there is adequate sterile heparinized flush solution.Do not reposition the fred system in the parent vessel without fully retrieving the device.The fred system must be retrieved/re-sheathed into the microcatheter and re-deployed at the desired target location or removed completely from the patient.The fred system must not be re-deployed more than three times.Should unusual resistance be felt at any time during access or removal, the introducer/guide catheter/microcatheter and fred system should be removed as a single unit.Applying excessive force during delivery or retrieval of the fred system can potentially result in loss or damage to the device and delivery components.The fred system delivery wire should not be utilized as a guidewire.Do not torque the fred system.A torque device should not be used.Directions for use 17.Advance the delivery wire to transfer the fred system from within the introducer into the microcatheter.18.Warning: do not torque the delivery wire while advancing or retracting the fred system.21.Warning: do not apply undue force.If resistance is encountered at any point during delivery or manipulation, withdraw the unit and select a new fred system.23.Position the fred system for deployment by aligning the fred system implant distal radiopaque end markers past the aneurysm neck, allowing for adequate distal and proximal device landing zones as shown in the following figures for fred-27 system and fred-21 system.26.Note: a slow, proper push/pull technique, encompassing sufficient delivery wire push force, in addition to an opposing microcatheter withdrawal force, to remove excess microcatheter slack while maintaining the microcatheter tip within the center of the parent vessel, will facilitate properly deploying the fred system at the proper location, to achieve full expansion and good vessel apposition.27.Caution: using a rapid microcatheter withdrawal technique to deploy the fred system is not recommended and may result in device elongation or improper deployment.Be aware of delivery wire tip position during deployment.28.If the fred system positioning is not satisfactory, the implant may be recaptured and repositioned if it is not fully deployed.The implant may be recaptured until the point where the distal-most wire marker, collocated distal to the implant proximal markers, is aligned approximately 50% of length proximal to the microcatheter distal marker band.29.Caution: if resistance is felt while recapturing the device, do not continue to recapture.Withdraw the microcatheter slightly to un-sheath the device (without exceeding the recapture limit), and then attempt to recapture again.30.Caution: the fred system must not be re-deployed more than three times.31.If fred system positioning is satisfactory, carefully advance the delivery wire while retracting the microcatheter as needed to minimize slack, maintaining the microcatheter around the center of the parent vessel, to allow the implant to deploy across the neck of the aneurysm.Ensure the implant proximal radiopaque end markers are in the advised position (see step 23) proximal to the aneurysm neck for adequate coverage.32.Note: the fred system will expand and may foreshorten up to 60% from its undeployed length.Visually verify opening of the proximal end, ensuring that the microcatheter distal tip marker is pulled back, adequately away from the implant proximal end, to allow the proximal end to freely open.Push forward on the delivery wire to assist in maintaining access within the implant as needed.33.Note: visualize and refer to implant radiopaque end markers to maintain adequate implant length on each side of the aneurysm neck/target location to ensure appropriate coverage.34.Warning: do not fully deploy the fred system if positioning in the parent vessel is not satisfactory.37.Carefully inspect the deployed fred implant under fluoroscopy to confirm that it is completely open and opposed to the vessel wall and not kinked.If the implant is not fully open and apposed or is kinked, consider utilizing a suitable micro guidewire and/or occlusion balloon catheter to fully open the implant.38.Caution: carefully watch the fred implant distal and proximal markers when passing through the implanted device with other devices to avoid displacing the implant.Investigation conclusion: four radiographic images were provided for review.They are not labeled as to date or time.Review of the images is as follows: the images are all in lateral projection and not labeled right or left; it cannot be determined whether these are right or left ica angiograms.Image 1: 3d ica dsa, with contrast, lateral projection.A fred spans from the ica terminus to the ica petrocavernous junction.The proximal inner layer has a funnel, fish mouth v-shape, that corresponds to what is seen on the 6-month follow up dsa on images 2 and 4.Image 2: two images are seen.Both are lateral ica dsas, subtracted, with contrast.The left image seems to be the angiogram obtained immediately after the implantation procedure.It shows a fred in the same position as described above.The contrast is dense, and the inner layer¿s relationship to the outer layer cannot be determined.There is a faintly seen small superior hypophyseal aneurysm.No filling defects.The right image is likely the 6 month follow up.The proximal radiopaque markers have migrated distally approximately 2mm and are still at the ica petrocavernous junction.The inner layer has a funnel, fish mouth v-shape that shows as a v-shaped fine linear filling defect within the proximal part of the stent, indicating incomplete opening.Image 3: 3d dsa, lateral projection, with contrast.The same findings as described above are seen (fish mouthing of the inner layer).The small superior hypophyseal aneurysm still fills.Image 4: 6 month follow up lateral dsa, lateral projection.The proximal radiopaque markers have migrated distally approximately 2mm and are still at the ica petrocavernous junction.The inner layer has a funnel, fish mouth v-shape that shows as a v-shaped fine linear filling defect within the proximal part of the stent, indicating incomplete opening.There is faint filling of the small superior hypophyseal aneurysm.These images do not explain why there is fish mouthing of the proximal inner layer and slight proximal foreshortening of the fred.Without the return and physical evaluation of the device, the investigation cannot further examine if a condition existed that would have contributed to the reported event.
Event or Problem Description
Please see section h11 for investigation results of customer provided images.

• Brand Name: STENT
• Common Device Name: FRED-X 27
• 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: 20297545
• Report Number: 2032493-2024-00706
• Device Sequence Number: 7744837
• Product Code: OUT
• UDI-Device Identifier: 00842429114407
• UDI-Public: (01)00842429114407(11)230315(17)260228(10)0000335594
• Combination Product (Y/N): N
• Initial Reporter State: GA
• Initial Reporter Country: US
• PMA/510(K) Number: P180027
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• 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): 12/05/2024

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: 02/28/2026
• Device Model Number: FREDX4520-PMA
• Device Lot Number: 0000335594
• 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: 08/29/2024
• Supplement Date Received by Manufacturer: 11/26/2024
• Initial Report FDA Received Date: 09/24/2024
• Supplement Report FDA Received Date: 12/06/2024
• Was Device Evaluated by Manufacturer? (Y/N): No
• Date Device Manufactured: 03/15/2023
• 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: Female