MAUDE Adverse Event Report: MEDOS INTERNATIONAL SARL CERENOVUS ENTERPRISE; INTRACRANIAL NEUROVASCULAR STENT

Catalog Number	ENCR403912
Medical Device Problem Codes	Premature Activation (1484); Failure to Advance (2524)
Health Effect - Clinical Code	No Clinical Signs, Symptoms or Conditions (4582)
Date of Event	07/10/2025
Type of Reportable Event	Malfunction
Event or Problem Description
A healthcare professional reported that during endovascular embolization, the delivery wire of an enterprise2 4mmx39mm vascular reconstruction device (encr403912, 9320828) passed through microcatheter tip, but the stent body was impeded in microcatheter tip and could not pass through the microcatheter.The doctor only retracted the stent alone but the stent was found detached from the delivery wire after it was out of y connector.The doctor switched to a new stent to complete the surgery.The microcatheter was not replaced.There was no patient injury reported.Additional event information received on 29-aug-2025 indicated that they were not able to torque the device.There was no evidence of physical material within the device.The microcatheter was a j&j product, however, the brand is not available.The microcatheter did not kink/bent.There was no excessive force used with the devices.The procedure was not prolonged or delayed due to the event.
Additional Manufacturer Narrative
Manufacturer ref# (b)(4) information regarding patient weight, height, medical history, race, and ethnicity was not reported.Section e1.Initial reporter phone: (b)(6).Section h3 - the device is available to be returned for evaluation and testing.However, it has not been received to date.If the device returns, a device investigation will be performed.This report is being submitted pursuant to the provisions of 21 cfr, part 803 (and/or part 4, as applicable).This report may be based on information which has not been investigated or verified prior to the required reporting date.This report does not reflect a conclusion by cerenovus, or its employees that the report constitutes an admission that the product, cerenovus, or its employees caused or contributed to the potential event described in this report.If information is obtained that was not available for the initial report, a follow-up report will be filed as appropriate.
Additional Manufacturer Narrative
Manufacturer ref# (b)(4).Updated sections on this medwatch: b4, d9, g3, g6, h2, h3, h6 and h11.Complaint conclusion: a healthcare professional reported that during endovascular embolization, the delivery wire of an enterprise2 4mmx39mm vascular reconstruction device (encr403912, 9320828) passed through microcatheter tip, but the stent body was impeded in microcatheter tip and could not pass through the microcatheter.The doctor only retracted the stent alone but the stent was found detached from the delivery wire after it was out of y connector.The doctor switched to a new stent to complete the surgery.The microcatheter was not replaced.There was no patient injury reported.Additional event information received on 29-aug-2025 indicated that they were not able to torque the device.There was no evidence of physical material within the device.The microcatheter was a j&j product, however, the brand is not available.The microcatheter did not kink/bent.There was no excessive force used with the devices.The procedure was not prolonged or delayed due to the event.The device was returned to j&j medtech for further evaluation.A non-sterile enterprise2 4mmx39mm vascular reconstruction device was received contained in the decontamination pouch.Upon receiving the device, visual inspection was performed, and as described in the event, the stent was already detached from the delivery system.Microscopic inspection was performed on the stent component.It was observed to be in good condition; there was no structural damage (i.E., no broken struts, no kinks); also, it was noted fully expanded, both ends can be noted as completely flared.The delivery wire was subjected to dimensional analysis and those specifications that control the attachment and delivery of the stent were found within specifications.Therefore, device failure is not suspected to be a contributing factor.A device history record (dhr) was performed and it indicated this product was final inspection tested at lake region medical and was determined to be acceptable.The customer complaint regarding a stent being detached was confirmed since the stent was noted as already separated from the delivery system; based on this condition, the issue regarding a stent being impeded in the concomitant microcatheter cannot be evaluated through functional testing.The stent must be inside the introducer tube to perform the functional analysis.Additionally, none of the returned components present damages that suggest that they were forcibly advanced.With the limited information available, a conclusive cause cannot be determined; however, it is possible that clinical and procedural factors, including device manipulation and operator's technique, may have contributed to the reported failure.At this time, there is no evidence to support that the issue reported in the complaint is a result of a defect inherently related to the device.As part of the j&j medtech quality process, all devices are manufactured, inspected, and released to approved specifications.Since there was no evidence to suggest the event was related to a manufacturing or design issue, no capa activity is required.It should be noted that product failure could be caused by multiple factors.The instructions for use (ifu) do contain the following recommendations: do not partially deploy the stent from the introducer.Do not apply undue force if resistance is encountered at any point during stent manipulation.Withdraw the unit and advance a new one.Confirm the tip of the delivery wire is entirely within the introducer.As part of the post market surveillance program, information from this complaint is trended to identify statistical signals for consideration of further correction action.Since there was no evidence to suggest the event was related to a manufacturing or design issue, no corrective actions will be taken at this time.A supplemental report will be submitted if new facts arise which materially alter information submitted in a previous mdr report.

• Brand Name: CERENOVUS ENTERPRISE
• Common Device Name: INTRACRANIAL NEUROVASCULAR STENT
• Manufacturer (Section D): MEDOS INTERNATIONAL SARL; chemin-blanc 38; le locle neuchatel CH-24 00; SZ CH-2400
• Manufacturer (Section G): CERENOVUS INC; 325 paramount dr; raynham MA 02767
• Manufacturer Contact: henry boden ; 31 technology dr; irvine, CA 92618 ; 9497882078
• MDR Report Key: 22939451
• Report Number: 3008114965-2025-00941
• Device Sequence Number: 9768644
• Product Code: NJE
• UDI-Device Identifier: 10886704075394
• UDI-Public: (01)10886704075394(17)270828(10)9320828
• Combination Product (Y/N): N
• Initial Reporter Country: CH
• PMA/510(K) Number: H60001
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Serviced by Third Party (Y/N): Unknown
• Reporter Type: Manufacturer
• Report Source: Foreign,Health Professional
• Initial Reporter Occupation: Other Health Care Professional
• Type of Report: Initial,Followup
• Report Date (Section B): 10/01/2025

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 Catalogue Number: ENCR403912
• Device Lot Number: 9320828
• Was Device Available for Evaluation?: Device Returned to Manufacturer
• Is the Reporter a Health Professional?: Yes
• Type of Report(Section G): Thirty-Day
• Initial Date Received by Manufacturer: 08/11/2025
• Supplement Date Received by Manufacturer: 09/22/2025
• Initial Report FDA Received Date: 09/02/2025
• Supplement Report FDA Received Date: 10/01/2025
• Was Device Evaluated by Manufacturer? (Y/N): Yes
• Date Device Manufactured: 09/27/2024
• 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
• Concomitant Medical Products and Therapy/Usage Dates: JOHNSON & JOHNSON MICROCATHETER.
• Patient Sex: Unknown