MAUDE Adverse Event Report: MED-EL ELEKTROMEDIZINISCHE GERAETE GMBH MED-EL MAESTRO COCHLEAR IMPLANT SYSTEM

Model Number MI1250 SYNCHRONY 2

Device Problems Device Appears to Trigger Rejection (1524); Adverse Event Without Identified Device or Use Problem (2993)

Patient Problems Tinnitus (2103); Dizziness (2194)

Event Type  malfunction  

Manufacturer Narrative

The device has not been explanted.If it should be explanted, it is to be returned to the manufacturer for evaluation.When available, a device failure analysis will be submitted as a follow up report.

Event Description

Reportedly, around 2 months after implantation surgery the user's residual hearing disappeared.At this time the user also suffered from tinnitus and vertigo.The sound performance received by the implant was reported to have decreased significantly.An electrode extrusion is suspected.

Manufacturer Narrative

Additional information: based on the received information from the field, the recipient has experienced occasional tinnitus and dizziness since few months after implantation, which are known post-operative side effects of cochlear implantation.The tinnitus, which had been experienced also before implantation, is present with or without use of the device, and the dizziness is triggered by physical movement; thus, medical factors seem to be contributing to these symptoms as well.Furthermore, temporary impedance fluctuations were seen, which were likely caused by physiological issues.Treatment with cortisone improved the situation.In addition, a minor migration of the active electrode out of cochlea seems possible i.E.One electrode channel might be out of cochlea despite full insertion at implantation.Currently, re-fitting is considered, but the recipient has not attended any further appointment.

Event Description

Around 2 months after implantation surgery, the user's residual hearing disappeared and there were tinnitus and vertigo.The sound performance received by the implant decreased significantly.Cortisone treatment was started and has had a positive effect on the impedances and hearing performance.However, during training, tinnitus, instability and dizziness increased.Tinnitus is also present without use of the device.The recipient has a history of tinnitus before implantation.Dizziness is not always present, as it is mostly connected to sporting and physical activity.As of information received on the 8th september 2020 the user has not been seen again by the clinic.The recipient contacted the clinic on the 24th august 2020 reporting dissatisfaction with the new maps with higher mcl levels in the low frequencies.The map in use has the highest frequency energy and is the only map providing auditory benefit, but the user experiences electric shock from some loud sounds.The user has been offered re-fitting but has not responded.

Event Description

Around 2 months after implantation surgery, the user's residual hearing disappeared and they experienced tinnitus and vertigo.The sound performance received by the implant decreased significantly.Cortisone treatment was started and had a positive effect on the impedances and hearing performance.However, during training, tinnitus, instability and dizziness increased.Tinnitus was also present without use of the device.The recipient has a history of tinnitus before implantation.Dizziness was not always present, as it was mostly connected to sporting and physical activity.The user was explanted and re-implanted with a device from another manufacturer in july 2021 because of dissatisfaction, namely the user wanted to have a new start with another implant.The user is doing okay with the new device.

Manufacturer Narrative

Conclusions: device investigation did not reveal any device defect or malfunction which is expected to have been present whilst implanted.Damages found during device investigation are most likely related to the explantation surgery.Based on the received information from the field, the recipient experienced occasional tinnitus and dizziness after implantation, which are known post-operative side effects of cochlear implantation.However, the tinnitus had been experienced also before implantation and was present with or without use of the device, and the dizziness was triggered by physical movement; thus, medical factors seem to have contributed to these symptoms as well.Furthermore, temporary impedance fluctuations were seen, which were likely caused by physiological issues, as treatment with cortisone improved the situation.The explantation was eventually carried out upon recipient's wish because of dissatisfaction with the device.A minor migration of the active electrode out of cochlea was observed at explantation surgery i.E.One electrode channel was found out of cochlea despite full insertion at implantation.This is a final report.

• Brand Name: MED-EL MAESTRO COCHLEAR IMPLANT SYSTEM
• Type of Device: COCHLEAR IMPLANT
• Manufacturer (Section D): MED-EL ELEKTROMEDIZINISCHE GERAETE GMBH; innsbruck ; AU
• Manufacturer Contact: laura simonotti ; fuerstenweg 77a; innsbruck 6020 ; AU 6020 ; 57788
• MDR Report Key: 10118406
• MDR Text Key: 193994834
• Report Number: 9710014-2020-00288
• Device Sequence Number: 1
• Product Code: MCM
• UDI-Device Identifier: 09008737366803
• UDI-Public: (01)09008737366803
• Combination Product (y/n): N
• Reporter Country Code: AU
• PMA/PMN Number: P000025
• Number of Events Reported: 1
• Summary Report (Y/N): N
• Report Source: Manufacturer
• Source Type: Company Representative
• Reporter Occupation: Non-Healthcare Professional
• Type of Report: Initial,Followup,Followup
• Report Date: 11/08/2022

1 Device was Involved in the Event

1 Patient was Involved in the Event

• Date FDA Received: 06/04/2020
• Is this an Adverse Event Report?: Yes
• Is this a Product Problem Report?: Yes
• Device Operator: Health Professional
• Device Model Number: MI1250 SYNCHRONY 2
• Device Catalogue Number: 36709
• Was Device Available for Evaluation?: Device Returned to Manufacturer
• Was the Report Sent to FDA?: No
• Date Manufacturer Received: 05/27/2020
• Was Device Evaluated by Manufacturer?: Yes
• 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 Age: 31 YR
• Patient Sex: Male