|
The manufacturer conducted a follow up with the initial reporter to gather more information on the incident.The hcp reported that the patient experiences recurring infections in both ears, but not necessarily both at same time.The hcp felt it had been occurring more in left ear.Physician indicated that it could be due to cshell canals being too long.The hcp reported that there were no known coexisting conditions or reduced immunity/susceptibility to infections/taking meds that may have led to infections occurring more often.She further indicated that the patient has no known allergies.The first infection was noted within the first weeks of being fit with cshells.The hcp reported that the patient had history of hearing aid use with silicone earmolds never acrylic like his current models.No other known circumstances were observed that would have led to recurring infections.The hcp reported that patient brushes off cshells using clean cloth as well as occasionally uses alcohol wipes.The patient had been prescribed with medication to treat the infection.The patient is wearing his current devices while still using medication, but symptoms have improved.The hcp and the patient decided to switch to titanium cshells and at the moment of follow up the patient was waiting to be fit with new titanium cshells.The order is being processed.The manufacturer has checked the modelling files of the custom made earpieces (cshells) subject to this incident and confirms the modelling was done according to the order of the hcp.Venting requirements are defined by the hcp.If the requirements set by the hcp can't be met, the hcp would have been notified.In this case the venting style configured by the hcp on the order was applied to the device in the shell modelling step, and it was acceptable from the production side.The custom earmolds are manufactured based on the patient's ears impressions in a way to provide for best audiological gain to compensate for the hearing loss of the patient.The seal the ear canal needed to provide for the controlled acoustic coupling was adjusted to the parameters of the patient's ear impression.A tight seal may foster restrained air circulation and moisture accumulation, which for patients susceptible for infections may lead to infection development.This is however a well-known disadvantage of conventional hearing aids, widely descried in available literature and presented in the clinical evaluation report of the subject device.The accompanying ifu contains instructions on a cleaning routine of the earpieces.The manufacturer checked service records.There were no services to these devices prior to this event.The manufacturer checked for similar complaints in the last three years and there have been no trends identified.The manufacturer will keep observing for trends.This is the final report.
|