The customer reported that this unit was displaying intermittent communication loss (comm loss).According to the customer, it will work for about 45 minutes to an hour and then go into comm loss for about 1-2 minutes.Technical support (ts) advised the customer to switch the port that the unit is plugged into; however, the customer chose to change the org unit.Ts walked the customer through the steps of changing the unit.The unit was not in patient use at the time.Nihon kohden continues to investigate the reported event.Nihon kohden will submit a supplemental report in accordance with 21 cfr section 803.56 when additional information becomes available.The following fields contain no information (ni), as attempts to obtain information were made, but not provided: a2 - a6 attempt # 1: 12/07/2023 emailed the customer via microsoft outlook for patient information: the customer replied by stating; we don't have and can'g give out the patient information.B6 attempt # 1: 12/07/2023 emailed the customer via microsoft outlook for patient information: the customer replied by stating; we don't have and can'g give out the patient information.B7 attempt # 1: 12/07/2023 emailed the customer via microsoft outlook for patient information: the customer replied by stating; we don't have and can'g give out the patient information.Additional model information: d10 concomitant medical device: the following device were used in conjunction with the org: zm transmitters: model #: zm-531pa serial #: (b)(6) device manufacturer date: 12/13/2016 unique identifier (udi) #: (b)(4).Returned to nihon kohden: no model #: zm-531pa serial #: (b)(6) device manufacturer date: 12/20/2021 unique identifier (udi) #: (b)(4).Returned to nihon kohden: no.
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