Details of complaint: the biomedical engineer (bme) reported that central nurses station (cns) was not showing the electrocardiogram (ecg) and heart rate (hr) values when the transmitter was being used in hi-q view.However, the transmitter was showing the values.Bme resolved the issue by monitoring the transmitter by itself and changing the leads.They would like this recent occurrence documented under the cns that was affecting another transmitter, sn: (b)(6), in conjunction with org sn: (b)(6)- previous occurrences documented on tickets (b)(4) with the same cns and org.A similar event was documented on ticket (b)(4).No patient harm was reported.Investigation summary: as a result of the investigation, it was confirmed that the phenomenon could be reproduced when on the hiq-view function of the bedside monitor g5/g7.When switching the 6-electrode leads and the 3-electrode leads for the ecg of the zm transmitter, the g5/g7 operated to set the lead i to the chest leads (c1, c2).The correct behavior is to set one of the v1 to v6 leads for the chest leads (c1, c2).Although the customer reported that the hiq-view function was not used when the phenomenon of the 1st issue happened, it could not be identified from the log information because the log information didn't include the history when the phenomenon happened.The cause was identified as the software of the g5/g7 monitoring unit when using the hiq-view function.Nkc plans to implement a countermeasure for the issue in the next g5/g7 monitor's software version, 02-27, estimated to be released in august 2023.To prevent the reoccurrence, update the g5/g7 monitors software once the countermeasure software is released.The issue will continue to be monitored and will be reassessed after the release of the next software version.Additional device information: d10 concomitant medical devices: the following devices were used in conjunction with the cns: transmitter: model #: zm-531pa, serial #: (b)(6), device manufacturer data: 23/12/2021, unique identifier (udi) #: (b)(4), returned to nihon kohden: na.Org: model #: org-9110a, serial #: (b)(6), device manufacturer data: 26/08/2021, unique identifier (udi) #: (b)(4), returned to nihon kohden: na.G5 monitor: model #: ni, serial #: ni, device manufacturer data: ni, unique identifier (udi) #: ni, returned to nihon kohden: na.G7 monitor: model #: ni, serial #: ni, device manufacturer data: ni, unique identifier (udi) #: ni, returned to nihon kohden: na.
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