Details of complaint: the customer reported that the prefense (edns) monitor was not displaying etco2 data.No patient harm was reported.Investigation summary: as no devices were returned for evaluation relating to this event and no troubleshooting was performed, the reported issue could not be confirmed.As such, a root cause cannot be determined.Due to the age of the complaint, additional information is unlikely to be available.No further issues have been reported.No similar issues were discovered relating to etco2 and this prefense monitor.Possible root causes may be related to improper set-up, incorrect settings, a damaged cable, or a malfunctioning co2 monitor.A serial number review of the reported device does not reveal additional related complaints.A complaint history review of the customer's account does not reveal trends for similar complaints.The following fields contain no information (ni), as attempts to obtain the information were made, but not provided: a2 - a6 b6 b7 d10 attempt #1 09/10/2021 emailed customer via microsoft outlook for all items under the no information section.No reply was received.Attempt #2 09/17/2021 emailed customer via microsoft outlook for all items under the no information section.No reply was received.Attempt #3 09/24/2021 emailed customer via microsoft outlook for all items under the no information section.No reply was received.
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