The customer reported that the thermogard ivtm system (sn (b)(6) temperature was not steadily in rewarming the patient was confirmed during patient event log review.Based on the patient event log, there are multiple "negative strike" in the patient temperature during the rewarming phase.The negative spike phenomena occured when the patient was infused with liquid during the rewarming phase.The thermogard ivtm system algorithm software delayed the rewarming process after the sudden drop of the patient temperature had occurred.Issue can be avoided by placing the thermogard ivtm system in standby mode during liquid infusion or flushing (esophageal, bladder or abdominal) on patient and place back to run mode when the patient temperature is normalized.Therefore, the root cause of the reported complaint was due to user error.The customer has been notified for re-training.During visual inspection, no physical damage was observed on the thermogard console.During event log review, no descrepancies/hardware error was observed.During patient event log, observed multiple "negative strike" in the patient temperature during the rewarming phase therapy.During functional testing, the thermogard xp ivtm system passed the final testing without any error.There was no malfunction and the console performed as intended.
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