The engineering manager at the user facility conducted testing of the cool-cap system.In this testing it was determined that the water was correctly reaching set temperature and the screen would properly respond to commands.The most recent annual maintenance was conducted 8 months prior to the event, during which it was reported that the cooling unit's fans were blocked by accumulated dust.Natus technical service asked for additional details regarding the patient, the patient's condition, specifics of the reported temperature changes, and responsiveness of the touchscreen when the problem occurred, but no response was received.Natus technical service advised that they could not recommend any field repairs and the system must be returned to natus for repair.The system was not returned despite multiple requests sent by natus technical service.
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It was reported to natus by an engineering manager at the user facility that the temperature of a cool-cap system was changing constantly and no alarm would indicate when these temperature changes would occur.The engineering manager stated that nurses at the user facility claimed that the cool-cap system would restart several times during treatment.The nurses claimed that after one of these restarts the cap could no longer be cooled, the water level in the cap was low, and a patient's temperature rose.There was no report of death, serious injury, or environmental/safety concerns.
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