Heated tracheostomy collar noted to be alarming.Blue tubing to collar noted to be melted.The patient had a red mark on her upper left arm - question a burn.No open areas noted at time of incident.Tubing also noted to be resting on blue turn system.Diagnostic tests of the humidifier were conducted in accordance with the manufacturer's written procedure.The device passed the display accuracy test and the functional test.The device was left operational for 3 hours with no malfunctions noted.A new patient heated-wire breathing circuit assembly inspiratory limb was used during the testing.The temperature probe that was being used when the incident occurred was used during the testing procedure and was found to be working properly.The failed circuit was retained by the hospital and the humidifier was returned to service after thorough testing/inspection as mentioned above.
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