An emergency department patient when into cardiac arrest.An automatic chest compression system was placed on the patient and malfunctioned.The malfunction noted was that the system showed a full battery, but after about two minutes in use, one of the battery lights turned orange and the unit made an alarming sound.A staff member replaced the battery, and after another two minutes of use with a new battery, and again, the battery light turned orange and the alarm sounded.The system was removed from the patient while manual compression were performed.The malfunction resulted in a staff member having to leave the patient's side to find another chest compression system.There was no adverse outcome for the patient related to the failure of the initial chest compression system.The chest compression system was pulled from service and brought to the biomedical engineering department.Follow up: the affected chest compression system was purchased in approx 2 years ago and the last preventative maintenance was completed by the manufacturer less than 1 year ago.Biomedical engineering contacted the manufacturer and requested service on the device after they were unable to reproduce the reported problem.When tested, the device ran as intended.The manufacturer next tested the unit and also could not replicate the complaint.They reseated all connections and reloaded software 2.2.Performed performance inspection procedure and all checks were ok.Unit returned to service.
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