It was reported the patient received an e-57 (= electronic error) message on her aviva combo meter.The patient inserted new batteries, but the meter did not work anymore.Therefore, the patient had to inject insulin directly with the pump without a bolus calculation.After a while, the patient was suffering from ketoacidosis and called the ambulance.The patient was administered insulin in the ambulance in front of her house.After 45 minutes, as the patient was not reacting to the given insulin, she was admitted to the hospital for further treatment.Patient was hospitalized for one week.At the hospital, the nurse inserted new batteries in the meter and the meter has been working again ever since.Therefore, the patient does not want to return the meter for investigation.
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