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One of the most difficult records to have accurately kept in routine hospital work is the "intake and output" chart. It was my aim to devise a chart that would at a glance give accurately the amount of all fluids ingested and the amount of urine excreted at individual hours throughout the day and night. This chart was designed while I was in the urologic service in the Long Island College Hospital, Brooklyn. It was accepted by the staff and has been used since as a routine as part of the permanent record.
The chart is so arranged that the recording in the intake column on the left and the output on the right both begin at 7 a. m., continuing through the day until 7 p. m., and from 7 p. m. to 7 a. m. The exact amount of fluid ingested or excreted may be hourly noted. There
McCrea LE. AN INTAKE AND OUTPUT CHART FOR HOSPITAL RECORD. JAMA. 1927;89(12):967. doi:10.1001/jama.1927.92690120001015a