Incorrectly Charted Operating Rooms, With Resulting Overlapping Times, Corrected Using Meta-Data From Monitors Transmitting Pulse Oximetry Measurements.

Recorded operating rooms (ORs) in electronic health records can differ from the actual anesthetizing locations. A retrospective cohort of cases revealed a 40% (846/2123) room location error rate in the obstetrical (OB) suite compared to 0.03% (18/56,044) in 3 large surgical suites.