The device is zeroed when the air-fluid interface is opened to atmospheric pressure (otherwise it would read diastolic blood pressures of ~ 760mmHg).Jun 29, 2015
What is zeroing in arterial line?
Zeroing the Transducer By opening the stopcock to air, the monitoring system uses atmospheric pressure as a reference for zero. Pressing the zero button negates the effects of atmospheric pressure so that the pressure values reflect only those of the patient.