14-8 
Symptoms Possible Cause  Correction Action 
Abnormally high or 
low readings 
Transducer too High or too Low.  Adjust the position of the transducer 
and make sure that it is level with the 
heart, approximately at the level of 
the midaxillary line. 
Zero the transducer as described in 
14.3 Zeroing the Transducer. 
Unable to Zero  Stopcock not open to atmosphere.  Check the transducer and make sure 
the stopcock is turned to the air.