Nurses are currently manually entering vital signs data into the electronic medical record (emr).
Nurses have noticed that the mean pressure value that is calculated by the emr is sometimes different from the mean value displayed on the patient monitor.
A few sample values were obtained: (systolic/diastolic mean) 129/65 81 emr mean 86; 146/78 95 emr 101; 134/54 81 emr 84; 150/98 116 emr 115.
We were unable to verify if this occurs with a different patient monitoring vendor (such as in the er) because in that case the emr does not display the mean value.
Nurses reporting this problem say that they have seen much larger variations but i do not have specific numbers to report yet.
====================== manufacturer response for patient monitor, (brand not provided)======================per clinical support with ge, the mean pressure is measured in the oscillometric method and is the most accurate pressure value since the systolic and diastolic are then calculated from the mean.
Most emr's take the systolic and diastolic numbers and then calculate the mean using a formula intended for auscultatory readings.
Therefore there will be variations.