Factors which may influence mean arterial pressure measurement.

摘要

The letter by Ahn and Lim in the November 2005 issue of the Canadian Journal of Anesthesia presents direct arterial blood pressure data in a patient under anesthesia, showing that variations in mean arterial pressure (MAP) may result from differences in pressure waveforms even in the presence of stable systolic and diastolic pressure readings. Quoting a previous letter from our team on the empirical equations for MAP estimation,2 the authors suggest that researchers "sometimes forget the limitations in using these equations".1 We provide the following comments.