Axis

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Axis

In Cartesian charting, a line that bisects a chart. The x-axis cuts a chart horizontally, while the y-axis cuts it vertically.
References in periodicals archive ?
However, measuring the MAP at the tragus versus the phlebostatic axis, or both at times, presents several key added challenges falling within environmental, treatment, communication, and nursing workflow domains.
Figure 1 shows that the 2 most common reference points to consider for transducer placement include the phlebostatic axis (right atrium of the heart) and the tragus (external auditory meatus).
The phlebostatic axis has been empirically demonstrated as a valid anatomic reference point for the right atrium, while both the phlebostatic axis and midanterior-posterior diameter have been found to be valid reference points for the left atrium in supine backrest positions.[32,33,73] Current research findings are inconclusive, however, regarding empirical determination of valid reference points for coronary atria and reliability of pulmonary artery pressure measurements in lateral side-lying positions.[7,16,23,31,33,50]