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Figure 4 | BioMedical Engineering OnLine

Figure 4

From: The effect of baseline pressure errors on an intracranial pressure-derived index: results of a prospective observational study

Figure 4

Trend plots of RAP [correlation coefficient (R) between the intracranial pressure (ICP) wave amplitude (A) and the mean ICP level (P)] of Signals 1 and 2 in patient 9. For patient 9 the trend plots of (a) RAP determined during 100 consecutive 4-min periods for signals 1 (blue line) and 2 (red line) show marked differences (average of RAPSignal 1 0.17; average of RAPSignal 2 0.59). The horizontal lines at RAP 0.6 illustrate a commonly used upper normal threshold for RAP. The intracranial locations of the ICP sensors 1 and 2 are shown in (b).

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