Figure 10
From: Noninvasive detection of elevated ICP using spontaneous tympanic membrane pulsation
The slope ratios (in percentage) of TMp waveforms after and before the peak for all the 15 subjects at different tilt angles. The ratios start at low values before rising rapidly with tilt induced ICP increase. Hyperventilation tended to reverse tilt effect. The slope ratio was significantly different between normal and elevated ICP states (P = 2.3E−07, unpaired two tailed t-test). A threshold (dashed line) can separate the normal and elevated ICP with 100% accuracy.
