International Scholarly Research Notices / 2011 / Article / Tab 1

Research Article

Diagnostic Potential of Distortion Product Otoacoustic Emissions in Noninvasive Assessment of Elevated Intracranial Pressure: Different Patterns of DPOAE Alterations in the Guinea Pig

Table 1

Overview of all measured ICP intervals with stable ICP in the range of ±2 mmHg of the target value indicated in the table and the information whether they were valid. For valid ICP intervals the pattern of DPOAE level alterations is given. For explanation of the two patterns see Figure 1. Note that the second pattern only occurred at the respective highest ICP value.

Animal no.ICP [mmHg]ValidPattern

118yesfirst
22yesfirst
24yessecond

218no1
22yesfirst
24yesfirst

318yesno change
22yesfirst
24yessecond

418yes first
22no2

518yesfirst
22yesfirst
24yessecond

618yes no change
22no2

718no1
22no1first
24yes

818no1
22yesno change
24no1

918yesfirst
22yessecond
24no2

1018yesfirst
22yesfirst
24yessecond

1invalid because meanpostICP did not stabilize in the range of ±2 SDbaseline compared to meanpreICP in all frequencies.
2invalid because SaO2 dropped below 80%. In these cases, no further pressure steps were recorded.
See Section 2.3 for calculations and inclusion criteria.

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