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TABLE 2: Pressure and flow in the dome of a surgically created canine aneurysm, injection at 5 mL/s over 4 seconds
Characteristic Before GDC Placement After GDC Placement
In Vivo In Vitro P Value In Vivo In Vitro P Value
Increase in pressure P 7.4 ± 1.5 21.0 ± 0.8 <.05 9.5 ± 2.6 15.2 ± 1.3^* <.05
Change in temperature ΔT, °C 9.66 ± 0.09 9.28 ± 0.16 >.05 1.74 ± 0.25^* 4.45 ± 1.36^* <.05
Pressure-flow shift ε, seconds 0.30 ± 0.25 0.33 ± 0.09 >.05 1.68 ± 0.87^* 0.66 ± 0.19^* <.05
Dilution interval, seconds 7.32 ± 0.54 8.21 ± 0.75 >.05 21.15 ± 1.34^* 11.33 ± 2.21^* <.05
Note.—Injections were normal saline at room temperature. Data are the mean ± SD. P values were determined with a two-sided Student t test.
* P < .05 before GDC placement versus after GDC placement.

Characteristic	Before GDC Placement			After GDC Placement
	In Vivo	In Vitro	P Value	In Vivo	In Vitro	P Value
Increase in pressure P	7.4 ± 1.5	21.0 ± 0.8	<.05	9.5 ± 2.6	15.2 ± 1.3^*	<.05
Change in temperature ΔT, °C	9.66 ± 0.09	9.28 ± 0.16	>.05	1.74 ± 0.25^*	4.45 ± 1.36^*	<.05
Pressure-flow shift ε, seconds	0.30 ± 0.25	0.33 ± 0.09	>.05	1.68 ± 0.87^*	0.66 ± 0.19^*	<.05
Dilution interval, seconds	7.32 ± 0.54	8.21 ± 0.75	>.05	21.15 ± 1.34^*	11.33 ± 2.21^*	<.05