. Author manuscript; available in PMC: 2013 Jul 23.

Published in final edited form as: Neurosurgery. 2012 May;70(5):1258–1264. doi: 10.1227/NEU.0b013e31823f6571

Table 3.

3^rd and 4^th ventricle clearance rates comparing ipsilateral and contralateral EVD placements among cases receiving thrombolytic

Catheter Laterality Cohorts	3^rd and 4^th Ventricular Clearance	Significant P Value	Confidence Interval
Clearance in 3^rd Ventricle Among Ipsilateral and Contralateral EVD Placements
Ipsilateral 3^rd Ventricle (n = 8)	−27.22	< 0.001	(−34, −20.44)
Contralateral 3^rd Ventricle (n = 28)	−27.36	< 0.001	(−33.72, −20.99)

Clearance in 4^th Ventricle Among Ipsilateral and Contralateral EVD Placements
Ipsilateral 4^th Ventricle (n = 7)	−31.08	< 0.001	(−35.4, −26.77)
Contralateral 4^th Ventricle (n = 28)	−31.35	< 0.001	(−33.9, −28.79)

3^rd and 4^th Ventricle Clearance Among Ipsilateral versus Contralateral EVD Placements
3^rd Ventricle Contralateral versus Ipsilateral (n = 36)	0.14	0.98	(−9.16, 9.44)
4^th Ventricle Contralateral versus Ipsilateral (n = 35)	0.27	0.92	(−4.75, 5.28)