Table 1.

Mean values of pressures during baseline, infusion and drainage

	CSF pressure (mmHg)	Sinus pressure (mmHg)	p value	CSFp-SSp (mmHg)	p value
Baseline	27.0 ± 2.3	25.2 ± 7.5	p = 0.026; N = 10	2.34 ± 2.72	0.01953
Infusion	38.0 ± 8.0	33.1 ± 12.0	p = 0.01; N = 7*	4.9 ± 4.0	p = 0.026; N = 7*
Drainage	12.7 ± 5.6	16.0 ± 2.7	p = 0.02; N = 8	− 3.2 ± 3.9	p = 0.0097; N = 8

*In 3 patients, only drainage was performed, as baseline CSFp was > 40 mmHg

CSFp cerebrospinal fluid pressure, SSp pressure of the sagittal sinus