Is Near-Infrared Spectroscopy a Reliable Method to Evaluate Clamping Ischemia during Carotid Surgery?

Table 1

Patient characteristics and analysis of the difference between the groups in relation to shunting and symptoms at awakening.

Characteristics		Num./mean	%/SD	Not shunted	Shunted	P	Asympt.	Sympt.	P
Patients		473		432	41		470	3
Sex	M	305		279	26	NS	305	0	0.0044
	F	168		153	15		165	3
Age		73.3	7.4	73.3 ± 7.4	73.3 ± 7	NS	73.3 ± 7.3	74.6 ± 9	NS
Symptoms	none	333	70.4	305	28		332	1
	TIA	46	9.7	42	4		45	1
	ocular	11	2.3	9	2		11	0
	VB/; borderline	30	6.4	27	3	NS	30	0	NS
	m-stroke	32	6.8	27	5		31	1
	stroke	21	4.4	20	1		21	0
Contralat. stenosis	None	311	65.7	291	20		310	1
	>70%	134	28.3	123	11	<0.0001	132	2	NS
	Occlusion	28	5.9	18	10		28	0
Positive CT scan	Ipsilateral only	60	12.7	52	8		59	1
	Bilateral	102	21.6	94	8	NS	101	1	NS
	Contralat. only	42	0.9	37	5		42	0
Monitoring	T0	64.8	±9.8	64.9 ± 9.7	64.4 ± 10.3	NS	64.9 ± 9.7	50.6 ± 14.4	0.012
	Delta-RSO2	13.5	±9.8	12.3 ± 8.7	26.1 ± 11.1	<0.0001	13.4 ± 9.7	32.4 ± 5.4	<0.001
	Stump pressure	59.8	±23.13	61.9 ± 22.6	38.6 ± 16.1	<0.0001	59.6 ± 23.1	52.3 ± 28.5	NS