Clinical Usage of Different Doses of Cis-Atracurium in Intracranial Aneurysm Surgery and Its Effect on Motor-Evoked Potentials

Table 2

Statistics on spontaneous breathing of patients.

Time	S1 group	S2 group	S3 group
t0	30	30	30
t1	0	0	0
t2	0	0	0
t3	2	0	0