Table 1.

Patient characteristics in conventional groups

Case	Diagnosis	Drainage tube position	Antibiotics before administration
1	Central neurocytoma of left ventricle	Ventricles	Intraoperative 2 g ceferiaxonea
2	Glioblastomas of right forehead	Operational cavity drainage	Piperacillin sodium and Sulbactam sodium: 5gQ8h
3	Right frontotemporal glioma	Operational cavity drainage	Intraoperative 1.5 g cefuroxime
4	Meningioma of left petrosal apex	Subdural drainage	Intraoperative 2 g ceferiaxone
5	Meningioma of left ventricle	Operational cavity drainage	Intraoperative 1 g ceferiaxone
6	Left cerebral arteriovenous malformation	Hematoma cavity	Ceftazidine: 2gQ8h
7	Bleeding of cerebellar glioma, ventriculopuncture drainage	Ventricles	Intraoperative 2 g ceferiaxone
8	Right frontal clear cell carcinoma	Operational cavity drainage	Intraoperative 2 g cefuroxime
9	Right frontotemporal glioma	Operational cavity drainage	Intraoperative 1.5 g cefuroxime
10	Fracture of left cerebral artery aneurysm,SAH	Ventricles	Ceftazidine: 2gQ8h
11	Left petroclival meningioma	Operational cavity drainage	Ceftazidine: 2gQ8h
12	Petroclival meningioma	Operational cavity drainage	Sulperazone: 1.5gQ6h
13	Central neurocytoma	Operational cavity drainage
14	Astrocytoma of thalamus and midbrain	Ventricles	Ceftazidine: 2gQ8h

^aWell as cerebrospinal fluid penetration rate, ceftriaxone, widely used in China