title: [Infusion speed as a factor to influence the analgesic level of spinal anesthesia--hypobaric solution of tetracaine].
abstract: In spinal anesthesia, as known, the injection speed of local anesthetic drug is a factor which influences the analgesic level. For study it, automatic infusion apparatus was available to control as 5 kinds of infusion speed (0.02-0.51 mL/s), and 78 patients were divided into 6 groups. The results of the painless level was discussed by T-test and distribution analysis (F-test). The mean of painless level in each group was found to be no significant difference as discussed by T-test. But the largest distribution was found in the group of 0.04 mL/s, and high analgesic level as rise up to T6 was occasionally found in groups of 0.04 mL/s & 0.02 mL/s. It means, the infusion speed is not an important factor, but extremely slow infusion is more dangerous than high speed infusion, which will take a risk of high level spinal anesthesia.
authors.affiliation: Department of Anesthesiology, School of Medicine, Yokohama City University, Japan.
authors.forename: H Y
authors.initials: HY
authors.lastname: Shih
authors.forename: T
authors.initials: T
authors.lastname: Soga
authors.forename: H
authors.initials: H
authors.lastname: Sakai
authors.forename: F
authors.initials: F
authors.lastname: Okumura
authors.forename: S Y
authors.initials: SY
authors.lastname: Lin
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000698:Analgesia / Q000379:methods; D000775:Anesthesia, Spinal / Q000379:methods; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D013748:Tetracaine / Q000008:administration & dosage*
chemical_list: D013748:Tetracaine