title: [Fundamental and clinical studies of cefsulodin in the neonates and premature infants].
abstract: Fourteen neonates and premature infants with ages ranging 1 to 28 days were intravenously given one shot injection of 20 mg/kg of cefsulodin (CFS). Plasma and urine levels and recovery rates of CFS were determined in the first 6 hours after administration. For prophylaxis of infection, a daily average dose of 52.8 mg/kg of CFS was injected intravenously to 3 neonates with ages ranging 2 to 16 days in 2 to 3 divided doses during an average period of 7 days. Along with observations of prophylactic effects on infection, side effects and abnormalities in laboratory test values were examined. The results obtained are summarized below: 1. Of the 9 patients with birth weight of 2,500 g or above, the plasma levels peaked in 6 patients at 5 minutes, in 2 patients at 15 minutes and in the other at 1 hour after administration, with peak levels ranging between 35.8 and 60.6 micrograms/ml. Subsequently, gradual decreases or bimodal tapering changes were noted in the plasma levels. The cause of the delay in the occurrence of maximum peak observed in the 3 patients at 15 minutes or 1 hour after administration and the cause of the appearance of bimodal tapering changes in 3 subjects are not known. A tendency was observed that the younger the age of subject was, the larger the AUC and the longer the half-life became. Half-lives in all 9 neonates were longer than those in average infants who were given intravenous injection at the same dose. 2. Of 5 patients with birth weight of less than 2,500 g, the determination of peak plasma levels was not performed in those within 7 days after birth. Plasma levels, however, were observed to reach their peaks in 4 patients at 5 minutes and in another at 15 minutes after administration, the levels ranging between 41.5 and 56.0 micrograms/ml. Subsequently to this, gradual decreases and bimodal tapering changes of plasma levels were noted. The cause of the delay in plasma levels to reach their maximum peaks values in the 1 patient to 15 minutes after administration and the cause of occurrence of bimodal tapering changes in the 2 patients are not known. A tendency was observed that the younger the age of subjects was, the larger the AUC and the longer the half-life became. This tendency was similar to that observed in the group with birth weight of 2,500 g or above.(ABSTRACT TRUNCATED AT 400 WORDS)
authors.affiliation: Department of Pediatrics, School of Medicine, Kurume University.
authors.forename: T
authors.initials: T
authors.lastname: Motohiro
authors.forename: M
authors.initials: M
authors.lastname: Aramaki
authors.forename: A
authors.initials: A
authors.lastname: Kawakami
authors.forename: K
authors.initials: K
authors.lastname: Tanaka
authors.forename: T
authors.initials: T
authors.lastname: Koga
authors.forename: Y
authors.initials: Y
authors.lastname: Shimada
authors.forename: S
authors.initials: S
authors.lastname: Tomita
authors.forename: Y
authors.initials: Y
authors.lastname: Sakata
authors.forename: T
authors.initials: T
authors.lastname: Fujimoto
authors.forename: T
authors.initials: T
authors.lastname: Nishiyama
mesh_terms: D002441:Cefsulodin / Q000493:pharmacokinetics* / Q000627:therapeutic use; D005260:Female; D006801:Humans; D007230:Infant, Low Birth Weight / Q000378:metabolism; D007231:Infant, Newborn / Q000378:metabolism*; D007232:Infant, Newborn, Diseases / Q000378:metabolism / Q000517:prevention & control; D007234:Infant, Premature / Q000378:metabolism*; D008297:Male
chemical_list: D002441:Cefsulodin