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  • Title: [Experimental and clinical evaluation latamoxef in newborn and premature infants].
    Author: Toyonaga Y, Kurosu Y, Sugita M, Kitagawa M, Hori M.
    Journal: Jpn J Antibiot; 1983 Sep; 36(9):2322-35. PubMed ID: 6655851.
    Abstract:
    Basic and clinical studies of latamoxef (LMOX) were carried out in neonates. In basic study, these neonates consisted of 16 mature babies and 12 premature babies. LMOX was administered at dose of 10 and 20 mg/kg, either as a single intravenous injection or as a 60 minutes intravenous drip infusion. Both the mature babies and the premature babies were divided into 3 subgroups as a function of the number of days after birth (0--3, 4--7 and 8--25 days). A clinical study of LMOX was performed in 12 neonates aged between 0--35 days, consisting 6 males and 6 females. (Purulent meningitis 4 cases, septicemia 1 case, bronchopneumonia 5 cases, pertussis pneumonia 1 case, urinary tract infection 1 case). Serum concentration and urinary excretion 10 mg/kg, one shot intravenous injection In the 3 subgroups of neonates the peak serum concentrations of LMOX were found to range from 14.6 to 28.9 micrograms/ml. Although there was no significant difference, the half-life of the drug became shorter as the age of the neonates increased, these values were 4.46, 3.85 and 3.30 hours, respectively. 10 mg/kg, 60 minutes intravenous drip infusion. As above, the peak LMOX serum concentrations were found to range from 23.7 to 38.9 micrograms/ml, the half-lives of the 3 subgroups were 4.83, 2.48 and 3.01 hours, respectively. And urinary excretions were ranged from 46.0 to 56.5% for 6 hours. 20 mg/kg, one shot intravenous injection The peak serum concentrations were found to range from 31.0--82.5 micrograms/ml, and it was found out 3.29--15.9 micrograms/ml at 8 hours after the injection. There was a tendency for the half-life to be shorter in more mature subjects in 3 subgroups. 20 mg/kg, 60 minutes intravenous drip infusion In the 3 subgroups, the peak concentration was the level existing at the end of the intravenous drip infusion, and that showed a range of 41.8--58.6 micrograms/ml. Half-lives were found out the significant difference to their age, these showed 4.08, 2.31 and 2.52 hours. Cerebrospinal fluid concentrations of LMOX Cerebrospinal fluid concentrations of LMOX were studied in 2 cases at the dose about 50 mg/kg. In 1 case, that's meningitis estimated E. coli organism, the cerebrospinal fluid concentrations of LMOX were found to range from 29.0 to 49.9 micrograms/ml in that acute state. In another case from N. meningitidis, that values were found to range 12.1 to 21.3 micrograms/ml. These cerebrospinal levels were superior value at it's penetration ratio. Clinical studies.(ABSTRACT TRUNCATED AT 400 WORDS)
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