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  • Title: [Pharmacokinetic study on aspoxicillin transfer into pulmonary and tracheal tissues].
    Author: Nakai K, Tokushima T, Hirota Y, Nagamatsu M, Takeda K, Mizobe M, Takai C.
    Journal: Jpn J Antibiot; 1993 May; 46(5):367-73. PubMed ID: 8326676.
    Abstract:
    Each of 36 patients who underwent tracheotomy for removal of malignant or benign tumors or for treatment of pneumothorax was infused with 2 g of aspoxicillin (ASPC, Doyle injection) intravenously over 1-hour period. ASPC concentrations determined at 1 postoperative time-point in tissues of the lung and trachea and in serum of each patient were analyzed pharmacokinetically to elucidate the transfer of ASPC to the thoracic tissues. The preventive effect of ASPC against postoperative infections was also investigated in 39 tracheotomy patients. 1. The analysis of ASPC concentrations in 36 patients with tracheotomy gave the following results; 1) The peak blood level (about 80 micrograms/ml) was attained at the end of infusion. The serum level then decreased with time to below about 10 micrograms/ml at 6 hours after the start of infusion, with an elimination half-life of about 1.4 hours, which was comparable to that in healthy adults. 2) Peak levels in the lung and tracheal tissues were achieved at about 30 minutes after the start of infusion, at levels of about 30 and 40 micrograms/g, respectively, which decreased to about 5 micrograms/g in both tissues at 6 hours after the start of infusion. 2. Thirty nine patients who were treated with ASPC before operation were examined for the preventive effect of ASPC against postoperative infections for 1 week after operation. No postoperative infection was noted in any patients and ASPC was found to be useful for prevention of postoperative infections. 3. No side effects or abnormal laboratory findings were noted in any patients. Based on the results of the transfer into the tissues of respiratory organs and preventive effect against postoperative infections, we have concluded that ASPC is useful for prevention of infections after thoracic operation.
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