2018 年 44 巻 7 号 p. 349-354
There are few reports regarding the optimal decomposition condition of the antimicrobial agent. We therefore conducted a questionnaire about the decomposition operation of the antimicrobial agent vial preparation for nurses in Osaka Saiseikai Nakatsu Hospital. Furthermore, the optimal dissolution conditions for “Zosyn ® IV for intravenous injection 4.5 (tazobactam/piperacillin; TAZ/PIPC)” were examined. As a result of the questionnaire survey, most nurses selected a syringe of 10 mL for formulations that are easy to dissolve while, for difficult to dissolve formulations, answers were split between 10 mL and 20 mL. The shaking time of vials ranged from under 5 seconds to under 30 seconds for the soluble formulations and from under 5 seconds to more than 1 minute for the difficult to dissolve formulations. We set each decomposition condition from the questionnaire results and examined the optimal condition, which accorded with the clinical settings in the decomposition operation of TAZ/PIPC. As a result of having examined the decomposition condition from the absorbance of each complete decomposition preparation of TAZ/PIPC, it was found that more than 93％ of dissolution was carried out with the injection of saline at 15 mL and the shaking time of 10 or 20 seconds, or the injection of saline at 20 mL and the shaking time of 10 seconds. If the injection volume and the shaking time are less than these conditions, residual drugs are found in the vials.
