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  • Title: Stability of sufentanil and levobupivacaine solutions and a mixture in a 0.9% sodium chloride infusion stored in polypropylene syringes.
    Author: Jäppinen A, Turpeinen M, Kokki H, Rasi A, Ojanen T, Pelkonen O, Naaranlahti T.
    Journal: Eur J Pharm Sci; 2003 May; 19(1):31-6. PubMed ID: 12729859.
    Abstract:
    We have evaluated the chemical and microbiological stability of sufentanil citrate, levobupivacaine hydrochloride and a mixture in a 0.9% sodium chloride infusion in order to provide background information on the storage of a sufentanil-levobupivacaine mixture in polypropylene (PP) syringes. Chemical assays were performed by HPLC on days 0, 1, 2, 3, 8, 14, 23, 28 and 30 after storage at 4, 21, and 36 degrees C. Microbiological stability was evaluated under aseptic conditions using a laminar air flow station, with a grade A environment and a B background. The samples taken for microbiological analysis were collected immediately after preparation of the solutions and then after 7, 14, 21 and 28 days storage. At 4 degrees C the sufentanil citrate solution was stable for 23 days. At 21 degrees C the sufentanil citrate solution maintained chemical stability for 3 days, but thereafter the concentration of sufentanil decreased 15% from day 3 to day 8. At 36 degrees C a similar decrease was noticed from day 1 to day 3. On the contrary, the levobupivacaine hydrochloride solution maintained chemical stability for 28 days at 4 and 21 degrees C and for 23 days at 36 degrees C. The sufentanil-levobupivacaine mixture maintained chemical stability for 28 days at 4, 21 and 36 degrees C. The sufentanil and levobupivacaine solutions and the mixture studied maintained microbiological stability for 28 days. According to the chemical and microbiological stability studies, the sufentanil-levobupivacaine mixture in PP syringes could be stored for 28 days at 4 and 21 degrees C.
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