Objectives: The aim of this study was to evaluate the physico-chemical stability of compounded total parenteral nutrition admixtures through peroxidation assay and ultraviolet-visible spectroscopy, high-performance liquid chromatography analysis, nuclear magnetic resonance spectrometry, pH meter, and dynamic light scattering.
Methods: The present study considered parenteral nutrition (PN) admixtures for pediatric and adult patients. The admixtures were characterized by a high content of vitamins and trace elements. They were prepared in one- or two-chamber bags in the hospital pharmacy using an automatic compounding system in a sterile room with laminar airflow at different temperature conditions and light exposure. The experiment setup comprised fat emulsions, lipid-free PN solutions, and single-chamber bags before and after adding vitamins and trace elements. The stability at room temperature (+25°C) and cold temperature (+2-8°C) was assessed by various means.
Results: Two-compartment admixtures, single-chamber bags, and all-in-one PN supplemented with vitamins and trace elements are stable up until 35, 9, and 7 d, respectively, when protected from light and stored at +2 to 8°C. Also, the supplemented single-chamber PN was found to be stable up to 48 h when stored at +25°C with light exposure.
Conclusions: The results obtained will help improve PN management at the compounding center and in hospital wards, because they allow for the extension of the validity time frame provided so far by the different formulations and, therefore, therapy scheduling over several days.
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