n admixtures are summarized.

Objective To evaluate the effect of iron on the stability of fat emulsion in total nutrient admixture (TNA) in pediatrics. Methods Based on intravenous nutrition preparation and handling protocols, 0,0.25, 0.50, 0.75, and 1.00 mg iron sucrose was added in each 100 ml TNA, respectively, and each dose was prepared for 10 bags. The stability of fat emulsion was observed by electron scanning microscopy. The pH and osmolality were determined at different time points (0, 24, 48, and 72 h). Results The fat particle size, percentages of particles ＞ 0.5 μm, pH value, and osmolality were not significantly different among all the groups at different time points (all P ＞ 0.05). The mean particle sizes of the fat emulsion were ＜ 0.5 μm in all groups within 72 h.No fat particle with diameter ＞ 5 μm was seen in each group. Conclusion TNA containing iron sucrose with concentrations range 0.25-1.00 mg per 100 ml is stable.

Objective To evaluate the effects of iron dextran or iron sucrose on the stability of fat emulsion in total nutrient admixture (TNA) in pediatric settings.Methods TNA with different intravenous doses of iron sucrose or iron dextran (0.25,0.5,0.75,or 1.00 mg) were prepared,and each dose was prepared 10 bags.The TNAs were stored at 25 ℃ for 3 days,and the stability of fat emulsion was observed by electron scanning microscopy.Meanwhile,the pH and osmolality were also measured.Results The particle sizes of fat emulsions in TNA with different concentrations of iron sucrose or iron dextran at different time points were not significantly different (F =0.32,P =0.7836 ; F =1.73,P =0.1321,respectively).The mean particle size of the fat emulsion in each group was ＜ 0.5 μm within 72 hours.For TNA containing different concentrations of iron,the percentage of particles ＞ 0.5 μm,pH,and osmotic pressure showed no significant difference at different time points (percentage:F =1.47,P =0.3467 ; F =1.04,P =0.4758.pH:F =0.63,P =0.5942 ; F =0.46,P =0.6825.osmotic pressure:F =1.37,P =0.3648 ; F =0.65,P =0.6023).Conclusion The TNA addeded with iron sucrose or iron dextran with an concentrations of ＜ 1％ is stable.