title: Precipitation of trace elements in parenteral nutrition mixtures.
abstract: Trace elements are an essential additive to parenteral nutrition (PN) mixtures. Previous studies have indicated that certain trace elements, in particular copper and iron, may interact with complete PN mixtures leading to precipitate formation. The causes of these incompatibilities have not been fully elucidated. The purpose of this study was to determine factors responsible for common trace element incompatibilities, using X-ray energy dispersive spectroscopy to examine the elemental content of precipitates isolated from stored PN mixtures with added trace elements. Results indicated that copper sulphide precipitated most rapidly in PN mixtures containing Vamin 9 and in mixtures stored in multilayered bags. Copper sulphide precipitation was delayed in PN mixtures containing Vamin 14 and was not observed in PN mixtures stored in EVA bags. Iron phosphate precipitates were observed in Synthamin-containing PN mixtures after storage, but this was prevented in mixtures containing vitamins stored in multilayered bags.
authors: Medicines Research Unit, School of Health and Community Studies, University of Derby, Mickleover, Derby DE3 5GX, UK.
authors: M C
authors: MC
authors: Allwood
authors: H
authors: H
authors: Martin
authors: M
authors: M
authors: Greenwood
authors: M
authors: M
authors: Maunder
mesh_terms: D000596:Amino Acids / Q000737:chemistry; D011232:Chemical Precipitation; D003300:Copper / Q000737:chemistry; D003545:Cysteine / Q000737:chemistry; D004573:Electrolytes; D005947:Glucose; D006801:Humans; D007501:Iron / Q000737:chemistry; D010288:Parenteral Nutrition; D057947:Parenteral Nutrition Solutions; D010758:Phosphorus / Q000737:chemistry; D012996:Solutions / Q000737:chemistry*; D013057:Spectrum Analysis; D013455:Sulfur / Q000737:chemistry; D014131:Trace Elements / Q000737:chemistry*; D014965:X-Rays
chemical_list: D000596:Amino Acids; D004573:Electrolytes; D057947:Parenteral Nutrition Solutions; D012996:Solutions; D014131:Trace Elements; C545824:amino-acid, glucose, and electrolyte solution; D010758:Phosphorus; D013455:Sulfur; D003300:Copper; D007501:Iron; D005947:Glucose; D003545:Cysteine