The suggested dosage ranges for the five trace elements are:
ZINC: For the metabolically stable adult receiving TPN, the suggested intravenous dosage level is 2.5 to 4 mg zinc/day. An additional 2mg zinc/day is suggested for acute catabolic states. For the stable adult with fluid loss from the small bowel, an additional 12.2 mg zinc/liter of small bowel fluid lost, or an additional 17.1 mg zinc/kg of stool or ileostomy output is recommended. Frequent monitoring of zinc blood levels is suggested for patients receiving more than the usual maintenance dosage level of zinc. Normal plasma levels for zinc vary from approximately 88 to 112 mcg/100 mL.
For full term infants and children up to 5 years of age, 100mcg zinc/kg/day is recommended. For premature infants (birth weight less than 1500 g) up to 3 kg in body weight, 300 mcg zinc/kg/day is suggested.
COPPER: For the metabolically stable adult receiving TPN, the suggested additive dosage level is 0.5 to 1.5mg copper/day. For pediatric patients, the suggested additive dosage level is 20mcg copper/kg/day. The normal plasma range for copper is approximately 80 to 160 mcg/100 mL.
MANGANESE: For the metabolically stable adult receiving TPN, the suggested additive dosage level for manganese is 0.15mg to 0.8mg/day. For pediatric patients, a dosage level of 2 to 10mcgmanganese/kg/day is recommended.
SELENIUM: For metabolically stable adults receiving TPN, the suggested additive dosage level is 20 to 40 mcg selenium/day. For pediatric patients, the suggested additive dosage level is 3 mcg/kg/day.
In adults, selenium deficiency states resulting from long term TPN support, selenium as selenomethionine or selenious acid, administered intravenously at 100 mcg/day for a period of 24 and 31 days, respectively, has been reported to reverse deficiency symptoms without toxicity. The normal whole blood range for selenium is approximately 10 to 37 mcg/100 mL.
Periodic monitoring of plasma levels of Zinc, Copper, Manganese and Selenium is suggested as a guideline for administration.
Aseptic addition of the solution to the TPN solution under laminar flow hood is recommended. The trace elements present in the solution are physically compatible with the electrolytes and vitamins usually present in the amino acid/dextrose solution used for TPN.
Parenteral drug products should be inspected visually for particulate matter and discoloration, whenever solution and container permit.