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Journal of Parenteral and Enteral Nutrition
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Cost Containment Using Cysteine HCl Acidification to Increase Calcium/ Phosphate Solubility in Hyperalimentation Solutions

Gerald L. Schmidt, PHARM.D.

Department of Pharmacy Services, Shands Hospital Inc. and Departments of Basic Dental Sciences, Food Science and Human Nutrition, Pharmaceutics, and Medicine, University of Florida, Gainesville, Florida

Thomas G. Baumgartner, PHARM.D.

Department of Pharmacy Services, Shands Hospital Inc. and Departments of Basic Dental Sciences, Food Science and Human Nutrition, Pharmaceutics, and Medicine, University of Florida, Gainesville, Florida

Werner Fischlschweiger, PH.D.

Department of Pharmacy Services, Shands Hospital Inc. and Departments of Basic Dental Sciences, Food Science and Human Nutrition, Pharmaceutics, and Medicine, University of Florida, Gainesville, Florida

Harry S. Sitren, PH.D.

Department of Pharmacy Services, Shands Hospital Inc. and Departments of Basic Dental Sciences, Food Science and Human Nutrition, Pharmaceutics, and Medicine, University of Florida, Gainesville, Florida

Kamlesh M. Thakker, PH.D.

Department of Pharmacy Services, Shands Hospital Inc. and Departments of Basic Dental Sciences, Food Science and Human Nutrition, Pharmaceutics, and Medicine, University of Florida, Gainesville, Florida

James J. Cerda, M.D.

Department of Pharmacy Services, Shands Hospital Inc. and Departments of Basic Dental Sciences, Food Science and Human Nutrition, Pharmaceutics, and Medicine, University of Florida, Gainesville, Florida

The purpose of this study was to determine if (1) the calcium/phosphate insoluble product was inversely related to pH [when cysteine HCl (CH) was added as neonatal supplementation at 0.5 mM/kg/day to hyperalimentation (HAL) solutions] and (2) the potential cost savings to the hospital. The pH of the HAL solutions was adjusted by adding various amounts of CH to the HAL solution. HAL solutions containing 27 mEq of calcium/liter and 30 mEq (15 mM) of phosphate/liter were compounded. Ten-milliliter aliquots were analyzed at 0, 12, 24, and 48 hr. All samples (n = 56) were filtered (0.22 µ), viewed with 7-10,000 x magnification scanning electron microscopy, and qualitatively analyzed with a Philips Energy Dispersive X-Ray Analysis System equipped with a SW9100 Microprocessor. Calcium/phosphate insoluble product was present in the 0-, 12-, 24-, and 48-hr samples from the CHfree solutions. The solutions containing 759 mg (4.17 mM)/ liter of CH however, remained free of precipitant. This investigation demonstrated that addition of CH to HAL can foster significant cost containment (projected $82,000/yr tangible hospital savings) by the elimination of current calcium/phosphate separation procedures for neonates on parenteral nutrition. (Journal of Parenteral and Enteral Nutrition 10:203-207, 1986)

Journal of Parenteral and Enteral Nutrition, Vol. 10, No. 2, 203-207 (1986)
DOI: 10.1177/0148607186010002203
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