PTCB Pharmacy Technician Certification Exam (PTCE) Practice Test

In total parenteral nutrition, the foundation of the admixture is the macronutrient solution that provides nitrogen and energy. Amino acids supply the nitrogen necessary for body protein synthesis, while dextrose provides the primary source of carbohydrate calories. Together, they form the base of the PN solution. Lipids are added for additional calories and essential fatty acids, but they are usually included separately from the base. Vitamins, minerals, and electrolytes are crucial micronutrients added as needed, and water serves as the solvent to carry everything in solution.