Total parenteral nutrition (TPN) is administered through a central venous catheter, which is inserted into a large vein in the chest, neck, or arm. The TPN solution, containing a mixture of essential nutrients, vitamins, minerals, and electrolytes, is then infused directly into the bloodstream through the catheter. The infusion rate and composition of the TPN solution are carefully monitored and adjusted by healthcare providers to meet the individual nutritional needs of the patient.
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