... level. Cardiac patients, and many severely stressed patients, often benefit from fluid and sodium restriction to levels of 1000 mL of total parenteral nutrition (TPN) formula and 5–20 meq of sodium ... crystalline amino acids (70 g) and 21% dextrose (210 g), which provides an amount of nitrogen and glucose that is effective at protein-sparing. Table 73-3 Enteric Fluid Volumes and Their Electrolyte ... weight loss and tissue wasting, TPN must be instituted gradually because of the profound antinatriuresis, antidiuresis, and intracellular accumulation of potassium, magnesium, and phosphorus....