Viewers learn how to identify which patients are at greatest risk for developing life-threatening imbalances. They learn about homeostasis, normal fluid intake and output, the roles of sodium and potassium, the sodium-potassium pump, blood osmolarity, physiologic responses, Starling's forces, hypokalemia, hyperkalemia, hypercalcemia, dehydration, SIADH, and diabetes insipidus. A comprehensive 96-page workbook accompanies the video, and a self-test helps viewers measure how much they've learned.