Pharmacology: Albuminar-25 is active osmotically and is therefore important in regulating the volume of circulating blood. When injected intravenously, 50 mL of 25% albumin draws approximately 175 mL of additional fluid into the circulation within 15 minutes, except in the presence of marked dehydration. This extra fluid reduces hemoconcentration and blood viscosity. The degree of volume expansion is dependent on the initial blood volume. When the circulating blood volume has been depleted, the hemodilution following albumin administration persists for many hours. In individuals with normal blood volume, it usually lasts only a few hours.
Albumin, unlike whole blood or plasma, is considered free of the danger of homologous serum hepatitis. Albuminar-25 may be given in conjunction with other parenteral fluids such as saline, dextrose or sodium lactate. It is convenient to use since no cross-matching is required and the absence of cellular elements removes the danger of sensitization with repeated infusions.