Semantics as a field of study also has significant ties to various representational theories of meaning including truth theories of meaning, coherence theories of meaning, and correspondence theories of meaning. Each of these is related to the general philosophical study of reality and the representation of meaning.
packed-cell volume (PCV) hematocrit. plasma volume the total volume of blood plasma, i.e., the extracellular fluid volume of the vascular space; see also blood volume. red cell volume the total volume of red cells in the body; see also blood volume.
A peripheral intravenous (PIV) line is a small hollow tube that is inserted into a vein. This intravenous line can then be connected to special tubing. Medications, fluids, and blood can be administered directly into the vein through the peripheral intravenous line. There are several types of peripheral intravenous lines.