CPT® Code 85810

The CPT® Code 85810 refers to the procedure of measuring blood viscosity, which is a critical assessment in understanding the flow characteristics of blood within the circulatory system. Viscosity, in a general sense, is a measure of a fluid's resistance to flow when subjected to a shearing force. In the context of blood, viscosity specifically pertains to the internal friction that occurs between the blood itself and the walls of the blood vessels. This property is influenced by several factors, including hematocrit levels, temperature, and the rate of blood flow. Testing for blood viscosity is particularly important in patients who may be suffering from various cardiac or hematological conditions. For instance, individuals with ischemic heart disease, stroke, sickle cell anemia, or polycythemia may experience increased blood viscosity, which can lead to serious health complications. The viscosity test can be conducted on either whole blood or serum, utilizing a specialized instrument known as a cone-plate viscometer. This device allows for precise measurement of viscosity, providing valuable information that can aid in the diagnosis and management of these conditions.