This page discusses polycythemia, a condition characterized by an increased number of red blood cells (RBCs), leading to higher blood viscosity and associated complications. It outlines the pathophysi...This page discusses polycythemia, a condition characterized by an increased number of red blood cells (RBCs), leading to higher blood viscosity and associated complications. It outlines the pathophysiology, distinguishing between primary (genetic) and secondary (caused by other conditions) polycythemia, the diagnostic techniques, clinical manifestations, and nursing care strategies. Key nursing responsibilities include monitoring symptoms, educating patients, and evaluating treatment efficacy.