What is thrombosis?

Thrombosis is defined as the formation of a blood clot within a blood vessel, which can impede blood flow. This condition can occur in arteries or veins and may lead to serious health complications, including heart attacks or strokes if the clot obstructs blood flow to critical areas. Understanding thrombosis is essential for phlebotomy professionals, as it can influence the choice of venipuncture sites and highlight potential risks for patients, such as those with a history of clotting disorders. The other options describe different concepts that do not relate specifically to the formation of blood clots. A blood test measures various components of blood but does not refer to clot formation, while measuring blood pressure is unrelated to clotting issues. Procedures for removing blood, such as phlebotomy itself, also do not pertain directly to thrombosis. Thus, the definition of thrombosis as a condition where blood clots form is essential knowledge in understanding both the risks associated with blood collection and the underlying health conditions that may affect patients.