hematoma

Medical term Routine Blood Collections

Swelling from blood leaking into tissue at the puncture, for example when the needle goes through the vein or the arm is bent afterward.

Sources

Related terms

veinA vessel that carries blood back toward the heart under low pressure. Superficial arm veins are the usual…
formed elementsThe solid part of blood: red cells, white cells and platelets (cell fragments), suspended in the liquid…
gaugeThe number for a needle's bore: the higher the gauge, the thinner the needle. A 21-gauge needle is typical…
glycolytic inhibitorAdditive, most often sodium fluoride in gray-top tubes, that keeps cells from consuming glucose after…
heel stickCapillary puncture on the medial or lateral plantar surface of an infant's heel, used from birth to about 6…
hemoconcentrationRise in cell and protein concentration when plasma water leaves the vein, as with a tourniquet left on too…
hemoglobinIron-based protein packed inside red cells; it picks up oxygen in the lungs, releases it to tissues and…
hemolysisRupture of red cells that releases hemoglobin and potassium into serum or plasma, tinting it pink to red and…
hemostasisThe body's process for stopping bleeding: the vessel narrows, platelets form a plug, then coagulation builds…