vein
Medical term Routine Blood Collections
A vessel that carries blood back toward the heart under low pressure. Superficial arm veins are the usual venipuncture sites.
Sources
Free practice questions that use vein
- Routine Blood Collections, question 8The lab rejects a hemolyzed light green-top (lithium heparin) tube. Which handling step at collection most likely caused the hemolysis?
- Special Collections, question 3A donor's blood flow is well established 40 seconds after the needle enters the vein, with the blood pressure cuff still inflated. What…
Related terms
- venipunctureEntering a vein with a needle to withdraw blood, usually at the antecubital area of the arm.
- thrombusA blood clot formed inside a vessel. A thrombosed vein feels hard or cordlike and is not used for…
- tourniquetBand tied 7 to 10 cm (3 to 4 in, about 4 to 5 finger widths) above the site to slow venous return so veins…
- tube holderPlastic barrel that holds the tube and shields the hand. It stays attached to the used needle and is…
- vasovagal reactionReflex slowing of the heart and drop in blood pressure: pale, sweaty, nauseated or dizzy, sometimes…
- vein finderA transilluminator or similar device that lights up veins under the skin to help locate a hard-to-find vein.
- venous stasisSlowed blood flow in the veins below a tourniquet. Prolonged stasis causes hemoconcentration and can alter…
- ventricleOne of the two lower heart chambers: the right pumps blood to the lungs, the left to the rest of the body.
- whole bloodBlood with its cells and plasma together, kept unclotted with an anticoagulant; used for tests such as the…