Rh factor
Medical term Routine Blood Collections
Red-cell antigen tested with the ABO type: people who have it are Rh-positive; those who lack it are Rh-negative.
Related terms
- antigenA marker the immune system recognizes. Red-cell antigens such as A, B and the Rh factor decide a person's…
- prolonged bleedingBleeding at the puncture site past about 5 minutes; keep pressing, never bandage over active bleeding, and…
- pulmonary circulationBlood flow from the right ventricle through the lungs, where it picks up oxygen, and back to the left atrium.
- pulseThe throb of an artery with each heartbeat. A pulse under the fingertip means an artery is there; do not…
- refluxBackflow of tube contents into the vein; keeping the arm angled downward while tubes fill prevents it.
- rolling veinA vein that slides away from the needle; anchoring the skin taut below the site holds it in place.
- sclerosed veinA hardened, cordlike vein, often from damage or clotting; it does not spring back when pressed and is not…
- serumThe liquid left after blood clots and is centrifuged; it lacks the clotting factors used up in the clot…
- serum separator tubeGold or red-gray (tiger) top. Its clot activator speeds clotting; when the tube is spun, its gel moves to…
Study Routine Blood Collections