Medical terms starting with A
45 entries
- -acPertaining to.
- -algiaPain.
- a-, an-Without, not, or lacking.
- A1CHemoglobin A1C (HbA1c): shows how high blood sugar has run, on average, over roughly the last 2 to 3 months; no…
- ab-Away from.
- ABGArterial blood gases: oxygen, carbon dioxide and pH measured in blood from an artery, such as the radial, brachial or…
- ABNAdvance Beneficiary Notice of Non-coverage: Medicare form given before a test Medicare may not pay for, so the patient…
- ABO blood groupSystem that types blood as A, B, AB or O, depending on which A and B antigens are on the red cells.
- acid citrate dextroseACD: additive in pale yellow-top tubes; WHO lists HLA tissue typing, paternity testing and DNA studies.
- ad-Toward or near.
- additiveAnything put in a collection tube on purpose, such as an anticoagulant, clot activator, separator gel or preservative…
- adulterated specimenA drug-test specimen containing a substance not normally found in urine, or an abnormal amount of a natural one…
- advance directiveA legal document, such as a living will or health care power of attorney, stating care wishes for when the patient…
- AEDAutomated external defibrillator: portable unit that checks the heart rhythm through chest pads and tells the rescuer…
- aerobic bottleBlood culture bottle whose medium supports organisms that grow with oxygen; paired with an anaerobic bottle in a set.
- AIDSAcquired immunodeficiency syndrome: late-stage HIV disease, when the immune system is badly weakened. HIV spreads…
- airborne precautionsUsed for TB, measles or chickenpox: a negative-pressure isolation room (AIIR) and a fit-tested N95 or better…
- airborne transmissionSpread by droplet nuclei (under about 5 micrometers) that stay suspended in air, as with tuberculosis, measles and…
- alcohol-based hand rubHand sanitizer with at least 60% alcohol, rubbed over all hand surfaces until dry (about 20 to 30 seconds).
- aliquotA portion of serum, plasma or urine transferred from the original tube into a labeled secondary tube, so several tests…
- ALT, ASTAlanine aminotransferase and aspartate aminotransferase: enzymes released when liver cells are damaged; both are part…
- ambi-Both or both sides.
- anaerobic bottleBlood culture bottle whose medium supports organisms that grow without oxygen; paired with an aerobic bottle in a set.
- analytical phaseThe testing step itself, when the instrument or test system measures the specimen.
- anchoringHolding the skin taut with the thumb below the site, pulling toward the hand, so the vein stays still as the needle…
- anemiaToo few red cells or too little hemoglobin, lowering oxygen delivery. Repeated blood draws can contribute, especially…
- angi/oBlood vessel.
- ante-Before or in front of.
- antecubital fossaThe hollow at the front of the elbow where the median cubital, cephalic and basilic veins lie; the main venipuncture…
- anti-Against or opposing.
- antibodyA protein the immune system makes against a specific antigen. Antibodies against foreign red-cell antigens are why…
- anticoagulantPrevents clotting: tube additives like EDTA, citrate and heparin, and blood thinners like warfarin, which make…
- antigenA marker the immune system recognizes. Red-cell antigens such as A, B and the Rh factor decide a person's blood type.
- antisepticA germ-killing agent for skin and living tissue, such as 70% isopropyl alcohol for routine venipuncture; disinfectants…
- aort/oAorta, the largest artery.
- apheresisCollection in which blood is drawn, one part such as plasma or platelets is separated and kept, and the rest is…
- arteri/oArtery.
- arterial punctureInserting a needle into an artery, such as the radial artery, to collect arterial blood, mainly for blood gases…
- arteriovenous fistulaA surgical joining of an artery and a vein, usually in the arm, for hemodialysis. That arm is never used for…
- arteriovenous graftA soft tube joining an artery and a vein under the skin for hemodialysis access; that arm is not used for draws.
- arteryA vessel carrying blood away from the heart under high pressure. It pulses when palpated, which helps the phlebotomist…
- ather/oFatty plaque or deposit.
- atriumAn upper heart chamber. The right one collects blood coming back from the body; the left one collects oxygen-rich…
- auto-Self.
- autologous donationBlood a person donates for their own later use. FDA allows a lower hemoglobin minimum for autologous donors (11.0 g/dL).