Terms
What is the slanted edge at the tip of the needle?
bevel
What is the gauge most commonly used for adult venipuncture?
20- to 21-gauge needle
time frame a tourniquet should be left on a patient's arm
1 minute
Which tube contains EDTA to prevent clotting; used for hematology tests such as CBC?
lavender-topped tubes
Which tube contains thixotropic gel?
plasma separator tube (PST); green-gray (marbled) top and light green top
What is the increased concentration of blood cells in proportion to plasma called?
hemoconcentration
What is the gauge most commonly used in infants and the elderly?
23 gauge needle
time frame blood clots at room temp without a clot activator
30 to 60 minutes
Which tube contains no additives; used for serology and chemistry studies?
glass plain red-topped tubes
What is the tube top color for collection of a coagulation test?
light blue
What is the liquid part of whole blood that provides the medium for blood cells and dissolved particles to be carried through the bloodstream?
plasma
What is used when there is concern that the strong vacuum in a stoppered tube may collapse the vein?
syringes
the angle at which the needle enters the arm
15-degree angle
Which tube top for collection of a prothrombin test?
light blue
What is the major cause of specimen rejection?
hemolysis
What is also known as winged infusion set?
butterfly needles
What are the most common phlebotomy site(s) in adults?
veins in the antecubital space
Which tube top for collection for chemistry tests?
green
What is the liquid portion of the blood that does not contain clotting factors?
serum
What is used to test neonates for certain metabolic disorders?
Guthrie card
What is the correct method for performing a capillary puncture?
wipe away the first drop of blood and then collect the sample
Which tube top for collection of serum tests?
chemistry studies, and immunology, red-gray marbled