NHA Phlebotomy Practice Test with question and answers rated A+

NHA Phlebotomy Practice Test with question and answers rated A+A term used to describe a blood sample in which the red blood cells have ruptured is: Hemolyzed Which of the following Vacutainer tubes is routinely used for hematology testing? Lavender No anticoagulants are found in which tube? Plain Red Which type of tube should be used to collect blood specimens during a glucose tolerance test? Gray What is the anticoagulant that prevents platelets from clumping and preserves the appearance of blood cells for microscopic preparation? EDTA( Ethylenediamine tetraacetic acid) What is the name of the slant at the open end of a needle used for venipuncture? Bevel What is the most commonly used needle size for an adult venipuncture? 21 guage What is the most commonly used needle size for an infant and the elderly? 23 guage How long should a tourniquet remain tied on a patient's arm? No longer than 1 minute Without a clot activator, whole blood typically clots in how many minutes? 30-60 min. Thixotropic gel, found in the SST Tiger top tube is characterized as being: less dense than red blood cells but more dense than serum What is the proper order for collection of a blood specimen for hematology testing, serum chemistry testing, and coagulation studies? Light blue, red, lavender What is the correct tube for a typical hematology test (CBC)? Lavender What happens when you leave a tourniquet tied on a patient's arm for longer than the recommended time? Hemoconcentration What is the site cleaned with before performing a venipuncture or capillary puncture? Isopropyl Alcohol What angle do you position the needle to perform a routine venipuncture? 15 degrees When is the correct time to remove the tourniquet during a venipuncture? As the last tube to be drawn begins to fill What is a winged infusion set also known by? Butterfly What is a hematoma caused by? Excessive probing to locate a vein, failure to insert the needle far enough into the vein, penetration of the needle through a vein. What is the most common phlebotomy site in adults? veins in the antecubital space What is the clear part of whole blood that contains clotting agents? Plasma