NHA Phlebotomy Practice Test| QUESTIONS WITH ALL ANSWERS CORRECT

A term used to describe a blood sample in which the red blood cells have ruptured is: Correct Answer: Hemolyzed Which of the following Vacutainer tubes is routinely used for hematology testing? Correct Answer: Lavender No anticoagulants are found in which tube? Correct Answer: Plain Red Which type of tube should be used to collect blood specimens during a glucose tolerance test? Correct Answer: Gray What is the anticoagulant that prevents platelets from clumping and preserves the appearance of blood cells for microscopic preparation? Correct Answer: EDTA( Ethylenediamine tetraacetic acid) What is the name of the slant at the open end of a needle used for venipuncture? Correct Answer: Bevel What is the most commonly used needle size for an adult venipuncture? Correct Answer: 21 guage What is the most commonly used needle size for an infant and the elderly? Correct Answer: 23 guage How long should a tourniquet remain tied on a patient's arm? Correct Answer: No longer than 1 minute Without a clot activator, whole blood typically clots in how many minutes? Correct Answer: 30-60 min. Thixotropic gel, found in the SST Tiger top tube is characterized as being: Correct Answer: 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? Correct Answer: Light blue, red, lavender What is the correct tube for a typical hematology test (CBC)? Correct Answer: Lavender What happens when you leave a tourniquet tied on a patient's arm for longer than the recommended time? Correct Answer: Hemoconcentration