AMT/RPT Practice Exam Solved 100% Correct

If a vein feels hard and thready like when palpated, then this vein may be - ANSWER-sclerosed. If the plunger on the syringe is pulled back too fast the specimen may be - ANSWER-hemolyzed When performing a heel puncture on an infant, proper technique includes - ANSWER-placing lancet flat against the skin on the medial or lateral plantar surface of heel. what condition would most likely cause hemoconcentration? - ANSWER-Dehydration. What can cause hematoma formation? - ANSWER-firmly anchoring vein in needle insertion. anticoagulant in green top tube - ANSWER-sodium heprin what is preferred method for infant blood collection? - ANSWER-capillary what tube is normally used to collect a serum sample? - ANSWER-red top correct angle for the needle to be inserted into skin? - ANSWER-30 degrees why is it necessary to wipe first drop of blood away when performing a capillary procedure? - ANSWER-to reduce interstitial fluid contamination Alcohol should be allowed to dry completely prior to skin puncture to - ANSWER-prevent lysis of red blood cells the phlebotomist places blood specimen in circles on special filter paper, for what test? - ANSWER-PKU A falsely decreased blood alcohol level may be obtained if - ANSWER-the tube is only partially filled Following venipuncture, what should be applied to venipuncture site? - ANSWER-clean sterile gauze pad When is a phlebotomist allowed to perform a venipuncture on an ankle vein? - ANSWER-When all other options have been exhausted and the physician has given approval. By bracing the hand while holding the needle assembly against the patients arm you - ANSWER-prevent excess needle movement When performing a capillary blood collection, the first drop of blood is wiped away because - ANSWER-the first drop typically has more tissue fluid What instrument may be used when trying to visualize the veins during venipuncture - ANSWER-Venoscope What is correct procedure when performing blood smear for leukocyte alkaline phosphate (LAP)? - ANSWER-Perform skin puncture, wipe away the first drop of blood & then touch slide to the next drop of blood. How long should a tourniquet be placed around a patients arm? - ANSWER-no more than one minute Hemoconcentration of a specimen can be avoided by? - ANSWER-Removing the tourniquet within one minute. A colllapsed vein will cause a - ANSWER-cessation of blood flow. Swelling caused from blood leaking from a blood vessel is - ANSWER-hematoma How far above the venipuncture site should the tourniquet be wrapped around arm? - ANSWER-3 to 4 inches What vein should be used when sample is needed from dialysis patient? - ANSWER-hand vein what is the most critically affected analyte in a hemolyzed specimen? - ANSWER-Potassium Partial penetration of the upper wall of a vein may - ANSWER-allow blood to leak into subcutaneous tissue by way of needle bevel when blood is inoculated into blood culture bottles using a butterfly apparatus which bottle is inoculated first? - ANSWER-aerobic bottle The color tube that is most frequently associated with coagulation tests is - ANSWER-light blue Which substance has a higher concentration in capillary blood than venous blood? - ANSWER-Glucose A serum or plasma specimen containing abnormally increased fatty substances from animal or vegetable origin is - ANSWER-lipemic A skin puncture is preferred over a venipuncture when the patient - ANSWER-has severe burns Prior to bandaging the puncture site the phlebotomist should - ANSWER-examine the site for bleeding. when blood collected in a syringe must be placed in evacuated tubes it is best to use - ANSWER-blood transfer device Blood smears made from EDTA specimens must be prepared within - ANSWER-1 hour of collection when patient develops syncope during a venipuncture, the phlebotomist should first - ANSWER-remove tourniquet and call for help the main reason not to use expired evacuated tubes - ANSWER-they may exhibit incomplete filling the most critical part of a blood culture collection is - ANSWER-skin antisepsis of the collection site what would trigger hematoma formation - ANSWER-removing the needle while the tourniquet still on the arm Heparin prevents clotting by - ANSWER-inactivating thrombin if a pt is critical or an antibiotic needs to be given right away, and two blood culture sets are collected - ANSWER-immediately from two different sites if additive contamination occurred from an EDTA evacuated tube, what test would potentially be affected? - ANSWER-Potassium level The anticoagulant heparin is used in tubes with tops of what color? - ANSWER-Green older patients are more prone to hematoma formation because - ANSWER-their veins have decreased elasticity donating their own blood for their own use - ANSWER-autologous donation how do you stop bleeding at a venipuncture site - ANSWER-place gauze pad over the site and hold pressure for 5-15 minutes the color coded tube that is most frequently associated with hematological tests is - ANSWER-lavender