AMT/RPT Practice Exam

AMT/RPT Practice Exam If a vein feels hard and thready like when palpated, then this vein may be - sclerosed. If the plunger on the syringe is pulled back too fast the specimen may be - hemolyzed When performing a heel puncture on an infant, proper technique includes - placing lancet flat against the skin on the medial or lateral plantar surface of heel. what condition would most likely cause hemoconcentration? - Dehydration. What can cause hematoma formation? - firmly anchoring vein in needle insertion. anticoagulant in green top tube - sodium heprin what is preferred method for infant blood collection? - capillary what tube is normally used to collect a serum sample? - red top correct angle for the needle to be inserted into skin? - 30 degrees why is it necessary to wipe first drop of blood away when performing a capillary procedure? - to reduce interstitial fluid contamination Alcohol should be allowed to dry completely prior to skin puncture to - prevent lysis of red blood cells the phlebotomist places blood specimen in circles on special filter paper, for what test? - PKU A falsely decreased blood alcohol level may be obtained if - the tube is only partially filled Following venipuncture, what should be applied to venipuncture site? - clean sterile gauze pad When is a phlebotomist allowed to perform a venipuncture on an ankle vein? - 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 - prevent excess needle movement When performing a capillary blood collection, the first drop of blood is wiped away because - the first drop typically has more tissue fluid What instrument may be used when trying to visualize the veins during venipuncture - Venoscope What is correct procedure when performing blood smear for leukocyte alkaline phosphate (LAP)? - 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? - no more than one minute Hemoconcentration of a specimen can be avoided by? - Removing the tourniquet within one minute. A colllapsed vein will cause a - cessation of blood flow. Swelling caused from blood leaking from a blood vessel is - hematoma How far above the venipuncture site should the tourniquet be wrapped around arm? - 3 to 4 inches What vein should be used when sample is needed from dialysis patient? - hand vein