Questions and Answers
Which of the following is classified as a disinfectant?
A tube with a green stopper normally contains?
heparin
The purpose of an antiglycolytic agent is to?
preserve glucose
The tube additive that is responsible for the most carryover problems is?
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Heparin prevents blood from clotting by?
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Which of the following substances is a biocide? (Select all that apply)
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The solution normally used to clean the site before routine venipuncture is?
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In the correct order of draw for a routine hematology test, a coagulation test, and a stat chemistry test, which tubes would you use?
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Glass particles present in serum separator tubes?
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When nitrile or vinyl strap tourniquets become soiled with blood, it is best to?
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Which needle gauge has the largest lumen?
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When using a winged infusion blood collection set, if the first tube is an additive tube, it is important to collect a few milliliters of blood into a nonadditive tube first to?
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Which additive is usually present in a tube with a lavender stopper?
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What is the proper blood-to-additive ratio for a light-tube collected for a coagulation test?
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A rapid serum tube contains?
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The slanted tip of the needle that enters the vein is called the?
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A phlebotomist collects a light-blue-top, lavender-top, and gray-top tube from an inpatient. Respectively, which additives do the tubes most likely contain?
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The tests performed in the following department are typically collected in a tube with a light-blue stopper?
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According to CLSI standards, which of the tubes listed below is filled last when using a syringe?
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What is the most important factor in choosing which gauge needle to use for venipuncture?
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Study Notes
Disinfectants and Biocides
- Sodium hypochlorite is classified as a disinfectant.
- Biocides include hydrogen peroxide, isopropyl alcohol, and povidone iodine.
Tubes and Additives
- A green stopper tube contains heparin.
- Light-blue-top, green-top, and purple-top tubes are used in that order for hematology, coagulation, and stat chemistry tests.
- Lavender stopper tubes typically contain the additive EDTA, which prevents blood from clotting.
- Light-blue tubes are used for coagulation tests, containing citrate as an additive.
- Gray-top tubes contain sodium fluoride as an additive.
Blood Collection Techniques
- Antiglycolytic agents preserve glucose levels in blood samples.
- Ethylenediaminetetraacetic acid (EDTA) is responsible for most carryover problems in blood collection.
- Using a winged infusion set requires collecting a few milliliters of blood into a nonadditive tube first to maintain the proper blood-to-additive ratio.
- The proper blood-to-additive ratio for light-blue tubes in coagulation tests is 9:1.
Needles and Equipment
- The needle gauge with the largest lumen is 18.
- The bevel is the slanted tip of the needle that enters the vein.
- For contaminated nitrile or vinyl strap tourniquets, disposal is the best option.
Blood Collection Strategies
- Glass particles in serum separator tubes enhance clotting.
- Rapid serum tubes contain thrombin to facilitate faster clotting.
- The size and condition of the vein is the most important factor in choosing needle gauge for venipuncture.
CLSI Standards
- According to CLSI standards, notable tubes to fill last when using a syringe include those with EDTA.
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Description
Test your knowledge on disinfectants, blood collection tubes, and techniques used in clinical laboratories. This quiz covers important additives and their uses, classifications of disinfectants, and proper blood sampling methods. Perfect for students and professionals in the healthcare field.
