77 Questions
What is the purpose of the sleeve on a multisample needle?
To prevent blood from leaking onto the adapter or tube holder
What is a key advantage of using a syringe over a multisample needle for venipuncture?
Syringes allow for a more controlled and gentle vacuum, which is better for fragile veins
What is the most common size of syringe needle used for venipuncture?
21 gauge, 1 inch long
What is the purpose of the double-ended needle used in venipuncture?
To enable the needle to penetrate both the patient's skin and the rubber cap of the collection tube
What is the purpose of the needle remaining in the patient's vein while one tube is replaced with another?
To allow for the collection of multiple samples without additional venipunctures
Which of the following is NOT a recommended practice when inspecting a new needle package?
Open the package and test the sharpness of the needle on your finger
What is the primary function of the bevel on a phlebotomy needle?
It prevents the needle from coring out a plug of tissue
Which factor should NOT influence the choice of needle length for venipuncture?
The patient's body mass index (BMI)
What is the purpose of the hub on a phlebotomy needle?
It connects the needle to the evacuated collection tube
Which term refers to the hollow interior of a phlebotomy needle?
Lumen
What is the primary purpose of the OSHA directive issued in November 2000?
To increase the use of safety devices to reduce the number of sharps injuries
Which of the following needle safety features is described in the text?
Needles with automatic needle retraction
Which healthcare worker is most at risk for accidental needle sticks?
Phlebotomists
What is the purpose of the Vacutainer Push Button Blood Collection Set described in the text?
To automatically retract the needle from the vein after blood collection
What is the estimated number of accidental needle sticks that occur per day nationwide?
1000
What is the primary purpose of a winged infusion set or butterfly needle?
To collect blood samples from small or fragile veins
What is a key feature of many modern butterfly needles?
They are designed with a built-in safety shield or sheath
Which gauge is commonly used for butterfly needles?
23 gauge
What is the recommended method for disposing of used butterfly needles?
Place them in a puncture-resistant sharps container
How can a butterfly needle be connected to an evacuated collection tube?
Using a Luer adapter or connector
What is the primary reason needles must be disposed of immediately after use?
To avoid accidental needle sticks
Which of the following is a requirement for a biohazard disposal container?
The container must be leak-proof and puncture-resistant
What is the purpose of the prescribed order of draw when collecting multiple blood samples?
To minimize the effects of contamination among the tubes
Which of the following is a key consideration when selecting a needle for a venipuncture procedure?
The size of the patient's vein
What is the primary purpose of a needle adapter or tube holder in a phlebotomy tray?
To attach the needle to the evacuated collection tube
What does the gauge of a needle describe?
The diameter of the needle's lumen
In phlebotomy, why might some phlebotomists prefer a shorter needle?
It makes patients less uneasy
Why are larger-diameter needles like 21 to 22 gauge used in phlebotomy?
They deliver blood more quickly
What is a disadvantage of using smaller-gauge needles like 23 gauge in phlebotomy?
They result in hemolyzed blood cells
Why is learning the most appropriate gauge for each clinical situation important for a phlebotomist?
To prevent damage to tissue during collection
What is the primary purpose of using a needle adapter during venipuncture?
To provide a stable connection between the needle and evacuated tube
Why is it important to choose the correct size of needle adapter for the evacuated tube being used?
To accommodate tubes of different diameters and maintain a secure fit
What feature on the needle adapter indicates how far the evacuated tube can be advanced without losing its vacuum?
The tube advancement mark
Which statement about evacuated collection tubes is true?
They are color-coded for easy identification
What is the purpose of using a multisample needle during venipuncture?
To allow for the collection of multiple samples from a single venipuncture
Which of the following statements about needle adapters is false?
They are opaque to prevent light exposure during collection
What is a potential advantage of using a winged infusion set during venipuncture?
It reduces the risk of needle stick injuries
Which of the following is not a feature of a multisample needle?
It is color-coded for easy identification
What is the purpose of the tube advancement mark on a needle adapter?
To prevent the tube from being pushed too far into the adapter
Which statement about evacuated collection tubes is false?
They are all the same size, regardless of the manufacturer
What is the primary advantage of using a syringe over a multisample needle for venipuncture?
Syringes allow for a more controlled and gentle vacuum, which is better for fragile veins.
What is the primary purpose of the retractable rubber sleeve on a multisample needle?
To cover the second tip of the needle when it is not inserted into a tube.
What is the most common size of syringe needle used for venipuncture, according to the text?
22 gauge, 1 inch long
What is the primary purpose of the needle adapter or tube holder in a phlebotomy tray?
To provide a secure connection between the needle and the collection tube.
What is the main function of the double-ended needle used in venipuncture?
To allow for the collection of multiple blood samples without changing needles.
What is the primary purpose of the tube advancement mark on a needle adapter?
To indicate the maximum depth the evacuated tube should be inserted.
What is the primary reason that needles must be disposed of immediately after use in phlebotomy?
To comply with OSHA regulations for sharps disposal.
What antiseptic should not be used routinely due to its interference with some chemistry test results?
Povidone-iodine solution
Why is using cotton balls instead of gauze not recommended for stopping bleeding after drawing blood?
They can get trapped in the clot and tear it when pulled off the puncture site.
Why should Chlorhexidine gluconate not be used on infants younger than 2 months?
The infants' skin is too delicate for this antiseptic.
What is the primary danger of fanning or blowing on a puncture site to speed drying?
It introduces more bacteria to the site.
What makes Coban a good alternative for patients with sensitive or fragile skin?
It sticks only to itself, not to skin.
What is the primary reason for not using Chlorhexidine gluconate on patients sensitive to iodine?
Patients sensitive to iodine may have adverse reactions to Chlorhexidine.
Why should you not fan or blow on a site to speed drying after drawing blood?
It may increase the risk of contamination.
What is the primary purpose of using a blood pressure cuff as a tourniquet during phlebotomy?
To temporarily increase blood flow and make veins more visible
What is the purpose of using a device that shines a bright light through the patient's skin during phlebotomy?
To make the veins visible as dark lines within the tissue
Which statement about antiseptics and disinfectants is true?
Antiseptics are used to clean living tissue, while disinfectants are used to clean surfaces
What is the most commonly used antiseptic for cleaning the patient's skin before venipuncture?
70% isopropyl alcohol (rubbing alcohol)
What property does isopropyl alcohol have that makes it effective as an antiseptic?
It is bacteriostatic, meaning it inhibits the growth or reproduction of bacteria
For maximal effectiveness, how long should the antiseptic be left in contact with the skin before venipuncture?
30 to 60 seconds
What is the purpose of using an antiseptic to clean the patient's skin before venipuncture?
To prevent contamination by normal skin bacteria
What organization published the document 'Procedures for the collection of diagnostic blood specimens by venipuncture'?
Clinical and Laboratory Standards Institute
Which publication discusses the safety of chlorhexidine gluconate used for skin antisepsis in preterm infants?
J Perinatol
In the context of blood specimen collection, what does CLSI stand for?
Clinical and Laboratory Standards Institute
Which document discusses the tubes and additives for venous and capillary blood specimen collection?
Clinical and Laboratory Standards Institute
Which publication includes a comparison of four antiseptic preparations for skin in the prevention of contamination of percutaneously drawn blood cultures?
J Clin Microbiol
What is the subject of the document with the code GP41-A6 (formerly H03-A6)?
Procedures for the collection of diagnostic blood specimens by venipuncture
Which organization holds the copyright to documents related to blood specimen collection?
Elsevier Inc
'Safety of chlorhexidine gluconate used for skin antisepsis in the preterm infant' was published in which journal?
J Perinatol
'Comparison of four antiseptic preparations for skin in the prevention of contamination of percutaneously drawn blood cultures' is a study published in which year?
'Comparison of four antiseptic preparations for skin in the prevention of contamination of percutaneously drawn blood cultures'
Why are lavender-topped tubes drawn near the end of the blood collection process?
To prevent falsely high calcium readings.
Which tube should be drawn first according to the order discussed in the text?
Red-gray (gold BD Hemogard) tube
Why is the gray-topped tube usually drawn last in blood collection?
To minimize falsely high potassium measurements.
What is the purpose of drawing green tubes after red-gray and gold-topped tubes?
To minimize interference with EDTA-containing tubes.
Why may some healthcare institutions allow drawing the glass red-topped tube after the sterile tube?
To minimize interference with EDTA-containing tubes.
In what way does the heparin in green tubes differ from EDTA?
It is less likely to interfere with EDTA-containing tubes.
Why should sodium fluoride be avoided in blood collection for electrolyte analysis?
It may damage cell membranes.
Test your knowledge of routine venipuncture procedures, including selecting the right needle and tube for blood collection. Learn about the importance of using sterile, disposable needles in phlebotomy practice. Practice inspecting needle packages for integrity before use.
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