Venipuncture Flashcards
Out of the following tubes, green, light blue,lavender, or red are routinely used for hematology testing?
Lavender
Which type of tube should be used to collect blood specimens during a blood glucose tolerance test?
Grey
No anticoagulants are found in which of the following tubes?
Red
What anticoagulant prevents platelets from clumping and preserves the appearance of blood for microscopic prep?
EDTA
The slant at the open end of the needle used for venipuncture is called?
The bevel
What needle size is most commonly used for venipuncture?
20
What about the most commonly used needle at a blood bank?
16
The needle size most commonly used in infants and elederly?
23
Tourniquet should be tied on arm no longer than?
1 minute
Without a clot activator blood clots within what time frame?
15 to 16 minutes
You are required to collect a blood sample for a cbc, which tube would you collect?
Lavender
The laboratory requisition indicated you are to collect venous blood specimen for testing serum chemistry testing and coagulation studies, what is the proper order of collection for these tubes?
Light blue, red, lavender
So a syringe is preferred over a vacutainer collection when?
Fragile veins
Leaving a tourniquet on an arm over the recommended time can cause?
Hemoconcentration
Before a routine venipuncture or capillary puncture what do you clean the site with?
Isopropyl alcohol
In a routine venipuncture what angle should the needle enter the arm?
15 degree
Winged infusion set is also known as?
Butterfly needle
Why should a tourniquet not be tied too tightly?
Impeades arterial blood flow
A needlestick is most likely to occur if the phlebotomist does what?
Attempts to recap a needle
A hematoma can be caused by?
All the the above
Blood obtained via capillary puncture can be obtained in?
All of the above
The device used for a dermal puncture is?
Lancet
Most common site for adults are ?
antecubital
The proper venipuncture tube for collection of a serum specimen(select all that apply)?
Red and grey
What is the correct method for performing a capillary puncture?
Wipe away the first drop of blood then collect the sample
Which is the proper technique for performing a venipuncture?
Bevel is up,needle goes in at a 15 degree angle
The liquid portion of whole blood that contains clotting factors?
Plasma
Which of the following cleansing agents may be used at the venipuncture site to remove infection causing bacteria?
All of the above
If samples for more than one tube must be drawn, which order listed below follows the clisi standards?
Yellow, red, green
What is the major cause of specimen rejection?
hemolysis
Which of the following collection containers are used to treat neonates for certain metabolic disorders?
Guthrie cards
In adults and children which finger is most likely used?
Ring finger
The vacutainer tube with a marble gray top uses particles to enhance clotting,in a thyrotropic gel to assist in serum and blood cells.
True
The smaller gauge number the larger the lumen of the needle.
True
The smaller gauge of the venipuncture needle the less likely it is of hemolysis blood cells will occur.
True
If your patient faints while having blood draw they must remain in the facility for 15 mins and should not drive for at least 30 mins.
True
If you’re drawing blood on a elderly patient with a history of collapsed veins you should collect with a syringe.
True
If a patient complains of tingling and numbness during a venipuncture you should continue to draw.
False
If blood is flowing into the vacutainer to slowly you should withdraw the needle slightly.
True
All vacutainer tubes should be inverted 3 to 5 times to mix the blood sample additive.
False
