Blood Collection Techniques
Why are gauze pads rather than cotton balls considered a better choice for covering the site while holding pressure following venipuncture? - Answer- cotton fibers tend to stick to the site
The evacuated tube system requires - Answer- an evacuated sample tube, a p...
Blood Collection Techniques
Why are gauze pads rather than cotton balls considered a better choice for covering
the site while holding pressure following venipuncture? - Answer- cotton fibers tend
to stick to the site
The evacuated tube system requires - Answer- an evacuated sample tube, a plastic
adapter, and a double-pointed needle
Identify the tubes needed to collect a complete blood count (CBC), partial
thromboplastin time (PTT), and STAT potassium by color and in the proper order of
collection for a multi-tube draw - Answer- light blue top, green top, lavender top
An acceptable blood smear - Answer- has a feathered uniform edge
For newborns, the penetration depth of lancets for blood collection must be -
Answer- 2.4 mm or less
Blood collected in a red stopper tube - Answer- yields serum and clotted red cells
Which of the following is a commonly used intravenous device that is sometimes
used in the collection of blood from patients who are difficult to collect blood by
conventional methods? - Answer- butterfly needle
All of the following tube stopper colors indicate the presence (or absence) and type
of additive in the tube EXCEPT - Answer- royal blue
Proper finger puncture technique includes all of the following EXCEPT - Answer-
puncture parallel to the whirls of the fingerprint
Which of the following procedures does NOT require cleansing the blood collection
site with providone-iodine solution? - Answer- therapeutic drug monitoring collection
What do you do if the patient's physician is in the room and the specimen is ordered
STAT? - Answer- politely introduce yourself, explain why you are there, and ask
permission to proceed
In which instance is needle recapping recommended? - Answer- recapping is
NEVER recommended procedure
The following test have all been ordered at the same time on different inpatients.
There is only one phlebotomist on duty. Which test should the phlebotomist collect
first? - Answer- STAT electrolytes in the emergency room (ER)
You need to collect blood cultures, a gray top, and a lavender top on an adult with
difficult veins. Which specimens can be collected by skin puncture? - Answer- gray
top and lavender top only
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