Chapter 48 Flashcards
(9 cards)
The first step in collecting blood is?
review the written request
What is the purpose of the color-coded blood collection tube stoppers?
they indicate what additives are found in each tube
The procedure by which blood is withdrawn from a vein is called?
venipuncture
Leaving the tourniquet on the arm for an extended period of time will cause what?
hemoconcentration
Capillary puncture is used when?
when you only need a very small amount of blood
When performing a venipuncture, the needle should be inserted how?
at a 15-degree angle, bevel up, parallel to the vein
What is the correct position of the torniquet when using an evacuated tube system?
midway between the elbow and the shoulder
When a capillary puncture is centrifuged for a hematocrit reading what are the three layers the blood will separate into?
red blood cells, buffy coat, and plasma
What test requires a blood collection tube with a grey stopper?
blood glucose test
