Study Questions C8

Question 1

Which of the following needles has the smallest
diameter?
a. 16-gauge needle
b. 22-gauge needle
c. 21-gauge needle
d. 23-gauge needle

Answer 1

d. 23-gauge needle

Question 2

Which of the following tubes contains an anticoagulant that inhibits thrombin?
a. lavender stopper
b. white stopper
c. light blue stopper
d. green stopper

Answer 2

d. green stopper

Question 3

EDTA, sodium citrate, and potassium oxalate
anticoagulants prevent blood clotting in blood
collection tubes by:
a. binding calcium
b. binding fibrinogen
c. acting as an antithrombin agent
d. releasing heparin

Answer 3

a. binding calcium

Question 4

All of the following can be used to collect a
serum specimen EXCEPT:
a. red stopper tube
b. PST
c. SST
d. orange stopper tube

Answer 4

b. PST

Question 5

Which tube additive preserves glucose?
a. sodium citrate
b. sodium heparin
c. sodium polyanethol sulfonate
d. sodium fluoride

Answer 5

d. sodium fluoride

Question 6

The stopper colored tube that must always be
filled to the correct ratio is:
a. light blue stopper tube
b. light green PST
c. gold SST
d. tan stopper tube

Answer 6

a. light blue stopper tube

Question 7

Which of the following is the CLSI acceptable order of tube draw?
a. light blue, light green, and lavender
b. red, light blue, and lavender
c. lavender, red, and yellow
d. yellow, green, and light blue

Answer 7

a. light blue, light green, and lavender

Question 8

The winged blood collection set is primarily
used for:
a. heel sticks
b. large antecubital veins
c. finger sticks
d. difficult and hand veins

Answer 8

d. difficult and hand veins

Question 9

The primary antiseptic for routine venipuncture is:
a. iodine
b. chlorhexidine gluconate
c. isopropyl alcohol
d. Betadine

Answer 9

d. Betadine

Question 10

Using evacuated tubes past their expiration date
may result in:
a. clotted samples
b. incompletely filled tubes
c. insecure gel barriers
d. all of the above

Answer 10

d. all of the above