chapt 8

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 antico- agulant 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

Theprimaryantisepticforroutinevenipunctureis: a. iodine
b. chlorhexidine gluconate c. isopropyl alcohol
d. Betadine

Answer 9

c. isopropyl alcohol

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