Which of the following scenarios represents correct capillary puncture technique?

A) Puncturing perpendicular to the fingerprint whorls

B) Scooping up blood that is running down the finger

C) Using povidone-iodine to clean the heel of an infant

D) Wiping the alcohol dry so the puncture doesn't sting

Answer: Puncturing perpendicular to the fingerprint whorls

Capillary punctures that are deeper than recommended are more painful because pain fibers increase in abundance below

A) 0.5 mm

B) 1.2 mm

C) 1.5 mm

D) 2.4 mm

Answer: 2.4 mm

What causes a microhematocrit tube to fill with blood?

A) Capillary action

B) The pull of the gravity

C) Vacuum suction

D) All of the options are correct

Answer: Capillary action

It is necessary to control depth of lancet insertion during capillary puncture to avoid

A) bacterial contamination.

B) excessive bleeding.

C) injuring the heel bone.

D) puncturing an artery.

Answer: Injuring the heel bone.

If the alcohol is till wet when a capillary puncture is made it can

A) cause hemolysis of the specimen.

B) lead to errors in the testing process.

C) prevent round drops from forming.

D) All of the options are correct.

Answer: All of the options are correct.

Which of the following is a preferred capillary puncture site?

A) Earlobe

B) Little finger

C) Middle finger

D) Thumb

Answer: Middle finger