MA Chapter 47

Which needle lumen is the largest and used for blood bank procedures?

16g

Which gauge needle is used most frequently when drawing blood from the antecubital area?

21g

After collecting a blood specimen for serum testing, how long must the sample sit in the rack before it is spun in the centrifuge?

30-60 minutes

Which of the following antiseptics are used when preparing the venipuncture site?

70% isopropyl alcohol

When drawing a CBC, INR, and glucose, which is the correct order of draw?

Blue, lavender, gray

Lavender top tubes contain which of the following additives?

EDTA

Which location is the best site to use for capillary puncture on an infant?

Heel

When blood is separated in an anticoagulated tube, what is present at the top of the tube?

Plasma

Which color phlebotomy tube is used to collect specimens for serum analysis?

Red or gold

A gray-top tube is collected for glucose testing but does not contain the required volume of blood. What effect will this have on the result?

Underfilling a collection tube will provide false results.