ASPT Blood Collection Equipment & Supplies 3

Question 1

According to CLSI guidelines, which specimen should be collected FIRST in the order of draw?

Accepted Answer

Blood culture bottles

Answer

Blood culture bottles are drawn first to minimize the risk of contamination from tube additives that could interfere with microbial culture results.

Question 2

Which tube is collected immediately after blood culture bottles in the CLSI order of draw?

Accepted Answer

Sodium citrate (light blue)

Answer

Sodium citrate (light blue) tubes are drawn second to ensure the precise 9:1 blood-to-citrate ratio is achieved before any additive carryover from other tubes can occur.

Question 3

What is the consequence of collecting a light blue (sodium citrate) tube AFTER a green (heparin) tube?

Accepted Answer

Heparin carryover can falsely prolong coagulation times

Answer

Heparin contamination carried over into a sodium citrate tube can falsely prolong PT and PTT, leading to clinically significant errors in coagulation testing.

Question 4

Which equipment is used to collect arterial blood gas (ABG) specimens?

Accepted Answer

Pre-heparinized ABG syringe

Answer

ABGs are collected using a specially designed pre-heparinized syringe to prevent clotting and preserve oxygen and carbon dioxide values at the time of collection.

Question 5

What is the correct method for disposing of a contaminated needle immediately after venipuncture?

Accepted Answer

Drop it directly into an approved sharps container without recapping

Answer

OSHA standards require that contaminated needles be dropped directly into an approved sharps container immediately after use to prevent needlestick injuries.

(ASPT) American Society of Phlebotomy Technicians Practice Test

(ASPT) American Society of Phlebotomy Technicians Practice Test

ASPT Blood Collection Equipment & Supplies 3