Phlebotomy Test Venipuncture Procedures 3

Question 1

Which condition is a contraindication to using the antecubital vein on the same side as a mastectomy?

Accepted Answer

Lymphedema risk

Answer

Venipuncture on the same side as a mastectomy risks introducing infection or worsening lymphedema due to compromised lymphatic drainage.

Question 2

What does the term 'anchoring the vein' mean during venipuncture?

Accepted Answer

Applying downward traction on the skin to stabilize the vein

Answer

Anchoring involves pulling the skin taut below the insertion site to stabilize a rolling vein and facilitate smooth needle entry.

Question 3

What angle of needle insertion is recommended for standard adult venipuncture?

Accepted Answer

15–30 degrees

Answer

A 15–30 degree angle allows the needle to enter the vein cleanly without going through the back wall.

Question 4

A patient reports feeling faint and breaks into a cold sweat during venipuncture. This is most likely a sign of:

Accepted Answer

Vasovagal syncope

Answer

Vasovagal syncope is a common reaction characterized by fainting, pallor, diaphoresis, and bradycardia triggered by needle anxiety or pain.

Question 5

Which of the following is the correct way to mix an anticoagulant tube after collection?

Accepted Answer

Gently invert 8–10 times

Answer

Gentle inversion 8–10 times ensures the additive is thoroughly mixed with the blood without causing hemolysis.

Phlebotomy Practice Test