Venipuncture Procedures Flashcards

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

Answer: Lymphedema risk

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

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

Answer: Applying downward traction on the skin to stabilize the vein

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

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

Answer: 15–30 degrees

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

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

Answer: Vasovagal syncope

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

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

Answer: Gently invert 8–10 times

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

When performing venipuncture on a patient with small or fragile veins, which needle is most appropriate?

Answer: 23-gauge butterfly needle

A 23-gauge butterfly (winged infusion) set allows better control and flexibility for difficult or fragile veins.

If blood flow stops after initially starting well during venipuncture, which corrective action should be attempted FIRST?

Answer: Gently rotate the needle 180 degrees

Rotating the needle 180 degrees may reposition the bevel away from the vein wall and restore blood flow without restarting the procedure.