VABC Vascular Access Devices & Technologies 2

Question 1

Which catheter feature is most important when selecting a PICC for frequent blood sampling in an adult patient?

Accepted Answer

Largest lumen diameter compatible with vessel size

Answer

Larger lumen diameters allow adequate blood draw flow rates without collapsing the catheter during aspiration.

Question 2

A valved PICC differs from a non-valved PICC primarily in that it:

Accepted Answer

Eliminates the need for a clamp to prevent air embolism

Answer

Valved PICCs (e.g., Groshong or PASV valve) open only under pressure differentials, eliminating the need for external clamping to prevent air entry or blood reflux.

Question 3

Which gauge peripheral IV catheter provides the fastest flow rate for emergency fluid resuscitation?

Accepted Answer

14 gauge

Answer

Flow rate increases dramatically with larger bore catheters; a 14-gauge catheter provides the highest flow rate among standard peripheral IVs per Poiseuille's Law.

Question 4

What is the primary advantage of a power-injectable PICC over a standard PICC?

Accepted Answer

Ability to withstand high-pressure contrast injection for CT imaging

Answer

Power-injectable PICCs are rated to withstand the high pressures (typically 300 psi) generated by power injectors used for CT contrast studies.

Question 5

An anti-reflux valve integrated into a needleless connector functions by:

Accepted Answer

Preventing blood backflow into the catheter upon disconnection

Answer

Anti-reflux valves close upon syringe removal to prevent blood from entering the catheter lumen, which can reduce thrombus formation.

(VABC) Vascular Access Board Certification Practice Test

(VABC) Vascular Access Board Certification Practice Test

VABC Vascular Access Devices & Technologies 2