VA-BC — Vascular Access Board Certified
WITH CORRECT ACTUAL QUESTIONS AND
CORRECTLY WELL DEFINED ANSWERS
LATEST ALREADY GRADED A+ (2025/2026)
Domain I-A: Device Assessment and Selection (Questions 1-15)
Question 1
The French (Fr) scale measures which dimension of a catheter?
A) Internal diameter
B) External diameter
C) Length of the catheter
D) Lumen volume
Correct ,,,,Answer,,,,: B) External diameter ✅
Rationale: The French scale measures the external diameter of a
catheter. One French = 1/3 millimeter (0.33 mm). Fr size = external
diameter in mm × 3. For example, a 2 mm external diameter = 6 Fr .
Question 2
A 2 mm external diameter catheter would be what French size?
,A) 2 Fr
B) 4 Fr
C) 6 Fr
D) 8 Fr
Correct ,,,,Answer,,,,: C) 6 Fr ✅
Rationale: Fr size = external diameter in mm × 3. Therefore, 2 mm × 3 = 6
Fr .
Question 3
The gauge scale measures which dimension of a catheter?
A) External diameter
B) Internal diameter
C) Catheter length
D) Catheter weight
Correct ,,,,Answer,,,,: B) Internal diameter ✅
Rationale: The gauge scale measures the internal diameter of a catheter.
The larger the gauge number, the smaller the internal diameter .
Question 4
Which vein is the preferred insertion site for a PICC line in adults?
A) Cephalic vein
B) Basilic vein
,C) Median cubital vein
D) Radial vein
Correct ,,,,Answer,,,,: B) Basilic vein ✅
Rationale: The basilic vein is preferred for PICC insertion due to its
straight course, larger diameter, and direct path to the central circulation.
The cephalic vein has a more tortuous path and higher risk of
malposition .
Question 5
A patient requires long-term intravenous antibiotic therapy for 6 weeks.
Which vascular access device is most appropriate?
A) Short peripheral IV catheter
B) Midline catheter
C) Peripherally inserted central catheter (PICC)
D) Intraosseous device
Correct ,,,,Answer,,,,: C) Peripherally inserted central catheter (PICC) ✅
Rationale: A PICC is ideal for long-term therapies (weeks to months),
reducing the risk of complications associated with repeated cannulation.
Peripheral IVs are for short-term use (≤96 hours) .
Question 6
What is the recommended maximum dwell time for a short peripheral IV
catheter in an adult?
, A) 24 hours
B) 48 hours
C) 72-96 hours
D) 7 days
Correct ,,,,Answer,,,,: C) 72-96 hours ✅
Rationale: Peripheral IV catheters should be replaced every 72-96 hours
to reduce infection risk, unless clinically indicated otherwise. Catheters
inserted under emergency conditions should be replaced within 48
hours .
Question 7
Which catheter material is most appropriate when using ethanol lock
therapy?
A) Polyurethane
B) Silicone
C) Polyethylene
D) Teflon
Correct ,,,,Answer,,,,: B) Silicone ✅
Rationale: Silicone catheters are extremely flexible, have a higher
inner/outer diameter ratio, and are not affected by chemicals such as
alcohol. Polyurethane can be degraded by alcohol, so it should be
avoided for ethanol lock therapy .
WITH CORRECT ACTUAL QUESTIONS AND
CORRECTLY WELL DEFINED ANSWERS
LATEST ALREADY GRADED A+ (2025/2026)
Domain I-A: Device Assessment and Selection (Questions 1-15)
Question 1
The French (Fr) scale measures which dimension of a catheter?
A) Internal diameter
B) External diameter
C) Length of the catheter
D) Lumen volume
Correct ,,,,Answer,,,,: B) External diameter ✅
Rationale: The French scale measures the external diameter of a
catheter. One French = 1/3 millimeter (0.33 mm). Fr size = external
diameter in mm × 3. For example, a 2 mm external diameter = 6 Fr .
Question 2
A 2 mm external diameter catheter would be what French size?
,A) 2 Fr
B) 4 Fr
C) 6 Fr
D) 8 Fr
Correct ,,,,Answer,,,,: C) 6 Fr ✅
Rationale: Fr size = external diameter in mm × 3. Therefore, 2 mm × 3 = 6
Fr .
Question 3
The gauge scale measures which dimension of a catheter?
A) External diameter
B) Internal diameter
C) Catheter length
D) Catheter weight
Correct ,,,,Answer,,,,: B) Internal diameter ✅
Rationale: The gauge scale measures the internal diameter of a catheter.
The larger the gauge number, the smaller the internal diameter .
Question 4
Which vein is the preferred insertion site for a PICC line in adults?
A) Cephalic vein
B) Basilic vein
,C) Median cubital vein
D) Radial vein
Correct ,,,,Answer,,,,: B) Basilic vein ✅
Rationale: The basilic vein is preferred for PICC insertion due to its
straight course, larger diameter, and direct path to the central circulation.
The cephalic vein has a more tortuous path and higher risk of
malposition .
Question 5
A patient requires long-term intravenous antibiotic therapy for 6 weeks.
Which vascular access device is most appropriate?
A) Short peripheral IV catheter
B) Midline catheter
C) Peripherally inserted central catheter (PICC)
D) Intraosseous device
Correct ,,,,Answer,,,,: C) Peripherally inserted central catheter (PICC) ✅
Rationale: A PICC is ideal for long-term therapies (weeks to months),
reducing the risk of complications associated with repeated cannulation.
Peripheral IVs are for short-term use (≤96 hours) .
Question 6
What is the recommended maximum dwell time for a short peripheral IV
catheter in an adult?
, A) 24 hours
B) 48 hours
C) 72-96 hours
D) 7 days
Correct ,,,,Answer,,,,: C) 72-96 hours ✅
Rationale: Peripheral IV catheters should be replaced every 72-96 hours
to reduce infection risk, unless clinically indicated otherwise. Catheters
inserted under emergency conditions should be replaced within 48
hours .
Question 7
Which catheter material is most appropriate when using ethanol lock
therapy?
A) Polyurethane
B) Silicone
C) Polyethylene
D) Teflon
Correct ,,,,Answer,,,,: B) Silicone ✅
Rationale: Silicone catheters are extremely flexible, have a higher
inner/outer diameter ratio, and are not affected by chemicals such as
alcohol. Polyurethane can be degraded by alcohol, so it should be
avoided for ethanol lock therapy .
