VT Venous Mapping & Preoperative Assessment 2

Question 1

What does the venous filling index (VFI) measured by air plethysmography (APG) primarily quantify?

Accepted Answer

Rate and degree of venous reflux

Answer

The VFI reflects how rapidly the venous volume of the leg refills after exercise, serving as a quantitative measure of the severity of venous reflux.

Question 2

At the saphenofemoral junction (SFJ), the GSV drains into which vessel?

Accepted Answer

Common femoral vein

Answer

The GSV joins the common femoral vein at the SFJ, located in the femoral triangle just below the inguinal ligament.

Question 3

In the CEAP classification, which condition does the subclass C4b describe?

Accepted Answer

Lipodermatosclerosis or atrophie blanche

Answer

C4b specifically identifies lipodermatosclerosis (fibrotic skin thickening) or atrophie blanche (white scarred skin), which represent more advanced skin changes than C4a.

Question 4

What is the minimum reflux duration at the saphenofemoral junction that is considered pathologic on duplex ultrasound?

Accepted Answer

>0.5 seconds

Answer

Reflux duration exceeding 0.5 seconds in the superficial venous system (including the SFJ) is the accepted threshold for pathologic incompetence.

Question 5

When performing GSV mapping for CABG, which set of parameters must be documented along the vein course?

Accepted Answer

Diameter, continuity, compressibility, and marked skin location

Answer

Comprehensive GSV mapping documents luminal diameter at multiple levels, vein continuity, wall compressibility confirming patency, and the skin-marked course for intraoperative guidance.

(VT) Vascular Technician Certification Practice Test

(VT) Vascular Technician Certification Practice Test

VT Venous Mapping & Preoperative Assessment 2