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

Arterial inflow adequacy to the limb

Answer

Calf muscle pump ejection fraction

Answer

Ambulatory venous pressure

Question 2

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

Accepted Answer

Common femoral vein

Answer

Superficial femoral vein

Answer

Popliteal vein

Answer

Femoral vein at Hunter's canal

Question 3

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

Accepted Answer

Lipodermatosclerosis or atrophie blanche

Answer

Varicose veins with telangiectasia

Answer

Skin pigmentation or venous eczema

Answer

Non-pitting edema

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

>0.3 seconds

Answer

>1.0 second

Answer

>2.0 seconds

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

Peak systolic velocity at each segment

Answer

Color flow direction and augmentation response only

Answer

Resistive index and pulsatility index

Question 6

The perforating veins of Cockett are clinically significant in venous ulcer disease and are located in which anatomical region?

Accepted Answer

Medial lower leg

Answer

Lateral thigh

Answer

Popliteal fossa

Answer

Dorsum of the foot

Question 7

Which duplex finding best distinguishes secondary varicose veins from primary varicose veins?

Accepted Answer

Deep venous obstruction or reflux causing superficial venous dilation

Answer

Vein diameter consistently exceeding 4 mm

Answer

Reflux duration exceeding 1.0 second in the GSV

Answer

Absence of saphenofemoral junction incompetence