VT Venous Mapping & Preoperative Assessment

Question 1

What minimum diameter of the great saphenous vein (GSV) is typically required for use as a bypass conduit?

Accepted Answer

3.0 mm

Answer

1.5 mm

Answer

2.0 mm

Answer

4.5 mm

Question 2

Which patient position best demonstrates GSV diameter during preoperative vein mapping?

Accepted Answer

Standing or reverse Trendelenburg

Answer

Supine with legs flat

Answer

Prone with feet elevated

Answer

Trendelenburg with legs elevated 30°

Question 3

In the CEAP classification system for chronic venous disease, what does the letter 'C' represent?

Accepted Answer

Clinical signs

Answer

Chronic venous disease stage

Answer

Compression therapy class

Answer

Collateral vessel grading

Question 4

Which CEAP clinical class specifically describes an active venous ulcer?

Accepted Answer

C6

Answer

C4b

Answer

C5

Answer

C3

Question 5

At which anatomical junction does the small saphenous vein (SSV) typically terminate?

Accepted Answer

Saphenopopliteal junction in the popliteal fossa

Answer

Saphenofemoral junction in the groin

Answer

Superficial femoral vein in the mid-thigh

Answer

Anterior tibial vein at the ankle

Question 6

Which imaging modality is the standard of care for preoperative GSV mapping prior to coronary artery bypass grafting (CABG)?

Accepted Answer

Duplex ultrasound

Answer

CT angiography

Answer

MR venography

Answer

Conventional contrast venography

Question 7

Which duplex ultrasound finding indicates an incompetent perforating vein?

Accepted Answer

Outward flow lasting >0.5 seconds upon release of calf compression

Answer

Inward flow lasting >1.0 second during calf compression

Answer

Absent flow at rest in the perforator

Answer

Bidirectional flow synchronous with respiration