VT Venous Mapping & Preoperative Assessment 3

Question 1

Which duplex ultrasound finding confirms successful endovenous thermal ablation of the GSV at follow-up?

Accepted Answer

Occlusion or fibrosis of the treated vein segment

Answer

Successful endovenous ablation results in thrombotic occlusion followed by fibrosis of the treated segment, confirmed by the absence of compressibility and flow on duplex imaging.

Question 2

Endovenous heat-induced thrombus (EHIT) is a recognized complication of which vascular procedure?

Accepted Answer

Endovenous thermal ablation (laser or radiofrequency)

Answer

EHIT occurs when thermally induced thrombus propagates from the treated superficial vein into the deep venous system at the saphenofemoral or saphenopopliteal junction.

Question 3

In the EHIT classification, Class 2 is defined as thrombus extending into the common femoral vein occupying what proportion of the lumen?

Accepted Answer

Less than 50% of the lumen

Answer

EHIT Class 2 describes thrombus extending into the common femoral vein but occupying less than 50% of the lumen, distinguishing it from Class 3 (≥50%) and Class 4 (complete occlusion/DVT).

Question 4

What is the most common cause of recurrent varicose veins following surgical GSV ligation and stripping?

Accepted Answer

Neovascularization at the saphenofemoral junction

Answer

Neovascularization — the formation of new small tortuous vessels at the groin scar — is the most frequently identified mechanism of recurrence after surgical SFJ ligation.

Question 5

A preoperative vein mapping documents a GSV diameter of 1.8 mm throughout its course. What is the most appropriate recommendation?

Accepted Answer

Recommend an alternative conduit such as arm vein or synthetic graft

Answer

A GSV measuring 1.8 mm is below the 3.0 mm minimum threshold for bypass conduit use, and the surgeon should be advised to use an alternative such as upper extremity vein or a prosthetic graft.

(VT) Vascular Technician Certification Practice Test

(VT) Vascular Technician Certification Practice Test

VT Venous Mapping & Preoperative Assessment 3