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

Reduction in vein wall thickness by >50%

Answer

Reversal of saphenofemoral reflux direction

Answer

Absence of color flow signal in the common femoral vein

Question 2

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

Accepted Answer

Endovenous thermal ablation (laser or radiofrequency)

Answer

Foam sclerotherapy of varicose veins

Answer

Compression sclerotherapy of telangiectasias

Answer

Ambulatory microphlebectomy

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

Less than 25% of the lumen

Answer

50% or more of the lumen

Answer

Complete occlusion of the common femoral vein

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

Progressive deep venous insufficiency postoperatively

Answer

New perforator incompetence developing in the thigh

Answer

Contralateral SSV incompetence

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

Use the vein with a sequential bypass technique to optimize flow

Answer

Dilate the vein intraluminally with a balloon before harvest

Answer

Harvest in situ and use a valvulotome to maximize caliber

Question 6

Which augmentation technique is recommended when assessing superficial venous reflux with the patient in the standing position?

Accepted Answer

Distal limb compression and rapid release

Answer

Valsalva maneuver alone

Answer

Proximal pneumatic cuff inflation

Answer

Limb elevation followed by rapid dependency

Question 7

Beyond diameter measurements, what is the single most important piece of information provided to the surgeon after GSV mapping?

Accepted Answer

Skin-marked course of the vein drawn under ultrasound guidance

Answer

Spectral waveform analysis at each measurement site

Answer

Power Doppler color flow images of the entire vein

Answer

Wall echogenicity ratings along each segment