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. 2011;4(3):229-34.
doi: 10.3400/avd.oa.11.00021. Epub 2011 Jul 29.

Three-dimensional CT Venography: A Diagnostic Modality for the Preoperative Assessment of Patients with Varicose Veins

Affiliations

Three-dimensional CT Venography: A Diagnostic Modality for the Preoperative Assessment of Patients with Varicose Veins

Katsutoshi Sato et al. Ann Vasc Dis. 2011.

Abstract

Objective: We preoperatively assessed varicose veins by means of computed tomography (CT) with contrast injection in the veins of the lower extremity (CT venography). This paper reports the procedures, results and implications of CT venography from the surgical aspect.

Methods: A total of 48 legs in 39 patients were examined. Contrast medium was diluted ten-fold and injected into the lower extremity veins, often using a dual route of injection. The images were reconstructed with the volume-rendering method.

Results: CT venography clearly visualized the veins with a small amount of contrast medium and facilitated the identification of anatomy that was not suitable for passing the stripper. In addition, CT venography helped identify unusual types of varicose veins or uncommon sites of inflow of small saphenous veins. Such information was helpful for avoiding unexpected vascular injury or for minimizing skin incision. Dual-route injection was beneficial to minimize the blind zones. Doppler ultrasound could be more focused on hemodynamic assessment and determination of incision sites.

Conclusions: CT Venography is feasible in all cases of varicose veins. When performed in conjunction with ultrasonography, it appears to facilitate the safe and efficient treatment of various types of varicose veins.

Keywords: computed tomography; varicose vein; venography.

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Figures

Fig. 1
Fig. 1
Venography CT images: superficial 3D view (left) and deep 3D view (right). A: great saphenous vein type. * Axial views of the thigh are shown. In the superficial femoral vein, a partial filling defect mimicking deep vein thrombosis was noted. B: small saphenous vein type. Saphenous vein, deep veins and perforators in the entire extremity are clearly visualized. SFV: superficial femoral vein; GSV: great saphenous vein; SFJ: saphenofemoral junction; PV: popliteal vein; SSV: small saphenous vein; SPJ: saphenopopliteal junction
Fig. 2
Fig. 2
Unusual course of the saphenous vein visualized with CT venography. A: angulated course of the vein. B: venous aneurysm. C: large branch connected to the varicose vein. These can lead to unexpected vein injury during the stripping procedure.
Fig. 3
Fig. 3
Uncommon types of varicose veins. A: Vulval varicose vein (arrow) with normal saphenofemoral junction and slightly dilated saphenous trunk. B: Branched saphenous vein (arrow) causing regurgitation at the saphenofemoral junction, but without regurgitation in the saphenous trunk. C: Distal portion of great saphenous varicose vein due to incompetent perforator (arrow). D: Giacomini vein (arrow) with regurgitation of saphenopopliteal junction and dilated great saphenous vein. SFV: superficial femoral vein; GSV: great saphenous vein; SSV: small saphenous vein
Fig. 4
Fig. 4
Small saphenous vein connecting to the femoral vein. There is no connection to the popliteal vein (white arrow). A: Venous aneurysm of small saphenous vein with a large thrombus (black arrow). B: Division into several small veins. SFV: superficial femoral vein; PV: popliteal vein; SSV: small saphenous vein

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