| venous stasis | Congestion and slowing of circulation in veins due to blockage by either obstruction or high pressure in the venous system, usually best seen in the feet and legs. (05 Mar 2000) |
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| venous-stasis retinopathy | A uniocular retinopathy associated with occlusion of the central retinal vein; a nonischemic central retinal vein occlusion. (05 Mar 2000) |
| venous valve | A fold of the lining layer of a vein to prevent a reflux of blood. Synonym: valvula venosa. (05 Mar 2000) |
| vertebral venous system | Any of four interconnected venous networks surrounding the vertebral column; anterior external vertebral venous plexus, the small system around the vertebral bodies; posterior external vertebral venous plexus, the extensive system around the vertebral processes; anterior internal vertebral venous plexus, the system running the length of the vertebral canal anterior to the dura; posterior internal vertebral venous plexus, the system running the length of the vertebral canal posterior to the dura; the latter two constitute the epidural venous plexus. Synonym: plexus venosus vertebralis, Batson's plexus, vertebral venous plexus. (05 Mar 2000) |
| catheterization, central venous | Placement of an intravenous catheter in the subclavian, jugular, or other central vein for central venous pressure determination, chemotherapy, haemodialysis, or hyperalimentation. (12 Dec 1998) |
| renal-splenic venous shunt | Anastomosis of the splenic vein to the left renal vein, usually end-to-side, for control of portal hypertension. Synonym: renal-splenic venous shunt. (05 Mar 2000) |
| central venous catheter | <equipment> Small, flexible plastic tube inserted into the large vein above the heart, through which drugs and blood products can be given and blood samples withdrawn painlessly. Synonym: central line, Hickman catheter. (12 Jan 1998) |
| central venous line | <equipment> Small, flexible plastic tube inserted into the large vein above the heart, through which drugs and blood products can be given and blood samples withdrawn painlessly. Synonym: central line, Hickman catheter. (12 Jan 1998) |
| central venous pressure | The venous pressure as measured at the right atrium, done by means of a catheter introduced through the median cubital vein to the superior vena cava, the distal end of the catheter being attached to a manometer. (12 Dec 1998) |
| chronic venous insufficiency | <cardiology> A condition in which the vein do not channel the flow of blood adequately. most often this condition is seen in the veins of the lower extremities. Symptoms include leg swelling, leg pain and muscle cramps. This condition can predispose to venous thrombosis. (27 Sep 1997) |
| plantar venous arch | The arch formed by the plantar digital veins from the toes which accompanies the plantar arterial arch. Synonym: arcus venosus plantaris. (05 Mar 2000) |
| plantar venous network | A fine superficial venous network in the sole of the foot. Synonym: rete venosum plantare. (05 Mar 2000) |
| prominence of venous valvular sinus | A slight eminence on the external wall of a vein correlating with the valvular sinus immediately proximal to the leaflets of the venous valve. Synonym: agger valvae venae. (05 Mar 2000) |
| hepatic venous segments | Each of the four territories of the liver separately drained by the hepatic veins. Synonym: hepatic venous segments. (05 Mar 2000) |
| nasal venous arch | An arch formed at the root of the nose by the two supratrochlear veins connected by a transverse vein. (05 Mar 2000) |