| HSN | hereditary sensory neuropathy; hospital satellite network |
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| IDSAN | International Drug Safety Advisory Network |
| INET | image network |
| ISDN | integrated services digital network; isosorbide dinitrate |
| ISN | integrated service network; International Society of Nephrology; International Society of Neurochemi... |
| venous insufficiency | <cardiology, surgery> 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. (12 Jan 1998) |
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| venous lakes | Thin-walled collections of blood, resembling blood blisters, found commonly in the ears and less often on the lips and on the face and neck of elderly sun-damaged men, discontinuous venous cavities or channels; Cf.: marginal sinuses of placenta. In skull radiography, round to oval radiolucent foci in the frontal or parietal bones caused by dilated diploic venous channels. (05 Mar 2000) |
| venous ligament | A thin fibrous cord, lying in the fissure of the ligamentum venosum, the remains of the ductus venosus of the foetus. Synonym: Arantius' ligament, ligamentum ductus venosi, venous ligament. (05 Mar 2000) |
| venous murmur | A murmur heard over a vein. (05 Mar 2000) |
| venous plexus | A vascular network formed by numerous anastomoses between veins. Synonym: plexus venosus. (05 Mar 2000) |
| venous plexus of bladder | A plexus of veins around the fundus and sides of the bladder. Synonym: plexus venosus vesicalis, venous plexus of bladder. (05 Mar 2000) |
| venous plexus of foramen ovale | A venous network around the mandibular nerve connecting the cavernous sinus and the pterygoid plexus. Synonym: plexus venosus foraminis ovalis, rete foraminis ovalis. (05 Mar 2000) |
| venous plexus of hypoglossal canal | A small venous network around the hypoglossal nerve, connecting with the occipital sinus, inferior petrosal sinus, and internal jugular vein. Synonym: plexus venosus canalis hypoglossi, circellus venosus hypoglossi, rete canalis hypoglossi. (05 Mar 2000) |
| venous pressure | The blood pressure in a vein. It is usually measured to assess the filling pressure to the ventricle. (12 Dec 1998) |
| venous pulse | A pulsation occurring in the veins, especially the internal jugular vein. Synonym: pulsus venosus. (05 Mar 2000) |
| venous return | The blood returning to the heart via the great veins and coronary sinus. (05 Mar 2000) |
| venous segments of liver | Each of the four territories of the liver separately drained by the hepatic veins. Synonym: hepatic venous segments. (05 Mar 2000) |
| venous segments of the kidney | Anatomical segment's of the kidney drained by tributaries of the renal vein; not a true segmental distribution, since cross communication exists between the various tributaries within the kidney. (05 Mar 2000) |
| venous sinuses | Endothelium-lined venous channels in the dura mater. Synonym: sinus durae matris, cerebral sinuses, cranial sinuses, sinuses of dura mater, venous sinuses. (05 Mar 2000) |
| venous sinus of sclera | sinus venosus sclerae |