splenic portal venography |
Introduction of radiopaque material into the spleen to obtain an X-ray visualization of the portal vessel of the portal circulation.
Synonym: splenic portal venography.
Origin: spleno-+ portography
(05 Mar 2000) |
venography |
<investigation> A special X-ray of the veins that is performed by first injecting a radiopaque contrast (shows up on X-ray) into the vein in question and then taking a conventional X-ray. Used to demonstrate a blockage of a vein. Commonly used in the lower extremities to diagnose deep venous thrombosis.
(27 Sep 1997) |
vertebral venography |
Radiographic demonstration of the epidural venous plexus by injection of contrast medium into the spinous process.
(05 Mar 2000) |
transosseous venography |
Radiographic demonstration of veins that drain a bone's marrow, by injection of contrast medium into the marrow at an appropriate point, as in vertebral venography or azygography by rib injection.
(05 Mar 2000) |
anterior intestinal portal |
Anterior intestinal portal; the opening of the foregut into the midgut.
See: epigastric fossa.
Synonym: anterior intestinal portal.
(05 Mar 2000) |
cavernous transfer of portal vein |
<anatomy, vein> Replacement of the portal vein by a number of collateral channels, a consequence of thrombosis.
(05 Mar 2000) |
renal-portal |
<anatomy> Both renal and portal. See Portal.
Source: Websters Dictionary
(01 Mar 1998) |
renal portal system |
An arterial portal system, in which efferent glomerular arterioles receive blood from the capillaries of the renal glomeruli and carry it to the peritubular capillary plexus surrounding the proximal and distal convoluted tubules.
Synonym: hypothalamohypophysial portal system.
(05 Mar 2000) |
right branch of portal vein |
<anatomy, vein> Terminal branch of hepatic portal vein distributed to right lobe of liver tributary: cystic vein.
Synonym: ramus dexter venae portae hepatis.
(05 Mar 2000) |
portal |
1. A door or gate; hence, a way of entrance or exit, especially one that is grand and imposing. "Thick with sparkling orient gems The portal shone." (Milton) "From out the fiery portal of the east." (Shak)
2. The lesser gate, where there are two of different dimensions. Formerly, a small square corner in a room separated from the rest of the apartment by wainscoting, forming a short passage to another apartment.
By analogy with the French portail, used by recent writers for the whole architectural composition which surrounds and includes the doorways and porches of a church.
3. <engineering> The space, at one end, between opposite trusses when these are terminated by inclined braces.
4. A prayer book or breviary; a portass.
<engineering> Portal bracing, a combination of struts and ties which lie in the plane of the inclined braces at a portal, serving to transfer wind pressure from the upper parts of the trusses to an abutment or pier of the bridge.
Origin: OF. Portal, F. Portail, LL. Portale, fr. L. Porta a gate. See Port a gate.
<anatomy> Of or pertaining to a porta, especially the porta of the liver; as, the portal vein, which enters the liver at the porta, and divides into capillaries after the manner of an artery.
Portal is applied to other veins which break up into capillaries; as, the renal portal veins in the frog.
Source: Websters Dictionary
(01 Mar 1998) |
portal canals |
Connective tissue spaces in the substance of the liver that are occupied by preterminal ramifications of the bile ducts, portal vein, and hepatic artery, as well as nerves and lymphatics.
(05 Mar 2000) |
portal circulation |
Circulation of blood to the liver from the small intestine, the right half of the colon, and the spleen via the portal vein; sometimes specified as the hepatic portal circulation, more generally, any part of the systemic circulation in which blood draining from the capillary bed of one structure flows through a larger vessel(s) to supply the capillary bed of another structure before returning to the heart; e.g., the hypothalamohypophyseal portal system.
(05 Mar 2000) |
portal cirrhosis |
Synonym: Laennec's cirrhosis.
(05 Mar 2000) |
portal fissure |
A transverse fissure on the visceral surface of the liver between the caudate and quadrate lobes, lodging the portal vein, hepatic artery, hepatic nerve plexus, hepatic ducts, and lymphatic vessels.
Synonym: caudal transverse fissure, portal fissure.
(05 Mar 2000) |
portal hypertension |
Any increase in the portal vein (in the liver) pressure due to anatomic or functional obstruction (for example alcoholic cirrhosis) to blood flow in the portal venous system. Indicators of portal hypertension are: oesophageal varices, haemorrhoids, enlarged veins on the anterior abdominal wall (caput Medusae) and ascites (fluid within the abdominal cavity).
(27 Sep 1997) |