adventitia


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adventitia

 [ad″ven-tish´e-ah]
tunica adventitia. adj., adj adventi´tial.

ad·ven·ti·ti·a

(ad-ven-tish'ă), [TA]
The outermost connective tissue covering of any organ, vessel, or other structure (or part thereof) not covered by a serous coat (visceral peritoneum); instead, the covering is properly derived from without (that is, from the surrounding connective tissue) and does not form an integral part of such organ or structure. Terminologia Anatomica lists adventitia (tunica adventitia) of the following organs: blood vessels, ductus deferens, esophagus, renal pelvis, seminal glands, and ureters.
Synonym(s): tunica adventitia [TA], membrana adventitia (1)
[L. adventicius, coming from abroad, foreign, fr. ad, to + venio, to come]

adventitia

/ad·ven·ti·tia/ (ad″ven-tish´e-ah)

adventitia

(ăd′vĕn-tĭsh′ə, -vən-)
n.
The membranous outer covering of an organ or a blood vessel.

ad′ven·ti′tial adj.

adventitia

[ad′ventish′ə]
Etymology: L, adventitius, coming from abroad
the outermost layer, composed of connective tissue with elastic and collagenous fibers, of an artery or another structure.

adventitia

The outermost layer of a visceral organ; e.g., serosa.

ad·ven·ti·ti·a

(ad'vĕn-tish'ă) [TA]
The outermost connective tissue covering of any organ, vessel, or other structure not covered by a serosa.
Synonym(s): tunica adventitia [TA] .
[L. adventicius, coming from abroad, foreign, fr. ad, to + venio, to come]

adventitia

The outer covering or layer of an organ, especially a blood vessel.

ad·ven·ti·ti·a

(ad'vĕn-tish'ă) [TA]
Outermost connective tissue covering of any organ, vessel, or other structure not covered by a serous coat.
[L. adventicius, coming from abroad, foreign, fr. ad, to + venio, to come]

adventitia

the outer, connective tissue coat of an organ or structure, especially the outer coat of an artery or vein.
References in periodicals archive ?
A skeletonization applies to a "naked" takedown of the RA, free of the concomitant veins, perivascular fat and areolar tissue as well as of the surrounding adventitia.
A third theory is the ganglion theory, which proposes that ganglion cysts migrate into the arterial adventitia.
In addition, the tunica adventitia of large arteries and veins contains a system of vessels, called vasa vasorum, that supply blood to the vascular walls themselves, as well as a network of autonomic nerves, called nervi vascularis, that control contraction of the smooth muscle in the vessel walls.
Pathological examination of the ureteral mass revealed the adventitia and the muscular wall of the ureter invaded by malignant cells; however, the ureteral mucosa was unaffected.
Both ID and IR were associated with marked infiltration of leukocytes in the adventitia, pyknosis of endothelial cells and marked collagen deposition as stained by blue color.
Coronary artery dissection results from separation of the layers of the arterial wall creating a false lumen between the intima and media or media and adventitia.
5) Granulation tissue replaces the adventitia and media, leading to gradual weakening of the arterial wall.
Catheterization-based renal denervation is a minimally invasive procedure involving the application of radiofrequency energy in short bursts along the length of the main renal arteries to ablate the renal nerves that lie within and just beyond the artery's adventitia.
22) Another interesting finding in our study was the occurrence of arterial adventitial fibrosis (> 1:1 ratio comparing media thickness to adventitia thickness involving small pulmonary arteries, 200 [micro]m in diameter) in 40% of our subjects.
The Vessix System for the treatment of hypertension is an over-the-wire balloon catheter with an array of RF electrodes in a precise pattern designed to deliver a modest dose of RF energy to disrupt the renal nerves located in the adventitia that surround the renal artery.
1) Clinical presentation is most commonly with lower extremity claudication secondary to popliteal artery or occasionally iliofemoral artery stenosis caused by the encroachment of the lumen by the cystic changes in the adventitia.

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