adventitia


Also found in: Dictionary, Thesaurus, Medical, Wikipedia.

adventitia

[‚ad·ven′tish·ə]
(anatomy)
The external, connective-tissue covering of an organ or blood vessel. Also known as tunica adventitia.
References in periodicals archive ?
Caption: Figure 3: The eNOS immunoreactivity in the control group of rats' endothelium (thin arrow) and adventitia (thick arrow) of thoracic aorta, x 400.
The esophagus lacks serosa, with the most external aspect being layers of connective tissue representing adventitia and whose involvement is considered pT3.
This consideration also includes the regime of anisotropic deformation when the constituted material of the membrane within the aneurysm region is made up of the intima and adventitia since the concept of Poisson ratio can be extended to anisotropic materials with values outside the isotropic range 1 S v0 S 0.
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.
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.
Double silk ligature was used to band the PA while silk was in turn fixed to the adventitia of pulmonary artery by using Prolene / Ethibond in children.
Epicardium of ventricles was continued with aorta and pulmonary arteries as tunica adventitia.
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.
The adventitia containing fibroblasts was carefully removed by microforceps.
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.
Results on 10 patients to date, at nine-month follow-up after an angioplasty or atherectomy, showed that those patients who also were infused with dexamethasone to the adventitia of the targeted blood vessel using the Bullfrog Micro-Infusion Catheter have now passed nine months without restenosis of the index lesion.

Full browser ?