関: small vein、venulae、venular、venule

WordNet

a minute vein continuous with a capillary (同)venula, capillary vein

Wikipedia preview

出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2013/10/26 16:13:32」(JST)

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A venule is a very small blood vessel in the microcirculation that allows blood to return from the capillary beds to the larger blood vessels called veins. Venules range from 7 to 50μm in diameter. Veins contain approximately 70% of total blood volume, 25% of which is contained in the venules.^[1]

Venules are blood vessels that drain blood directly from the capillary beds. Many venules unite to form a vein.

Structure[edit]

Venule walls have three layers: An inner endothelium composed of squamous endothelial cells that act as a membrane, a middle layer of muscle and elastic tissue and an outer layer of fibrous connective tissue. The middle layer is poorly developed so that venules have thinner walls than arterioles. They are extremely porous so that fluid and blood cells can move easily from the bloodstream through their walls.

In contrast to regular venules, high endothelial venules are a special type of venule where the endothelium is made up of simple cuboidal cells. Lymphocytes exit the blood stream and enter the lymph nodes via these specialized venules when an infection is detected.

They form from anastomosis of capillaries, using the beta form of semi-red blood cells and white blood cells to form.

References[edit]

^ Woods, Susan (2010). Cardiac Nursing. New York: Lippincotts. p. 955. ISBN 9780781792806.

External links[edit]

MeSH A07.231.432.952

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English Journal

Assessment of endothelial cell function and physiological microcirculatory reserve by video microscopy using a topical acetylcholine and nitroglycerin challenge.

Hilty MP1, Pichler J2,3, Ergin B4, Hefti U5, Merz TM3, Ince C4, Maggiorini M6.
Intensive care medicine experimental.Intensive Care Med Exp.2017 Dec;5(1):26. doi: 10.1186/s40635-017-0139-0. Epub 2017 May 18.
PMID 28523563

Cerebral small vessel disease and post-stroke cognitive impairment.

Teng Z1,2, Dong Y1, Zhang D1,2, An J1, Lv P1,2.
The International journal of neuroscience.Int J Neurosci.2017 Sep;127(9):824-830. doi: 10.1080/00207454.2016.1261291. Epub 2016 Nov 28.
PMID 27838946

Modeling of pulsatile flow-dependent nitric oxide regulation in a realistic microvascular network.

Wang R1, Pan Q2, Kuebler WM3, Li JK4, Pries AR5, Ning G6.
Microvascular research.Microvasc Res.2017 Sep;113:40-49. doi: 10.1016/j.mvr.2017.05.001. Epub 2017 May 3.
PMID 28478072

Japanese Journal

うっ滞性皮膚病変治療の静脈還流への影響

菰田拓之
静脈学 24(1), 49-55, 2013-02-25
●要　　約：うっ滞性潰瘍の長期成績向上には潰瘍のみならず周辺のうっ滞性皮膚病変の摘出再建も有効と思われるが，どこまで摘出すべきか確立されたものはない．今回皮膚病変への加療が静脈還流へどのように貢献するのか，自験例を過去の報告例を踏まえ検討した．皮膚病変内の細静脈での血栓形成，血栓後症候群はストリッピング術などの静脈処理施行後も皮膚軟部組織レベルの静脈還流障害を残存させる．またうっ滞性皮膚病変そのも …
NAID 10031156550

PVODを示唆する肺細静脈病変を合併し肺高血圧を伴った限局性強皮症の1例

林宏紀,森本耕三,松山政史,国保成暁,太田恭子,増子裕典,飯塚尚志,林原賢治,斎藤武文,河端美則
日本呼吸器学会雑誌 = The journal of the Japanese Respiratory Society 47(5), 376-382, 2009-05-10
NAID 10024823999

寛骨臼移動術後の下肢深部静脈血栓症に対し下大静脈フィルターを併用して致死的肺塞栓症を予防し得た一例

酒井健次,野口康男,神宮司誠也,首藤敏秀,中島康晴,末永英慈,岩本幸英,坂井修二
整形外科と災害外科 49(2), 335-344, 2000-03-25
… The defects of the contrast medium were seen between the right common iliac vein and calf venula when venography was performed. …
NAID 10010025436