WordNet

a continuous tube formed by a row of elongated cells lacking intervening end walls
an enclosed conduit for a fluid
a bodily passage or tube lined with epithelial cells and conveying a secretion or other substance; "the tear duct was obstructed"; "the alimentary canal"; "poison is released through a channel in the snakes fangs" (同)epithelial duct, canal, channel

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送水管;(建物・船などの)通気管;(地下ケーブルなどの)ダクト / (体液を運ぶ)導管,(植物が水・空気を運ぶ)導管

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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2018/02/25 02:06:58」(JST)

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In the fetus, the ductus venosus (Arantius' duct after Julius Caesar Aranzi^[1]) shunts a portion of the left umbilical vein blood flow directly to the inferior vena cava.^[2] Thus, it allows oxygenated blood from the placenta to bypass the liver. Compared to the 50% shunting of umbilical blood through the ductus venosus found in animal experiments, the degree of shunting in the human fetus under physiological conditions is considerably less, 30% at 20 weeks, which decreases to 18% at 32 weeks, suggesting a higher priority of the fetal liver than previously realized.^[3] In conjunction with the other fetal shunts, the foramen ovale and ductus arteriosus, it plays a critical role in preferentially shunting oxygenated blood to the fetal brain. It is a part of fetal circulation.

Anatomic course

The pathway of fetal umbilical venous flow is umbilical vein to left portal vein to ductus venosus to inferior vena cava and eventually the right atrium. This anatomic course is important in the assessment of neonatal umbilical venous catheterization, as failure to cannulate through the ductus venosus results in malpositioned hepatic catheterization via the left or right portal veins. Complications of such positioning can include hepatic hematoma or abscess.

Postnatal closure

The ductus venosus is open at the time of the birth and is the reason why umbilical vein catheterization works. The ductus venosus naturally closes during the first week of life in most full-term neonates; however, it may take much longer to close in pre-term neonates. Functional closure occurs within minutes of birth. Structural closure in term babies occurs within 3 to 7 days.

After it closes, the remnant is known as ligamentum venosum.

If the ductus venosus fails to occlude after birth, it remains patent (open), and the individual is said to have a patent ductus venosus and thus an intrahepatic portosystemic shunt (PSS).^[4] This condition is hereditary in some dog breeds (e.g. Irish Wolfhound). The ductus venosus shows a delayed closure in preterm infants, with no significant correlation to the closure of the ductus arteriosus or the condition of the infant.^[5] Possibly, increased levels of dilating prostaglandins leads to a delayed occlusion of the vessel.^[5]

References

^ "Whonamedit - dictionary of medical eponyms". www.whonamedit.com.
^ Kiserud, T.; Rasmussen, S.; Skulstad, S. (2000). "Blood flow and the degree of shunting through the ductus venosus in the human fetus". American Journal of Obstetrics and Gynecology. 182 (1 Pt 1): 147–153. doi:10.1016/S0002-9378(00)70504-7. PMID 10649170.
^ Kiserud, T (2000). "Fetal venous circulation -- an update on hemodynamics". J Perinat Med. 28 (2): 90–6. doi:10.1515/JPM.2000.011. PMID 10875092.
^ Online Mendelian Inheritance in Man, Patent ductus venosus; PDV.
^ ^a ^b Fugelseth D, Lindemann R, Liestøl K, Kiserud T, Langslet A (December 1998). "Postnatal closure of ductus venosus in preterm infants ≤32 weeks. An ultrasonographic study". Early Hum. Dev. 53 (2): 163–9. doi:10.1016/s0378-3782(98)00051-6. PMID 10195709.

UpToDate Contents

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1. 胎児評価のための静脈ドップラー venous doppler for fetal assessment
2. 子宮内から子宮外の生活への生理的変化 physiologic transition from intrauterine to extrauterine life
3. 胎児異数性に関連する超音波所見 sonographic findings associated with fetal aneuploidy
4. 胎児の発育遅延：評価およびマネージメント fetal growth restriction evaluation and management
5. 胎児サーベイランスのための臍動脈ドップラー超音波検査 doppler ultrasound of the umbilical artery for fetal surveillance

English Journal

Epidemiology and treatment of invasive fungal diseases in patients with multiple myeloma: findings from a multicenter prospective study from China.

Liu J1, Huang H2, Li Y3, Liu L4, Li J5, Liu Z6, Lu J7, Ouyang J8, Song Y9, Zhou D10, Ren H11, Ma J12, Wang C13, Yu L14, Zhou J15, Wang J16, Xiao Y17, Huang X18, Li J19.
Tumour biology : the journal of the International Society for Oncodevelopmental Biology and Medicine.Tumour Biol.2015 Dec 23. [Epub ahead of print]
The aim of this study is to investigate the epidemiology, diagnosis, treatment and risk factors of multiple myeloma patients with invasive fungi disease (IFD) in China. We analyzed multiple myeloma (MM) patients receiving chemotherapy in a prospective multicenter study. Basic characteristics, the di
PMID 26700667

Intrahepatic Persistent Right Umbilical Vein and Associated Outcomes: A Systematic Review of the Literature.

Lide B1, Lindsley W1, Foster MJ1, Hale R1, Haeri S2.
Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine.J Ultrasound Med.2015 Dec 3. pii: 15.01008. [Epub ahead of print]
The aim of this study was to provide a comprehensive review of the current data surrounding an intrahepatic persistent right umbilical vein in the fetus, including associated anomalies and outcomes, and to assist practitioners in counseling and management of affected pregnancies. We performed a MEDL
PMID 26635256

Variation of safety indices during in the learning curve for color Doppler assessment of the fetal heart at 11+0 to 13+6 weeks' gestation.

Nemescu D1, Berescu A2, Rotariu C3.
Medical ultrasonography.Med Ultrason.2015 Dec;17(4):464-74. doi: 10.11152/mu.2013.2066.174.vsy.
AIMS: The aim of our study was to analyze the variation of acoustic output, as expressed by the thermal (TI) and mechanical index (MI), during the learning curve for a fetal heart scan at 11-13 gestational weeks, with the introduction of a new ultrasound system.MATERIAL AND METHODS: This was a prosp
PMID 26649341

Japanese Journal

ISP-9-9 Time interval assessment of ductus venosus and ventricular inflow in normal singleton fetuses(Group 9 Perinatology 1,IS Poster,International Session)

Wada Natsuko,Tachibana Daisuke,Sano Miho,Kurihara Yasushi,Nakagawa Kayoko,Yamamoto Hiroko,Hamasaki Shin,Hamuro Akihiro,Terada Hiroyuki,Nakano Akemi,Ozaki Koji,Koyama Masayasu
日本産科婦人科學會雜誌 66(2), 945, 2014-02-01
NAID 110009813052

Successful Treatment Using Coil Embolization of a Symptomatic Intrahepatic Portosystemic Venous Shunt Developing through a Patent Ductus Venosus in a Noncirrhotic Adult

Saito Masaya,Seo Yasushi,Yano Yoshihiko,Momose Kenji,Hirano Hirotaka,Yoshida Masaru,Azuma Takeshi
Internal Medicine 52(5), 555-559, 2013
… CT angiography revealed a patent ductus venosus between the anterior segmental branch of the portal vein and the middle hepatic vein. … Coils were framed in the patent ductus venosus and then used to fill in the frame. … After treatment, transarterial portography showed that the shunt flow of the ductus venosus had decreased significantly. …
NAID 130003365932

Stent placement in the ductus venosus of a neonate with total anomalous pulmonary venous return

OONISHI Tatsuya,HAYABUCHI Yasunobu,SAKATA Miho,MORI Kazuhiro,KAGAMI Shoji
Journal of echocardiography : official publication of the Japanese Society of Echocardiography 10(1), 27-29, 2012-03-28
NAID 10030334527

Related Pictures

Human Development Fetal Circulation (Ductus Venosus, Foramen Ovale & Ductus Arteriosus) - Sarah Clifford Cardiovascular System - Ductus Venosus - Embryology Development of Blood Vessels and Fetal Circulation - VOER AN2 04: Heart Development at Touro University (NV) - StudyBlue File:Patent ductus arteriosus.jpg - Wikimedia Commons

★リンクテーブル★

リンク元	「静脈管」
拡張検索	「ductus venosus Arantii」
関連記事	「duct」「ductus」

「静脈管」

Ductus venosus
	Fetal circulation. The ductus venosus (red) connects the umbilical vein to the inferior vena cava.
	The liver and the veins in connection with it, of a human embryo, twenty-four or twenty-five days old, as seen from the ventral surface.
Details
Source	Umbilical vein
Drains to	Inferior vena cava
Artery	Ductus arteriosus
Latin	Ductus venosus
	Anatomical terminology [edit on Wikidata]