umbilical artery


Also found in: Dictionary, Thesaurus, Legal, Acronyms, Encyclopedia, Wikipedia.
Related to umbilical artery: middle cerebral artery

um·bil·i·cal ar·ter·y

[TA]
before birth this artery is a continuation of the internal iliac; after birth it is obliterated between the bladder and umbilicus, forming the medial umbilical ligament, the remaining portion, between the internal iliac artery and bladder, being reduced in size and giving off the superior vesical arteries.
Synonym(s): arteria umbilicalis [TA]

umbilical artery

the first branch of the anterior trunk of the internal iliac artery and the origin of the superior vesical artery. In the fetus, the umbilical artery is large and carries blood from the fetus to the placenta. After birth, the vessel closes distally to the origin of the superior vesical artery and eventually becomes a solid fibrous cord, the medial umbilical ligament.

um·bil·i·cal ar·te·ry

(ŭm-bil'i-kăl ahr'tĕr-ē) [TA]
Before birth, a continuation of the internal iliac; after birth it is obliterated between the bladder and umbilicus, forming the medial umbilical ligament, the remaining portion, between the internal iliac artery and bladder, being reduced in size and giving off the superior vesical arteries.
Synonym(s): arteria umbilicalis [TA] .

umbilical artery

In the embryo, either of a pair of arteries that originate in the embryonic aortas (the dorsal aortas) and that carry blood from the embryo to the yolk sac and the chorion. In the adult, the lumen of the umbilical arteries disappears and the arteries become fibrous cords, called the medial umbilical ligaments, along the inner surface of the abdominal wall.
See also: artery
References in periodicals archive ?
The most recent studies indicate that umbilical artery blood should be sampled since this reflects the state of the infant and not how well the placenta is functioning.
In patients whose pregnancy is at 30 weeks or less, delivery may be postponed so long as nonstress tests and umbilical artery Doppler findings remain reassuring.
Fetal growth restriction was defined by a combination of abdominal circumference below the 5th percentile and more than a 2-standard-deviation elevation of the umbilical artery pulsatility index.
1-4) Doppler ultrasound assessment of the flow velocity waveforms (FVWs) in the umbilical artery of the fetus with poor growth has been shown to improve perinatal outcome.
About 67% of the 430 patients had isolated single umbilical artery, and the remaining 20% had only noncardiac defects, she noted.
02 pH units and samples from neonates with a gestational age <37 weeks, an umbilical artery pH <7.
Blood (6 mL) drawn from the umbilical artery within 2 min of cord clamping was immediately transferred to six 2-mL plastic syringes that had been flushed with a 1000 units/mL heparin solution (each syringe contained <0.
Doppler velocimetry of the uterine artery gives clinical information about maternal blood flow to the uterus, Doppler of the umbilical artery shows the degree of placental resistance, and middle cerebral artery Doppler can demonstrate fetal compensation or adaptation.
The AI patients had significantly lower rates of severe variable decelerations, operative deliveries, fetal distress, and higher umbilical artery pH values (Am.
A single umbilical artery, for example, has been reported to be associated with a whole range of gross anomalies, particularly cardiovascular, in 21%-76% of cases.
If you choose to use Doppler alone for monitoring, you must be able to do multivessel Doppler because the umbilical artery and middle cerebral artery provide unique information about the fetal condition.