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| *[[AKA]] ''two vessel cord''. | | *[[AKA]] ''two vessel cord''. |
| *[[AKA]] ''single umbilical artery''. | | *[[AKA]] ''single umbilical artery''. |
| | | {{Main|Two vessel umbilical cord}} |
| ===Associations===
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| *Associated with congenital abnormalities, esp. cardiac - '''key point'''.<ref name=Ref_WMSP464>{{Ref WMSP|464}}</ref>
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| **Thought to be an acquired defect (as prevalence is lower early in gestation).
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| *May be seen in association of other cord abnormalities (e.g. marginal insertion, velamentous insertion).
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| *In apparently well (liveborn) infants it is associated with (occult) renal abnormalities, specifically vesico-ureteric reflux; there is no evidence for other abnormalities.<ref name=pmid15613529>{{cite journal |author=Srinivasan R, Arora RS |title=Do well infants born with an isolated single umbilical artery need investigation? |journal=Arch. Dis. Child. |volume=90 |issue=1 |pages=100–1 |year=2005 |month=January |pmid=15613529 |pmc=1720078 |doi=10.1136/adc.2004.062372 |url=}}</ref>
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| *Associated with maternal [[diabetes]].<ref name=pmid7997408>{{cite journal |author=Lilja M |title=Infants with single umbilical artery studied in a national registry. 3: A case control study of risk factors |journal=Paediatr Perinat Epidemiol |volume=8 |issue=3 |pages=325–33 |year=1994 |month=July |pmid=7997408 |doi= |url=}}</ref>
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| | |
| ====Image====
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| <gallery>
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| Image:Single_umbilical_artery,_HE..jpg | Single umbilical artery. (WC/Patho)
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| </gallery>
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| www:
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| *[http://www.glowm.com/resources/glowm/graphics/figures/v2/1070/05b.jpg SUA (glown.com)].<ref>URL: [http://www.glowm.com/?p=glowm.cml/section_view&articleid=151 http://www.glowm.com/?p=glowm.cml/section_view&articleid=151]. Accessed on: 8 January 2011.</ref>
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| ===Sign out===
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| <pre>
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| PLACENTA, UMBILICAL CORD AND FETAL MEMBRANES, CAESAREAN SECTION:
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| - TWO VESSEL UMBILICAL CORD, NEGATIVE FOR INFLAMMATION.
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| - FETAL MEMBRANES WITHIN NORMAL LIMITS.
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| - PLACENTAL DISC WITH THIRD TRIMESTER VILLI WITHOUT APPARENT PATHOLOGY.
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| </pre>
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| | |
| ====With meconium====
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| <pre>
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| PLACENTA, UMBILICAL CORD AND FETAL MEMBRANES, CAESAREAN SECTION:
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| - TWO VESSEL UMBILICAL CORD, NEGATIVE FOR INFLAMMATION.
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| - FETAL MEMBRANES WITH FOCAL PIGMENTED CELLS CONSISTENT WITH MECONIUM,
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| NEGATIVE FOR APPARENT CHORIOAMNIONITIS.
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| - PLACENTAL DISC WITH THIRD TRIMESTER VILLI WITHOUT APPARENT PATHOLOGY.
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| </pre>
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|
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|
| ==Insertion== | | ==Insertion== |