Ch 56 Umbilical Cord First 1/2 PPT

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created 3 years ago by Brittanydms
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1

5

omphalomesenteric

Wharton’s jelly

Development:

  • Forms during 1st ___ weeks of gestation
  • By the fusion of the ______(yolk stalk) and Allantoic ducts.
  • Surrounded by ____ ____
  • Connective tissue covering protects vessels from compression
2

7th

11th

Vein

Arteries

Umbilical Cord:

  • Intestines herniate into cord at approx. __ week
  • Return at approx. end of ___ week
  • Cord has 1 large vein & 2 smaller arteries
  • ___ transports oxygenated blood to fetus
  • _____ return deoxygenated blood to placenta
3

ductus venosus

Rt

ductus venosus

  • Blood flows from the L portal vein:
    • Through the ____ ____ to the systemic veins bypassing the liver or

OR

  • Through the __ portal sinus to the R portal vein
  • The ____ ____ forms the conduit betw. the portal system and the systemic veins.
4

thin; echogenic

  • Sonographically: the ductus venosus appears as a ___ intrahepatic channel with _____ walls
  • Ductus venosus-patent during fetal life, but turns into ligamentum venosum shortly after birth
  • Where is the ligamentum venosum?
5

adjacent

superior vesical

Umbilical Cord

  • Umbilical arteries travel ____ to the bladder to the iliac arteries
  • Sonographically: Color can be used to identify them
  • Postpartum, the umbilical arteries become the ____ _____ arteries.
6

20-50

mortality

Single Umbilical Artery:

Associated with:

  • congenital anomalies (__-__% cases)
  • ^ risk IUGR
  • ^ risk perinatal _____
  • ^ risk chromosomal abnormalities (Trisomies 18, 13, 21, Turner’s syndrome, triploidy)
7

23

19

20

10

8

Single Umbilical Artery:

Other organ systems may be affected:

Musculoskeletal (__%) Cardiovascular (__%)

Genitourinary (__%) Gastrointestinal (__%)

CNS (_%)

8

40-60

enfolding

—Umbilical Cord:

Normal length: __-__ cm

—Short cords (<35 cm.) can occur:

  • —secondary to failure of embryonic _____
  • —when there is decreased fetal movement as a result of a CNS or musculoskeletal abnormality
9

space

oligohydramnios

Umbilical Cord:

Short cords can occur:

  • restricted ____
  • ______
  • tethering of fetus by amniotic band
  • inadequate fetal descent
10

compression

distress

Umbilical Cord:

Short cords can occur:

  • cord _____
  • intrinsic fetal anomaly
  • limited space as in multiple gestations
  • fetal ____
11

80

25

true

compression

False

Abnormally long cord (>__cm) may be assoc. with:

  • Polyhydramnios
  • Nuchal cord (__% deliveries-most common fetal entanglement)
  • ___ knots- may result from torsion of the cord, which forms a loop through which the fetus may slip to form a knot
  • Cord _____, stricture or torsion may lead to fetal distress
  • ____ knots- focal redundancy of the vessels