Introducing
Your new presentation assistant.
Refine, enhance, and tailor your content, source relevant images, and edit visuals quicker than ever before.
Trending searches
Types of Placentas!
10
References
Normal
- Disc/Pan cake shaped
- wt : 500g
- 15-20 cm in dm
- 1.5-3 cm thick
- important : involved in Metabolic, Circulatory, Respiratory & Endocrine functions.
- Has : Maternal and Fetal side
Types of Placentas!
- https://embryology.med.unsw.edu.au/embryology/index.php/Placenta_-_Abnormalities#Placenta_Variants
- http://nursingcrib.com/nursing-notes-reviewer/maternal-child-health/anomalies-of-the-placenta/
- http://www.dovemed.com/diseases-conditions/accessory-lobe-placenta/
- http://forums.thebump.com/discussion/9105452/circumvallate-placenta
Dx - US, but mostly are goes undiagnosed until deivery
Tx - after delivery or during pregnancy -> symptomatic treatment
- increase surveilance and support for these patients
Bi-lobed
Placenta Succenturiata
Battledore placenta
- Placenta with two equal-sized lobes connected by a thin bridge.
- Vessels of fetal origin extend from one lobe to another before uniting to form the umbilical cord.
: Vasa previa *
-Cord is inserted at or nearby the placental margin rather than the center.
: Umbilical cord is inserted directly to the fetus instead of the placenta, so the cord travels to the membranes of the placenta where the exposed vessels are not protected by Wharton's jelly, posing a high risk of rupture --> hemorrhage
: IUGR bx of decreased
blood flow to the fetus
- One or more accessory lobes are connected to the main placenta by blood vessels.
- Accessory lobe is normally smaller.
- occurs in 2/1000 pregnancies
- cause : non involution of some of the chorionic villi.
- Vessels connecting both lobes may rupture --> fetal compromise
- Risk of vessel rupture during delivery --> massive blood loss.
- Small lobes can retain in the uterus : severe maternal hemorrage.
: Tissue connecting both lobes may tear and placental
remnants may remain in the uterus --> extract them / D&C after delivery --> Transfusion
Placenta Membranacea
Circumvallate - folding in of placenta
- Chorionic plate is smaller than basal plate, so the amnion and the chorion membranes 'double back' around the edges.
All of the placenta are covered with functioning villi and the placenta develops as a thin membranous structure occupying the entire periphery of the chorion, covering most or entire uterine wall
- May produce painless vaginal bleeding in 2nd/ 3rd trimester
: Placenta previa or accreta, increta
or percreta.
: Still birth, Pre-term delivery ,
NN death.
- Rare - 1% of all pregnancies
: Umbilical cord enters the placenta at the normal site, BUT blood vessels end abruptly at the point where the chorion folds back to the surface --> decreased blood supply --> IUGR
: Placental abruption *
: Miscarraige
: Pre term birth