Glines bleeding Flashcards
What is Nitabuch’s layer?
another term for decidua basalis? Absence of this layer may lead to weird placental attachements i.e. accreta
What are the trends in childbirth death rate and cerebral palsy?
death rates at childbirth have significantly decreased, cerebral palsy has not
Define the 3 types of placenta previas
complete = completely covers the os, incomplete = partially covers os, marginal previa = margin of placenta encroaches on margin of os
How is a low lying placenta different from a placenta previa?
low lying placenta is a placenta that forms low in the uterus but does not cover or touch the os
What placental issue is there an increased risk for in a woman using crack cocaine?
placental abruption
What is a complete separation of uterine musculature through all layers, what previous procedure puts one at increased risk for this?
uterine rupture, prior casearian
Is more blood lost in vaginal delivery or casarean?
casarean loses 1000 whereas vaginal only 500 ml
When the vessels of the umbilical cord insert between the layers of the amnion and chorion but away from the placenta, this is called ________
velamentous cord insertion
What is vasa previa?
When there is velamentous cord insertion but they pass over the os and predispose to rupture
Aside from the aorta, what artery in a pregnant woman is particularly dangerous to rupture in a trauma situation?
uterine artery, it has a much higher blood flow than a non pregnant woman’s uterine artery
What happens to total peripheral resistance in pregancy?
decreases
What are the 2 most common causes of antepartum bleeding?
placenta previa and placenta abruptio
When doing a physical exam, you must rule out this to before checking uterine tenderness?
placenta previa
What is the most accurate means of determining the cause of bleeding
ultrasound
What % of placental abruptions does ultrasound miss?
50%
What accounts for 20% of all antepartum bleeding?
placenta previa
In which type of placenta previa may you still be able to do a vaginal delivery?
a marginal one because the head of the fetus may tamponade off the margin of the placenta near the os without compromising fetal blood flow entirely