Is this Medical School Again?
This increases by 40-50% in pregnancy.
What is plasma volume?
This is the percentage of previas that will resolve by delivery.
What is 90%?
This is the diagnosis of a vasa previa.
What is umbilical cord over or within 2 centimeters of the cervical os?
The defective layers the placenta attaches to
What is the decidua basaltic and fibrinoid layer?
Name 3 risk factors for a placenta abruption.
What is
prior abruption, tobacco use, increased parity, increased age, cocaine or meth use, trauma, hypertension, structural anomalies, PPROM, IAI, rapid decompression (twin delivery or AROM of poly)
Vasodilation leads to this in pregnancy
What is decreased SVR?
This is the largest risk factor for having a placenta previa.
What is a history of a prior previa?
This is the definition of a type 1 vasa previa.
What is velamentous or marginal cord insertion?
These are three findings one may see on an ultrasound
What is lacunae, hypervascularity and thin myometrium?
What is the pathophysiology behind an abruption
What is defective maternal vessels in the deciduous basali?
What is 1500cc?
In persistent previas, this is the percentage that a bleed will occur before 30 weeks.
What is 33%?
This is the definition of a type 2 vasa previa.
What is membranous vessels between bilobed placenta or succenturiate lobed placenta?
Name the two biggest risk factors for an accreta.
What is history of uterine surgery and placenta previa?
The activation of thrombin leads to this phenomenon.
What is uterine contractions?
These factors all increase in pregnancy.
What is factor I, II, V, VII, VIII, X and XII?
Delivery timing for a stable previa.
What is 36-37 weeks?
These are 3 common risk factors for a vasa previa.
What is velamentous cord insertion, bilobed or succenturiate placenta and LLP/placenta previa?
Bonus: IVF, multi-fetal
This is the risk of an accreta in a pregnancy with a placenta previa and 3 prior c-sections.
What is 61%?
This is the increased mortality for the fetus.
What is 10x?
The body’s response to a blood loss of 20%
What is decreased blood pressure, increased heart rate and decreased cardiac output?
This intervention or medication in the prenatal period may prevent postpartum complications.
What is iron and vitamin C?
This is the risk of a vasa previa in the general population.
What is 1 in 1300 to 1 in 2500?
This grade refers to invasion of the serosa
What is Grade 3a?
These findings can be seen later on in the neonates life as a result of an abruption.
What is periventricular leukomalacia and neurobehavioral development issues?