3rd trimester and post-partum bleeding Flashcards
What is placenta previa?
Implantation of the placenta either partially or completely over the cervical os.
- Complete
- Partial
- Marginal
Which placenta previa types need C-section delivery?
Complete and most partials
What is placenta abruption?
Premature separation of the placenta from the uterine wall.
Illicit drug that can cause placenta abruption.
Cocaine
Main risk factor for a uterine rupture.
Previous C-section
What is the definition of post-partum hemorrhage?
Excess of 500mL blood loss after vaginal delivery
Excess 1000mL blood loss after C-section
Name and describe the 3 types of abnormal placenta attachments.
Accreta: attachment to the myometrium
Increta: invasion of the myometrium
Percreta: penetration thru the serosa or beyond
How much does maternal blood volume increase in pregnancy?
40%
What happens to maternal blood pressure and HR in pregnancy?
BP decreases
HR increases
Top 3 causes of maternal death in the U.S.
- Embolism
- Hypertensive Disease
- Obstetrical Hemorrhage
How much blood loss can occur in obstetrical hemorrhage before symptoms arise?
1000mL
2 most common causes of antepartum bleeding.
- Placenta Abruptio
2. Placenta Previa
What is important to remember before examining a patient with antepartum hemorrhage?
DO NOT check the cervix until placenta previa has been ruled out.
Most accurate means of determining cause of antepartum bleeding.
Ultrasound, very good at detecting placenta previa but not abruption
What should a physician considered if a patient had painful vagina bleeding antepartum that was temporarily relieved?
Uterine Rupture