Placenta previa

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Background

- placenta improperly positioned between cervic and baby. can be

total, partial or marginal

- tx c c section

- hem from early separation of placenta from ut- due to gradual

thinning of cervix in anticipation of delivery. can also be by

physical exertion, labor, local trauma (intercourse, speculum exam).

- assoc with intrauterine growth retardation, congenital

abnormalities, and placenta prev.


Risk Factors

- c section

- previous pl previa

- twins

- D&C

-muliparous

- scarring of uterus with no place for placenta to attach except at

botton near cervix


Diagnosis

- painless bright red blood

- exam only with double set up in OR by obstetrician

- in ER use abd utz

- 90% of prev dx before 20 wks will have placnta that migrates away

from cervix or lower ut segmnt will grow more


Treatment

- c section

- if fetus not viable, tx in hospital until viable then c section