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前置胎盘

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前置胎盘 - PowerPoint PPT Presentation


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placenta previa. 前置胎盘. 胎盘. 宫体. 宫颈. definition.

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Presentation Transcript
slide1

placenta previa

前置胎盘

slide2

胎盘

宫体

宫颈

definition

definition

The normal placenta attaches to the anterior. Posterior or lateral wall of the uterine body . If it is attaches to the lower segment of the uterus, over the cervical os, lower than fetal presentation, it is called placenta previa.

etiology
etiology
  • Scarred or poorly endometrium or infection
  • placenta is large than normal
  • abnormal placenta
  • the fertilized ovum develops slowly
classification
Classification
  • Complete placenta previa
  • partial placenta previa
  • marginal placenta previa
clinical manifestations
Clinical manifestations
  • Mean symptoms

causeless

hemorrhage painless

(all the 3rd trimester) repeated

  • signs
diagnosis
diagnosis
  • history
  • signs
  • vaginal examination
  • ultrasound examination
  • inspection placenta after labor
differential diagnosis
Differential diagnosis
  • Placental abruption
  • others: cervical disease

(cervical polyps; erosion or

carcinoma of cervix ; cervicitis)

rupture of marginal sinus

( 边缘窦破裂)

rupture of vasa previa

(血管前置破裂 )

influence on mother and fetus
Influence on mother and fetus
  • Maternal hemorrhage shock
  • placenta accreta(胎盘植入)
  • puerperal infection
  • premature delivery and fetal death
prevention
Prevention
  • prevent injury of endometrium
  • consult on time
  • treat correctly
treatment
treatment
  • Expectant therapy
  • terminating pregnancy
  • preventing infection
expectant therapy
Expectant therapy
  • Expectant theray

A indication : <37w

<2300g 

bleeding is little in amount

B methods: hospitalization

valium

to correct anemia

inhibiting to uterine contraction

improving maturity of fetal lungs

terminating pregnancy
terminating pregnancy
  • cesarean section
  • vaginal delivery