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7/17/2019 Topic List Placenta Previa
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Supervisor : dr. Pim Gonta, Sp. OG
PLACENTAPREVIA
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GENERAL CONSIDERATIONS
Placenta Previa : A placenta implanted over / verynear the internal cervical ostium (after 28 weeks)
: !"" for women 19 years or youner and is in "" for women older than !"
"#! $ mortality in Antepartum #aemorrhae
in %"" &irt's (only 2$% are complete)
9$% of patients will &e parous'
Grand mu(tiparas
hiher incidence : 1 in 2$'$ percent hiher in multifetal gestations
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CLASSI)ICATION
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ETIOLOG*
+u(tiparit
Advan-in ae
Previous SC de(iver
A lare placenta
A&normal forms ofplacentation (i'e'succenturiate lo&e)
ultiple estation
*moke +iarettes(increased twofold inwomen who smokedciarettes )
/(eedin in placenta previa could &e
caused &y:1' echanical separation of the
placenta from its implantation site,
2' Placentitis, or
!' -upture of poorly supported venous
lakes in the decidua &asalis
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SmptomsPain(ess vaina( &(eedin 01"$2*pontaneous,After coitus
.he most characteristic symptomate prenancy (after the 28th week) and
delivery+haracteristics: sudden, painless and
profuse
Contra-tions
No smptoms-outine ultrasound 0ndin
Anemia or s'o-3
-epeated &leedin anemia#eavy &leedin shock
A&norma( 4eta( positionA hih presentin part
reech presentation (often)
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P'si-a( )indins
leedin on speculum e3am
+ervical dilation
A&normal position/lie
4on5reassurin fetal status6f sini0cant &leedin: .achycardia
Postural hypertension*hock
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Dianosis5istorPainless hemorrhaeAt late prenancy or delivery#istory of curettae or +aesarean *ection
Sins7terus is soft, rela3ed and nontender'+ontraction may &e palpated'A hih presentin part cant &e pressed
into the pelvic inlet' reech presentation
etal heart tones may&e disappear(shock or a&ruption)
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Dianosis
Spe-u(um e6amination-ule out local causes of &leedin, such
as cervical erosion or polyp or cancer'
Limited vaina( e6amination0se(dom used2Palpation of the vainal fornices to
learn if there is an intervenin
&oiness &etween the forni3 andpresentin part'
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Dianosis
7(trasoundA&dominal 9"% accurate to
detect
.ransvainal (.7*) will detectalmost all+onsider what placental location a .7* may 0nd that
was missed on a&dominal
+RI
C'e-3 t'e p(a-enta andmem&rane a4ter de(iver
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DI))ERENTIALDIAGNOSIS
PLASENTA PREVIAvs
A/R7PTIOPLASENTA
Painless
Appears less distress
A&domen is soft, non tender
etal parts easily felt
A&normal presentation
7sually normal +.; 4o coaulation defects initially
4o Association with Pre5<clampsia
Painful
Appears more distress
A&domen is tensed, tender
etal parts di=cult to feel
4ormal presentation
A&normal +.; more likely +oaulations defects may occur early
Association with Pre5<clampsia
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P(a-enta previa
&ruptio p(a-enta
P(a-enta a--reta
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+ANAGE+ENT
>epends on:amount of uterine &leedin
duration of prenancy and via&ility of the fetus
deree of placenta previapresentation, position, and station of the fetusravidity and parity of the patient
status of the cervi3
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+anaement
6nitial evaluation/dianosis
?&serve/admit to @>
6 access, routine (may&e serial) la&s
+ontinuous electronic fetal monitorin+ontinuous at least initallyay re5evaluate later if sta&le, no further
&leedin
>elivery
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+anaement Less t'an 89 3s estation # e6pe-tant
manaement i4 sta&(e, reassurined rest (neotia&le)
4o vainal e3ams (not neotia&le)
*teroids for lun maturation (B!2 wks)
Possi&le manaement at home after 1st &leedC$% will have recurrent vainal &leedin
&efore !D completed weeks reEuirinemerent cesarean
89; ee3s estation+esarean delivery if positive fetal lun
maturity &y amniocentesis
>elivery vs e3pectant manaement if fetallun immaturity
*chedule cesarean delivery at !C weeks
Note:
ivensta&(ematerna(
andreassurin4eta(status,none o4t'ese
manaementuide(inesarea&so(ute0t'is is 'O&stetri-s
is so mu-'4un<2
Placenta previa accreta is found, hemostasis may necessitatea total h sterectom '
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Treatments
E6pe-tant t'erap-est: keep the &ed+ontrollin the contraction: *? .reatment of anemia
Preventin infection
Termination o4 prenan-Caesarean Se-tionVaina( de(iver
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De(iverCesarean Se-tion
delivery method ofchoice with placentaprevia'
.otal placenta previa(!Dth week), Partialplacenta previa (!Cthweek) and heavy&leedin with shock
#ypovolemic shock administration of 6 Fuidsand &lood &efore theoperation is started'
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Vaina( De(iver
ainal delivery marinal implantation
cephalic presentation'
G limited vainal &leedin
?3ytocin &efore amniotomy .amponade
onitorin #- a&normalities +*
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CO+PLICATIONS
Puerperal infection and anemia are the most likely
postoperative complications'
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PROGNOSIS
eternal :ortality has fallen BB 1 in 1$$$rapid recourse to cesarean section,&anked &lood and
e3pertly administered anesthesiaetal: Perinatal mortality rateplacenta previa has declined to appro3imately
1%'
reduced if ideal o&stetric and new&orn care isiven'