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rupture of the membranes: preterm premature (pprom)


Rupture of the Membranes: Preterm Premature (PPROM) CPG

Rupture of the membranes prior to 37 completed weeks gestation

and

prior to the onset of labour.




Management


Admit to birth suite

Diagnosis


The diagnosis can usually be made on clinical grounds by a combination of history and the identification of amniotic fluid in the vagina on speculum examination.
  • All women presenting with a history of PPROM must have a sterile speculum examination
  • A digital vaginal examination should NOT be performed
  • Ultrasound examination showing markedly reduced liquor volume in the presence of normal fetal kidneys and the absence of IUGR is highly suggestive of ROM, however normal liquor volume does not exclude the diagnosis
  • If the diagnosis is in doubt, the patient may be admitted for pad checks

Evaluation


  • General examination including pulse and temperature
  • Abdominal examination
  • Sterile speculum examination
  • Confirm the diagnosis
  • Collect cervico-vaginal swabs for microscopy and culture
  • Collect low vaginal and ano-rectal swabs for GBS
  • CTG
  • FBE
  • A cervical suture, if present, should be removed immediately and submitted for culture
  • Birth suite ultrasound examination if presentation is in doubt


Prophylaxis of neonatal respiratory distress syndrome


All women with PPROM <34 weeks gestation should be administered corticosteroids betamethasone injection 11.4mg IM Daily - 2 doses, 24 hours apart (Celestone Chronodose™)

Tocolysis


Where there is no evidence of infection, the gestation is <34 weeks and corticosteroids have not been completed, if contractions are occurring, tocolysis in order to complete the corticosteroids is reasonable. Refer CPG Labour: Preterm Tocolysis

Continuing management


Delivery


  • Where the gestation is > 36 weeks at presentation, induction of labour (if there are no contraindications to vaginal delivery) should be commenced at the next convenient opportunity (Refer CPG Premature Rupture of Membranes at Term).
  • If the woman is GBS positive, consideration should be given to prompt induction of labour from 32 weeks.
  • In women who are being managed conservatively (see below), delivery should be effected if there is evidence of intrauterine infection, or when the gestation reaches 36 weeks.

Antibiotics


  • Prophylactic antibiotics improve the outcome in PPROM. The drug of choice is erythromycin 250 mg orally qid

Surveillance for infection, growth


  • Clinical observations
  • 4/24 temperature, pulse
  • Assessment of PV Loss
  • Assessment of abdominal pain or tenderness

  • FBE weekly
  • CTG twice per week
  • Weekly assessment of fundal height
  • Formal ultrasound examination initially, then every fortnight

Outpatient management


  • All women should be observed in hospital for 72 hours. If they remain well and are not in labour, they can then be discharged for outpatient management. The woman would be instructed to take her temperature t.d.s., observe PV Loss and be aware of fetal movements - returning if there are reduced fetal movements felt. They should be seen once each week in the PDCC and once each week in the antenatal clinic (complex care) with the above surveillance performed at each visit.

  • Women who are referred to the hospital as in-utero transfers can be transferred back to the referring hospital at 34 weeks.

Special circumstances


PPROM remote from term


PPROM at <22 weeks poses special problems. The survival rate in these fetuses is about 20%. While the latency period is usually increased, the fetus is at risk of pulmonary hypoplasia. There is no reliable method for predicting this outcome. Immediate delivery is a reasonable option to discuss in these circumstances at consultant level.


Audit


Management of preterm prelabour rupture of mambranes: an audit. How do the results compare with clinical practice guidelines? Australian and New Zealand Journal of Obstetrics and Gynaecology 2005; 45: 201-206


Royal Women's Hospital Clinical Practice Guidelines (CPGs) are intended to provide guidance to health care professionals, based on a thorough evaluation of research evidence, on the practical assessment and management of specific clinical issues or situations. The guidelines allow some flexibility on the part of the health care professional based on the needs of the specific patient for whom they are caring.

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