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Occiput Posterior

Aka: Occiput Posterior, Occipitoposterior Malpresentation, OP Presentation
  1. See Also
    1. Fetal Position
    2. Fetal Malpresentation
    3. Fetal Presentation
    4. Fetal Lie
    5. Twin Gestation
    6. Occiput Posterior
    7. Breech Presentation
    8. Face Presentation
    9. Brow Presentation
  2. Definition
    1. Abnormal Fetal Position with occiput at maternal Sacrum
    2. Fetal face towards maternal Symphysis Pubis
  3. Epidemiology
    1. Represents 10% of Fetal Positions
  4. Physiology
    1. Less favorable fetal head diameter for delivery
      1. Deflexion of fetal head
      2. Posterior presentation
    2. Usually corrects spontaneously
      1. Rotates to Occiput Anterior position in 90% of cases
  5. Symptoms
    1. Back labor
    2. Prolonged labor
      1. Nulliparous: Additional two hours
      2. Multiparous: Additional one hour
  6. Signs: Digital cervical exam
    1. Asymmetric cervical dilation
      1. Persistant anterior lip
    2. Palpation of fetal head
      1. Fetal anterior Fontanel most palpable
      2. Follow sagittal Suture to posterior Fontanel
      3. Posterior Fontanel, lambdoid Suture with be posterior
  7. Complications
    1. Failure to Progress
    2. Extended episiotomy or perineal Laceration
  8. Management
    1. Spontaneous Delivery (anticipate in 45% of cases)
    2. Maternal position changes (unclear efficacy)
      1. Any position in which mother curls forward from hips
      2. Hands and knees
      3. Squatting
    3. Manual rotation during vaginal exam
      1. See Manual Rotation in Occipitoposterior Presentation
    4. Vacuum Delivery
      1. Place vacuum cup as posterior as possible
        1. Inproves flexion of fetal head
      2. Do not use vacuum to rotate fetal head
        1. Results in Scalp Laceration
    5. Forceps Delivery
    6. Forceps Rotation (skilled clinician only)
      1. Techniques: Scanzoni or Kielland
      2. Requires immediate Ceserean back-up
      3. Rarely performed in U.S. now

fetus or newborn affected by persistent occipitoposterior position (C0270060)

Concepts Pathologic Function (T046)
SnomedCT 60949004, 206114009
English Fetus born-persist.occip-post., Fetus or neonate affected by persistent occipito-posterior malposition during labor and delivery, Fetus or neonate affected by persistent occipito-posterior malposition during labour and delivery, Fetus/neonate affect persistent occip-posterior - labor/del, Fetus/neonate affect persistent occip-posterior - labour/del, fetus / newborn affected by persistent occipitoposterior position, fetus or newborn affected by persistent occipitoposterior position (diagnosis), fetus or newborn affected by persistent occipitoposterior position, Fetus OR newborn affected by persistent occipitoposterior position (disorder), Foetus or neonate affected by persistent occipito-posterior malposition during labour and delivery, Fetus OR newborn affected by persistent occipitoposterior position, Fetus or neonate affected by persistent occipito-posterior malposition during labor and delivery (disorder), occipitoposterior position; persistent, affecting fetus or newborn, persistent; occipitoposterior position, affecting fetus or newborn, Fetus or newborn affected by persistent occipitoposterior position
Spanish feto o neonato afectado por posición anómala occipitoposterior persistente durante el trabajo de parto y parto (trastorno), feto O recién nacido afectado por posición occipitoposterior persistente, feto o neonato afectado por posición anómala occipitoposterior persistente durante el trabajo de parto y parto, feto O recién nacido afectado por posición occipitoposterior persistente (trastorno)
Dutch occipitoposterieure ligging; persisterend, gevolgen voor foetus of pasgeborene, persisterend; occipitoposterieure ligging, gevolgen voor foetus of pasgeborene
Sources
Derived from the NIH UMLS (Unified Medical Language System)


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