Obstetrics Book

Uterine Disorders

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Vaginal Birth after CesareanAka: Trial of Labor after Cesarean, VBAC, TOLAC

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  1. Criteria (ACOG)
    1. One or two prior low-transverse cesarean sections
    2. Adequate pelvis for delivery
    3. No contraindication below
    4. Physician immediately available during active labor
      1. Capable of monitoring labor
      2. Immediate cesarean delivery available
  2. Contraindications
    1. Prior classic or T-shaped incision
    2. Prior transfundal uterine surgery
    3. Uterine scar other than low-transverse cesarean scar
    4. Contracted pelvis
    5. Medical or obstetric complications preclude VBAC
    6. Criteria above not met
  3. Precautions
    1. Cervical Ripening agents have higher risk of rupture
      1. Contraindicated in VBAC patients
  4. Complications (VBAC considered to be relatively safe)
    1. Uterine Rupture (38 per 10,000 trials of labor)
      1. See Uterine Rupture for risks
    2. Perinatal death (1.4 per 10,000 trials of labor)
    3. Hysterectomy (3.4 per 10,000 trials of labor)
    4. References
      1. Guise (2004) BMJ 329:19
  5. References
    1. (1999) Int J Gynaecol Obstet 66:197

Vaginal Birth after Cesarean (C0080301)

Definition (MSH)Delivery of an infant through the vagina in a female who has had a prior cesarean section.
ConceptsTherapeutic or Preventive Procedure (T061)
MSHD016064
EnglishVaginal Birth after Cesarean, Vaginal Birth after Cesareans, Vaginal Births after Cesarean, VBAC
Parent ConceptsObstetric Delivery (C0011209)
SourcesCOSTAR, MSH
Derived from the NIH UMLS (Unified Medical Language System)



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