rupture of the uterus
TRANSCRIPT
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RUPTURE OF THE UTERUS
FAHAD ZAKWAN
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INTRODUCTION Uterine rupture is a grave obstetric complication.
Associated with high
Maternal mortality
Perinatal mortality
It may occur
Labour
Delivery
Pregnancy – lesser extent
Every second of time is vital for survival
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Incidence of uterus rupture
•0.05% for all pregnancies
•0.8% after previous lower segment caesarean section(LSCS)
• >5% after classical caesarean section
• Scar dehiscence has an incidence of 0.6% in pregnancies with previous C/S and has a more favourable outcome for both mother and fetus than does uterine rupture.
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Definition•Separation of the muscular wall of the uterus
•Usually occurs during labor
•Occasionally happen during the later weeks of pregnancy
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Uterine rupture
Total disruption of the wall of the pregnant uterus with or without extrusion of its contents
Uterine scar dehiscence
Herniation of intact amniotic membrane into an existing uterine scar
Uterine scar rupture
Separation of the scar along its entire length often with involvement of the amniotic membranes
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•Uterine dehiscence involves myometrial separation at a site of uterine scar from previous surgery, and the uterine serosa remains intact.
•Uterine rupture, on the other hand, involves the entire thickness of the uterine wall, resulting in communication between the uterus and peritoneal cavities.
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•Uterine rupture: separation of an old uterine incision with rupture of the fetal membranes so that the uterine cavity and the peritoneal cavity communicate directly.
•Dehiscence of a scar does not involve rupture of the fetal membranes.
•Rupture is more acute while dehiscence is more gradual.
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CAUSESDuring pregnancy
•weak scar after previous operations on the uterus
•History of cesarean section (VBAC - vaginal birth after c-section)
•myomectomy
• excision of a uterine septum
•previous perforation of uterus(D&C, hysteroscopy, forceps delivery
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During labor:•uterine hyper-stimulation(oxytocin with pitocin induction
or augmentation of labor)
•obstructed labor(macrosomia, feopelvic dispropotion)
• intrauterine manipulation(internal version, manual removal of an adherent placenta)
• forcible dilatation(cervical tear)
• a weak scar(C-section or other operations)
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TYPES•Incomplete rupture•complete rupture
depending on whether the peritoneal coat is torn through or
not
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Traditional classificationComplete
▪The visceral peritoneum overlying the uterus is disrupted
Incomplete
▪Overlying peritoneum is intact
Not clinical relevant
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Etiological classification
Spontaneous rupture
Scar rupture
Traumatic rupture
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Spontaneous rupture
• Feto-pelvic disproportion• Congenital uterine anomalies• Soft tissue obstruction
Scar rupture
• Previous uterine surgery• Previous uterine perforation
PREDISPOSING FACTORS
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Traumatic/ iatrogenic ruptureSurgical intervention
Internal versionForceps deliveryManual removal of placentaDestructive operations
Medical interventionUterine stimulation
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Symptoms and signs•Abdominal pain and tenderness
• Shock
•Vaginal bleeding
•Undetectable fetal heart beat
•Palpable fetal body parts
•Cessation of contractions
• Signs of intraperitoneal bleeding
• The most common sign is the sudden appearance of fetal distress during labor
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•The signs and symptoms of uterine rupture in patients with a previous scarred uterus differ from patients without a uterine scar.•The most common sign in woman with uterine scar is lower abdominal
•In women without a scar, shock is the common sign, followed by uterine abdominal pain, and easily palpable fetal
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•Ultrasonography is probably the safest and most useful imaging technique during pregnancy.
•sonographic findings associated with includes:• Extra peritoneal hematoma• intrauterine blood• free peritoneal blood• empty uterus• gestational sac above the uterus• large uterus mass with gas bubbles
DIAGNOSIS
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TREATMENT
•Principles for the treatment of uterine rupture includes:•Intensive resuscitation•Emergency laparotomy•Broad spectrum antibiotics•Adequate post operative care
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Intensive resuscitation Correct hypovolaemia from…. Haemorrhage
Sepsis
Dehydration Intravenous broad spectrum antibiotics Cephalosporin + Metronidazole combination
Monitor to ensure adequate fluid and blood replacement
Blood volume expansion may worsen the bleeding from damaged vessel and
so the laparotomy should not be delay, once patient condition has improved
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Surgical options Hysterectomy Treatment of choice except any other compelling reasons
to preserve the uterus
Total
Sub-total Rupture repair Occasionally one may be forced to repair
Repair with sterilization Not an attractive option
May be useful especially in unskilled hands
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Outcome• Death from uterine rupture is not uncommon.
• Mortality appears to be higher in women who have an unscarred uterus and when the rupture occurs outside the hospital.
• Overall mortality: 15.9%
• Perinatal morbidity rate associated with uterine rupture ranges from 8-56%
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Preventive measures
Antenatal careHigh risk casesOxytocicsPrevious caesarean sectionAugmentation of labour
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NOTE!!!
•During trial of scar watch out for…….• Fetal heart abnormalities•Maternal tachycardia•Vague abdominal pain in between contractions• Suprapubic tenderness•Vaginal bleeding•Bladder tenesmus
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DIAGNOSTIC CRITERIA FOR UTRINE RUPTURE
Painful late trimester bleeding
Loss of FHT
Inability to identify UCs
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Thank you for your attention