VAGINAL BREECH DELIVERY Flashcards
Define breech presentation
Breech presentation occurs when the fetus lies longitudinally with the buttocks presenting in the lower pole of the uterus
the most common form of malpresentation in pregnancy
breech presentation
Percentage of breech at term
3 - 4%
Percentage of breech with premature delivery
25%
Flexed hips, extended knees bilaterally
FRANK (EXTENDED BREECH)
Both hips / knees flexed
COMPLETE BREECH
Describe FOOTLING BREECH
One (single footling, breech) or both (double footling breech) legs extend below level of buttocks
Another name for frank breech
Extended breech
Flexed hips, extended knees bilaterally
Another name for complete breech
Flexed breech
Both hips / knees flexed
5 fetal causes of breech presentation
- Prematurity
- Fetal malformations
–Hydrocephalus/anencephaly - Polar placentation
–Cornual
–Praevia - Genetic disorders (causing fetal hypotonia)
–Trisomies 13, 18, 21
–Potter syndrome
–Myotonic dystrophy - Abnormalities of liquor volume
–Polyhydramnios
–Oligohydramnios
4 maternal causes of breech presentation
- Pelvic tumours
- Uterine anomalies (recurrent breech presentation)
– Bicornuate/septate uterus - Contracted pelvis
- High parity
3 clinical examinations for the diagnosis of breech presentation
- Leopold’s manouvre
—Firm, rounded fetal head
ballotable in fundus - Fetal heart audible above
umbilicus - Pelvic examination
—Soft irregular breech
ULTRASOUND CONFIRMS DIAGNOSIS AND EXCLUDES:
Placenta praevia
Multiple pregnancy
Skeletal abnormalities
Hydrocephalus
Spina bifida
Fetal ascites
Abdominal tumours
T/F: Ultrasound Scan confirms degree of extension/flexion of fetal head
T
T/F: X-ray can be used in the diagnosis of breech in the absence of USS
T
Antepartum management of breech involves – and –
Anticipate spontaneous version
Counsel on risks of delivery options
3 modalities of breech management
External cephalic version
Elective caesarean section
Planned vaginal delivery
ECV is employed for – and –
Singleton breech
Non-vertex second twin
At what GA is ECV performed
36 - 37 weeks
5 Requirements for ECV
- Ultrasound
2 Cardiotocographic monitoring - Tocolysis (controversial)
- Regional Anesthesia—optional
- Facilities for caesarean section
Mean success rate of ECV
60%
T/F: Higher success of ECV in Africans
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Success rate of ECV
35 – 85%
6 Factors Associated with failure of ECV
Obesity
Engagement of the breech
Oligohydramnios
Posterior positioning of fetal back
Fibroids
Congenital uterine anomalies
8 Complications of ECV
Feto – maternal transfusion
Placental abruption
Uterine rupture
Cord accident
Amniotic fluid embolism
Preterm labour/rupture of membranes
Fetal distress
Fetal demise
3 risks of vaginal breech delivery compared with cephalic delivery
Cord compression/prolapse
Difficulty in delivering shoulders
Difficulty in delivering the head
9 antepartum criteria for vaginal breech delivery
- Frank breech presentation
- Gestational age ≥ 34 weeks
- Estimated fetal weight of 2000 –
3500g - Flexed fetal head
- Normal clinical/radiological
pelvimetry
–Inlet: Transverse
11.5cm/AP10.5cm
– Cavity: Transverse
10.0cm/AP 11.5cm - No indication for caesarean
section - Previable fetus
- Congenital anomaly
- Presentation in advanced labour
For vaginal breech delivery GA should be
≥ 34 weeks
For planned vaginal breech delivery the EFW should be
2000 – 3500g
For planned vaginal breech delivery the transverse and AP diameter of the pelvic inlet should be
Transverse 11.5cm/AP10.5cm
For planned vaginal breech delivery the transverse and AP diameter of the pelvic cavity should be
Transverse 10.0cm/AP 11.5cm
For planned vaginal breech delivery the type of breech should be
Frank breech presentation
T/F: The fetal head should be flexed for planned vaginal breech delivery
T
9 aspects of intrapartum management of breech vaginal delivery
- Normal progression first/second
stage - Avoidance of
induction/augmentation - Avoidance of breech extraction
- Continuous electronic fetal
monitoring - Policy of non-interference until
spontaneous delivery of breech
up to the umbilicus - Early recourse to caesarean
section - Theatre must be available
- Anesthesia must be available
- Informed consent
In the intrapartum management of vaginal breech delivery, there should be Policy of non-interference until
spontaneous delivery of breech up to the umbilicus
9 indications for CS with breech presentation
- If the Estimated Fetal Weight is
< 1.5KG OR > 3.5kg - Contracted or Borderline
Maternal Pelvis - Prolonged rupture of
membranes - Footling Breech
- Unengaged presenting part
- PRIMIGRAVIDA
- Hyperextended head
- Poor obstetric history
- Any other routine indication for
CAESAREAN DELIVERY
EFW for CS in breech presentation
</= 1.5KG OR >/= 3.5kg
3 methods of vaginal breech delivery
Spontaneous breech delivery
Assisted breech delivery
Breech extraction
Spontaneous Breech Delivery is
Delivery without assistance or obstetric manoeuvres to the baby’s body
Assisted Breech Delivery involves
The fetal body being guided through the birth canal by a series of properly-timed manoeuvres to deliver various parts of the body safely, taking advantage of maternal expulsive efforts
Breech Extraction involves
The whole of the fetal body being extracted by the accoucheur without the assistance of maternal efforts
When is Zatuchni Andros scoring system used in vaginal breech delivery
if unbooked or if the Breech Presentation is just being diagnosed in labour
T/F: The assessment of Zatuchni Andros score is designed to be made at the onset of labour
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The 6 indices assessed in the Zatuchni Andros prognostic score are
- Parity
- Previous vaginal breech delivery
(baby >2.5kg) - Gestational age
- Estimated fetal weight
- Cervical dilatation
- Station
The highest possible score in Zatuchni scoring system is
11
The highest point for any one criteria in the zatuchni scoring system is
2
The lowest point for any one criteria in the zatuchni scoring system is
0
The possible points for parity in the zatuchni scoring system are
Primigravida = 0
Multigravida = 1
The points assigned to gestational age in the zatuchni scoring system are
> /=39 weeks — 0
38 weeks — 1
</=37 weeks — 2
38 weeks GA has a score of — in the Zatuchni scoring system
1
A score of 1 for GA in the ZAS is for
38 weeks
A score of 2 for GA is assigned for — in ZAS
</=37 weeks
When is a score of 0 assigned for GA in ZAS
> /= 39 weeks
All indices in ZAS can have points 0, 1 or 2 except for which index
Parity which has either point 0 for primigravidity or 1 for multigravida
A point of 2 for EFW in ZAS is for
<3.1kg
A point of 1 for EFW in ZAS is for
3.1 to 3.6kg
A point of 0 for EFW in ZAS is for
> 3.6kg
For previous vaginal breech delivery in ZAS, point 0 is for
None
For previous vaginal breech delivery in ZAS, point 1 is for
one previous breech delivery
For previous vaginal breech delivery in ZAS, point 2 is for
2 or more previous breech deliveries
A score of 2 for cervical dilation in ZAS is for
4cm or more
A score of 0 for cervical dilation in ZAS is for
2cm dilation
A score of 1 for cervical dilation in ZAS is for
3cm dilation
For station in ZAS 0 point is for
-3 station
For station in ZAS 1 point is for
station -2
For station in ZAS 2 points is for
station -1 or lower
A total score of 6 and above in ZAS indicates
a reasonable chance for a successful vaginal delivery.
— total score in ZAS indicates a need for CS
</=3
A total score of 4 or 5 in ZAS indicates
a need for careful review of the mode of delivery. Explain the risk of proceeding with vaginal delivery to the parturient and consent. Otherwise, plan for caesarean delivery.
The easiest maternal position for intrapartum management of vaginal breech delivery is
propped -up dorsal position
When should the mother assume lithotomy position in vaginal breech delivery
after delivery of the baby’s body
The manoeuvre for delivering extended legs in assisted vaginal breech delivery
Pinnard’s manoeuvre
The manoeuvre for delivering nuchal arms in assisted vaginal breech
Lovset manoeuvre
3 indications for breech extraction
Delivery of the second twin in twin gestation.
Delay in the second stage of labour with fetal compromise, or
A dead fetus
T/F: Do not augment a patient with dysfunctional labour during breech delivery
T
as this might be a pointer to underlying complications with subsequent poor outcome.