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Difficulty: MediumObstetric Complications

An obstetrician is managing the vaginal delivery of a macrosomic fetus in a patient with gestational diabetes. After the fetal head is delivered, it immediately retracts tightly against the maternal perineum. Routine downward traction fails to deliver the anterior shoulder. Arrange the following clinical interventions in the correct sequential order, from the immediate first steps to the maneuver of absolute last resort, for managing this obstetric emergency.

  1. 1Instruct the patient to cease pushing and summon the obstetric emergency team.
  2. 2Perform hyperflexion of the maternal thighs against the abdomen alongside downward suprapubic pressure.
  3. 3Execute internal rotational maneuvers or manually deliver the posterior fetal arm.
  4. 4Replace the fetal head into the birth canal and proceed with an emergent cesarean delivery.

Answer

The correct sequential management begins with calling for help and stopping maternal pushing, followed by first-line external maneuvers (McRoberts maneuver and suprapubic pressure). If unsuccessful, the provider must progress to internal maneuvers (posterior arm delivery or rotational maneuvers), utilizing cephalic replacement (Zavanelli maneuver) and cesarean delivery only as a last resort.
Management of shoulder dystocia must follow a standardized, stepwise approach to minimize neonatal injury (e.g., brachial plexus palsy, hypoxia) and maternal trauma. Non-invasive external techniques are prioritized before progressing to invasive internal manipulation, with surgical replacement strictly held as the final option.

Step-by-Step Solution

1
Recognize the 'turtle sign' and halt pushing while calling for help.
Prevents worsening of the impaction and ensures adequate personnel are present.
Maternal pushing against an impacted shoulder increases the risk of brachial plexus injury.
2
Apply the McRoberts maneuver and suprapubic pressure.
Flattens the sacral promontory and aims to slide the anterior shoulder under the symphysis pubis.
These are the safest and most effective initial maneuvers to resolve the dystocia.
3
Proceed to internal maneuvers, such as the Woods corkscrew or delivering the posterior arm.
Reduces the shoulder diameter by physically manipulating the fetus.
Required when external biomechanical adjustments fail to relieve the obstruction.
4
Perform the Zavanelli maneuver followed by emergent laparotomy.
Returns the fetus to the uterus for surgical delivery.
Indicated exclusively for catastrophic, refractory shoulder dystocia to prevent asphyxia.

Key Concept

Sequential Management of Shoulder Dystocia
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Topics

Obstetric Complications

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