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Difficulty: HardLabor, Delivery, and Puerperium

A 32-year-old multiparous woman at 40 weeks gestation with diet-controlled gestational diabetes is in the second stage of labor. Following the delivery of the fetal head, the head rapidly retracts tightly against the maternal perineum. Gentle downward traction fails to deliver the anterior shoulder. Arrange the following management steps in the correct sequential order according to standard stepwise escalation protocols for this obstetric emergency, proceeding from the initial response to maneuvers of last resort.

  1. 1Request additional obstetric and pediatric assistance while instructing the patient to stop pushing.
  2. 2Hyperflex the maternal thighs against the abdomen and apply downward suprapubic pressure.
  3. 3Perform internal vaginal maneuvers, such as rotational maneuvers or delivery of the posterior arm.
  4. 4Deliberately fracture the fetal clavicle.
  5. 5Perform cephalic replacement into the pelvis and proceed to emergent cesarean delivery.

Answer

The correct sequence for managing shoulder dystocia escalates from non-invasive immediate responses to internal maneuvers, followed by salvage procedures, and ending with last-resort heroic measures: Call for help -> McRoberts/Suprapubic pressure -> Internal maneuvers -> Clavicular fracture -> Cephalic replacement.
The algorithm for shoulder dystocia mandates a strict progression to minimize maternal and fetal morbidity. It begins with immediate support and cessation of pushing, proceeds to the highly effective and low-risk McRoberts maneuver with suprapubic pressure, escalates to internal rotational maneuvers or posterior arm delivery if necessary, and only resorts to destructive maneuvers (clavicular fracture) or heroic surgical interventions (Zavanelli maneuver) when all standard vaginal maneuvers have failed.

Step-by-Step Solution

1
Recognize shoulder dystocia and immediately halt maternal pushing while calling for help.
Prevents worsening of the anterior shoulder impaction and mobilizes essential resuscitation personnel.
Maternal pushing forces the impacted anterior shoulder tighter against the pubic symphysis, increasing the risk of brachial plexus injury.
2
Execute the McRoberts maneuver concurrently with applied suprapubic pressure.
Alters the maternal pelvic geometry and redirects the fetal anterior shoulder into the oblique diameter.
These are the most successful, least invasive, and lowest-risk initial maneuvers.
3
Enter the vagina to perform internal rotational maneuvers (e.g., Woods corkscrew, Rubin II) or extract the posterior arm.
Reduces the bisacromial diameter of the fetus by utilizing the posterior pelvic space.
Required when external manipulation of the maternal pelvis fails to resolve the bony dystocia.
4
Apply direct pressure to fracture the fetal clavicle.
Dramatically reduces the transverse diameter of the fetal shoulders.
Indicated as a salvage procedure before attempting maternal operations of last resort.
5
Perform the Zavanelli maneuver (cephalic replacement) followed immediately by cesarean delivery.
Returns the fetus to the uterine cavity for abdominal delivery.
Used only as a last resort due to high maternal and fetal morbidity and mortality.

Key Concept

The stepwise escalation protocol for shoulder dystocia strictly advances from non-invasive maternal positioning (McRoberts) to internal fetal manipulation, and finally to destructive or heroic salvage maneuvers.
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Topics

Labor, Delivery, and Puerperium

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