Shoulder dystocia

What is shoulder dystocia?

Shoulder dystocia is a delivery complication where the baby's head has emerged but a shoulder becomes lodged behind the mother's pubic bone, preventing the rest of the body from delivering normally.

It is an obstetric emergency, since the baby cannot breathe independently while partially delivered, and the interval that follows is measured in minutes.

It cannot always be predicted, though certain risk factors including large fetal size and maternal diabetes increase the likelihood, which is why prenatal assessment matters.

How the team responds in the following minutes is usually the central question in any resulting claim, rather than whether the complication occurred at all.

What maneuvers are used to resolve it?

Trained obstetric teams have several recognized techniques to free the impacted shoulder.

• Repositioning the mother's legs to widen the pelvic outlet
• Applying suprapubic pressure from an assistant
• Internal rotation maneuvers to reposition the shoulder
• Delivering the posterior arm first
• In rare cases, more invasive measures reserved for the most severe presentations

What can go wrong in the response?

Excessive traction on the head while the shoulder remains lodged is the most common source of injury, since it stretches the nerves running from the neck into the arm.

This is the mechanism behind many brachial plexus injuries and specifically Erb's palsy, which is why delivery technique is examined so closely.

Delay in recognizing the complication and beginning recognized maneuvers can also extend the period of oxygen compromise, risking broader injury beyond the arm itself.

How is a claim evaluated?

Through close review of the delivery record, which should document the maneuvers attempted, their sequence and the time elapsed from recognition to delivery.

An obstetric expert assesses whether the response followed recognized technique or whether excessive traction was applied instead of the maneuvers appropriate to the situation.

Prenatal records showing whether risk factors were identified and how the delivery was planned in light of them also factor into the analysis.

Nursing documentation often supplements the physician's account, since staff present may have recorded details the delivery note omits.

Common questions

Is shoulder dystocia always predictable?

No. Certain risk factors increase the likelihood, but the complication can occur without warning even in low risk pregnancies.

Does shoulder dystocia always cause injury?

No. Many cases resolve with recognized maneuvers and no lasting harm. The question in a claim is whether the specific response met the standard of care.

What records should be reviewed?

The complete delivery record documenting maneuvers and timing, prenatal records addressing risk factors, and the newborn's early examination findings.