How does the McRoberts maneuver work?

The McRoberts maneuver is an effective intervention during a shoulder dystocia situation, primarily used to facilitate the delivery of the infant by altering the angle of the pelvis. When the mother's legs are flexed tightly to her abdomen, it increases the curvature of the lumbar spine and opens the pelvic inlet. This position decreases the angle between the pelvis and the spine, which can help to reduce the obstruction caused by the baby’s shoulder being impacted behind the mother’s pubic bone.

By changing the pelvic angle, the McRoberts maneuver helps to create more room for the infant's shoulders to maneuver through the birth canal, allowing for a higher chance of successful delivery without additional interventions. Understanding this technique is crucial for healthcare providers managing shoulder dystocia, as it directly impacts the success rate of resolving the condition effectively and quickly.