Which sign indicates readiness to resolve a case of shoulder dystocia?

The successful visualization of the perineum indicates readiness to resolve a case of shoulder dystocia because it typically signifies that the fetal head has adequately descended and is at a safe position for delivery. When the perineum is visible, it often means that the delivery is progressing, and the shoulder dystocia may be addressed effectively. This visibility allows the healthcare provider to implement necessary maneuvers that may include the McRoberts maneuver or suprapubic pressure to free the impacted shoulder.

In situations of shoulder dystocia, clear fetal heart tones are essential for monitoring the condition of the fetus but are not indicative of the resolution readiness. Mom's comfort level is important for overall maternal satisfaction and care, yet it does not directly reflect the physical readiness for delivery in cases of shoulder dystocia. Complete dilation of the cervix is necessary for vaginal delivery, but it alone does not mean that the delivery can proceed safely in the face of shoulder dystocia without addressing the specific challenges that arise with the shoulders. Thus, the successful visualization of the perineum distinctly marks a point where immediate interventions may be appropriately initiated to resolve the situation.