A G2P1 patient with a history of a previous c-section is undergoing a trial of labor. She has been in labor for 16 hours and her last cervical exam was 7/100%/+1. The client becomes restless, anxious and reports severe shoulder pain despite having an epidural. The nurse notes cessation of uterine contractions on the monitor and reassesses dilation to note it as 8/100%/-4. The nurse alerts the provider of symptoms of which condition?