Overview ED90 of 3% Chloroprocaine for Cervical Cerclage Status: Completed Trial end date: 2020-10-23 Target enrollment: Participant gender: Summary The aim of this study is to identify the dose of intrathecal (IT) chloroprocaine that provides effective anesthesia in 90% of patients undergoing elective cerclage placement (intraoperative analgesic supplementation not required). Phase: Phase 4 Details Lead Sponsor: Duke UniversityCollaborator: University of ArkansasTreatments: ChloroprocaineFentanylProcaine