To best serve the needs of practicing perianesthesia nurses, content from Core Curriculum for PeriAnesthesia Nursing, 4th Edition and Ambulatory Surgical Nursing Core Curriculum were combined into one new core, PeriAnesthesia Nursing Core Curriculum. This new core adds additional key content to provide the most comprehensive reference for perianesthesia practice, from preanesthesia through postanesthesia Phase 3. This one resource provides practicing perianesthesia nurses with the complete scope of practice in line with and as defined by ASPAN.