RT Book, Section A1 McDonald, John S. A1 Chen, Biing-Jaw A1 Kwan, Wing-Fai A2 DeCherney, Alan H. A2 Nathan, Lauren A2 Laufer, Neri A2 Roman, Ashley S. SR Print(0) ID 1159955557 T1 Obstetric Analgesia & Anesthesia T2 CURRENT Diagnosis & Treatment: Obstetrics & Gynecology, 12e YR 2019 FD 2019 PB McGraw-Hill Education PP New York, NY SN 9780071833905 LK accessmedicine.mhmedical.com/content.aspx?aid=1159955557 RD 2024/04/19 AB Analgesia is the loss or modulation of pain perception. It can be (1) local and affect only a small area of the body, (2) regional and affect a larger portion of the body, or (3) systemic. Analgesia is achieved by the use of hypnosis (suggestion), systemic medication, regional agents, or inhalational agents.