Nonobstetric Surgery during Pregnancy: An Overview for Anesthesia Providers

A pregnant patient’s surgery can be challenging for the anesthesia provider—the needs of the parturient and fetus must be addressed while balancing the physiologic and pharmacologic changes that occur during pregnancy. Improved outcomes have led to an increase in the frequency of surgeries in parturients, with approximately 50,000 procedures performed annually in the US. Due to a lack of randomized controlled studies, determining the optimal anesthetic technique for nonobstetric surgery during pregnancy is predicated on understanding the physiologic changes of pregnancy. The anesthesia provider must become familiar with specific changes and challenges in each parturient to formulate a safe anesthetic plan. Here, we review physiologic and pharmacologic conditions observed in common surgical cases that may occur during pregnancy. Our goal is to inform safe clinical practices determined by the latest scientific methods for nonobstetric surgery during pregnancy.    This review contains 5 figures, 3 tables and 45 references. Key Words: anesthesia, nonobstetric surgery, obstetric anesthesia, pregnancy, surgery, physiology, pharmacology, gynecology