RT Book, Section A1 Rédai, Imre A2 Atchabahian, Arthur A2 Gupta, Ruchir SR Print(0) ID 57263397 T1 Chapter 181. Physiology of Labor and the Postpartum Period T2 The Anesthesia Guide YR 2013 FD 2013 PB The McGraw-Hill Companies PP New York, NY SN 978-0-07-176049-2 LK accessanesthesiology.mhmedical.com/content.aspx?aid=57263397 RD 2024/03/29 AB Table Graphic Jump Location|Download (.pdf)|PrintRespiratory SystemMinute ventilation during labor75–150% increase in the first stageOxygen consumption may increase by 45%Epidural anesthesia prevents changes in the first stage150–300% increase in the second stageOxygen consumption may increase by 75%Paco2 may fall to 10–15 mm HgSerum lactate risesEpidural anesthesia does not prevent changes in minute ventilation, oxygen consumption and serum lactate in the second stagePostpartumFRC increases after birth but remains below normal for 1–2 weeksO2 consumption, minute ventilation, and tidal volume remain elevated till at least 6–8 weeks postpartum