Association Between Fluid Administration, Oxytocin Administration, and Fetal Heart Rate Changes

Summary

Fetal heart rate patterns are an important parameter in the diagnosis of non-reassuring fetal status. Combined-spinal epidural analgesia is a method of initiating labor analgesia used by approximately 90% of the parturients at Prentice Women's Hospital. Optimizing the variables which could affect fetal heart rate patterns at the time of initiation of analgesia, such as fluid administration and oxytocin management, could help us provide better care for our patients and their fetuses. Hypotheses: Patients who receive a 1000 mL fluid bolus and lower rates of oxytocin administration will have fewer non-reassuring fetal heart rate (FHR) changes.

Timeline

Start

2014-04

Primary completion

2021-09-21

Completion

2021-09-21

Publications

• Background Mardirosoff C, Dumont L, Boulvain M, Tramer MR. Fetal bradycardia due to intrathecal opioids for labour analgesia: a systematic review. BJOG. 2002 Mar;109(3):274-81. doi: 10.1111/j.1471-0528.2002.01380.x.
• Background Abrao KC, Francisco RPV, Miyadahira S, Cicarelli DD, Zugaib M. Elevation of uterine basal tone and fetal heart rate abnormalities after labor analgesia: a randomized controlled trial. Obstet Gynecol. 2009 Jan;113(1):41-47. doi: 10.1097/AOG.0b013e31818f5eb6.
• Background Clarke VT, Smiley RM, Finster M. Uterine hyperactivity after intrathecal injection of fentanyl for analgesia during labor: a cause of fetal bradycardia? Anesthesiology. 1994 Oct;81(4):1083. doi: 10.1097/00000542-199410000-00041. No abstract available.
• Background Lopez-Zeno JA, Peaceman AM, Adashek JA, Socol ML. A controlled trial of a program for the active management of labor. N Engl J Med. 1992 Feb 13;326(7):450-4. doi: 10.1056/NEJM199202133260705.
• Background Lindmark G, Nilsson BA. A comparative study of uterine activity in labour induced with prostaglandin F2alpha or oxytocin and in spontaneous labour. I. Pattern of the uterine contractions. Acta Obstet Gynecol Scand. 1976;55(5):453-60. doi: 10.3109/00016347609158529.
• Background Satin AJ, Leveno KJ, Sherman ML, Brewster DS, Cunningham FG. High- versus low-dose oxytocin for labor stimulation. Obstet Gynecol. 1992 Jul;80(1):111-6.
• Background Hourvitz A, Alcalay M, Korach J, Lusky A, Barkai G, Seidman DS. A prospective study of high- versus low-dose oxytocin for induction of labor. Acta Obstet Gynecol Scand. 1996 Aug;75(7):636-41. doi: 10.3109/00016349609054688.
• Background Merrill DC, Zlatnik FJ. Randomized, double-masked comparison of oxytocin dosage in induction and augmentation of labor. Obstet Gynecol. 1999 Sep;94(3):455-63. doi: 10.1016/s0029-7844(99)00338-5.
• Background Sadler LC, Davison T, McCowan LM. A randomised controlled trial and meta-analysis of active management of labour. BJOG. 2000 Jul;107(7):909-15. doi: 10.1111/j.1471-0528.2000.tb11091.x.
• Background Kinsella SM, Pirlet M, Mills MS, Tuckey JP, Thomas TA. Randomized study of intravenous fluid preload before epidural analgesia during labour. Br J Anaesth. 2000 Aug;85(2):311-3. doi: 10.1093/bja/85.2.311.
• Background Cheek TG, Samuels P, Miller F, Tobin M, Gutsche BB. Normal saline i.v. fluid load decreases uterine activity in active labour. Br J Anaesth. 1996 Nov;77(5):632-5. doi: 10.1093/bja/77.5.632.
• Background ACOG Practice Bulletin No. 106: Intrapartum fetal heart rate monitoring: nomenclature, interpretation, and general management principles. Obstet Gynecol. 2009 Jul;114(1):192-202. doi: 10.1097/AOG.0b013e3181aef106. No abstract available.

Drugs

Indications