Stefano Raffaele Giannubilo1,2, Mirco Amici3, Simone Pizzi3, Alessandro Simonini3, Andrea Ciavattini4. 1. Department of Obstetrics and Gynecology, Marche Polytechnic University, Ancona, Italy. s.giannubilo@univpm.it. 2. Department of Clinical Sciences, Polytechnic University of Marche Salesi Hospital, via Corridoni 11, 60123, Ancona, Italy. s.giannubilo@univpm.it. 3. Department of Anaesthesia and Intensive Care, Salesi Hospital, Ancona, Italy. 4. Department of Clinical Sciences, Polytechnic University of Marche Salesi Hospital, via Corridoni 11, 60123, Ancona, Italy.
Abstract
PURPOSE: To analyze the mechanisms involved in the fetal heart rate (FHR) abnormalities after the epidural analgesia in labor. METHODS: A prospective unblinded single-center observational study on 55 term singleton pregnant women with spontaneous labor. All women recruited underwent serial bedside measurements of the main hemodynamic parameters using a non-invasive ultrasound system (USCOM-1A). Total vascular resistances (TVR), heart rate (HR), stroke volume (SV), cardiac output (CO) and arterial blood pressure were measured before epidural administration (T0), after 5 min 5 (T1) from epidural bolus and at the end of the first stage of labor (T2). FHR was continuously recorded through computerized cardiotocography before and after the procedure. RESULTS: The starting CO was significantly higher in a subgroup of women with low TVR than in women with high-TVR group. After the bolus of epidural analgesia in the low-TVR group there was a significant reduction in CO and then increased again at the end of the first stage, in the high-TVR group the CO increased insignificantly after the anesthesia bolus, while it increased significantly in the remaining part of the first stage of labor. On the other hand, CO was inversely correlated with the number of decelerations detected on cCTG in the 1 hour after the epidural bolus while the short-term variation was significantly lower in the group with high-TVR. CONCLUSION: Maternal hemodynamic status at the onset of labor can make a difference in fetal response to the administration of epidural analgesia.
PURPOSE: To analyze the mechanisms involved in the fetal heart rate (FHR) abnormalities after the epidural analgesia in labor. METHODS: A prospective unblinded single-center observational study on 55 term singleton pregnant women with spontaneous labor. All women recruited underwent serial bedside measurements of the main hemodynamic parameters using a non-invasive ultrasound system (USCOM-1A). Total vascular resistances (TVR), heart rate (HR), stroke volume (SV), cardiac output (CO) and arterial blood pressure were measured before epidural administration (T0), after 5 min 5 (T1) from epidural bolus and at the end of the first stage of labor (T2). FHR was continuously recorded through computerized cardiotocography before and after the procedure. RESULTS: The starting CO was significantly higher in a subgroup of women with low TVR than in women with high-TVR group. After the bolus of epidural analgesia in the low-TVR group there was a significant reduction in CO and then increased again at the end of the first stage, in the high-TVR group the CO increased insignificantly after the anesthesia bolus, while it increased significantly in the remaining part of the first stage of labor. On the other hand, CO was inversely correlated with the number of decelerations detected on cCTG in the 1 hour after the epidural bolus while the short-term variation was significantly lower in the group with high-TVR. CONCLUSION: Maternal hemodynamic status at the onset of labor can make a difference in fetal response to the administration of epidural analgesia.
Authors: H Valensise; D Farsetti; D Lo Presti; I Pisani; G M Tiralongo; G Gagliardi; B Vasapollo; G P Novelli Journal: Ultrasound Obstet Gynecol Date: 2016-09-09 Impact factor: 7.299
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