ABSTRACT
We compared outcomes for neonates with forceps-assisted, vacuum-assisted, or cesarean delivery in the second stage of labor. This is a secondary analysis of a randomized trial in laboring, low-risk, nulliparous women at ≥36 weeks' gestation. Neonatal outcomes after use of forceps, vacuum, and cesarean were compared among women in the second stage of labor at station +1 or below (thirds scale) for failure of descent or nonreassuring fetal status. Nine hundred ninety women were included in this analysis: 549 (55%) with an indication for delivery of failure of descent and 441 (45%) for a nonreassuring fetal status. Umbilical cord gases were available for 87% of neonates. We found no differences in the base excess (p = 0.35 and 0.78 for failure of descent and nonreassuring fetal status) or frequencies of pH below 7.0 (p = 0.73 and 0.34 for failure of descent and nonreassuring fetal status) among the three delivery methods. Birth outcomes and umbilical cord blood gas values were similar for those neonates with a forceps-assisted, vacuum-assisted, or cesarean delivery in the second stage of labor. The occurrence of significant fetal acidemia was not different among the three delivery methods regardless of the indication.
KEYWORDS
Cesarean - forceps - umbilical cord blood gases - vacuum
REFERENCES
1
Menacker F.
National Center for Health Statistics .
Trends in cesarean rates for first births and repeat cesarean rates for low-risk women: United States, 1990–2003.
Natl Vital Stat Rep.
2005;
54
1-8
2 Martin J A, Hamilton B E, Sutton P D National Center for Health Statistics et al. Births: Final data for 2005. Vol. 56, No. 6. Hyattsville, MD; National vital statistics reports 2007
3
Hannah M E, Hannah W J, Hewson S A, Hodnett E D, Saigal S, Willan A R. Term Breech Trial Collaborative Group .
Planned caesarean section versus planned vaginal birth for breech presentation at term: a randomised multicentre trial.
Lancet.
2000;
356
1375-1383
4 Centers for Disease Control and Prevention .National Center for Health Statistics. VitalStats. Available at: http://www.cdc.gov/nchs/vitalstats.htm Accessed April 14, 2009
5
O'Leary C M, de Klerk N, Keogh J et al..
Trends in mode of delivery during 1984-2003: can they be explained by pregnancy and delivery complications?.
BJOG.
2007;
114
855-864
6 Haupt B J. National Center for Health Statistics .Deliveries in short-stay hospitals. Advance Data from Vital and Health Statistics, No. 83, DHHS Pub. No. (PHS) 82–1250. Hyattsville, MD; Public Health Service October 8, 1982
7 Martin J A, Hamilton B E, Sutton P D et al.. Births: Final data for 2004. National vital statistics reports; Vol. 55, No. 1. Hyattsville, MD; National Center for Health Statistics 2006
8
Cheong Y C, Abdullahi H, Lashen H, Fairlie F M.
Can formal education and training improve the outcome of instrumental delivery?.
Eur J Obstet Gynecol Reprod Biol.
2004;
113
139-144
9
Learman L A.
Regional differences in operative obstetrics: a look to the South.
Obstet Gynecol.
1998;
92(4 Pt 1)
514-519
10
Towner D R, Ciotti M C.
Operative vaginal delivery: a cause of birth injury or is it?.
Clin Obstet Gynecol.
2007;
50
563-581
11
Murphy D J, Pope C, Frost J, Liebling R E.
Women's views on the impact of operative delivery in the second stage of labour: qualitative interview study.
BMJ.
2003;
327
1132
12
Wen S W, Liu S, Kramer M S et al..
Comparison of maternal and infant outcomes between vacuum extraction and forceps deliveries.
Am J Epidemiol.
2001;
153
103-107
13
Demissie K, Rhoads G G, Smulian J C et al..
Operative vaginal delivery and neonatal and infant adverse outcomes: population based retrospective analysis.
BMJ.
2004;
329
24-29
14
Towner D, Castro M A, Eby-Wilkens E, Gilbert W M.
Effect of mode of delivery in nulliparous women on neonatal intracranial injury.
N Engl J Med.
1999;
341
1709-1714
15
Milsom I, Ladfors L, Thiringer K, Niklasson A, Odeback A, Thornberg E.
Influence of maternal, obstetric and fetal risk factors on the prevalence of birth asphyxia at term in a Swedish urban population.
Acta Obstet Gynecol Scand.
2002;
81
909-917
16 American College of Obstetricians and Gynecologists .Clinical management guidelines for obstetrician gynecologists: Operative vaginal delivery. Washington, DC; Practice Bulletin No. 17 June 2000
17
Bloom S L, Spong C Y, Thom E National Institute of Child Health and Human Development Maternal-Fetal Medicine Units Network et al.
Fetal pulse oximetry and cesarean delivery.
N Engl J Med.
2006;
355
2195-2202
18
Goldaber K G, Gilstrap III L C, Leveno K J, Dax J S, McIntire D D.
Pathologic fetal acidemia.
Obstet Gynecol.
1991;
78
1103-1107
19
Helwig J T, Parer J T, Kilpatrick S J, Laros Jr R K.
Umbilical cord blood acid-base state: what is normal?.
Am J Obstet Gynecol.
1996;
174
1807-1812
discussion 1812-1814
20 American College of Obstetricians and Gynecologists and American Academy of Pediatrics .Neonatal encephalopathy and cerebral palsy: defining the pathogenesis and pathophysiology. Washington, DC; American College of Obstetricians and Gynecologists 2003
21
Nelson K B, Chang T.
Is cerebral palsy preventable?.
Curr Opin Neurol.
2008;
21
129-135
22
Gilstrap III L C, Leveno K J, Burris J, Williams M L, Little B B.
Diagnosis of birth asphyxia on the basis of fetal pH, Apgar score, and newborn cerebral dysfunction.
Am J Obstet Gynecol.
1989;
161
825-830
23
Alexander J M, Leveno K J, Rouse D J National Institute of Child Health and Human Development (NICHD) Maternal-Fetal Medicine Units Network (MFMU) et al.
Comparison of maternal and infant outcomes from primary cesarean delivery during the second compared with first stage of labor.
Obstet Gynecol.
2007;
109
917-921
24
Johnson J H, Figueroa R, Garry D, Elimian A, Maulik D.
Immediate maternal and neonatal effects of forceps and vacuum-assisted deliveries.
Obstet Gynecol.
2004;
103
513-518
25
Graham E M, Ruis K A, Hartman A L, Northington F J, Fox H E.
A systematic review of the role of intrapartum hypoxia-ischemia in the causation of neonatal encephalopathy.
Am J Obstet Gynecol.
2008;
199
587-595
26
Larma J D, Silva A M, Holcroft C J et al..
Intrapartum electronic fetal heart rate monitoring and the identification of metabolic acidosis and hypoxic–ischemic encephalopathy.
Am J Obstet Gynecol.
2007;
197
301.e1-301.e8
27
Menticoglou S M, Manning F, Harman C, Morrison I.
Perinatal outcome in relation to second-stage duration.
Am J Obstet Gynecol.
1995;
173(3 Pt 1)
906-912
Stephen A ContagM.D.
Institute for Maternal Fetal Medicine, Department of Obstetrics and Gynecology
Sinai Hospital, 2401 West Belvedere Ave, Baltimore, MD 21215; reprints are not available from the author
Email: scontag@lifebridgehealth.org