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THE EFFECT OF MATERNAL BEARING-DOWN EFFORTS ON ARTERIAL UMBILICAL CORD pH AND LENGTH OF THE SECOND STAGE OF LABOR

Authors

  • Lisa L. Paine cnm, drph,

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    • Lisa L. Paine, cnm, drph. Associate Professor at the Boston University School of Public Health, is director of the school's nurse-midwifery education program. At the time this study was conducted, she was on the faculty of the United States Air Force Nurse-Midwifery Program at Andrews Air Force Base, Maryland. Currently, Dr. Paine is the Chairperson of the Division of Research of the American College of Nurse-Midwives

  • Diane Dawkins Tinker cnm, mnsc

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    • Diane Dawkins Tinker, cnm, mnsc, obtained her certificate in nurse-midwifery from the United States Air Force Nurse-Midwifery Residency Program, Andrews Air Force Base, Maryland. At the time of this study, Ms. Tinker was a faculty member of the United States Air Force Nurse-Midwifery Program affiliated with Georgetown University Nurse-Midwifery Program, Washington, DC. Lt. Commander Tinker is a commissioned officer in the United States Public Health Service, Indian Health Service, and is a staff nurse-midwife at the Phoenix Indian Medical Center, Phoenix, Arizona. She is currently a member of the American College of Nurse-Midwives Division of Research


Department of Obstetrics and Gynecology, Phoenix Indian Medical Center, 4212 North 16th Street, Phoenix, AZ 85016

ABSTRACT

This study was conducted to compare two types of maternal bearing-down techniques as they relate to the fetal and maternal outcomes of arterial umbilical cord blood pH and length of the second stage of labor. A convenience sample was drawn from the laboring women at a 305. bed medical center who met specific inclusion criteria. Women self-selected to one of two bearing-down groups: spontaneous or Valsalva. Subjects were given specific instructions for the chosen method. The Valsalva group was comprised of 14 subjects, and the spontaneous group was comprised of 16 subjects. The groups were found to be comparable after analysis of several variables. Results of statistical analysis using t- test indicated that, in this small sample, there is no relationship between the second stage bearing-down method and arterial umbilical cord blood pH or length of the second stage of labor. These findings support the conclusions of several studies: using the spontaneous bearing-down method does not have a deletenous effect upon the mother or the fetus. Several recommendations are made for future research based on methodological issues raised during this study

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