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  • Title: The effect of placental isolation on umbilical artery blood gas measurements.
    Author: Leung WI, Lyndon CA.
    Journal: Am J Obstet Gynecol; 2007 May; 196(5):e52-4. PubMed ID: 17466680.
    Abstract:
    OBJECTIVE: We conducted a study to determine whether the pH and base excess of umbilical artery blood samples are significantly different when taken from a double-clamped segment of umbilical cord as compared with a nonisolated segment of umbilical cord. STUDY DESIGN: A prospective study with 43 singleton pregnancies was conducted. Matched pair samples of umbilical arterial blood were compared from double-clamped and nonisolated segments. The means for pH and base excess were compared and a paired t test was used to determine significance. RESULT: The means for pH and base excess were not significantly different (P = .70) between the 2 groups. CONCLUSION: Double clamping the umbilical cord before obtaining an umbilical artery sample is not necessary for accurate blood gas results.
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