Effect of meconium on the hemoglobin-oxygen association curve

S. S. Stadler, C. J. Macri, J. N. Kopelman, A. Mitchell, P. K. Chakraborty, Andrew Satin

Research output: Contribution to journalArticle

Abstract

Objective: Our purpose was to determine the effect of meconium-stained amniotic fluid on the hemoglobin-oxygen association curve of maternal whole blood. Methods: Whole blood was obtained from term gravidas in active labor. Hemoglobin-oxygen association curves were generated for blood incubated with meconium vs. controls. Oxygen association curves were determined at pH 7.4 and 37°C utilizing an automated device consisting of a spectrophotometer cuvette fitted with a magnetic stirrer, gas exchange line, and a Clark oxygen electrode. The samples were deoxygenated with nitrogen and association curves recorded while reoxygenating. Data was analyzed with Sigma Plot and Sigma Stat software. Analysis included log transformation, linear regression, and paired t-test. Results: Twenty-eight hemoglobin oxygen association curves were generated. In all 14 pairs, meconium shifted the hemoglobin-oxygen association curve to the right. Partial pressures of oxygen required for various degrees of hemoglobin saturation were higher in meconium-exposed samples; P50 (30.1 ± 0.6 vs. 27.8 ± 0.4 mmHg, P <0.01); P75 (46.9 ± 0.6 vs. 43.1 ± 0.5 mmHg, P <.001); P90 (69.2 ± 1 vs. 63.3 ± 1 mmHg, P <0.01). Conclusions: Meconium-stained amniotic fluid causes a statistically significant, but clinically small, right shift in the hemoglobin-oxygen association curve.

Original languageEnglish (US)
Pages (from-to)253-255
Number of pages3
JournalJournal of Maternal-Fetal Medicine
Volume8
Issue number6
DOIs
StatePublished - 1999
Externally publishedYes

Fingerprint

Meconium
Hemoglobins
Oxygen
Amniotic Fluid
Partial Pressure
Linear Models
Electrodes
Nitrogen
Software
Gases
Mothers
Equipment and Supplies

Keywords

  • Hemoglobin
  • Meconium
  • Oxygen

ASJC Scopus subject areas

  • Obstetrics and Gynecology
  • Pediatrics, Perinatology, and Child Health

Cite this

Effect of meconium on the hemoglobin-oxygen association curve. / Stadler, S. S.; Macri, C. J.; Kopelman, J. N.; Mitchell, A.; Chakraborty, P. K.; Satin, Andrew.

In: Journal of Maternal-Fetal Medicine, Vol. 8, No. 6, 1999, p. 253-255.

Research output: Contribution to journalArticle

Stadler, S. S. ; Macri, C. J. ; Kopelman, J. N. ; Mitchell, A. ; Chakraborty, P. K. ; Satin, Andrew. / Effect of meconium on the hemoglobin-oxygen association curve. In: Journal of Maternal-Fetal Medicine. 1999 ; Vol. 8, No. 6. pp. 253-255.
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