Background: The goal of this investigation was to evaluate the agreement of fetal pulse oximetry to saturation readings from hemoximetry at low oxygen saturation.
Methods: Fetal oxygen saturation measurements obtained by pulse oximetry were compared with those obtained by hemoximetry in fetal scalp blood samplings. The prospective observational trial included fetuses with non-reassuring fetal heart rate tracings suggestive of hypoxia and requiring fetal scalp blood samplings. Arterial oxygen saturation was determined by a blinded pulse oximeter (N400, FS14; Nellcor Puritan Bennett, Pleasanton, CA, USA) and continuously stored on a notebook computer. Saturation from fetal scalp blood samples was measured by hemoximetry (Bayer Diagnostics 865; ABL 625, Radiometer). Data analysis focussed on the absolute and relative difference between hemoximetry and pulse oximetry of fetuses, showing the most distinct difference in neonatal outcome. Normal outcome was defined as spontaneous delivery and umbilical artery pH >or= 7.20 + Apgar 5 >or= 7 (n = 42). In contrast, a group of neonates with combined respiratory and metabolic acidemia at birth was defined by pH
Results: The correlation coefficient between hemoximetry and pulse oximetry measurements was r = 0.72; p = 0.002 in the acidemic group. The median of absolute differences in saturation was + 5.2% (95%CI 2.5-10.3) saturation. The absolute differences ranged from -21% to + 36% saturation. The median of relative differences amounted to 23% (95%CI 15.1-55.0). The relative differences ranged from -30% to + 217%. Observing the saturation distribution in the two groups (hemoximetry and pulse oximetry, respectively) presented a median hemoximetry pulse oximetry of 38% (42%) in the normal and 26% (39%) in the acidemic group. In this small group of cases, the correlation coefficient between pH and saturation from pulse oximetry in fetal scalp blood from the samplings was r = 0.19.
Conclusion: Fetal pulse oximetry tends to overestimate arterial oxygen saturation compared with hemoximeter values.
Download full-text PDF |
Source |
---|---|
http://dx.doi.org/10.1034/j.1600-0412.2002.810508.x | DOI Listing |
J Family Med Prim Care
December 2024
Department of Neonatology, All India Institute of Medical Science, Jodhpur, Rajasthan, India.
Context: Heart rate (HR) is the most vital parameter to assess hemodynamic transition at birth. ECG is considered a gold standard for HR assessment. New devices with dry electrodes are easy to apply on a wet newborn.
View Article and Find Full Text PDFPediatr Pulmonol
January 2025
Department of Pulmonology, St. Antonius Hospital, Nieuwegein, the Netherlands.
Introduction: Hereditary hemorrhagic telangiectasia (HHT) is an autosomal dominant vascular disease and screening to detect pulmonary arteriovenous malformations (PAVMs) is important to prevent complications. In adults, transthoracic contrast echocardiogram (TTCE) is used to screen PAVMs. In children, a conservative screening method seems to be sufficient to rule out major PAVMs and prevent them from PAVM-related complications.
View Article and Find Full Text PDFPhysiol Rep
January 2025
Centre for Heart Lung Innovation, The University of British Columbia (UBC) and St. Paul's Hospital (SPH), Vancouver, British Columbia, Canada.
This study investigated sex differences in the development of pulmonary edema and exercise-induced arterial hypoxemia (EIAH) in well-trained endurance athletes during near-maximal exercise in a real-world setting. Twenty participants (10M vs. 10F; V̇Opeak: 69.
View Article and Find Full Text PDFJAMA
December 2024
Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland.
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!