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Updated: May 10, 2026
Assessment of Maternal Vascular Remodeling During Pregnancy in the Mouse Uterus
Published on: December 5, 2015
Microvascular remodelling in preeclampsia: quantifying capillary rarefaction accurately and independently predicts
Tarek F T Antonios1, Vivek Nama, Duolao Wang
1Blood Pressure Unit & Division of Clinical Sciences, St George's, University of London, London, UK.
Insights
Quantifying skin capillary rarefaction can help predict preeclampsia. This method, especially later in pregnancy, shows promise as a clinical tool for early detection of preeclampsia.
Area of Science:
- Obstetrics and Gynecology
- Cardiovascular Research
- Maternal-Fetal Medicine
Background:
- Preeclampsia is a leading cause of maternal and neonatal mortality.
- Rising incidence linked to hypertension, diabetes, and obesity.
- Microcirculatory abnormalities precede preeclampsia onset.
Purpose of the Study:
- To investigate capillary rarefaction as a predictor of preeclampsia.
- To assess the clinical utility of quantifying microcirculatory changes.
Main Methods:
- Measured skin capillary density in 322 pregnant women across 5 visits.
- Utilized a validated protocol for capillary density assessment.
- Analyzed data from 16 women who developed preeclampsia.
Main Results:
- Capillary rarefaction at 20-24 weeks: sensitivity 0.87, specificity 0.50 (AUC 0.70).
- Capillary rarefaction at 27-32 weeks: sensitivity 0.75, specificity 0.77 (AUC 0.82).
- Combined capillary rarefaction with uterine artery Doppler improved prediction; rarefaction at 27-32 weeks was the strongest independent predictor.
Conclusions:
- Quantifying structural capillary rarefaction is a potential clinical marker for preeclampsia prediction.
- Skin capillary density measurement offers a valuable tool in prenatal care.
- Further research can refine this marker for widespread clinical use.
Background:
Preeclampsia is a major cause of maternal and neonatal mortality and morbidity. The incidence of preeclampsia seems to be rising because of increased prevalence of predisposing disorders, such as essential hypertension, diabetes, and obesity, and there is increasing evidence to suggest widespread microcirculatory abnormalities before the onset of preeclampsia. We hypothesized that quantifying capillary rarefaction could be helpful in the clinical prediction of preeclampsia.
Methods:
We measured skin capillary density according to a well-validated protocol at 5 consecutive predetermined visits in 322 consecutive white women, of whom 16 subjects developed preeclampsia.
Results:
We found that structural capillary rarefaction at 20-24 weeks of gestation yielded a sensitivity of 0.87 with a specificity of 0.50 at the cutoff of 2 capillaries/field with the area under the curve of the receiver operating characteristic value of 0.70, whereas capillary rarefaction at 27-32 weeks of gestation yielded a sensitivity of 0.75 and a higher specificity of 0.77 at the cutoff of 8 capillaries/field with area under the curve of the receiver operating characteristic value of 0.82. Combining capillary rarefaction with uterine artery Doppler pulsatility index increased the sensitivity and specificity of the prediction. Multivariable analysis shows that the odds of preeclampsia are increased in women with previous history of preeclampsia or chronic hypertension and in those with increased uterine artery Doppler pulsatility index, but the most powerful and independent predictor of preeclampsia was capillary rarefaction at 27-32 weeks.
Conclusions:
Quantifying structural rarefaction of skin capillaries in pregnancy is a potentially useful clinical marker for the prediction of preeclampsia.
