Evaluation of erythrocyte hyperaggregation in fetal blood drawn by cordocentesis as a marker of fetal diseases

Article type: Research Article

Authors: Brun, J.F. | El Bouhmadi, A. | Boulot, P. | Rousseau, O. | Laffargue, F. | Viala, J.L. | Orsetti, A.

Affiliations: Service d'Exploration Physiologique des Hormones et des Métabolismes et Service de Gynécologie Obstétrique, Complexe Hospitalier Lapeyronie et Arnaud de Villeneuve 34059 Montpellier-cédex, France

Abstract: Fetal blood can now be routinely studied by intrauterine sampling. Low erythrocyte aggregability is one of its most prominent hemorheological characteristics before 32 wk gestation. We investigated whether increased RBC aggregability is a marker of fetal pathologies. After we established in 119 fetuses a control group for fetal blood rheology, we measured erythrocyte aggregation with the Myrenne apparatus (i.e. a micromethod using 1 droplet of blood) in 111 fetuses explored for various diseases. RBC aggregation was increased (>2 Sd for gestational age) in 24 fetal blood samples, with the following diseases: 12.5% toxoplasmosis; 12.5% rhesus immunization; 8.33% autoimmune thrombocytopenia; 8.33% kidney polycystosis; 8.33% old maternal age; 8.33% heart malformation; 8.33% fetal hypotrophia. In autoimmune diseases (rhesus; thrombocytopenia) RBC aggregation was increased in 5/10 cases (50%); in heart or kidney malformations 5/10 (50%); in toxoplasmosis seroconversion 3/23 i.e. 13% of the fetuses had increased aggregation. These data suggest that RBC aggregation is increased in several fetal diseases and may be a nonspecific marker of them.

Keywords: fetal blood, cordocentesis, hemorheology, erythrocyte deformability, blood viscosity, erythrocyte aggregation

DOI: 10.3233/CH-1994-14501

Journal: Clinical Hemorheology and Microcirculation, vol. 14, no. 5, pp. 637-642, 1994