Abstract
Blood volume and its components (125-I-albumin, 51-Cr-RBCs) were measured in 195 vaginally delivered piglets immediately after cord severage. Spontaneous cord-rupture studied in 118 normal piglets took place during delivery or within 190 s of birth. The increment in red cell mass (RCM) during this time (Table) reflects a placental transfusion of 60% of fetal blood volume.
RCM was significantly increased in the “runts” and in the piglets with metabolic acidosis (base excess below -10 mmol/l)compared to the normal piglets. This may be explained by increased erythropoiesis and prenatal placental transfusion, respectively. The piglets with acute intra-partum asphyxia which cords were severed 0 s after birth were deprived of placental transfusion, possibly as a result of vasoconstriction. The low RCM in the premature piglets with prostaglandin-induced deliveries indicates fetal loss of blood to the placenta.
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Linderkamp, O., Betke, K. & Riegel, K. 17 PLACENTAL TRANSFUSION IN NATURALLY BORN PIGLETS. Pediatr Res 13, 951 (1979). https://doi.org/10.1203/00006450-197908000-00033
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DOI: https://doi.org/10.1203/00006450-197908000-00033
