PMC4389168_01
Example for the determination of amniotic fluid volume using the single deepest pocket measurement (dotted line in A) and change of blood urea nitrogen (B) in a woman with known chronic kidney disease, presenting with twin pregnancy and imminent preterm labour, before and after starting haemodialysis treatment. (C) Twins after delivery at a gestational age of 28 weeks + 4 days.
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Repeated ultrasound evaluations confirmed intrauterine growth restriction in twin 1 by 24.7 % and twin 2 by 14.3%, respectively, and polyhydramnios as the cause of imminent preterm labour (Figure 1A). Because of the well-known association between polyhydramnios and elevated uraemic toxins, intrauterine growth restriction and threatening preterm labour of premature children, haemodialysis treatments were started to reduce uraemic toxins, including blood urea nitrogen (Figure 1B). Birth weights of the twins were 941 and 1164 g, respectively (Figure 1C).