The pulsating umbilical cord Frischkorn and Rucker (1939) described the appearance of the unclamped umbilical cord. Even in the 1930s cessation of pulsations was no longer waited for by all obstetricians:
vessels can be seen to pulsate strongly throughout their entire length. In a varying length of time the pulsations cease in the more distal part and as this occurs the umbilical vessels collapse. This process of cessation of pulsation and collapse of the vessels proceeds toward the umbilicus until finally there is no pulsation even at the navel. The vessels are then entirely collapsed. If now the cord be tied and cut very little blood will escape from the placental end." [3, p 593] 13. Frischkorn HB, Rucker MP. The relationship of the time of ligation of the cord to the red blood count of the infant. Am J Ostet Gynecol 1939; 38: 592-594. |
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