Cord Blood Umbilical Cord 4

Question 1

What is umbilical cord prolapse?

Accepted Answer

The cord descending through the cervix ahead of the presenting fetal part

Answer

Cord prolapse occurs when the umbilical cord slips through the cervix before or alongside the fetus, risking compression and fetal hypoxia.

Question 2

In cord blood banking, what is the minimum recommended total nucleated cell (TNC) count for a unit to be considered therapeutically useful?

Accepted Answer

500 million cells

Answer

Most cord blood banks require at least 500 million total nucleated cells for a unit to be stored and considered clinically viable.

Question 3

Which maternal factor most commonly leads to a longer-than-average umbilical cord?

Accepted Answer

Increased fetal movement in utero

Answer

Greater fetal movement in utero is associated with cord elongation as traction stimulates cord growth.

Question 4

What is the ductus venosus and how does it relate to the umbilical vein?

Accepted Answer

A fetal shunt that directs oxygenated blood from the umbilical vein directly to the inferior vena cava

Answer

The ductus venosus shunts about 50% of oxygenated blood from the umbilical vein past the liver directly into the inferior vena cava.

Question 5

Which condition describes a cord insertion at the very edge of the placenta?

Accepted Answer

Marginal (battledore) insertion

Answer

Marginal or battledore insertion occurs when the cord attaches at the placental edge, which usually carries minimal clinical risk.

Cord Blood Practice Test