EFM Fetal Oxygenation and Acid-Base Balance

Question 1

What is the normal pH range for umbilical artery blood at delivery?

Accepted Answer

7.25 – 7.35

Answer

7.10 – 7.20

Answer

7.05 – 7.15

Answer

7.40 – 7.50

Question 2

Which type of acidosis is characterized by an elevated PCO2 and normal base deficit in fetal cord blood?

Accepted Answer

Respiratory acidosis

Answer

Metabolic acidosis

Answer

Mixed acidosis

Answer

Lactic acidosis

Question 3

The primary mechanism by which oxygen crosses the placenta from mother to fetus is:

Accepted Answer

Simple diffusion

Answer

Active transport

Answer

Facilitated diffusion

Answer

Pinocytosis

Question 4

A base deficit greater than which value is considered significant for metabolic acidosis in the newborn?

Accepted Answer

12 mmol/L

Answer

4 mmol/L

Answer

8 mmol/L

Answer

16 mmol/L

Question 5

Which fetal blood vessel carries oxygenated blood FROM the placenta TO the fetus?

Accepted Answer

Umbilical vein

Answer

Umbilical artery

Answer

Ductus arteriosus

Answer

Ductus venosus

Question 6

Fetal hypoxia is defined as:

Accepted Answer

Inadequate oxygen delivery to fetal tissues

Answer

Insufficient glucose delivery to fetal tissues

Answer

Excessive CO2 accumulation in fetal blood

Answer

Decreased fetal cardiac output

Question 7

In fetal cord blood gas analysis, which value best reflects fetal metabolic status?

Accepted Answer

Base deficit

Answer

PCO2

Answer

PO2

Answer

pH alone