Cyanotic Newborn

Question 1

What is the amount of reduced hemoglobin (saturation of arterial blood) perceived for a child to be cyanotic?

Answer 1

Reduced hemoglobin >5 g

saturation of arterial blood usually < 85%

Question 2

The most reliable method for assessment of cyanosis is..

Answer 2

measurement of blood oxygenation delivery (SpO2) by an

advance technology pulse oximeter

Question 3

What is the wavelength of lights emitted from the pulse oximeter (classic probe)

Answer 3

2 lights 650 and 805 nm

Question 4

Interpretation of Hyperoxia test used in neonatal cyanosis

Answer 4

Place infant on 100% oxygen hood for 10 minutes.

PaO2> 100 mmHg Parenchymal lung disease

PaO2= 50-100 mmHg —Parenchymal lung disease
—- Critical congenital cyanotic heart disease

PaO2< 50 mmHg— fixed R-L shunt cyanotic CHD
D-TGA, Tricuspid atresia, Pulmonary atresia
Persistent fetal circulation (difference Rt UL—LL: 20mmHg