DDx of cyanosis

Question 1

DDx of cyanosis

Answer 1

1. severe neuromuscular disease
2. primary pulmonary disease
3. abnormality of Hg-O2 binding
4. abnormal cardiac physiology

Question 2

1. severe neuromuscular disease cause

Answer 2

respiratory hypoventilation

reduced minute ventilation

Question 3

1. severe neuromuscular disease clinical manifestation

Answer 3

very shallow breathing
hypoxia
hypercarbia

Question 4

primary pulmonary disease causes

Answer 4

alveolar hypoventilation
V-P mismatch
intrapulmonary shunting

Question 5

primary pulmonary clinical manifestations

Answer 5

tachypnea
hypoxia
hypercarbia

Question 6

abnormality of Hg-O2 binding causes

Answer 6

decreased oxygen carrying capacity of blood

Question 7

abnormality of Hg-O2 binding clinical manif.

Answer 7

little or no distress

chocolate colored blood

Question 8

abnormal cardiac physiology causes

Answer 8

TGA
t of f
truncus
tricuspid atresia
TAPVR
pulmonary atresia
single ventricle (hypoplastic right to left)

Question 9

abnormal cardiac physiology clinical manif.

Answer 9

hypoxia without hypercarbia

maybe tachypnea

Question 10

normal infant room air pO2

Answer 10

60-85
100% O2: >200
Co2: 35-40

Question 11

normal infant pCo2 levels

Answer 11

35-40

Question 12

neuromuscular disease infant room air pO2

Answer 12

45-50
100% O2: >100
Co2: >50

Question 13

pulmonary disease infant room air O2

Answer 13

pO2 50

100% O2: >100
CO2: >50

Question 14

cardiac defect

Answer 14

room air: O2 <50

CO2: 35-40