Cyanosis
Related to absolute number of deoxyhaemaglobin
i.e. in anaemia won't be cyanotic until much lower sats
in polycythemia will become cyanotic with modest sats drop
Neurological
Ix
Pre and post ductal sats (difference of >5% = R>L shunt i.e. R arm (oxygenated) high, foot/Umb (mixed) lower
i.e. in anaemia won't be cyanotic until much lower sats
in polycythemia will become cyanotic with modest sats drop
Neurological
- Central apnoea
- Apnoea of prematurity (unrelated to feeds)
- Seizures (unrelated to feeds)
- Laryngeal cleft (during feed, cough)
- TOF (during feed, cough)
- Reflux (post feeds)
- Alveolar capillary dysplasia (with PPHTN) (usually die soon after birth)
- Persistent Pulmonary Hypertension of the Newborn (unresponsive to hyperoxia as well!)
- Cyanotic Congenital Heart Disease (unresponsive to hyperoxia)
Ix
Pre and post ductal sats (difference of >5% = R>L shunt i.e. R arm (oxygenated) high, foot/Umb (mixed) lower