Nasal catheter<unk>  can be suspected if it is impossible to insert a nasal catheter. The length of catheter that can be inserted indicates where<unk>  has occurred: shorter distances indicate a problem with the vomer, while longer distances indicate a problem with the posterior<unk> . Mucus can be cleared (using suction) to visualise the abnormality. Radiology Diagnosis is confirmed using CT scan. This is also useful for differential diagnosis.
Choanal atresia
Hypospadias
Duodenal atresia
Intestinal atresia
Gastric atresia
Cloacal exstrophy
Gastroschisis
Diaschisis