cyanosis_neonatal_flashcards (1)
What is peripheral cyanosis in newborns and when is it common?
Peripheral cyanosis, such as of the feet and hands, is very common in the first 24 hours of life and may occur when the child is crying or unwell from any cause.
How is central cyanosis clinically recognized?
When the concentration of reduced haemoglobin in the blood exceeds 5g/dl.
What is the nitrogen washout test used for in neonates?
To differentiate cardiac from non-cardiac causes of cyanosis.
What indicates cyanotic congenital heart disease in the nitrogen washout test?
A pO2 of less than 15 kPa after giving 100% oxygen for ten minutes.
What are the causes of cyanotic congenital heart disease?
Tetralogy of Fallot (TOF), transposition of the great arteries (TGA), tricuspid atresia.
What is the initial management for suspected cyanotic congenital heart disease?
Supportive care and prostaglandin E1 (e.g. alprostadil) to maintain a patent ductus arteriosus.
What is the role of prostaglandin E1 in managing cyanotic congenital heart disease?
It maintains a patent ductus arteriosus in ductal-dependent congenital heart defects until a definite diagnosis is made and surgical correction performed.
What is acrocyanosis in newborns?
Cyanosis around the mouth and extremities such as the hands and feet, often seen in healthy newborns.
How is acrocyanosis differentiated from other causes of peripheral cyanosis?
It occurs immediately after birth in healthy infants and is a common finding, persisting for 24 to 48 hours.
How long may acrocyanosis persist in healthy newborns?
For 24 to 48 hours.
