Table 4.

Monitoring infants with BPD after discharge.

Parameter		Reference
Body weight, length, and head circumference	Intergrowth-21st standards: monitoring up to 64 weeks postmenstrual age, for infants born at >26 and <37 weeks of gestation	[150]
Monitoring iron status	Complete blood count with reticulocyte count, and serum ferritin levels	[140]
Monitoring protein nutrition	Blood urea nitrogen (BUN)	[113]
Monitoring metabolic bone disease	Serum phosphorus and alkaline phosphate levels	[149]
Monitoring electrolyte balance (if diuretic use)	Serum electrolytes	[27]
Monitoring vitamins and trace elements (if deficiency suspicion)	Serum levels of vitamin A, 25-hydroxy vitamin D, zinc, and selenium	[27]