What are the causes of hypoglycemia in premature infants?

Generally, hypoglycemia in preterm infants may be caused by insufficient glycogen reserves, excessive energy consumption, delayed feeding, infections, or congenital metabolic disorders. If any abnormalities occur, timely medical consultation is recommended. Detailed analysis is as follows:

1. Insufficient Glycogen Reserves

Preterm infants have small gestational ages and immature organ development, including the liver, resulting in limited glycogen synthesis and storage capacity. After birth, they are prone to hypoglycemia due to rapid glycogen consumption. Early feeding after birth is recommended, starting with small and frequent feedings of breast milk or preterm infant formula. When oral feeding is not possible, glucose should be administered intravenously under medical guidance.

2. Excessive Energy Consumption

Preterm infants have poor temperature regulation abilities, requiring more energy to maintain body temperature, and they also have higher basal metabolic rates, which can easily lead to decreased blood glucose levels. Maintaining an appropriate environmental temperature and using incubators or保温 measures to stabilize the infant's body temperature is important. Minimizing unnecessary stimuli can help reduce energy expenditure.

3. Delayed Feeding

Preterm infants often have weak sucking and swallowing abilities. If feeding is delayed or the milk volume is insufficient, glucose cannot be replenished in time, leading to hypoglycemia, which may be accompanied by drowsiness. Feeding should be conducted patiently, starting with minimal feeding and gradually increasing the milk volume. If feeding difficulties persist, enteral feeding via a nasogastric tube should be used under medical supervision to ensure adequate nutrition intake.

4. Infections

Due to their weakened immune systems, preterm infants may experience stress responses after bacterial or viral infections, leading to increased energy consumption and metabolic disturbances that can cause hypoglycemia, often accompanied by fever and poor responsiveness. Anti-infective medications such as sodium penicillin for injection, cefotaxime sodium for injection, and ampicillin sodium for injection should be used under medical guidance.

5. Congenital Metabolic Disorders

Some preterm infants may have congenital metabolic disorders, such as enzyme deficiencies related to glucose metabolism, which can affect glucose synthesis and utilization, leading to persistent hypoglycemia. Timely metabolic testing is necessary for diagnosis, and metabolic disturbances should be corrected using glucose injection, 10% potassium chloride injection, sodium bicarbonate injection, and other treatments under medical supervision.

In daily care, closely monitor the preterm infant's blood glucose levels and record feeding volumes and mental status. If symptoms of hypoglycemia appear, such as weak crying or refusal to feed, medical staff should be notified immediately.