Iatrogenic hyperosmolality in critically ill low-birth-weight infants

Area of Science:

• Neonatal Medicine
• Pediatric Critical Care
• Clinical Chemistry

Background:

• Critically ill, very low-birth-weight infants often require intensive intravenous fluid and nutritional support.
• Acidosis is a common complication in these neonates, necessitating interventions like sodium bicarbonate administration.
• The use of hyperosmolar solutions for fluid and caloric management can pose significant risks.

Purpose of the Study:

• To investigate the impact of intravenous infusion therapy on serum osmolality in critically ill, very low-birth-weight infants.
• To identify the contributing factors to hyperosmolality during treatment.
• To discuss the potential consequences of hyperosmolality in this vulnerable population.

Main Methods:

• Studied 24 critically ill, very low-birth-weight newborn infants.
• Administered continuous intravenous infusion of glucose and sodium bicarbonate.
• Monitored blood parameters including glucose, lactate, sodium, urea nitrogen, osmolality, and acid-base status.

Main Results:

• Continuous intravenous infusion therapy resulted in a progressive increase in mean plasma osmolality.
• Elevated blood glucose, sodium, and urea levels were observed concurrently with rising osmolality.
• The highest mean plasma osmolality readings were recorded immediately before or after death.

Conclusions:

• Vigorous intravenous infusion therapy, particularly with hyperosmolar solutions like sodium bicarbonate and glucose, frequently leads to hyperosmolality in neonates.
• Simultaneous increases in plasma sodium and glucose, along with rising blood urea, contribute significantly to this condition.
• Hyperosmolality poses risks, including potential brain injury, in critically ill newborns requiring intensive care.