Which incubator humidity level is typical for a 26-week gestation infant at one week postnatal age?

• A. 50%
• B. 70%
• C. 90%
• D. 60%

Answer: (B)

Maintaining a humidified incubator helps prevent insensible water loss in extremely premature infants with very immature skin. At 26 weeks gestation, the skin barrier is thin and TEWL (transepidermal water loss) can be substantial, so a humid environment supports skin integrity, fluid balance, and temperature stability as the baby adjusts after birth. By about one week old, many NICUs keep humidity around seventy percent to balance reducing water loss with avoiding excessive moisture that can cause skin maceration or other issues. Lower levels like fifty or sixty percent wouldn’t adequately limit water loss at this stage, while very high humidity such as ninety percent isn’t typically necessary and can introduce other risks.