In an incubator, which feature allows attachment of supplemental oxygen?

• A. Inlet nipple on incubator allows attachment of O2
• B. The lever position controls the level of O2
• C. O2 can be bled in with tubing and a blender through an opening
• D. A heated humidifier is required for O2 delivery

Answer: (A)

The key idea is that neonatal incubators provide a dedicated oxygen inlet so you can connect an oxygen source directly to the chamber. This inlet, often called a nipple or port, is designed to securely accept tubing from a regulator/blender and deliver a controlled FiO2 into the incubator while maintaining the chamber’s temperature and humidity. The other options don’t represent the built-in mechanism that allows attachment: a lever to set O2 isn’t a standard control in most incubators, and while you could route oxygen through tubing and a blender, the incubator needs that specific inlet port to connect safely. A heated humidifier is part of the oxygen delivery pathway but doesn’t provide the attachment point itself.