Small tube used to give a baby oxygen.

Feeding using a fine, soft tube (nasogastric tube) passed through the nose or mouth into the stomach.

This is a long, thin, soft plastic tube that is passed via a baby's nose into his/her stomach. This tube is used to give milk to a baby until he/she is strong enough to take milk from the breast or a bottle. Sometimes the tube is passed through the mouth and into the stomach.

The first four weeks of a baby's life (up to 28 days).

This occurs when a section of the wall of the intestine is swollen or inflamed because of damage to the lining. It is often linked to a period in which the blood flow to the gut wall has been reduced. The abdomen may swell up, and blood is passed through the bowels. Air penetrates the wall of the digestive tract. Sometimes, though rarely, the hole may form a perforation in the gut wall and need surgery.

Neonatal intensive care unit.

This is normally produced in the body to relax blood vessels and so improves blood flow to all parts of the body. When the blood vessels to the lungs remain narrowed, nitric oxide is sometimes given in the inhaled air and oxygen to cause them to relax and allow blood flow to the lungs.

Neonatal unit.