Natsu with Lisanna, watching over their Dragon Egg. One day, Natsu found an egg in the forest east of Magnolia. Thinking it to be a Dragon Egg, Natsu took it to the guild and asked Makarov to make it hatch, but Makarov and Erza told him that he was the only one that could make the egg hatch; through love and care.
1 As a Decompression Chamberâ This is a hyperbaric chamber used by surface-supplied divers (commercial divers mostly) to make their decompression stops.  As Recompression chamberâ A hyperbaric chamber is used to treat or prevent patients suffering from decompression sickness.
Decompression is a surgical procedure to relieve pressure and alleviate pain caused by this impingement. A small portion of the bone over the nerve root, called lamina, and/or disc material from under the nerve root is removed to give the nerve more space. There are 3 common types of spinal decompression procedures, all of which can be done using minimally invasive techniques: