The Eustachian tube connects the throat and the middle ear (the site of a typical  ear infection ) and allows air to travel between them and equalize the pressures. When the Eustachian tube is temporarily pinched off, pressure can build up in the middle ear.
Visitation is a matter of state law, but generally speaking, every state allows parents to exercise a reasonable amount of visitation with their children, which generally means enough time to establish and maintain a meaningful relationship.
LOUISIANA. A court may award visitation rights if the child's parent is deceased or declared legally incompetent, a grandparent is the parent of the deceased or incompetent parent to the grandchild, and visitation is in the child's best interest.