These movements can promote the eustachian tube merge, adjusts the internal ear pressure, reduces or prevents the earache.

Doctors might also administer the steroids dexamethasone or hydrocortisone to a newborn if the infant has low blood pressure or needs a breathing tube for a prolonged period.

Tensile strength of LDPE resin low voltage differential, rigid poor dimensional stability when processing poor, and connection difficulties, not suitable as a water supply pressure tube material.