NASO/OROGASTRIC TUBE HAVING ONE OR MORE BACKFLOW BLOCKING ELEMENTS, BACKFLOW BLOCKING ELEMENTS, AND A METHOD OF USING BACKFLOW BLOCKING ELEMENTS

摘要

A naso/orogastric device that comprises a naso/orogastric tube sized and shaped for being disposed within the esophagus so that at least a distal segment thereof being placed in the stomach lumen of a patient and at least one self expending element disposed around a peripheral surface of the naso/orogastric tube and having a first thickness in a compressed state and a second thickness in an expanded state, the at least one self expending element switching from the compressed state to the expanded state when absorbing moisture. The first thickness is thinner than the second thickness.