CLOSED END TUBE INSERTED INTO THE ESOPHAGUS THAT PREVENTS AIR FROM ENTERING THE STOMACH AND THROUGH WHICH AIR IS DIRECTED TO THE LUNGS BY WAY OF THE TRACHEA

Medical diagnostic reagents and assays for testing of body fluids, namely, for eosinophilic esophagitis (EoE) testing, for lab-developed tests (LDT) for EoE -associated biomarkers, and for biomarker level tests from a mucosal sample

medical devices, namely, esophogeal stents