Figure 3 A: Exposing the auditory vesicle from the horizontal incision of hyoid bone; B: drilling the weakest part of the auditory vesicle; C: Injecting A sterile solution containing OVA 2mg into the hole with A microsyringe, and then sealing it off with A sterile gel sponge; D: Before modeling, observe the eardrum under A microscope for no hyperemia, swelling, or abnormalities in each mark;E: Acute congestion of the eardrum was observed under the microscope on the first day after modeling, and part of it was full.F: The congestion of tympanum was reduced, plump and orange under the microscope on the second day after modeling.