The application discloses a tympanic
ventilation tube with spiral locking, multiple waterproof and valve control drainage functions, and belongs to the field of ear
implant medical devices. The
ventilation tube comprises a tube body, an
implant device interface is arranged at the outermost end of the tube body, a one-way duckbill valve is arranged at the end close to the external
auditory canal, micro-flow ventilation holes are distributed in the circumferential direction of the side wall, a flexible sealing sheet is arranged on the outer side of the tube body, and a continuous single-ring gradually-changing asymmetric spiral fixing structure is arranged on the outer periphery of the
middle ear cavity. The spiral fixing structure induces the radial
flanging of the tympanic membrane tissue to be embedded between the spiral structure and the outer wall of the tube body to form axial locking through the asymmetric section, and realizes gradual release when reversely rotating through the rise angle, tooth height and round angle gradient; the sealing sheet realizes stable adhesion and controllable peeling through the thickness gradient, pre-stress and
surface energy gradient; the micro-flow ventilation holes and the duckbill valve constitute a gas-liquid separation double channel, realize low-resistance ventilation, liquid blocking and pressure-driven drainage. The application can realize
stable fixation, water-tight sealing, controllable ventilation, one-way drainage and low-damage implantation and removal.