After tympanic tube placement, the fluid can be continuously drained using a ventilation tube or aspirated through a puncture needle. 1. Continuous drainage with a ventilation tube: This is done by placing the patient under general or local anesthesia, and with the cooperation of an inner otoscope or microscope, a ventilation tube is placed in the tympanic membrane so as to suction out the fluid in the ear canal, and the long-term placement of the ventilation tube can drain out the fluid in the middle ear. 2. Puncture needle extraction: the ventilation tube is a small tube placed in the eardrum, this tube towards the middle ear cavity on this side, there will be a protruding thing on the edge, so that the protruding thing, just to be able to stuck in the eardrum, you can use a puncture needle through the lumen of the tube placed to draw out the fluid. Therefore, patients after tympanic tube placement must keep the external ear canal dry, no water, but also to avoid colds, colds may affect the effectiveness of the tympanic tube placement, but also to carry out regular review.