Catheter Blown

Catheter bloating method, the front end of the eustachian tube is curved, the end opening is slightly larger, and it is trumpet-shaped. There is a small ring on the outside of the tip opening, which is opposite to the bending direction of the front end of the catheter and can indicate the direction of the front end. There are two main methods of operation: eustachian tube pillow, nasal septum method.

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