Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2021 Mar 18;11:6219. doi: 10.1038/s41598-021-85634-3

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

© The Author(s) 2021

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

PMC Copyright notice

Changes in the luminal area before and after balloon dilatation of the Eustachian tube. The cross-sectional area was calculated by converting the pixels (per inch) into areas (mm²). The areas of the same location were compared before and after balloon dilatation. In the mid-portion of the Eustachian tube (B), the luminal area increased from 2.282 to 3.018 mm² (A). The widest luminal area was measured at around 10 mm inferior from the isthmus (B). The luminal area ratio before and after balloon dilatation tended to increase as it moved toward the nasopharyngeal opening of the Eustachian tube (C). The a, b, c, and d in (B) indicate corresponding locations presented in Fig. 5.