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

. 2022 Sep;14(9):3575–3597. doi: 10.21037/jtd-22-410

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

2022 Journal of Thoracic Disease. All rights reserved.

Open Access Statement: This is an Open Access article distributed in accordance with the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International License (CC BY-NC-ND 4.0), which permits the non-commercial replication and distribution of the article with the strict proviso that no changes or edits are made and the original work is properly cited (including links to both the formal publication through the relevant DOI and the license). See: https://creativecommons.org/licenses/by-nc-nd/4.0.

PMC Copyright notice

Various OPEP devices. (A) Acapella^® OPEP devices. Acapella^® blue is for individuals who are only able to maintain expiratory flows of <15 liters/minute for 3 seconds and thus for patients with suboptimal inspiratory capacity such as children; and Acapella^® green is for those who are able to maintain expiratory flows of >15 liters/minute for 3 seconds (most adults); Acapella Choice^® can be used by all patients. (B) Aerobika^® OPEP device with a manometer; a manometer guide correlating exhalation pressure with resistance indicator and number of beats per second (Hz) achievable; and the device attached to a nebulizer. OPEP, oscillatory positive expiratory pressure.