Impact of Flow Restrictors on Aerosol Delivery of the Respimat® Soft Mist Inhaler.

ABSTRACT:

Introduction

The modification of an inhaler's air flow resistance influences a patient's inhalation flow profile, thereby affecting the exit velocity of an aerosol leaving the Respimat® mouthpiece. A slower inhalation maneuver results in reduced plume velocity and thus a decreased oropharyngeal deposition due to reduced impaction. This could not only lead to fewer unwanted side effects associated with inhaled therapies, but also enhance lung deposition.

Methods

Device prototypes with different air flow resistances were designed using custom-made inserts that can be clipped into the Respimat mouthpiece. The consequences on aerosol characteristics, as well as on in vitro deposition, were analyzed. Computational fluid dynamics simulations contributed to a better understanding o

SUBMITTER: Fleischhauer M 

PROVIDER: S-EPMC12623585 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature