Exhaled air dispersion during noninvasive ventilation via helmets and a total facemask.

ABSTRACT:

Background

Noninvasive ventilation (NIV) via helmet or total facemask is an option for managing patients with respiratory infections in respiratory failure. However, the risk of nosocomial infection is unknown.

Methods

We examined exhaled air dispersion during NIV using a human patient simulator reclined at 45° in a negative pressure room with 12 air changes/h by two different helmets via a ventilator and a total facemask via a bilevel positive airway pressure device. Exhaled air was marked by intrapulmonary smoke particles, illuminated by laser light sheet, and captured by a video camera for data analysis. Significant exposure was defined as where there was ≥ 20% of normalized smoke concentration.

Results

During NIV via a helmet with the simulator programmed in mild

SUBMITTER: Hui DS 

PROVIDER: S-EPMC7094250 | biostudies-literature | 2015 May

REPOSITORIES: biostudies-literature