Filters Alter the Performance of Noninvasive Ventilators.
COVID-19
benchtop study
infectious diseases
noninvasive ventilation
respiratory failure
Journal
Respiratory care
ISSN: 1943-3654
Titre abrégé: Respir Care
Pays: United States
ID NLM: 7510357
Informations de publication
Date de publication:
07 2022
07 2022
Historique:
pubmed:
25
5
2022
medline:
23
6
2022
entrez:
24
5
2022
Statut:
ppublish
Résumé
Noninvasive ventilation is recommended in hypercapnic respiratory failure secondary to ventilatory failure. Noninvasive ventilation may contribute to aerosol dispersion, which may increase the risk of transmission of COVID 2019. The addition of filters to the ventilator circuit has been recommended to reduce this risk. The aim of this benchtop study was to investigate the impact of adding filters to a ventilator circuit. In this benchtop study, a breathing simulator was used with 4 commonly used ventilators. Ventilators were set to approximate the typical settings that are used for patients on long-term noninvasive ventilation. Ventilator performance was then evaluated with 3 circuit configurations in place: circuit A: no filter in situ; circuit B: 1 filter at the simulator end of the circuit; and circuit C: 1 filter at the simulator end of the circuit and a second filter at the ventilator end of the circuit. Ventilator variables were impacted by the addition of filters. Measurements of peak pressure ( This study demonstrated that ventilator settings established with filters in situ are not applicable if the ventilator is used without the filters. This is an important clinical consideration for patients who are hospitalized and require noninvasive ventilation in the COVID 2019 era.
Sections du résumé
BACKGROUND
Noninvasive ventilation is recommended in hypercapnic respiratory failure secondary to ventilatory failure. Noninvasive ventilation may contribute to aerosol dispersion, which may increase the risk of transmission of COVID 2019. The addition of filters to the ventilator circuit has been recommended to reduce this risk. The aim of this benchtop study was to investigate the impact of adding filters to a ventilator circuit.
METHODS
In this benchtop study, a breathing simulator was used with 4 commonly used ventilators. Ventilators were set to approximate the typical settings that are used for patients on long-term noninvasive ventilation. Ventilator performance was then evaluated with 3 circuit configurations in place: circuit A: no filter in situ; circuit B: 1 filter at the simulator end of the circuit; and circuit C: 1 filter at the simulator end of the circuit and a second filter at the ventilator end of the circuit.
RESULTS
Ventilator variables were impacted by the addition of filters. Measurements of peak pressure (
CONCLUSIONS
This study demonstrated that ventilator settings established with filters in situ are not applicable if the ventilator is used without the filters. This is an important clinical consideration for patients who are hospitalized and require noninvasive ventilation in the COVID 2019 era.
Identifiants
pubmed: 35610028
pii: respcare.09365
doi: 10.4187/respcare.09365
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
795-800Informations de copyright
Copyright © 2022 by Daedalus Enterprises.
Déclaration de conflit d'intérêts
Dr Howard reports provision of equipment from ResMed and Philips Respironics. The other authors have disclosed no conflicts of interest.