1. Hygrometric Performances of Different High-Flow Nasal Cannula Devices: Bench Evaluation and Clinical Tolerance
- Author
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Pierre-Alexandre Bouchard, Serge Simard, François Lellouche, Mathieu Delorme, Equipe de Recherche Paramédicale sur le Handicap NeuroMoteur (ERPHAN), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Paris-Saclay, American Thoracic Society, ATS, Dr Lellouche presented a version of this paper at the European Society of Intensive Care Medicine Congress, held in Berlin, Germany, in 2015, and at the American Thoracic Society Congress, held in San Francisco, California, in 2016.Devices and consumables were provided by Fisher & Paykel Healthcare, Vapotherm, and Hydrate, who had no other involvement in the study. The study was supported by the Groupe de Recherche en Sant? Respiratoire de l?Universit? Laval (GESER).The authors would like to thank all participants who accepted being enrolled as healthy subjects in this study., and Devices and consumables were provided by Fisher & Paykel Healthcare, Vapotherm, and Hydrate, who had no other involvement in the study. The study was supported by the Groupe de Recherche en Santé Respiratoire de l’Université Laval (GESER).
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Pulmonary and Respiratory Medicine ,[SDV]Life Sciences [q-bio] ,Critical Care and Intensive Care Medicine ,medicine.disease_cause ,Psychrometry ,Healthy volunteers ,Medicine ,Cannula ,Humans ,Absolute humidity ,Original Research ,Noninvasive Ventilation ,business.industry ,Breathing comfort ,Respiration ,Healthy subjects ,Oxygen Inhalation Therapy ,Temperature ,General Medicine ,Compensation algorithm ,Humidification performances ,Anesthesia ,High-flow nasal cannula ,Breathing ,Noninvasive ventilation ,High flow ,business ,Respiratory Insufficiency ,Nasal cannula - Abstract
BACKGROUND: High-flow nasal cannula (HFNC) is increasingly used for the management of respiratory failure. Settings include [Formula: see text] , total gas flow, and temperature target. Resulting absolute humidity (AH) at the nasal cannula may affect clinical tolerance, and optimal settings with respect to hygrometry remain poorly documented. METHODS: A bench study was designed to assess AH delivered by 4 HFNC devices (Optiflow, Airvo 2, Precision Flow, and Hydrate) according to flow, ambient temperature, and other available settings. Clinical tolerance of different levels of hygrometry (20, 30, and 40 mg H(2)O/L) was evaluated in 15 healthy volunteers. RESULTS: With [Formula: see text] set at 1.0, normal ambient temperature, and settings made accordingly to the manufacturers’ recommendations, mean ± SD AH was 42.2 ± 3.1, 39.5 ± 1.8, 35.7 ± 2.0, and 32.9 ± 2.7 mg H(2)O/L for the Airvo 2, Optiflow, Hydrate, and Precision Flow, respectively, (P < .001). AH dropped from −3.5 to −10.7 mg H(2)O/L (P
- Published
- 2021