Effects of High-Flow Nasal Cannula on End-Expiratory Lung Impedance in Semi-Seated Healthy Subjects.
BACKGROUND: High-flow nasal cannula (HFNC) enables delivery of humidified gas at high flow while controlling the .... Although its use is growing in patients with acute respiratory failure, little is known about the impact of HFNC on lung volume. Therefore, we aimed to assess lung volume changes in...
| Publicado en: | Respiratory Care Vol. 63; no. 8; pp. 1016 - 1024 |
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| Autores principales: | , , , , , , , , , , |
| Formato: | pictorial research tables/charts Journal Article |
| Publicado: |
Mary Ann Liebert, Inc.
Aug2018
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=130908939&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 130908939 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 00201324 4GG jtl: Respiratory Care issn: 00201324 maglogo: N pubinfo: dt: Aug2018 vid: 63 iid: 8 pid: 1365 pub: Mary Ann Liebert, Inc. place: New Rochelle, New York artinfo: ui: 130908939 130908939 130908939 10.4187/respcare.06031 130908939 ppf: 1016 ppct: 8 formats: fmt: @attributes: type: P tig: atl: Effects of High-Flow Nasal Cannula on End-Expiratory Lung Impedance in Semi-Seated Healthy Subjects. aug: au: Plotnikow, Gustavo A. Thille, Arnaud W. Vasquez, Daniela N. Pratto, Romina A. Quiroga, Corina M. Andrich, Maria E. Dorado, Javier H. Gomez, Ramiro S. D'Annunzio, Pablo A. Scapellato, Jose L. Intile, Dante affil: Division of Respiratory Care, Intensive Care Unit, Anchorena Hospital, Buenos Aires, Argentina sug: subj: Nasal Cannula Utilization Electric Impedance Evaluation Human Post Hoc Analysis Prospective Studies Descriptive Statistics Data Analysis Software Male Female Adult Wilcoxon Signed Rank Test Oxygen Therapy Tomography Adult: 19-44 years Male Female ab: BACKGROUND: High-flow nasal cannula (HFNC) enables delivery of humidified gas at high flow while controlling the .... Although its use is growing in patients with acute respiratory failure, little is known about the impact of HFNC on lung volume. Therefore, we aimed to assess lung volume changes in healthy subjects at different flows and positions. METHODS: This was a prospective physiological study performed in 16 healthy subjects. The changes in lung volumes were assessed by measuring end-expiratory lung impedance by using electrical impedance tomography. All the subjects successively breathed during 5 min in these following conditions: while in a supine position without HFNC (T0) and 3 measurements in a semi-seated position at 45° without HFNC (T1), and with HFNC at a flow of 30 L/min (T2), and 50 L/min (T3). RESULTS: Compared with the supine position, the values of end-expiratory lung impedance significantly increased with the subjects in a semi-seated position. End-expiratory lung impedance significantly increased after HFNC initiation in subjects in a semi-seated position and further increased by increasing flow at 50 L/min. When taking the end-expiratory lung impedance measurement in subjects in a semiseated position (T1) as reference, the differences among the medians of global end-expiratory lung impedance were statistically significant (P < .001), which amounted to 1.05 units in T1; 1.12 units in T2; and 1.44 units in T3 (P < .05 for all comparisons, Wilcoxon test). The breathing frequency did not differ between the supine and semi-seated position (T0 and T1) but significantly decreased after initiation of HFNC and further decreased at high flow. T0 and T1 were not different (P = .13); whereas there was a statistically significant difference among T1, T2, and T3 (P < .05, post hoc test with Bonferroni correction). CONCLUSIONS: In healthy subjects, the semi-seated position and the use of HFNC increased end-expiratory lung impedance globally. These changes were accompanied by a significant decrease in the breathing frequency. pubtype: Academic Journal doctype: pictorial research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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