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Lena E, Comuzzi L, Ajčević M, Tarchini M, Moro E, Baso B, Dal Zilio G, Palmisano S, Roman Pognuz E, Fernández R, Lucangelo U. Lung Volume and Ventilation Distribution After Bariatric Surgery: High-Flow Nasal Cannula Versus CPAP. Respir Care 2024; 69:990-998. [PMID: 38744475 PMCID: PMC11298223 DOI: 10.4187/respcare.11356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2024]
Abstract
BACKGROUND Patients with obesity are at increased risk of postoperative pulmonary complications. CPAP has been used successfully to prevent and treat acute respiratory failure, but in many clinical scenarios, high-flow nasal cannula (HFNC) therapy is emerging as a possible alternative. We aimed to compare HFNC and CPAP in a sequential study measuring their effects on gas exchange, lung volumes, and gas distribution within the lungs measured through electrical impedance tomography (EIT). METHODS We enrolled 15 subjects undergoing laparoscopic bariatric surgery. Postoperatively they underwent the following oxygen therapy protocol (10 min/step): baseline air-entrainment mask, HFNC at increasing (40, 60, 80, and 100 L/min) and decreasing flows (80, 60, and 40 L/min), washout air-entrainment mask and CPAP (10 cm H2O). Primary outcome was the change in end-expiratory lung impedance (ΔEELI) measured by EIT data processing. Secondary outcomes were changes of global inhomogeneity (GI) index and tidal impedance variation (TIV) measured by EIT, arterial oxygenation, carbon dioxide content, pH, respiratory frequency, and subject's comfort. RESULTS Thirteen subjects completed the study. Compared to baseline, ΔEELI was higher during 10 cm H2O CPAP (P = .001) and HFNC 100 L/min (P = .02), as well as during decreasing flows HFNC 80, 60, and 40 L/min (P = .008, .004, and .02, respectively). GI index was lower during HFNC 100 compared to HFNC 60increasing (P = .044), HFNC 60decreasing (P = .02) HFNC 40decreasing (P = .01), and during 10 cm H2O CPAP compared to washout period (P = .01) and HFNC 40decreasing (P = .03). TIV was higher during 10 cm H2O CPAP compared to baseline (P = .008). Compared to baseline, breathing frequency was lower at HFNC 60increasing, HFNC 100, and HFNC 80decreasing (P = .01, .02, and .03, respectively). No differences were detected regarding arterial oxygenation, carbon dioxide content, pH, and subject's comfort. CONCLUSIONS HFNC at a flow of 100 L/min induced postoperative pulmonary recruitment in bariatric subjects, with no significant differences compared to 10 cm H2O CPAP in terms of lung recruitment and ventilation distribution.
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Affiliation(s)
- Enrico Lena
- Department of Anesthesia and Intensive Care, Cattinara Hospital, ASUGI, Trieste, Italy
| | - Lucia Comuzzi
- Department of Anesthesia and Intensive Care, Cattinara Hospital, ASUGI, Trieste, Italy
| | - Milos Ajčević
- Department of Engineering and Architecture, University of Trieste, Trieste, Italy
| | - Martina Tarchini
- Department of Anesthesia and Intensive Care, Cattinara Hospital, ASUGI, Trieste, Italy
| | - Edoardo Moro
- Department of Anesthesia and Intensive Care, Cattinara Hospital, ASUGI, Trieste, Italy
| | - Beatrice Baso
- Department of Anesthesia and Intensive Care, Cattinara Hospital, ASUGI, Trieste, Italy
| | - Giorgia Dal Zilio
- Department of Anesthesia and Intensive Care, Cattinara Hospital, ASUGI, Trieste, Italy
| | - Silvia Palmisano
- Department of Medical, Surgical and Health Sciences, University of Trieste, Trieste, Italy; and Surgical Clinic Unit, Cattinara Hospital, ASUGI, Trieste, Italy
| | - Erik Roman Pognuz
- Department of Anesthesia and Intensive Care, Cattinara Hospital, ASUGI, Trieste, Italy
| | - Rafael Fernández
- Intensive Care Unit, Althaia Xarxa Assistencial Universitària de Manresa, Manresa, CIBERES, Spain
| | - Umberto Lucangelo
- Department of Anesthesia and Intensive Care, Cattinara Hospital, ASUGI, Trieste, Italy
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Shallik N, Bashir K, Elmoheen A, Iftikhar H, Zaki HA. High flow nasal oxygen (HFNO) in the treatment of COVID-19 infection of adult patients from - An emergency perspective: A systematic review and meta-analysis. TRENDS IN ANAESTHESIA AND CRITICAL CARE 2023; 50:101238. [PMID: 38620122 PMCID: PMC10111871 DOI: 10.1016/j.tacc.2023.101238] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Revised: 03/08/2023] [Accepted: 04/02/2023] [Indexed: 03/25/2024]
Abstract
Coronavirus disease 2019 (COVID-19) is an infectious disease caused by SARS-CoV-2, which was first discovered in Wuhan, China. The disease has grown into a global pandemic causing mild to moderate symptoms in most people. The disease can also exhibit serious illnesses, especially for patients with other chronic diseases such as cardiovascular diseases, diabetes, chronic respiratory disease, or cancer. In such cases of severe illness, high flow nasal oxygen (HFNO) has been used to provide oxygenation to COVID-19 patients. However, the efficiency of HFNO remains uncertain, prompting the conduction of this systematic review to evaluate the effectiveness of the therapy. A thorough search for relevant and original articles was carried out on five electronic databases, including ScienceDirect, PubMed, Cochrane Library, Embase, and Google Scholar. No time limitation was placed during the search as it included all the articles related to COVID-19 from 2019 to 2022. The search strategy utilized in this systematic review yielded 504 articles, of which only 10 met the eligibility criteria and were included. Our meta-analysis reveals that HFNO success rate was higher than HFNO failure rates (0.52 (95% CI; 0.47, 0.56) and 0.48 (95% CI; 0.44, 0.53), respectively), however, the difference was statistically insignificant. HFNO was associated with a significant decrease in mortality and intubation rates (0.28 (95% CI; 0.19, 0.39) and 0.28 (95% CI; 0.18, 0.41), respectively). Our statistical analysis has shown that significantly lower ROX index (5.07 ± 1.66, p = 0.028) and PaO2/FiO2 (100 ± 27.51, p = 0.031) are associated with HFNO failure, while a significantly lower respiratory rate (RR) (23.17 ± 4.167, p = 0.006) is associated with HFNO success. No statistically significant difference was observed in SpO2/FiO2 ratio between the HFNO success and failure groups (154.23 ± 42.74 vs. 124.025 ± 28.50, p = 0.62, respectively). Based on the results from our meta-analysis, the success or failure of HFNO in treating COVID-19 adult patients remains uncertain. However, HFNO has been shown to be an effective treatment in reducing mortality and intubation rates. Therefore, HFNO can be recommended for COVID-19 patients but with close monitoring and should be carried out by experienced healthcare workers.
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Affiliation(s)
- Nabil Shallik
- Anaesthesia, ICU and Perioperative Medicine Department, Hamad Medical Corporation, Doha, Qatar
- Clinical Anaesthesia Department, Weill Cornell Medical College in Qatar, Doha, Qatar
- Clinical Anaesthesia Department, College of Medicine Qatar University, Doha, Qatar
- Clinical Anaesthesia and SICU Department, Tanta University, Tanta, Egypt
| | - Khalid Bashir
- Emergency Medicine Department, Hamad Medical Corporation, Doha, Qatar
- The College of Medicine QU Health, Qatar University, Doha, Qatar
| | - Amr Elmoheen
- Emergency Medicine Department, Hamad Medical Corporation, Doha, Qatar
- The College of Medicine QU Health, Qatar University, Doha, Qatar
| | - Haris Iftikhar
- Emergency Medicine Department, Hamad Medical Corporation, Doha, Qatar
| | - Hany A Zaki
- Emergency Medicine Department, Hamad Medical Corporation, Doha, Qatar
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Slobod D, Spinelli E, Crotti S, Lissoni A, Galazzi A, Grasselli G, Mauri T. Effects of an asymmetrical high flow nasal cannula interface in hypoxemic patients. Crit Care 2023; 27:145. [PMID: 37072854 PMCID: PMC10111067 DOI: 10.1186/s13054-023-04441-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Accepted: 04/12/2023] [Indexed: 04/20/2023] Open
Abstract
BACKGROUND Optimal noninvasive respiratory support for patients with hypoxemic respiratory failure should minimize work of breathing without increasing the transpulmonary pressure. Recently, an asymmetrical high flow nasal cannula (HFNC) interface (Duet, Fisher & Paykel Healthcare Ltd), in which the caliber of each nasal prong is different, was approved for clinical use. This system might reduce work of breathing by lowering minute ventilation and improving respiratory mechanics. METHODS We enrolled 10 patients ≥ 18 years of age who were admitted to the Ospedale Maggiore Policlinico ICU in Milan, Italy, and had a PaO2/FiO2 < 300 mmHg during HFNC support with a conventional cannula. We investigated whether the asymmetrical interface, compared to a conventional high flow nasal cannula, reduces minute ventilation and work of breathing. Each patient underwent support with the asymmetrical interface and the conventional interface, applied in a randomized sequence. Each interface was provided at a flow rate of 40 l/min followed by 60 l/min. Patients were continuously monitored with esophageal manometry and electrical impedance tomography. RESULTS Application of the asymmetrical interface resulted in a -13.5 [-19.4 to (-4.5)] % change in minute ventilation at a flow rate of 40 l/min, p = 0.006 and a -19.6 [-28.0 to (-7.5)] % change at 60 l/min, p = 0.002, that occurred despite no change in PaCO2 (35 [33-42] versus 35 [33-43] mmHg at 40 l/min and 35 [32-41] versus 36 [32-43] mmHg at 60 l/min). Correspondingly, the asymmetrical interface lowered the inspiratory esophageal pressure-time product from 163 [118-210] to 140 [84-159] (cmH2O*s)/min at a flow rate of 40 l/min, p = 0.02 and from 142 [123-178] to 117 [90-137] (cmH2O*s)/min at a flow rate of 60 l/min, p = 0.04. The asymmetrical cannula did not have any impact on oxygenation, the dorsal fraction of ventilation, dynamic lung compliance, or end-expiratory lung impedance, suggesting no major effect on PEEP, lung mechanics, or alveolar recruitment. CONCLUSIONS An asymmetrical HFNC interface reduces minute ventilation and work of breathing in patients with mild-to-moderate hypoxemic respiratory failure supported with a conventional interface. This appears to be primarily driven by increased ventilatory efficiency due to enhanced CO2 clearance from the upper airway.
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Affiliation(s)
- Douglas Slobod
- Department of Anesthesia, Critical Care and Emergency, Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico, Via F. Sforza 35, 20122, Milan, Italy
- Department of Critical Care Medicine, McGill University, Montreal, Canada
| | - Elena Spinelli
- Department of Anesthesia, Critical Care and Emergency, Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico, Via F. Sforza 35, 20122, Milan, Italy
| | - Stefania Crotti
- Department of Anesthesia, Critical Care and Emergency, Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico, Via F. Sforza 35, 20122, Milan, Italy
| | - Alfredo Lissoni
- Department of Anesthesia, Critical Care and Emergency, Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico, Via F. Sforza 35, 20122, Milan, Italy
| | - Alessandro Galazzi
- Department of Healthcare Professions, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Giacomo Grasselli
- Department of Anesthesia, Critical Care and Emergency, Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico, Via F. Sforza 35, 20122, Milan, Italy
- Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy
| | - Tommaso Mauri
- Department of Anesthesia, Critical Care and Emergency, Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico, Via F. Sforza 35, 20122, Milan, Italy.
- Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy.
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Carratalá JM, Diaz-Lobato S, Brouzet B, Más-Serrano P, Rocamora JLS, Castro AG, Varela AG, Alises SM. Efficacy and safety of high-flow nasal cannula therapy in elderly patients with acute respiratory failure. Pulmonology 2023:S2531-0437(23)00007-7. [PMID: 36792391 PMCID: PMC9923444 DOI: 10.1016/j.pulmoe.2023.01.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Revised: 01/12/2023] [Accepted: 01/12/2023] [Indexed: 02/16/2023] Open
Abstract
INTRODUCTION To assess the efficacy and safety of high-flow nasal cannula (HFNC) in elderly patients with acute respiratory failure (ARF) not due to COVID-19, refractory to treatment with conventional oxygen therapy and/or intolerant to noninvasive ventilation (NIV) or continuous positive airway pressure (CPAP) and without criteria for admission to intensive care units (ICU). METHODS Prospective observational study of patients with ARF treated with HFNC who presented clinical and arterial blood gas deterioration after 24 h of medical treatment and oxygenation by conventional systems. The degree of dyspnoea, gas exchange parameters (arterial O2 pressure/inspired O2 fraction ratio (PaO2/FiO2); oxygen saturation measured by oximetry/ inspired fraction of oxygen (Sp02/Fi02), ROX index), degree of patient tolerance and mortality were evaluated. These were measured at discharge from the emergency department (ED), 24 h after treatment with conventional oxygenation and 60, 120 min and 24 h after initiation of HFNC. The results were analyzed for all patients as a whole and for patients with hypercapnia (arterial carbon dioxide tension (PaCO2) < 45 mmHg) separately. RESULTS 200 patients were included in the study between November 2019 and November 2020, with a mean age of 83 years, predominantly women (61.9%), obese (Body Mass Index (BMI) 31.1), with high comorbidity (Charlson index 4) and mild-moderate degree of dependence (Barthel 60). A number of 128 patients (64%) were hypercapnic. None had respiratory acidosis (pH 7.39). Evaluation at 60 min, 120 min and 24 h showed significant improvement in all patients and in the subgroup of hypercapnic patients with respect to baseline parameters in respiratory rate (RR), dyspnoea, ROX index, PaO2/FiO2, SpO2/FiO2 and patient comfort. No changes in PaCO2 or level of consciousness were observed. HFNC was well tolerated. Ten patients (5%) died due to progression of the disease causing ARF. CONCLUSIONS HFNC is an effective and safe alternative in elderly patients with ARF not due to COVID-19, refractory to treatment with conventional oxygen therapy and/or intolerant to NIV or CPAP and without criteria for admission to ICU.
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Affiliation(s)
- J M Carratalá
- Emergency Department, Unidad de Corta Estancia y Hospitalización a Domicilio, Hospital General de Alicante; Instituto de Investigación Sanitaria y Biomédica de Alicante (ISABIAL-Fundación FISABIO), Alicante. Spain
| | - S Diaz-Lobato
- Pulmonology Department Hospital Universitario HLA Moncloa, Nippon Gases Healthcare, Universidad Europea, Madrid, Spain.
| | - B Brouzet
- Emergency Department, Unidad de Corta Estancia y Hospitalización a Domicilio, Hospital General de Alicante; Instituto de Investigación Sanitaria y Biomédica de Alicante (ISABIAL-Fundación FISABIO), Alicante. Spain
| | - P Más-Serrano
- Pharmacy Department Hospital General de Alicante, Instituto de Investigación Sanitaria y Biomédica de Alicante (ISABIAL-Fundación FISABIO), Alicante, Spain; División de Farmacia y Tecnología Farmacéutica, Universidad Miguel Hernández, Elche, Spain
| | - J L S Rocamora
- Emergency Department, Hospital de Villarrobledo, Albacete, Spain
| | - A G Castro
- Emergency Department, SAMU Asturias, Spain
| | - A G Varela
- Emergency Department, Hospital Universitario Central de Asturias HUCA, Oviedo, Spain
| | - S M Alises
- Pulmonology Department, Hospital Quironsalud San José, Madrid, Spain
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Tatkov S, Rees M, Gulley A, van den Heuij LGT, Nilius G. Asymmetrical nasal high flow ventilation improves clearance of CO 2 from the anatomical dead space and increases positive airway pressure. J Appl Physiol (1985) 2023; 134:365-377. [PMID: 36633864 PMCID: PMC9886347 DOI: 10.1152/japplphysiol.00692.2022] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Positive airway pressure that dynamically changes with breathing, and clearance of anatomical dead space are the key mechanisms of noninvasive respiratory support with nasal high flow (NHF). Pressure mainly depends on flow rate and nare occlusion. The hypothesis is that an increase in asymmetrical occlusion of the nares leads to an improvement in dead-space clearance resulting in a reduction in re-breathing. Clearance was investigated with volumetric capnography in an adult upper-airway model, which was ventilated by a lung simulator with entrained carbon dioxide (CO2) at respiratory rates (RR) of 15-45 min-1 and at 18 min-1 with chronic obstructive pulmonary disease (COPD) breathing patterns. Clearance was assessed at NHF of 20-60 L/min with a symmetrical interface (SI) and an asymmetrical interface (AI). CO2 kinetics visualized by infrared spectroscopy and mathematical modeling were used to study the mechanisms of clearance. At a higher RR (35 min-1) and NHF of 60 L/min, clearance in the upper airway was significantly higher with the AI when compared with the SI (29.64 ± 9.96%, P < 0.001), as opposed to at a lower RR (15 min-1) (1.40 ± 6.25%, P > 0.05), (means ± SD). With COPD breathing, clearance by NHF was reduced but significantly improved with the AI by 45.93% relative to the SI at NHF 20 L/min (P < 0.0001). The maximum pressure achieved with the AI was 6.6 cmH2O and NHF was 60 L/min at the end of expiration. Pressure differences between nasal cavities led to the reverse flow observed in the optical model. Asymmetrical NHF increases dead-space clearance by reverse flow through the choanae and accelerates purging of expired gas via the less occluded nare.NEW & NOTEWORTHY The asymmetrical interface generated reverse flow in the nasal cavities and across the choana, which led to unidirectional purging of expired gas from the upper airways. This accelerated the clearance of anatomical dead space and reduced re-breathing while increased resistance to flow resulted in higher positive end-expiratory pressure (PEEP). These findings are relevant to patients with elevated respiratory rates or with expiratory flow limitations where dead-space clearance by NHF can be substantially reduced.
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Affiliation(s)
| | - Monique Rees
- 1Fisher & Paykel Healthcare Ltd., Auckland, New Zealand
| | - Anton Gulley
- 1Fisher & Paykel Healthcare Ltd., Auckland, New Zealand
| | | | - Georg Nilius
- 2Evang. Kliniken Essen-Mitte GmbH, Essen, Germany,3Universität Witten/Herdecke, Witten, Germany
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Whitney J, Keir I. Clinical review of high-flow nasal oxygen therapy in human and veterinary patients. Front Vet Sci 2023; 10:1070881. [PMID: 36950541 PMCID: PMC10027015 DOI: 10.3389/fvets.2023.1070881] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2022] [Accepted: 02/02/2023] [Indexed: 03/08/2023] Open
Abstract
Oxygen therapy is the first-line treatment for hypoxemic acute respiratory failure. In veterinary medicine this has traditionally been provided via mask, low-flow nasal oxygen cannulas, oxygen cages and invasive positive pressure ventilation. Traditional non-invasive modalities are limited by the maximum flow rate and fraction of inspired oxygen (FiO2) that can be delivered, variability in oxygen delivery and patient compliance. The invasive techniques are able to provide higher FiO2 in a more predictable manner but are limited by sedation/anesthesia requirements, potential complications and cost. High-flow nasal oxygen therapy (HFNOT) represents an alternative to conventional oxygen therapy. This modality delivers heated and humidified medical gas at adjustable flow rates, up to 60 L/min, and FiO2, up to 100%, via nasal cannulas. It has been proposed that HFNOT improves pulmonary mechanics and reduces respiratory fatigue via reduction of anatomical dead space, provision of low-level positive end-expiratory pressure (PEEP), provision of constant FiO2 at rates corresponding to patient requirements and through improved patient tolerance. Investigations into the use of HFNOT in veterinary patients have increased in frequency since its clinical use was first reported in dogs with acute respiratory failure in 2016. Current indications in dogs include acute respiratory failure associated with pulmonary parenchymal disease, upper airway obstruction and carbon monoxide intoxication. The use of HFNOT has also been advocated in certain conditions in cats and foals. HFNOT is also being used with increasing frequency in the treatment of a widening range of conditions in humans. Although there remains conflict regarding its use and efficacy in some patient groups, overall these reports indicate that HFNOT decreases breathing frequency and work of breathing and reduces the need for escalation of respiratory support. In addition, they provide insight into potential future veterinary applications. Complications of HFNOT have been rarely reported in humans and animals. These are usually self-limiting and typically result in lower morbidity and mortality than those associated with invasive ventilation techniques.
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Chen X, Tan C, Jiang H. High-flow nasal cannula oxygen therapy is superior to conventional oxygen therapy in intensive care unit patients after extubation. Am J Transl Res 2023; 15:1239-1246. [PMID: 36915743 PMCID: PMC10006799] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Accepted: 12/29/2022] [Indexed: 03/16/2023]
Abstract
BACKGROUND Optimal oxygen supply is the cornerstone of the management of critically ill patients after extubation. High flow oxygen system is an alternative to standard oxygen therapy. This research explored the efficacy of high-flow nasal cannula (HFNC) oxygen therapy in patients after extubation in the intensive care unit (ICU). METHOD We retrospectively analyzed critically ill patients admitted to the ICU and subjected to HFNC or conventional oxygen therapy from January 2018 to June 2022 at the Suzhou Hospital of Integrated Traditional Chinese and Western Medicine. Blood gas analysis, a cough and sputum assessment, and cardiovascular function examinations were performed to evaluate the effect of HFNC oxygen therapy on patients. Also, the 28-d mortality rate, reintubation rate and incidence of respiratory failure were analyzed to evaluate whether HFNC oxygen therapy could improve patients' outcome. RESULTS In patients who received HFNC oxygen therapy, the partial pressure of oxygen and oxygenation index increased, and the respiratory rate decreased. HFNC oxygen therapy improved the patients' ability to cough up sputum and promoted the expulsion of sputum. In terms of cardiovascular function, patients who received HFNC oxygen therapy had a significant improvement in heart rate, but there was no real effect on patients' arterial pressure. There was no significant difference in the rates of reintubation (P = 0.202), 28-d mortality (P = 0.558) or respiratory failure (P = 0.677) between patients who received different oxygen therapies including HFNC oxygen therapy. CONCLUSION HFNC oxygen therapy improves the respiratory function of patients after extubation in their ICU and improves their coughing ability.
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Affiliation(s)
- Xiaoqi Chen
- Intensive Care Unit, Suzhou Hospital of Integrated Traditional Chinese and Western Medicine Suzhou 215101, Jiangsu, P. R. China
| | - Caiping Tan
- Department of Emergency, Suzhou Hospital of Integrated Traditional Chinese and Western Medicine Suzhou 215101, Jiangsu, P. R. China
| | - Huojun Jiang
- Intensive Care Unit, Suzhou Hospital of Integrated Traditional Chinese and Western Medicine Suzhou 215101, Jiangsu, P. R. China
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Melo-Diaz LL, Kieling GA. The ROX index: "Propelled" by high-flow nasal cannula therapy during the COVID-19 pandemic into greater applicability in respiratory support. CANADIAN JOURNAL OF RESPIRATORY THERAPY : CJRT = REVUE CANADIENNE DE LA THERAPIE RESPIRATOIRE : RCTR 2022; 58:182-184. [PMID: 36506639 PMCID: PMC9680963 DOI: 10.29390/cjrt-2022-012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Lucélia Luna Melo-Diaz
- Multiprofessional Unit, Hospital de Clínicas, Federal University of Paraná, Curitiba, Paraná, Brazil
| | - George Alvicio Kieling
- Multiprofessional Unit, Hospital de Clínicas, Federal University of Paraná, Curitiba, Paraná, Brazil
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Plotnikow GA, Villalba DS, Calvo EP, Quiroga C, Navarro E. Performance of Invasive Mode in Different Heated Humidification Systems With High-Flow Nasal Cannula. Respir Care 2022; 67:respcare.10170. [PMID: 35882470 PMCID: PMC9994028 DOI: 10.4187/respcare.10170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
BACKGROUND Oxygen therapy via high-flow nasal cannula generates physiologic changes that impact ventilatory variables of patients. However, we know that there are detrimental effects on airway mucosa related to inhalation of gases. The objective of this study was to evaluate the performance in terms of absolute humidity, relative humidity, and temperature of different brands of heated humidifiers and circuits in the invasive mode during the use of high-flow oxygen therapy in flows between 30 and 100 L/min. METHODS A prospective observational study conducted at the Sanatorio Anchorena equipment analysis laboratory; September 5 to October 20, 2019. RESULTS A statistically significant interaction was found among the programmed flows and the different combinations of devices and circuits for the delivery of absolute humidity (P < .001). An effect of flow on delivered absolute humidity was found, regardless of the equipment and circuit combination (P < .001). However, in the invasive mode, the combination of the Fisher&Paykel MR850 heated humidifier with the Medtronic-Dar circuit, the Intersurgical circuit, and the AquaVENT circuit always reached or achieved absolute humidity values > 33 mg/L, even at flows up to 100 L/min. The combination of the Flexicare FL9000 heated humidifier with the Fisher&Paykel RT202 circuit, the Fisher&Paykel Evaqua 2 circuit, the Flexicare circuit, the AquaVENT circuit, and the GGM circuit achieved similar results. The mean (SD) of absolute humidity delivered in the invasive mode (36.2 ± 5.9 mg/L) was higher compared with the noninvasive mode (26.8 ± 7.2 mg/L) (P < .001), regardless of circuit and programmed flows. CONCLUSIONS When heated humidifiers were used in the invasive mode for high-flow oxygen therapy, absolute humidity depended not only on the heated humidifiers and the combination of circuits but also on the programmed flow, especially at flows > 50 L/min. Moreover, the heated humidifiers exhibited different behaviors, in some cases inefficient, in delivering adequate humidification. However, some equipment improved performance when set to the invasive mode.
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Affiliation(s)
- Gustavo A Plotnikow
- Division of Physical Therapy and Respiratory Care, Rehabilitation Department, Intensive Care Unit, Hospital Británico de Buenos Aires, Buenos Aires, Argentina.
- Universidad Abierta Interamericana, Facultad de Medicina y Ciencias de la Salud, Buenos Aires, Argentina
| | - Dario S Villalba
- Division of Physical Therapy and Respiratory Care, Clínica Basilea, Buenos Aires, Argentina
| | - Eliana Pérez Calvo
- Division of Physical Therapy and Respiratory Care, Clínica Basilea, Buenos Aires, Argentina
- Division of Physical Therapy and Respiratory Care, Centro del Parque, Buenos Aires, Argentina
| | - Corina Quiroga
- Division of Physical Therapy and Respiratory Care, Intensive Care Unit, Sanatorio Anchorena Recoleta, Buenos Aires, Argentina
| | - Emiliano Navarro
- Division of Physical Therapy and Respiratory Care, Centro del Parque, Buenos Aires, Argentina
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Prediction of high-flow nasal cannula outcomes at the early phase using the modified respiratory rate oxygenation index. BMC Pulm Med 2022; 22:227. [PMID: 35698120 PMCID: PMC9189451 DOI: 10.1186/s12890-022-02017-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Accepted: 06/02/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND This study was designed to explore the early predictive value of the respiratory rate oxygenation (ROX) index modified by PaO2 (mROX) in high-flow nasal cannula (HFNC) therapy in patients with acute hypoxemia respiratory failure (AHRF). METHOD Seventy-five patients with AHRF treated with HFNC were retrospectively reviewed. Respiratory parameters at baseline and 2 h after HFNC initiation were analyzed. The predictive value of the ROX (ratio of pulse oximetry/FIO2 to respiratory rate) and mROX (ratio of arterial oxygen /FIO2 to respiratory rate) indices with two variations by adding heart rate to each index (ROX-HR and mROX-HR) was evaluated. RESULTS HFNC therapy failed in 24 patients, who had significantly higher intensive care unit (ICU) mortality and longer ICU stay. Both the ROX and mROX indices at 2 h after HFNC initiation can predict the risk of intubation after HFNC. Two hours after HFNC initiation, the mROX index had a higher area under the receiver operating characteristic curve (AUROC) for predicting HFNC success than the ROX index. Besides, baseline mROX index of greater than 7.1 showed a specificity of 100% for HFNC success. CONCLUSION The mROX index may be a suitable predictor of HFNC therapy outcomes at the early phase in patients with AHRF.
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Sampsonas F, Karamouzos V, Karampitsakos T, Papaioannou O, Katsaras M, Lagadinou M, Zarkadi E, Malakounidou E, Velissaris D, Stratakos G, Tzouvelekis A. High-Flow vs. Low-Flow Nasal Cannula in Reducing Hypoxemic Events During Bronchoscopic Procedures: A Systematic Review and Meta-Analysis. Front Med (Lausanne) 2022; 9:815799. [PMID: 35280891 PMCID: PMC8907665 DOI: 10.3389/fmed.2022.815799] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Accepted: 01/25/2022] [Indexed: 12/28/2022] Open
Abstract
Introduction High-flow nasal cannula (HFNC) oxygenation method has been proven to be successful in oxygenation of patients with respiratory failure and has exhibited clinical superiority compared to low-flow nasal cannula (LFNC). Methods We performed a systematic review and meta-analysis to evaluate the potential favorable impact of HFNC oxygenation during bronchoscopy and related procedures like endobronchial ultrasound-transbronchial needle aspiration. Only randomized control trials (RCTs) were included in the meta-analysis. Results Six randomized control trials with 1,170 patients were included in this meta-analysis. Patients who underwent bronchoscopy with the use of high-flow nasal cannula experienced less hypoxemic events/desaturations, less procedural interruptions and pneumothoraxes compared to patients under low-flow nasal cannula treatment. This beneficial effect of HFNC in hypoxemic events was persistent 10 min after the end of procedure. Conclusion The high-flow nasal cannula (HFNC) oxygenation method could reduce hypoxemic events and related peri- and post-bronchoscopic complications.
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Affiliation(s)
- Fotios Sampsonas
- Respiratory Medicine Department, University Hospital of Patras, Patras, Greece
| | | | | | - Ourania Papaioannou
- Respiratory Medicine Department, University Hospital of Patras, Patras, Greece
| | - Matthaios Katsaras
- Respiratory Medicine Department, University Hospital of Patras, Patras, Greece
| | - Maria Lagadinou
- Internal Medicine Department, University Hospital of Patras, Patras, Greece
| | - Eirini Zarkadi
- Respiratory Medicine Department, University Hospital of Patras, Patras, Greece
| | - Elli Malakounidou
- Respiratory Medicine Department, University Hospital of Patras, Patras, Greece
| | | | - Grigorios Stratakos
- Interventional Pulmonology Unit, First Respiratory Medicine Department of the National Kapodistrian University of Athens, Athens, Greece
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12
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Gattinoni L, Gattarello S, Steinberg I, Busana M, Palermo P, Lazzari S, Romitti F, Quintel M, Meissner K, Marini JJ, Chiumello D, Camporota L. COVID-19 pneumonia: pathophysiology and management. Eur Respir Rev 2021; 30:30/162/210138. [PMID: 34670808 PMCID: PMC8527244 DOI: 10.1183/16000617.0138-2021] [Citation(s) in RCA: 68] [Impact Index Per Article: 22.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Accepted: 08/08/2021] [Indexed: 12/23/2022] Open
Abstract
Coronavirus disease 2019 (COVID-19) pneumonia is an evolving disease. We will focus on the development of its pathophysiologic characteristics over time, and how these time-related changes determine modifications in treatment. In the emergency department: the peculiar characteristic is the coexistence, in a significant fraction of patients, of severe hypoxaemia, near-normal lung computed tomography imaging, lung gas volume and respiratory mechanics. Despite high respiratory drive, dyspnoea and respiratory rate are often normal. The underlying mechanism is primarily altered lung perfusion. The anatomical prerequisites for PEEP (positive end-expiratory pressure) to work (lung oedema, atelectasis, and therefore recruitability) are lacking. In the high-dependency unit: the disease starts to worsen either because of its natural evolution or additional patient self-inflicted lung injury (P-SILI). Oedema and atelectasis may develop, increasing recruitability. Noninvasive supports are indicated if they result in a reversal of hypoxaemia and a decreased inspiratory effort. Otherwise, mechanical ventilation should be considered to avert P-SILI. In the intensive care unit: the primary characteristic of the advance of unresolved COVID-19 disease is a progressive shift from oedema or atelectasis to less reversible structural lung alterations to lung fibrosis. These later characteristics are associated with notable impairment of respiratory mechanics, increased arterial carbon dioxide tension (PaCO2), decreased recruitability and lack of response to PEEP and prone positioning. COVID-19 pneumonia cannot be correctly described, analysed and treated if the time-factor is not taken into accounthttps://bit.ly/3AOKxc4
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Affiliation(s)
- Luciano Gattinoni
- Dept of Anesthesiology, University Medical Center Göttingen, Göttingen, Germany
| | - Simone Gattarello
- Dept of Anesthesiology, University Medical Center Göttingen, Göttingen, Germany
| | - Irene Steinberg
- Dept of Anesthesiology, University Medical Center Göttingen, Göttingen, Germany
| | - Mattia Busana
- Dept of Anesthesiology, University Medical Center Göttingen, Göttingen, Germany
| | - Paola Palermo
- Dept of Anesthesiology, University Medical Center Göttingen, Göttingen, Germany
| | - Stefano Lazzari
- Dept of Anesthesiology, University Medical Center Göttingen, Göttingen, Germany
| | - Federica Romitti
- Dept of Anesthesiology, University Medical Center Göttingen, Göttingen, Germany
| | - Michael Quintel
- Dept of Anesthesiology, University Medical Center Göttingen, Göttingen, Germany.,Dept of Anesthesiology, Intensive Care and Emergency Medicine Donau-Isar-Klinikum Deggendorf, Deggendorf, Germany
| | - Konrad Meissner
- Dept of Anesthesiology, University Medical Center Göttingen, Göttingen, Germany
| | - John J Marini
- Dept of Pulmonary and Critical Care Medicine, University of Minnesota and Regions Hospital, St. Paul, MN, USA
| | - Davide Chiumello
- Dept of Anesthesia and Intensive Care, San Paolo Hospital, University of Milan, Milan, Italy
| | - Luigi Camporota
- Dept of Adult Critical Care, Guy's and St Thomas' NHS Foundation Trust, Health Centre for Human and Applied Physiological Sciences, London, UK
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13
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Prevent deterioration and long-term ventilation: intensive care following thoracic surgery. Curr Opin Anaesthesiol 2021; 34:20-24. [PMID: 33315639 DOI: 10.1097/aco.0000000000000944] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
PURPOSE OF REVIEW Patients with indication for lung surgery besides the pulmonary pathology often suffer from independent comorbidities affecting several other organ systems. Preventing patients from harmful complications due to decompensation of underlying organ insufficiencies perioperatively is pivotal. This review draws attention to the peri- and postoperative responsibility of the anaesthetist and intensivist to prevent patients undergoing lung surgery deterioration. RECENT FINDINGS During the last decades we had to accept that 'traditional' intensive care medicine implying deep sedation, controlled ventilation, liberal fluid therapy, and broad-spectrum antimicrobial therapy because of several side-effects resulted in prolongation of hospital length of stay and a decline in quality of life. Modern therapy therefore should focus on the convalescence of the patient and earliest possible reintegration in the 'life-before.' Avoidance of sedative and anticholinergic drugs, early extubation, prophylactic noninvasive ventilation and high-flow nasal oxygen therapy, early mobilization, well-adjusted fluid balance and reasonable use of antibiotics are the keystones of success. SUMMARY A perioperative interprofessional approach and a change in paradigms are the prerequisites to improve outcome and provide treatment for elder and comorbid patients with an indication for thoracic surgery.
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14
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Yang PL, Yu JQ, Chen HB. High-flow nasal cannula for acute exacerbation of chronic obstructive pulmonary disease: A systematic review and meta-analysis. Heart Lung 2020; 50:252-261. [PMID: 33359930 DOI: 10.1016/j.hrtlng.2020.12.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Revised: 12/09/2020] [Accepted: 12/16/2020] [Indexed: 12/29/2022]
Abstract
BACKGROUND The evidence for the safety of high-flow nasal cannula (HFNC) in acute exacerbation of chronic obstructive pulmonary disease (AECOPD) patients is conflicting. OBJECTIVES To evaluate the intubation and mortality risks of HFNC compared to non-invasive ventilation (NIV) and conventional oxygen therapy (COT) for AECOPD patients. METHODS A search of electronic databases was performed. Studies that used HFNC to treat AECOPD patients were identified. RESULTS Seven RCTs and one observational study were included. There were no differences in intubation risk (risk ratio (RR) 0.94, 95% confidence interval (CI) 0.49 to 1.78, p = 0.84, very low certainty) and mortality risk (RR 0.91, 95% CI 0.46 to 1.79, p = 0.77, very low certainty) for HFNC compared with NIV. No data were available for intubation or mortality risk for HFNC compared with COT. CONCLUSION For AECOPD patients, low-quality evidence indicates that HFNC does not increase intubation and mortality risks compared to NIV.
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Affiliation(s)
- Peng-Lei Yang
- Graduate school of Dalian Medical University, Dalian, Liaoning province, China; Department of Critical Care Medicine, Northern Jiangsu People's Hospital, Yangzhou, Jiangsu Province, China.
| | - Jiang-Quan Yu
- Department of Critical Care Medicine, Northern Jiangsu People's Hospital, Yangzhou, Jiangsu Province, China; Clinical Medical College of Yangzhou University, Yangzhou, Jiangsu Province, China.
| | - Han-Bing Chen
- Graduate school of Dalian Medical University, Dalian, Liaoning province, China; Department of Critical Care Medicine, Northern Jiangsu People's Hospital, Yangzhou, Jiangsu Province, China.
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15
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Basile MC, Mauri T, Spinelli E, Dalla Corte F, Montanari G, Marongiu I, Spadaro S, Galazzi A, Grasselli G, Pesenti A. Nasal high flow higher than 60 L/min in patients with acute hypoxemic respiratory failure: a physiological study. CRITICAL CARE : THE OFFICIAL JOURNAL OF THE CRITICAL CARE FORUM 2020; 24:654. [PMID: 33225971 PMCID: PMC7682052 DOI: 10.1186/s13054-020-03344-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Accepted: 10/11/2020] [Indexed: 11/17/2022]
Abstract
Background Nasal high flow delivered at flow rates higher than 60 L/min in patients with acute hypoxemic respiratory failure might be associated with improved physiological effects. However, poor comfort might limit feasibility of its clinical use.
Methods We performed a prospective randomized cross-over physiological study on 12 ICU patients with acute hypoxemic respiratory failure. Patients underwent three steps at the following gas flow: 0.5 L/kg PBW/min, 1 L/kg PBW/min, and 1.5 L/kg PBW/min in random order for 20 min. Temperature and FiO2 remained unchanged. Toward the end of each phase, we collected arterial blood gases, lung volumes, and regional distribution of ventilation assessed by electrical impedance tomography (EIT), and comfort. Results In five patients, the etiology was pulmonary; infective disease characterized seven patients; median PaO2/FiO2 at enrollment was 213 [IQR 136–232]. The range of flow rate during NHF 1.5 was 75–120 L/min. PaO2/FiO2 increased with flow, albeit non significantly (p = 0.064), PaCO2 and arterial pH remained stable (p = 0.108 and p = 0.105). Respiratory rate decreased at higher flow rates (p = 0.014). Inhomogeneity of ventilation decreased significantly at higher flows (p = 0.004) and lung volume at end-expiration significantly increased (p = 0.007), but mostly in the non-dependent regions. Comfort was significantly poorer during the step performed at the highest flow (p < 0.001). Conclusions NHF delivered at rates higher than 60 L/min in critically ill patients with acute hypoxemic respiratory failure is associated with reduced respiratory rate, increased lung homogeneity, and additional positive pressure effect, but also with worse comfort.
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Affiliation(s)
- Maria Cristina Basile
- Department of Anesthesia, Critical Care and Emergency, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Tommaso Mauri
- Department of Anesthesia, Critical Care and Emergency, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy. .,Department of Pathophysiology and Transplantation, University of Milan, Via F. Sforza 35, 20122, Milan, Italy.
| | - Elena Spinelli
- Department of Anesthesia, Critical Care and Emergency, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Francesca Dalla Corte
- Intensive Care Unit, Department of Morphology, Surgery and Experimental Medicine, Sant'Anna University Hospital, Ferrara, Italy
| | - Giacomo Montanari
- Intensive Care Unit, Department of Morphology, Surgery and Experimental Medicine, Sant'Anna University Hospital, Ferrara, Italy
| | - Ines Marongiu
- Department of Pathophysiology and Transplantation, University of Milan, Via F. Sforza 35, 20122, Milan, Italy
| | - Savino Spadaro
- Intensive Care Unit, Department of Morphology, Surgery and Experimental Medicine, Sant'Anna University Hospital, Ferrara, Italy
| | - Alessandro Galazzi
- Direction of Healthcare Professions, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Giacomo Grasselli
- Department of Anesthesia, Critical Care and Emergency, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy.,Department of Pathophysiology and Transplantation, University of Milan, Via F. Sforza 35, 20122, Milan, Italy
| | - Antonio Pesenti
- Department of Anesthesia, Critical Care and Emergency, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy.,Department of Pathophysiology and Transplantation, University of Milan, Via F. Sforza 35, 20122, Milan, Italy
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16
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Calligaro GL, Lalla U, Audley G, Gina P, Miller MG, Mendelson M, Dlamini S, Wasserman S, Meintjes G, Peter J, Levin D, Dave JA, Ntusi N, Meier S, Little F, Moodley DL, Louw EH, Nortje A, Parker A, Taljaard JJ, Allwood BW, Dheda K, Koegelenberg CFN. The utility of high-flow nasal oxygen for severe COVID-19 pneumonia in a resource-constrained setting: A multi-centre prospective observational study. EClinicalMedicine 2020; 28:100570. [PMID: 33043285 PMCID: PMC7536126 DOI: 10.1016/j.eclinm.2020.100570] [Citation(s) in RCA: 119] [Impact Index Per Article: 29.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Revised: 09/11/2020] [Accepted: 09/14/2020] [Indexed: 01/15/2023] Open
Abstract
BACKGROUND The utility of heated and humidified high-flow nasal oxygen (HFNO) for severe COVID-19-related hypoxaemic respiratory failure (HRF), particularly in settings with limited access to intensive care unit (ICU) resources, remains unclear, and predictors of outcome have been poorly studied. METHODS We included consecutive patients with COVID-19-related HRF treated with HFNO at two tertiary hospitals in Cape Town, South Africa. The primary outcome was the proportion of patients who were successfully weaned from HFNO, whilst failure comprised intubation or death on HFNO. FINDINGS The median (IQR) arterial oxygen partial pressure to fraction inspired oxygen ratio (PaO2/FiO2) was 68 (54-92) in 293 enroled patients. Of these, 137/293 (47%) of patients [PaO2/FiO2 76 (63-93)] were successfully weaned from HFNO. The median duration of HFNO was 6 (3-9) in those successfully treated versus 2 (1-5) days in those who failed (p<0.001). A higher ratio of oxygen saturation/FiO2 to respiratory rate within 6 h (ROX-6 score) after HFNO commencement was associated with HFNO success (ROX-6; AHR 0.43, 0.31-0.60), as was use of steroids (AHR 0.35, 95%CI 0.19-0.64). A ROX-6 score of ≥3.7 was 80% predictive of successful weaning whilst ROX-6 ≤ 2.2 was 74% predictive of failure. In total, 139 patents (52%) survived to hospital discharge, whilst mortality amongst HFNO failures with outcomes was 129/140 (92%). INTERPRETATION In a resource-constrained setting, HFNO for severe COVID-19 HRF is feasible and more almost half of those who receive it can be successfully weaned without the need for mechanical ventilation.
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Affiliation(s)
- Gregory L Calligaro
- Centre for Lung Infection and Immunity, Division of Pulmonology, Department of Medicine and UCT Lung Institute and South African MRC/UCT Centre for the Study of Antimicrobial Resistance, University of Cape Town, Cape Town, South Africa
- Division of Critical Care, Department of Anaesthesia and Perioperative Medicine, University of Cape Town and Groote Schuur Hospital, Cape Town, South Africa
| | - Usha Lalla
- Division of Pulmonology, Department of Medicine, Stellenbosch University and Tygerberg Hospital, Cape Town, South Africa
| | - Gordon Audley
- Division of General Medicine, Department of Medicine, University of Cape Town and Groote Schuur Hospital, Cape Town, South Africa
| | - Phindile Gina
- Centre for Lung Infection and Immunity, Division of Pulmonology, Department of Medicine and UCT Lung Institute and South African MRC/UCT Centre for the Study of Antimicrobial Resistance, University of Cape Town, Cape Town, South Africa
| | - Malcolm G Miller
- Division of Critical Care, Department of Anaesthesia and Perioperative Medicine, University of Cape Town and Groote Schuur Hospital, Cape Town, South Africa
| | - Marc Mendelson
- Division of Infectious Diseases and HIV Medicine, Department of Medicine, University of Cape Town and Groote Schuur Hospital, Cape Town, South Africa
| | - Sipho Dlamini
- Division of Infectious Diseases and HIV Medicine, Department of Medicine, University of Cape Town and Groote Schuur Hospital, Cape Town, South Africa
| | - Sean Wasserman
- Division of Infectious Diseases and HIV Medicine, Department of Medicine, University of Cape Town and Groote Schuur Hospital, Cape Town, South Africa
- Wellcome Centre for Infectious Disease Research in Africa (CIDRI-Africa), Institute of Infectious Disease and Molecular Medicine, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
| | - Graeme Meintjes
- Wellcome Centre for Infectious Disease Research in Africa (CIDRI-Africa), Institute of Infectious Disease and Molecular Medicine, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
- Department of Medicine, University of Cape Town and Groote Schuur Hospital, Cape Town, South Africa
| | - Jonathan Peter
- Division of Clinical Immunology and Allergology, Department of Medicine, University of Cape Town and Groote Schuur Hospital, Cape Town, South Africa
| | - Dion Levin
- Division of Gastroenterology, Department of Medicine, University of Cape Town and Groote Schuur Hospital, Cape Town, South Africa
| | - Joel A Dave
- Division of Endocrinology, Department of Medicine, University of Cape Town and Groote Schuur Hospital, Cape Town, South Africa
| | - Ntobeko Ntusi
- Department of Medicine, University of Cape Town and Groote Schuur Hospital, Cape Town, South Africa
| | - Stuart Meier
- Centre for Lung Infection and Immunity, Division of Pulmonology, Department of Medicine and UCT Lung Institute and South African MRC/UCT Centre for the Study of Antimicrobial Resistance, University of Cape Town, Cape Town, South Africa
| | - Francesca Little
- Department of Statistical Sciences, University of Cape Town, Cape Town, South Africa
| | - Desiree L Moodley
- Division of Pulmonology, Department of Medicine, Stellenbosch University and Tygerberg Hospital, Cape Town, South Africa
| | - Elizabeth H Louw
- Division of Pulmonology, Department of Medicine, Stellenbosch University and Tygerberg Hospital, Cape Town, South Africa
| | - Andre Nortje
- Division of Pulmonology, Department of Medicine, Stellenbosch University and Tygerberg Hospital, Cape Town, South Africa
| | - Arifa Parker
- Division of Infectious Diseases, Department of Medicine, Stellenbosch University and Tygerberg Hospital, Cape Town, South Africa
| | - Jantjie J Taljaard
- Division of Infectious Diseases, Department of Medicine, Stellenbosch University and Tygerberg Hospital, Cape Town, South Africa
| | - Brian W Allwood
- Division of Pulmonology, Department of Medicine, Stellenbosch University and Tygerberg Hospital, Cape Town, South Africa
| | - Keertan Dheda
- Centre for Lung Infection and Immunity, Division of Pulmonology, Department of Medicine and UCT Lung Institute and South African MRC/UCT Centre for the Study of Antimicrobial Resistance, University of Cape Town, Cape Town, South Africa
- Division of Critical Care, Department of Anaesthesia and Perioperative Medicine, University of Cape Town and Groote Schuur Hospital, Cape Town, South Africa
- Faculty of Infectious and Tropical Diseases, Department of Infection Biology, London School of Hygiene and Tropical Medicine, London, UK
| | - Coenraad F N Koegelenberg
- Division of Pulmonology, Department of Medicine, Stellenbosch University and Tygerberg Hospital, Cape Town, South Africa
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17
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Spinelli E, Mauri T, Beitler JR, Pesenti A, Brodie D. Respiratory drive in the acute respiratory distress syndrome: pathophysiology, monitoring, and therapeutic interventions. Intensive Care Med 2020; 46:606-618. [PMID: 32016537 PMCID: PMC7224136 DOI: 10.1007/s00134-020-05942-6] [Citation(s) in RCA: 131] [Impact Index Per Article: 32.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2019] [Accepted: 01/16/2020] [Indexed: 12/18/2022]
Abstract
Neural respiratory drive, i.e., the activity of respiratory centres controlling breathing, is an overlooked physiologic variable which affects the pathophysiology and the clinical outcome of acute respiratory distress syndrome (ARDS). Spontaneous breathing may offer multiple physiologic benefits in these patients, including decreased need for sedation, preserved diaphragm activity and improved cardiovascular function. However, excessive effort to breathe due to high respiratory drive may lead to patient self-inflicted lung injury (P-SILI), even in the absence of mechanical ventilation. In the present review, we focus on the physiological and clinical implications of control of respiratory drive in ARDS patients. We summarize the main determinants of neural respiratory drive and the mechanisms involved in its potentiation, in health and ARDS. We also describe potential and pitfalls of the available bedside methods for drive assessment and explore classical and more “futuristic” interventions to control drive in ARDS patients.
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Affiliation(s)
- Elena Spinelli
- Dipartimento di Anestesia, Rianimazione ed Emergenza-Urgenza, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Università Degli Studi Di Milano, Via F. Sforza 35, 20122, Milan, Italy
| | - Tommaso Mauri
- Dipartimento di Anestesia, Rianimazione ed Emergenza-Urgenza, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Università Degli Studi Di Milano, Via F. Sforza 35, 20122, Milan, Italy. .,Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy.
| | - Jeremy R Beitler
- Center for Acute Respiratory Failure, Division of Pulmonary, Allergy, and Critical Care Medicine, Columbia University College of Physicians and Surgeons/New York-Presbyterian Hospital, New York, NY, USA
| | - Antonio Pesenti
- Dipartimento di Anestesia, Rianimazione ed Emergenza-Urgenza, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Università Degli Studi Di Milano, Via F. Sforza 35, 20122, Milan, Italy.,Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy
| | - Daniel Brodie
- Center for Acute Respiratory Failure, Division of Pulmonary, Allergy, and Critical Care Medicine, Columbia University College of Physicians and Surgeons/New York-Presbyterian Hospital, New York, NY, USA
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18
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Spinelli E, Roca O, Mauri T. Dynamic assessment of the ROX index during nasal high flow for early identification of non-responders. J Crit Care 2019; 58:130-131. [PMID: 31635957 DOI: 10.1016/j.jcrc.2019.08.013] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2019] [Accepted: 08/05/2019] [Indexed: 10/25/2022]
Affiliation(s)
- Elena Spinelli
- Department of Anesthesia, Critical Care and Emergency, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Oriol Roca
- Critical Care Department, Vall d'Hebron University Hospital, Vall d'Hebron Research Institute, Barcelona, Spain; Ciber Enfermedades Respiratorias (CIBERES), Instituto de Salud Carlos III, Madrid, Spain
| | - Tommaso Mauri
- Department of Anesthesia, Critical Care and Emergency, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy; Department of Pathophysiology and Transplantation, University of Milan, Italy.
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