Acute and Critical Care

Original Articles

Pediatrics
High-flow nasal cannula for respiratory support in children with severe asthma attack: a systematic review and meta-analysis: Ghea Mangkuliguna, Muhammad Ifan Romli, Adrian Djatikusumo, Nicholas Adrianto; Acute Crit Care. 2026;41(1):148-159. Published online October 24, 2025; DOI: https://doi.org/10.4266/acc.003744

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Abstract PDF: Background
Adjunctive therapies, including high-flow nasal cannula (HFNC) and bilevel positive airway pressure, have been explored to manage severe asthma attacks and avoid invasive ventilation. HFNC has gained interest as a potential alternative. This review evaluated and compared outcomes of HFNC with conventional oxygen therapy or other non-invasive ventilation (NIV) in severe asthma. Methods: A comprehensive search of PubMed/Medline, Scopus, Cochrane Library, and gray literature identified studies published between August 25, 2014, and August 25, 2024. A random-effects meta-analysis was performed, and results were presented in a forest plot. Study quality was assessed using the Cochrane Risk of Bias tool (ROB-2) and Newcastle-Ottawa Scale. The review followed Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) 2020 guidelines and was registered in PROSPERO (CRD42024558656). Results: Nine studies with 14,606 subjects were included. HFNC showed a trend toward improved pulmonary scores, though not statistically significant (P>0.05). Pediatric intensive care unit (PICU) admission and need for escalation of support did not significantly differ from standard oxygen therapy or other NIV. HFNC was associated with a modest but significant increase in readmission (odds ratio, 3.14; 95% CI, 1.07–9.24; P=0.04). PICU length of stay was comparable across groups, and mortality among HFNC-treated patients remained <1%. Overall evidence quality was very low to low. Conclusions: HFNC did not demonstrate superior outcomes over conventional oxygen therapy and other NIV. Evidence remains limited and of low quality, highlighting the need for further high-quality studies.

Pulmonary
Comparison of preoxygenation with a high-flow nasal cannula and a simple face mask before intubation in Korean patients with head and neck cancer: Jun-Young Jo, Jungpil Yoon, Heeyoon Jang, Wook-Jong Kim, Seungwoo Ku, Seong-Soo Choi; Acute Crit Care. 2024;39(1):61-69. Published online January 26, 2024; DOI: https://doi.org/10.4266/acc.2022.01543

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Background
Although preoxygenation is an essential procedure for safe endotracheal intubation, in some cases securing sufficient time for tracheal intubation may not be possible. Patients with head and neck cancer might have a difficult airway and need a longer time for endotracheal intubation. We hypothesized that the extended apneic period with preoxygenation via a high-flow nasal cannula (HFNC) is beneficial to patients who undergo head and neck surgery compared with preoxygenation with a simple mask.
Methods
The study was conducted as a single-center, single-blinded, prospective, randomized controlled trial. Patients were divided into groups based on one of the two preoxygenation methods: HFNC group or simple facemask (mask group). Preoxygenation was performed for 5 minutes with each method, and endotracheal intubation for all patients was performed using a video laryngoscope. Oxygen partial pressures of the arterial blood were compared at the predefined time points.
Results
For the primary outcome, the mean arterial oxygen partial pressure (PaO2 ) immediately after intubation was 454.2 mm Hg (95% confidence interval [CI], 416.9–491.5 mm Hg) in the HFNC group and 370.7 mm Hg (95% CI, 333.7–407.4 mm Hg) in the mask group (P=0.002). The peak PaO2 at 5 minutes after preoxygenation was not statistically different between the groups (P=0.355).
Conclusions
Preoxygenation with a HFNC extending to the apneic period before endotracheal intubation may be beneficial in patients with head and neck cancer.

Citations

Citations to this article as recorded by

High-flow nasal oxygen versus face-mask ventilation for rapid sequence induction in non-elective surgical patients: a randomized controlled trial
Nguyen Duc Lam, Le Dinh Thanh Son, Tran Minh Phat, Nguyen Dang Thu, Nguyen Thuy Nga, Vuong Trung Son, Bui Minh Hong
BMC Anesthesiology.2026;[Epub] CrossRef
High-Flow Nasal Cannula Oxygen Therapy in Perioperative Respiratory Care: Application and Prospects
Jing Chen, Xinyue Hu, Dong Han, Yuwei Liu, Danqi Chen, Shuangyun Chen, Yuwei Chen, Jing Wu
Journal of Multidisciplinary Healthcare.2026; Volume 19: 1. CrossRef
Guidelines 2024: Emergency intubation of an adult outside the operating room and intensive care unit
Thomas Clavier, Eric Cesareo, Denis Frasca, Frédéric Adnet, Marie-Pierre Bonnet, Nathalie Bruneau, Xavier Combes, Julie Contenti, Anne-Laure Feral-Pierssens, Michel Galinski, Jérémy Guenezan, Cédric Gil-Jardine, Alice Hutin, Samir Jaber, Déborah Jaeger, F
Anaesthesia Critical Care & Pain Medicine.2026; 45(3): 101744. CrossRef
Application Progress of Nasal High-Flow Oxygen Therapy in Clinical Anesthesia
雨张
Advances in Clinical Medicine.2026; 16(04): 76. CrossRef
Place de l’oxygénation haut débit dans la gestion des voies aériennes au bloc opératoire
Antoine Duwat, Romain Deransy
Anesthésie & Réanimation.2025; 11(5-6): 393. CrossRef

Pulmonary
Combining reservoir mask oxygenation with high-flow nasal cannula in the treatment of hypoxemic respiratory failure among patients with COVID-19 pneumonia: a retrospective cohort study: Ivan Gur, Ronen Zalts, Yaniv Dotan, Khitam Hussain, Ami Neuberger, Eyal Fuchs; Acute Crit Care. 2023;38(4):435-441. Published online November 23, 2023; DOI: https://doi.org/10.4266/acc.2023.00451

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Abstract PDF Supplementary Material: Background
Concerns regarding positive-pressure-ventilation for the treatment of coronavirus disease 2019 (COVID-19) hypoxemia led the search for alternative oxygenation techniques. This study aimed to assess one such method, dual oxygenation, i.e., the addition of a reservoir mask (RM) on top of a high-flow nasal cannula (HFNC).
Methods
In this retrospective cohort study, the records of all patients hospitalized with COVID-19 during 2020–2022 were reviewed. Patients over the age of 18 years with hypoxemia necessitating HFNC were included. Exclusion criteria were positive-pressure-ventilation for any indication other than hypoxemic respiratory failure, transfer to another facility while still on HFNC and “do-not-intubate/resuscitate” orders. The primary outcome was mortality within 30 days from the first application of HFNC. Secondary outcomes were intubation and admission to the intensive care unit.
Results
Of 659 patients included in the final analysis, 316 were treated with dual oxygenation and 343 with HFNC alone. Propensity for treatment was estimated based on background diagnoses, laboratories and vital signs upon admission, gender and glucocorticoid dose. Inverse probability of treatment weighted regression including age, body mass index, Sequential Organ Failure Assessment (SOFA) score and respiratory rate oxygenation index showed treatment with dual oxygenation to be associated with lower 30-day mortality (adjusted hazard ratio, 0.615; 95% confidence interval, 0.469–0.809). Differences in the secondary outcomes did not reach statistical significance.
Conclusions
Our study suggests that the addition of RM on top of HFNC may be associated with decreased mortality in patients with severe COVID-19 hypoxemia.

Pulmonary
Comparison of high-flow nasal oxygen therapy and noninvasive ventilation in COVID-19 patients: a systematic review and meta-analysis: Glenardi Glenardi, Febie Chriestya, Bambang J Oetoro, Ghea Mangkuliguna, Natalia Natalia; Acute Crit Care. 2022;37(1):71-83. Published online February 22, 2022; DOI: https://doi.org/10.4266/acc.2021.01326

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Abstract PDF Supplementary Material

Background
Acute respiratory failure (ARF) is a major adverse event commonly encountered in severe coronavirus disease 2019 (COVID-19). Although noninvasive mechanical ventilation (NIV) has long been used in the management of ARF, it has several adverse events which may cause patient discomfort and lead to treatment complication. Recently, high-flow nasal cannula (HFNC) has the potential to be an alternative for NIV in adults with ARF, including COVID-19 patients. The objective was to investigate the efficacy of HFNC compared to NIV in COVID-19 patients.
Methods
This meta-analysis was reported following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) criteria. Literature search was carried out in electronic databases for relevant articles published prior to June 2021. The protocol used in this study has been registered in International Prospective Register of Systematic Reviews (CRD42020225186).
Results
Although the success rate of NIV is higher compared to HFNC (odds ratio [OR], 0.39; 95% confidence interval [CI], 0.16–0.97; P=0.04), this study showed that the mortality in the NIV group is also significantly higher compared to HFNC group (OR, 0.49; 95% CI, 0.39–0.63; P<0.001). Moreover, this study also demonstrated that there was no significant difference in intubation rates between the two groups (OR, 1.35; 95% CI, 0.86–2.11; P=0.19).
Conclusions
Patients treated with HFNC showed better outcomes compared to NIV for ARF due to COVID-19. Therefore, HFNC should be considered prior to NIV in COVID-19–associated ARF. However, further studies with larger sample sizes are still needed to better elucidate the benefit of HFNC in COVID-19 patients.

Citations

Citations to this article as recorded by

Trends and management of acute respiratory failure in hospitalized patients: a multicenter retrospective study in South Korea
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2023 Year in Review: High-Flow Nasal Cannula for COVID-19
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High-flow nasal cannula therapy in patients with COVID-19 in intensive care units in a country with limited resources: a single-center experience
Anh-Minh Vu Phan, Hai-Yen Thi Hoang, Thanh-Son Truong Do, Trung Quoc Hoang, Thuan Van Phan, Nguyet-Anh Phuong Huynh, Khoi Minh Le
Journal of International Medical Research.2023;[Epub] CrossRef
Evaluating the use of the respiratory-rate oxygenation index as a predictor of high-flow nasal cannula oxygen failure in COVID-19
Scott Weerasuriya, Savvas Vlachos, Ahmed Bobo, Namitha Birur Jayaprabhu, Lauren Matthews, Adam R Blackstock, Victoria Metaxa
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Erkan Yildirim, Levent Kilickan, Suleyman Hilmi Aksoy, Ramazan Gozukucuk, Hasan Huseyin Kilic, Yakup Tomak, Orhan Dalkilic, Ibrahim Halil Tanboga, Fevzi Duhan Berkan Kilickan
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Yorschua Jalil, Martina Ferioli, Martin Dres
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Tropical Medicine and Health.2023;[Epub] CrossRef
Mechanical ventilation and outcomes in COVID-19 patients admitted to intensive care unit in a low-resources setting: A retrospective study
Sarakawabalo Assenouwe, Tabana Essohanam Mouzou, Ernest Ahounou, Lidaw Déassoua Bawe, Awèréou Kotosso, Koffi Atsu Aziagbe, Eyram Makafui Yoan Amekoudi, Mamoudou Omourou, Chimene Etonga Anoudem, Komi Séraphin Adjoh
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Comparison between high-flow nasal cannula and noninvasive ventilation in COVID-19 patients: a systematic review and meta-analysis
Yun Peng, Bing Dai, Hong-wen Zhao, Wei Wang, Jian Kang, Hai-jia Hou, Wei Tan
Therapeutic Advances in Respiratory Disease.2022;[Epub] CrossRef
Does High Flow Nasal Cannula avoid intubation and improve the mortality of adult patients in acute respiratory failure in the intensive care setting, when compared to others methods as Conventional Oxygen Therapy or Non-Invasive Ventilation? A narrative r
P Fosseur, A Renard, P Mateu, J Rosman
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Review Article

Pulmonary
High-flow nasal cannula for respiratory failure in adult patients: SeungYong Park; Acute Crit Care. 2021;36(4):275-285. Published online November 30, 2021; DOI: https://doi.org/10.4266/acc.2021.01571

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Abstract PDF

The high-flow nasal cannula (HFNC) has been recently used in several clinical settings for oxygenation in adults. In particular, the advantages of HFNC compared with low-flow oxygen systems or non-invasive ventilation include enhanced comfort, increased humidification of secretions to facilitate expectoration, washout of nasopharyngeal dead space to improve the efficiency of ventilation, provision of a small positive end-inspiratory pressure effect, and fixed and rapid delivery of an accurate fraction of inspired oxygen (FiO2) by minimizing the entrainment of room air. HFNC has been successfully used in critically ill patients with several conditions, such as hypoxemic respiratory failure, hypercapneic respiratory failure (exacerbation of chronic obstructive lung disease), post-extubation respiratory failure, pre-intubation oxygenation, and others. However, the indications are not absolute, and much of the proven benefit remains subjective and physiologic. This review discusses the practical application and clinical uses of HFNC in adults, including its unique respiratory physiologic effects, device settings, and clinical indications.

Citations

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Adherence and influencing factors of high-flow nasal cannula humidified oxygen therapy in elderly patients with stable chronic obstructive pulmonary disease: A meta-analysis
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Rania G Elsayed, Amr F Hafez, Mohammed M Maarouf, Farouk KE AbdElAziz
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Original Articles

Pulmonary
Effects of high-flow nasal cannula in patients with mild to moderate hypercapnia: a prospective observational study: Kyung Hun Nam, Hyung Koo Kang, Sung-Soon Lee, So-Hee Park, Sung Wook Kang, Jea Jun Hwang, So Young Park, Won Young Kim, Hee Jung Suh, Eun Young Kim, Ga Jin Seo, Younsuck Koh, Sang-Bum Hong, Jin Won Huh, Chae-Man Lim; Acute Crit Care. 2021;36(3):249-255. Published online July 26, 2021; DOI: https://doi.org/10.4266/acc.2020.01102

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316 Download
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Abstract PDF

Background
Evidence for using high-flow nasal cannula (HFNC) in hypercapnia is still limited. Most of the clinical studies had been conducted retrospectively, and there had been conflicting reports for the effects of HFNC on hypercapnia correction in prospective studies. Therefore, more evidence is needed to understand the effect of the HFNC in hypercapnia.
Methods
We conducted a multicenter prospective observational study after applying HFNC to 45 hospitalized subjects who had moderate hypercapnia (arterial partial pressure of carbon dioxide [PaCO2], 43–70 mm Hg) without severe respiratory acidosis (pH <7.30). The primary outcome was a change in PaCO2 level in the first 24 hours of HFNC use. The secondary outcomes were changes in other parameters of arterial blood gas analysis, changes in respiration rates, and clinical outcomes.
Results
There was a significant decrease in PaCO2 in the first hour of HFNC application (-3.80 mm Hg; 95% confidence interval, -6.35 to -1.24; P<0.001). Reduction of PaCO2 was more prominent in subjects who did not have underlying obstructive lung disease. There was a correction in pH, but no significant changes in respiratory rate, bicarbonate, and arterial partial pressure of oxygen/fraction of inspired oxygen ratio. Mechanical ventilation was not required for 93.3% (42/45) of our study population.
Conclusions
We suggest that HFNC could be a safe alternative for oxygen delivery in hypercapnia patients who do not need immediate mechanical ventilation. With HFNC oxygenation, correction of hypercapnia could be expected, especially in patients who do not have obstructive lung diseases.

Citations

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Yong Jun Choi, Jae Hwa Cho
Journal of the Korean Medical Association.2022; 65(3): 124. CrossRef
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The Application Progress of HFNC in Respiratory Diseases
迪吴
Advances in Clinical Medicine.2022; 12(11): 10617. CrossRef

Pulmonary
Protecting Postextubation Respiratory Failure and Reintubation by High-Flow Nasal Cannula Compared to Low-Flow Oxygen System: Single Center Retrospective Study and Literature Review: Minhyeok Lee, Ji Hye Kim, In Beom Jeong, Ji Woong Son, Moon Jun Na, Sun Jung Kwon; Acute Crit Care. 2019;34(1):60-70. Published online February 28, 2019; DOI: https://doi.org/10.4266/acc.2018.00311

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Background
Use of a high-flow nasal cannula (HFNC) reduced postextubation respiratory failure (PERF) and reintubation rate compared to use of a low-flow oxygen system (LFOS) in low-risk patients. However, no obvious conclusion was reached for high-risk patients. Here, we sought to present the current status of HFNC use as adjunctive oxygen therapy in a clinical setting and to elucidate the nature of the protective effect following extubation.
Methods
The medical records of 855 patients who were admitted to the intensive care unit of single university hospital during a period of 5.5 years were analyzed retrospectively, with only 118 patients ultimately included in the present research. The baseline characteristics of these patients and the occurrence of PERF and reintubation along with physiologic changes were analyzed.
Results
Eighty-four patients underwent HFNC, and the remaining 34 patients underwent conventional LFOS after extubation. Physicians preferred HFNC to LFOS in the face of highrisk features including old age, neurologic disease, moderate to severe chronic obstructive pulmonary disease, a long duration of mechanical ventilation, low baseline arterial partial pressure of oxygen to fraction of inspired oxygen ratio, and a high baseline alveolar–arterial oxygen difference. The reintubation rate at 72 hours after extubation was not different (9.5% vs. 8.8%; P=1.000). Hypoxic respiratory failure was slightly higher in the nonreintubation group than in the reintubation group (31.9% vs. 6.7%; P=0.058). Regarding physiologic effects, heart rate was only stabilized after 24 hours of extubation in the HFNC group.
Conclusions
No difference was found in the occurrence of PERF and reintubation between both groups. It is worth noting that similar PERF and reintubation ratios were shown in the HFNC group in those with certain exacerbating risk factors versus not. Caution is needed regarding delayed reintubation in the HFNC group.

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