Acute and Critical Care

Original Articles

Pulmonary
Awake prone positioning for COVID-19 acute hypoxemic respiratory failure in Tunisia: Khaoula Ben Ismail, Fatma Essafi, Imen Talik, Najla Ben Slimene, Ines Sdiri, Boudour Ben Dhia, Takoua Merhbene; Acute Crit Care. 2023;38(3):271-277. Published online August 21, 2023; DOI: https://doi.org/10.4266/acc.2023.00591

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Abstract PDF: Background
In this study, we explored whether awake prone position (PP) can impact prognosis of severe hypoxemia coronavirus disease 2019 (COVID-19) patients.
Methods
This was a prospective observational study of severe, critically ill adult COVID-19 patients admitted to the intensive care unit. Patients were divided into two groups: group G1, patients who benefited from a vigilant and effective PP (>4 hours minimum/24) and group G2, control group. We compared demographic, clinical, paraclinical and evolutionary data.
Results
Three hundred forty-nine patients were hospitalized during the study period, 273 met the inclusion criteria. PP was performed in 192 patients (70.3%). The two groups were comparable in terms of demographic characteristics, clinical severity and modalities of oxygenation at intensive care unit (ICU) admission. The mean PaO2/ FIO2 ratios were 141 and 128 mm Hg, respectively (P=0.07). The computed tomography scan was comparable with a critical >75% in 48.5% (G1) versus 54.2% (G2). The median duration of the daily PP session was 13±7 hours per day. The average duration of spontaneous PP days was 7 days (4–19). Use of invasive ventilation was lower in the G1 group (27% vs. 56%, P=0.002). Healthcare-associated infections were significantly lower in G1 (42.1% vs. 82%, P=0.01). Duration of total mechanical ventilation and length of ICU stay were comparable between the two groups. Mortality was significantly higher in G2 (64% vs. 28%, P=0.02).
Conclusions
Our study confirmed that awake PP can improve prognosis in COVID-19 patients. Randomized controlled trials are needed to confirm this result.

Pulmonary
Extravascular lung water index, pulmonary vascular permeability index, and global end-diastolic volume index in mechanically ventilated COVID-19 patients requiring prone position ventilation: a preliminary retrospective study: Rosanna Carmela De Rosa, Antonio Romanelli, Michele Gallifuoco, Giovanni Messina, Marianne Di Costanzo, Antonio Corcione; Acute Crit Care. 2022;37(4):571-579. Published online November 10, 2022; DOI: https://doi.org/10.4266/acc.2022.00423

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Background
There is a lack of data on extravascular lung water index (EVLWi), pulmonary vascular permeability index (PVPi), and global end-diastolic volume index (GEDVi) during prone position ventilation (PPV) in coronavirus disease 2019 (COVID-19) patients. The objectives of this study were to analyze trends in EVLWi, PVPi, and GEDVi during PPV and the relationships between these parameters and PaO2/FiO2. Methods: In this preliminary retrospective observational study, we performed transpulmonary thermodilution (TPTD) in seven mechanically ventilated COVID-19 patients without cardiac and pulmonary comorbidities requiring PPV for 18 hours, at specific times (30 minutes pre-PPV, 18 hours after PPV, and 3 hours after supination). EVLWi, PVPi and GEDVi were measured. The relationships between PaO2/FiO2 and EVLWi, and PVPi and GEDVi values, in the supine position were analyzed by linear regression. Correlation and determination coefficients were calculated. Results: EVLWi was significantly different between three time points (analysis of variance, P=0.004). After 18 hours in PPV, EVLWi was lower compared with values before PPV (12.7±0.9 ml/kg vs. 15.3±1.5 ml/kg, P=0.002). Linear regression showed that only EVLWi was correlated with PaO2/FiO2 (β =–5.757; 95% confidence interval, –10.835 to –0.679; r=–0.58; R2 =0.34; F-test P=0.029). Conclusions: EVLWi was significantly reduced after 18 hours in PPV and values measured in supine positions were correlated with PaO2/FiO2. This relationship can help clinicians discriminate whether deterioration in gas exchange is related to fluid overload or disease progression. Further clinical research should evaluate the role of TPTD parameters as markers to stratify disease severity and guide clinical management.

Citations

Citations to this article as recorded by

Determining Extracellular Water Effects in Mild and Severe COVID-19 Pneumonia Clinical Course by using the Bioimpedance Method
Zuhal Cavus, Ayse Vahaboglu, Ulku Aygen Turkmen, Habibe Vural, Dondu Genc Moralar
Medical Bulletin of Haseki.2023; 61(2): 81. CrossRef

Pulmonary
Effect of prone positioning on gas exchange according to lung morphology in patients with acute respiratory distress syndrome: Na Young Kim, Si Mong Yoon, Jimyung Park, Jinwoo Lee, Sang-Min Lee, Hong Yeul Lee; Acute Crit Care. 2022;37(3):322-331. Published online July 29, 2022; DOI: https://doi.org/10.4266/acc.2022.00367

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Abstract PDF Supplementary Material

Background
There are limited data on the clinical effects of prone positioning according to lung morphology. We aimed to determine whether the gas exchange response to prone positioning differs according to lung morphology.
Methods
This retrospective study included adult patients with moderate-to-severe acute respiratory distress syndrome (ARDS). The lung morphology of ARDS was assessed by chest computed tomography scan and classified as “diffuse” or “focal.” The primary outcome was change in partial pressure of arterial oxygen to fraction of inspired oxygen (PaO2/FiO2) ratio after the first prone positioning session: first, using the entire cohort, and second, using subgroups of patients with diffuse ARDS matched 2 to 1 with patients with focal ARDS at baseline.
Results
Ninety-five patients were included (focal ARDS group, 23; diffuse ARDS group, 72). Before prone positioning, the focal ARDS group showed worse oxygenation than the diffuse ARDS group (median PaO2/FiO2 ratio, 79.9 mm Hg [interquartile range (IQR)], 67.7–112.6 vs. 104.0 mm Hg [IQR, 77.6–135.7]; P=0.042). During prone positioning, the focal ARDS group showed a greater improvement in the PaO2/FiO2 ratio than the diffuse ARDS group (median, 55.8 mm Hg [IQR, 11.1–109.2] vs. 42.8 mm Hg [IQR, 11.6–83.2]); however, the difference was not significant (P=0.705). Among the PaO2/FiO2-matched cohort, there was no significant difference in change in PaO2/FiO2 ratio after prone positioning between the groups (P=0.904).
Conclusions
In patients with moderate-to-severe ARDS, changes in PaO2/FiO2 ratio after prone positioning did not differ according to lung morphology. Therefore, prone positioning can be considered as soon as indicated, regardless of ARDS lung morphology.

Citations

Citations to this article as recorded by

Subphenotypes of Acute Respiratory Distress Syndrome: Advancing Towards Precision Medicine
Andrea R. Levine, Carolyn S. Calfee
Tuberculosis and Respiratory Diseases.2024; 87(1): 1. CrossRef

Nephrology
Clinical efficacy of blood purification using a polymethylmethacrylate hemofilter for the treatment of severe acute pancreatitis: Kiyohiko Kinjoh, Ryoji Nagamura, Yutaka Sakuda, Shoki Yamauchi, Hideta Takushi, Tadashi Iraha, Koji Idomari; Acute Crit Care. 2022;37(3):398-406. Published online July 5, 2022; DOI: https://doi.org/10.4266/acc.2022.00192

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Abstract PDF

Background
Severe acute pancreatitis (SAP) is a systemic inflammatory disease, and it can often complicate into acute kidney injury (AKI) and acute lung injury/acute respiratory distress syndrome (ALI/ARDS). This study aimed to evaluate the clinical effectiveness of blood purification using a polymethylmethacrylate (PMMA) hemofilter.
Methods
We retrospectively examined 54 patients, who were diagnosed with SAP according to the Japanese criteria from January 2011 to December 2019.
Results
Of a total of 54 SAP patients, 26 patients progressively developed AKI and required continuous hemodialysis with a PMMA membrane hemofilter (PMMA-CHD). Acute Physiology and Chronic Health Evaluation (APACHE) II score and Sequential Organ Failure Assessment (SOFA) score were significantly higher in patients requiring PMMA-CHD than in patients not requiring hemodialysis. The lung injury scores were also significantly higher in patients requiring PMMA-CHD. Of the 26 patients, 16 patients developed ALI/ARDS and required mechanical ventilation. A total of seven patients developed severe ALI/ARDS and received additional intermittent hemodiafiltration using a PMMA hemofilter (PMMA-HDF). Although the length of intensive care unit stay was significantly longer in patients with severe ALI/ARDS, blood purification therapy was discontinued in all the patients. The survival rates at the time of discharge were 92.3% and 92.9% in patients with and without PMMA-CHD, respectively. These real mortality ratios were obviously lower than the estimated mortality ratios predicted by APACHE II scores.
Conclusions
These finding suggest that the blood purification using a PMMA hemofilter would be effective for the treatment of AKI and ALI/ARDS in SAP patients.

Citations

Citations to this article as recorded by

A Retrospective Study on the Start and End of Continuous Hemodialysis using a Polymethylmethacrylate Hemofilter for Severe Acute Pancreatitis
Kiyohiko Kinjoh, Ryoji Nagamura, Yutaka Sakuda
Internal Medicine.2024;[Epub] CrossRef
Evaluation of the therapeutic efficiency and efficacy of blood purification in the treatment of severe acute pancreatitis
Hongwei Huang, Zhongshi Huang, Menghua Chen, Ken Okamoto, Chiara Lazzeri
PLOS ONE.2024; 19(1): e0296641. CrossRef
Enhancing Immune Protection in Hemodialysis Patients: Role of the Polymethyl Methacrylate Membrane
Rossana Franzin, Alessandra Stasi, Gianvito Caggiano, Elena Squiccimarro, Vincenzo Losappio, Marco Fiorentino, Carlo Alfieri, Giovanni Stallone, Loreto Gesualdo, Giuseppe Castellano
Blood Purification.2023; : 27. CrossRef

Pulmonary
Association of pulmonary arterial pressure with volume status in patients with acute respiratory distress syndrome receiving extracorporeal membrane oxygenation: Tae Hwa Hong, Hyoung Soo Kim, Sunghoon Park; Acute Crit Care. 2022;37(2):159-167. Published online March 11, 2022; DOI: https://doi.org/10.4266/acc.2021.00927

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Abstract PDF Supplementary Material: Background
Data on pulmonary hemodynamic parameters in patients with acute respiratory distress syndrome (ARDS) receiving extracorporeal membrane oxygenation (ECMO) are scarce.
Methods
The associations between pulmonary artery catheter parameters for the first 7 days of ECMO, fluid balance, and hospital mortality were investigated in adult patients (aged ≥19 years) who received venovenous ECMO for refractory ARDS between 2015 and 2017.
Results
Twenty patients were finally included in the analysis (median age, 56.0 years; interquartile range, 45.5–68.0 years; female, n=10). A total of 140 values were collected for each parameter (i.e., 7 days×20 patients). Net fluid balance was weakly but significantly correlated with systolic and diastolic pulmonary arterial pressures (PAPs; r=0.233 and P=0.011; r=0.376 and P<0.001, respectively). Among the mechanical ventilation parameters, above positive end-expiratory pressure was correlated with systolic PAP (r=0.191 and P=0.025), and static compliance was negatively correlated with diastolic PAP (r=−0.169 and P=0.048). Non-survivors had significantly higher systolic PAPs than in survivors. However, in multivariate analysis, there was no significant association between mean systolic PAP and hospital mortality (odds ratio, 1.500; 95% confidence interval, 0.937–2.404; P=0.091).
Conclusions
Systolic PAP was weakly but significantly correlated with net fluid balance during the early ECMO period in patients with refractory ARDS receiving ECMO.

Infection
Comparison of critically ill COVID-19 and influenza patients with acute respiratory failure: Mehmet Yildirim, Burcin Halacli, Mehmet Yasir Pektezel, Berrin Er, Ismail Tuna Geldigitti, Gulay Tok, Ebru Ortac Ersoy, Arzu Topeli; Acute Crit Care. 2022;37(2):168-176. Published online March 11, 2022; DOI: https://doi.org/10.4266/acc.2021.00920

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Abstract PDF

Background
Coronavirus disease 2019 (COVID-19) is one of the biggest pandemic causing acute respiratory failure (ARF) in the last century. Seasonal influenza carries high mortality, as well. The aim of this study was to compare features and outcomes of critically-ill COVID-19 and influenza patients with ARF.
Methods
Patients with COVID-19 and influenza admitted to intensive care unit with ARF were retrospectively analyzed.
Results
Fifty-four COVID-19 and 55 influenza patients with ARF were studied. Patients with COVID-19 had 32% of hospital mortality, while those with influenza had 47% (P=0.09). Patients with influenza had higher Eastern Cooperative Oncology Group, Clinical Frailty Scale, Acute Physiology and Chronic Health Evaluation II and admission Sequential Organ Failure Assessment (SOFA) scores than COVID-19 patients (P<0.01). Secondary bacterial infection, admission acute kidney injury, procalcitonin level above 0.2 ng/ml were the independent factors distinguishing influenza from COVID-19 while prone positioning differentiated COVID-19 from influenza. Invasive mechanical ventilation (odds ratio [OR], 42.16; 95% confidence interval [CI], 9.45–187.97), admission SOFA score more than 4 (OR, 5.92; 95% CI, 1.85–18.92), malignancy (OR, 4.95; 95% CI, 1.13–21.60), and age more than 65 years (OR, 3.31; 95% CI, 0.99–11.03) were found to be independent risk factors for hospital mortality.
Conclusions
There were few differences in clinical features of critically-ill COVID-19 and influenza patients. Influenza cases had worse performance status and disease severity. There was no significant difference in hospital mortality rates between COVID-19 and influenza patients.

Citations

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Comparison of Clinical Characteristics and Outcomes in Intensive Care Units Between Patients with Coronavirus Disease 2019 (COVID-19) and Patients with Influenza: A Systematic Review and Meta-Analysis
Zhuan Zhong, Xin Wang, Jia Guo, Xingzhao Li, Yingying Han
Journal of Intensive Care Medicine.2024;[Epub] CrossRef
Acute kidney injury in patients with COVID-19 compared to those with influenza: a systematic review and meta-analysis
Chiu-Ying Hsiao, Heng-Chih Pan, Vin-Cent Wu, Ching-Chun Su, Tzu-Hsuan Yeh, Min-Hsiang Chuang, Kuan-Chieh Tu, Hsien-Yi Wang, Wei-Chih Kan, Chun-Chi Yang, Jui-Yi Chen
Frontiers in Medicine.2023;[Epub] CrossRef
Comparison of Clinical Features and Outcomes between SARS-CoV-2 and Non-SARS-CoV-2 Respiratory Viruses Associated Acute Respiratory Distress Syndrome: Retrospective Analysis
Manbong Heo, Jong Hwan Jeong, Sunmi Ju, Seung Jun Lee, Yi Yeong Jeong, Jong Deog Lee, Jung-Wan Yoo
Journal of Clinical Medicine.2022; 11(8): 2246. CrossRef

Case Report

Basic science and research
COVID-19–related acute respiratory distress syndrome treated with veno-venous extracorporeal membrane oxygenation and programmed multi-level ventilation: a case report: Filip Depta, Anton Turčan, Pavol Török, Petra Kapraľová, Michael A. Gentile; Acute Crit Care. 2022;37(3):470-473. Published online January 21, 2022; DOI: https://doi.org/10.4266/acc.2021.01109

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Abstract PDF

We report a patient with severe coronavirus disease 2019 (COVID-19) acute respiratory distress syndrome (ARDS) treated with veno-venous extracorporeal membrane oxygenation (VV ECMO) and programmed multi-level ventilation (PMLV). VV ECMO as a treatment modality for severe ARDS has been described multiple times as a rescue therapy for refractory hypoxemia. It is well known that conventional ventilation can cause ventilator-induced lung injury. Protective ventilation during VV ECMO seems to be beneficial, translating to using low tidal volumes, prone positioning with general concept of open lung approach. However, mechanical ventilation is still required as ECMO per se is usually not sufficient to maintain adequate gas exchange due to hyperdynamic state of the patient and limitation of blood flow via VV ECMO. This report describes ventilation strategy using PMLV during “resting” period of the lung. In short, PMLV is a strategy for ventilating non-homogenous lungs that incorporates expiratory time constants and multiple levels of positive end-expiratory pressure. Using this approach, most affected acute lung injury/ARDS areas can be recruited, while preventing overdistension in healthy areas. To our knowledge, case report using such ventilation strategy for lung resting period has not been previously published.

Citations

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Treatment of acute respiratory failure: extracorporeal membrane oxygenation
Jin-Young Kim, Sang-Bum Hong
Journal of the Korean Medical Association.2022; 65(3): 157. CrossRef

Original Articles

Infection
Clinical characteristics and outcomes of critically ill COVID-19 patients in Sfax, Tunisia: Mabrouk Bahloul, Sana Kharrat, Kamilia Chtara, Malek Hafdhi, Olfa Turki, Najeh Baccouche, Rania Ammar, Nozha Kallel, Majdi Hsairi, Olfa Chakroun-Walha, Chokri Ben Hamida, Hedi Chelly, Khaiereddine Ben Mahfoudh, Abelhamid Karoui, Hela Karray, Noureddine Rekik, Mounir Bouaziz; Acute Crit Care. 2022;37(1):84-93. Published online November 16, 2021; DOI: https://doi.org/10.4266/acc.2021.00129

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Abstract PDF

Background
Africa, like the rest of the world, has been impacted by the coronavirus disease 2019 (COVID-19) pandemic. However, only a few studies covering this subject in Africa have been published. Methods: We conducted a retrospective study of critically ill adult COVID-19 patients—all of whom had a confirmed severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection— admitted to the intensive care unit (ICU) of Habib Bourguiba University Hospital (Sfax, Tunisia). Results: A total of 96 patients were admitted into our ICU for respiratory distress due to COVID-19 infection. Mean age was 62.4±12.8 years and median age was 64 years. Mean arterial oxygen tension (PaO2)/fractional inspired oxygen (FiO2) ratio was 105±60 and ≤300 in all cases but one. Oxygen support was required for all patients (100%) and invasive mechanical ventilation for 38 (40%). Prone positioning was applied in 67 patients (70%). Within the study period, 47 of the 96 patients died (49%). Multivariate analysis showed that the factors associated with poor outcome were the development of acute renal failure (odds ratio [OR], 6.7; 95% confidence interval [CI], 1.75–25.9), the use of mechanical ventilation (OR, 5.8; 95% CI, 1.54–22.0), and serum cholinesterase (SChE) activity lower than 5,000 UI/L (OR, 5.0; 95% CI, 1.34–19). Conclusions: In this retrospective cohort study of critically ill patients admitted to the ICU in Sfax, Tunisia, for acute respiratory failure following COVID-19 infection, the mortality rate was high. The development of acute renal failure, the use of mechanical ventilation, and SChE activity lower than 5,000 UI/L were associated with a poor outcome.

Citations

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Cost Effectiveness of Strategies for Caring for Critically Ill Patients with COVID-19 in Tanzania
Hiral Anil Shah, Tim Baker, Carl Otto Schell, August Kuwawenaruwa, Khamis Awadh, Karima Khalid, Angela Kairu, Vincent Were, Edwine Barasa, Peter Baker, Lorna Guinness
PharmacoEconomics - Open.2023; 7(4): 537. CrossRef
Prognostic Value of Serum Cholinesterase Activity in Severe SARS-CoV-2–Infected Patients Requiring Intensive Care Unit Admission
Mabrouk Bahloul, Sana Kharrat, Saba Makni, Najeh Baccouche, Rania Ammar, Aida Eleuch, Lamia Berrajah, Amel Chtourou, Olfa Turki, Chokri Ben Hamida, Hedi Chelly, Kamilia Chtara, Fatma Ayedi, Mounir Bouaziz
The American Journal of Tropical Medicine and Hygiene.2022; 107(3): 534. CrossRef

Pulmonary
Impact of prone position on outcomes of COVID-19 patients with spontaneous breathing: Mabrouk Bahloul, Sana Kharrat, Malek Hafdhi, Anis Maalla, Olfa Turki, Kamilia Chtara, Rania Ammar, Basma Suissi, Chokri Ben Hamida, Hedi Chelly, Khaiereddine Ben Mahfoudh, Mounir Bouaziz; Acute Crit Care. 2021;36(3):208-214. Published online August 12, 2021; DOI: https://doi.org/10.4266/acc.2021.00500

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Abstract PDF

Background
In this study, we explored whether early application of the prone position (PP) can improve severe hypoxemia and respiratory failure in coronavirus disease 2019 (COVID-19) patients with spontaneous breathing.
Methods
This is a prospective observational study of severe, critically ill adult COVID-19 patients admitted to the intensive care unit. All vital parameters were recorded in real time for all patients. Moreover, the results of chest computed tomography (CT), when available, were analyzed.
Results
PP was applied in 21 patients who were breathing spontaneously. The application of PP was associated with a significant increase in oxygen saturation measured by pulse oximetry (SpO₂) from 82%±12% to 96%±3% (P<0.001) 1 hour later. Moreover, PP was associated with a significant reduction in respiratory rate from 31±10 to 21±4 breaths/min (P<0.001). Furthermore, the number of patients who exhibited signs of respiratory distress after PP was reduced from 10 (47%) to 3 (14%) (P=0.04). Early PP application also led to a clear improvement on CT imaging. It was not, however, associated with a reduction in mortality rate or in the use of invasive mechanical ventilation (P>0.05 for both).
Conclusions
Our study confirmed that the early application of PP can improve hypoxemia and tachypnea in COVID-19 patients with spontaneous breathing. Randomized controlled trials are needed to confirm the beneficial effects of PP in COVID-19 patients with spontaneous breathing.

Citations

Citations to this article as recorded by

Awake prone positioning for patients with COVID-19-related respiratory failure: a systematic review and meta-analysis
Mara Graziani, Andrea Galeazzo Rigutini, Diletta Bartolini, Laura Traballi, Lorenzo Luzi, Rossana Regina, Francesco Bossi, Carla Caponi, Cecilia Becattini
Internal and Emergency Medicine.2024; 19(1): 147. CrossRef
Awake prone positioning for COVID-19 acute hypoxemic respiratory failure in Tunisia
Khaoula Ben Ismail, Fatma Essafi, Imen Talik, Najla Ben Slimene, Ines Sdiri, Boudour Ben Dhia, Takoua Merhbene
Acute and Critical Care.2023; 38(3): 271. CrossRef
Gravity-induced ischemia in the brain-and prone positioning for COVID-19 patients breathing spontaneously
J. Howard Jaster, Giulia Ottaviani
Acute and Critical Care.2022; 37(1): 131. CrossRef
Gravity-induced ischemia in the brain and prone positioning for COVID-19 patients breathing spontaneously: still far from the truth!
Mabrouk Bahloul, Sana Kharrat, Kamilia Chtara, Hedi Chelly, Chokri Ben Hamida, Mounir Bouaziz
Acute and Critical Care.2022; 37(1): 134. CrossRef
A Case of COVID-19 with Acute Exacerbation after Anti-Inflammatory Treatment
Yugo Ashino, Yoichi Shirato, Masahiro Yaegashiwa, Satoshi Yamanouchi, Noriko Miyakawa, Kokichi Ando, Yumiko Sakurada, Haorile Chagan Yasutan, Toshio Hattori
Reports.2022; 5(2): 24. CrossRef
Efficacy and safety of prone position in COVID-19 patients with respiratory failure: a systematic review and meta-analysis
Hyeon-Jeong Lee, Junghyun Kim, Miyoung Choi, Won-Il Choi, Joonsung Joh, Jungeun Park, Joohae Kim
European Journal of Medical Research.2022;[Epub] CrossRef

Pulmonary
Comparison of characteristics and ventilatory course between coronavirus disease 2019 and Middle East respiratory syndrome patients with acute respiratory distress syndrome: Imran Khalid, Romaysaa M Yamani, Maryam Imran, Muhammad Ali Akhtar, Manahil Imran, Rumaan Gul, Tabindeh Jabeen Khalid, Ghassan Y Wali; Acute Crit Care. 2021;36(3):223-231. Published online July 30, 2021; DOI: https://doi.org/10.4266/acc.2021.00388

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Abstract PDF

Background
Both coronavirus disease 2019 (COVID-19) and Middle East respiratory syndrome (MERS) can cause acute respiratory distress syndrome (ARDS); however, their ARDS course and characteristics have not been compared, which we evaluate in our study.
Methods
MERS patients with ARDS seen during the 2014 outbreak and COVID-19 patients with ARDS admitted between March and December 2020 in our hospital were included, and their clinical characteristics, ventilatory course, and outcomes were compared.
Results
Forty-nine and 14 patients met the inclusion criteria for ARDS in the COVID-19 and MERS groups, respectively. Both groups had a median of four comorbidities with high Charlson comorbidity index value of 5 points (P>0.22). COVID-19 patients were older, obese, had significantly higher initial C-reactive protein (CRP), more likely to get trial of high-flow oxygen, and had delayed intubation (P≤0.04). The postintubation course was similar between the groups. Patients in both groups experienced a prolonged duration of mechanical ventilation, and majority received paralytics, dialysis, and vasopressor agents (P>0.28). The respiratory and ventilatory parameters after intubation (including tidal volume, fraction of inspired oxygen, peak and plateau pressures) and their progression over 3 weeks were similar (P>0.05). Rates of mortality in the ICU (53% vs. 64%) and hospital (59% vs. 64%) among COVID-19 and MERS patients (P≥0.54) were very high.
Conclusions
Despite some distinctive differences between COVID-19 and MERS patients prior to intubation, the respiratory and ventilatory parameters postintubation were not different. The higher initial CRP level in COVID-19 patients may explain the steroid responsiveness in this population.

Citations

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Does COVID-19 Vaccine Impact the Soul? A Pre-post Vaccination Comparison of Health Care Workers’ Infection Control Practices and Perspectives
Imran Khalid, Muhammad Ali Akhtar, Manahil Imran, Maryam Imran, Musaab Ahmed Mujalli, Moayad Sami Qashqari, Abeer N Alshukairi, Amina Nisar, Tabindeh Jabeen Khalid
Infectious Diseases in Clinical Practice.2023;[Epub] CrossRef
Advances in mRNA and other vaccines against MERS-CoV
Wanbo Tai, Xiujuan Zhang, Yang Yang, Jiang Zhu, Lanying Du
Translational Research.2022; 242: 20. CrossRef

Pediatric
Oxygenation Index in the First 24 Hours after the Diagnosis of Acute Respiratory Distress Syndrome as a Surrogate Metric for Risk Stratification in Children: Soo Yeon Kim, Byuhree Kim, Sun Ha Choi, Jong Deok Kim, In Suk Sol, Min Jung Kim, Yoon Hee Kim, Kyung Won Kim, Myung Hyun Sohn, Kyu-Earn Kim; Acute Crit Care. 2018;33(4):222-229. Published online November 29, 2018; DOI: https://doi.org/10.4266/acc.2018.00136

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Abstract PDF Supplementary Material

Background
The diagnosis of pediatric acute respiratory distress syndrome (PARDS) is a pragmatic decision based on the degree of hypoxia at the time of onset. We aimed to determine whether reclassification using oxygenation metrics 24 hours after diagnosis could provide prognostic ability for outcomes in PARDS.
Methods
Two hundred and eighty-eight pediatric patients admitted between January 1, 2010 and January 30, 2017, who met the inclusion criteria for PARDS were retrospectively analyzed. Reclassification based on data measured 24 hours after diagnosis was compared with the initial classification, and changes in pressure parameters and oxygenation were investigated for their prognostic value with respect to mortality.
Results
PARDS severity varied widely in the first 24 hours; 52.4% of patients showed an improvement, 35.4% showed no change, and 12.2% either showed progression of PARDS or died. Multivariate analysis revealed that mortality risk significantly increased for the severe group, based on classification using metrics collected 24 hours after diagnosis (adjusted odds ratio, 26.84; 95% confidence interval [CI], 3.43 to 209.89; P=0.002). Compared to changes in pressure variables (peak inspiratory pressure and driving pressure), changes in oxygenation (arterial partial pressure of oxygen to fraction of inspired oxygen) over the first 24 hours showed statistically better discriminative power for mortality (area under the receiver operating characteristic curve, 0.701; 95% CI, 0.636 to 0.766; P<0.001).
Conclusions
Implementation of reclassification based on oxygenation metrics 24 hours after diagnosis effectively stratified outcomes in PARDS. Progress within the first 24 hours was significantly associated with outcomes in PARDS, and oxygenation response was the most discernable surrogate metric for mortality.

Citations

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A single‐center PICU present status survey of pediatric sepsis‐related acute respiratory distress syndrome
Liang Zhou, Shaojun Li, Tian Tang, Xiu Yuan, Liping Tan
Pediatric Pulmonology.2022; 57(9): 2003. CrossRef

Infection
A Retrospective Study Investigating Risks of Acute Respiratory Distress Syndrome and Mortality Following Human Metapneumovirus Infection in Hospitalized Adults: Hyunjung Hwang, Yujin Kim, Jeong-Woong Park, Sung Hwan Jeong, Sun Young Kyung; Korean J Crit Care Med. 2017;32(2):182-189. Published online May 31, 2017; DOI: https://doi.org/10.4266/kjccm.2017.00038

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Background
Human metapneumovirus (hMPV) is a relatively recently identified respiratory virus that induces respiratory symptoms similar to those of respiratory syncytial virus infection in children. The characteristics of hMPV-infected adults are unclear because few cases have been reported.
Methods
We conducted a retrospective review of hospitalized adult patients with a positive multiplex real-time polymerase chain reaction assay result from 2012 to 2016 at a single tertiary referral hospital in South Korea. We analyzed clinical characteristics of the enrolled patients and divided patients into an acute respiratory distress syndrome (ARDS) group and a non-ARDS group.
Results
In total, 110 adults were reviewed in this study. Their mean age was 61.4 years, and the majority (n = 105, 95.5%) had comorbidities or were immunocompromised. Most of the patients had pneumonia on chest X-ray (n = 88, 93.6%), 22 (20.0%) had ARDS, and 12 (10.9%) expired during hospitalization. The mortality rate for patients with ARDS was higher than that of the other patients (36.4% vs. 5.7%, P = 0.001). The risk factor for hMPV-associated ARDS was heart failure (odds ratio, 5.24; P = 0.044) and laboratory values were increased blood urea nitrogen and increased C-reactive protein. The acquisition site of infection was divided into community vs. nosocomial; 43 patients (39.1%) had a nosocomial infection. The risk factors for nosocomial infection were an immunocompromised state, malignancy and immunosuppressive treatment.
Conclusions
These data suggest that hMPV is one of the important respiratory pathogens important respiratory pathogen that causes pneumonia/ARDS in elderly, immunocompromised individuals and that it may be transmitted via the nosocomial route.

Citations

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A Case of Metapneumovirus Pneumonia-Related Acute Respiratory Distress Syndrome in a Young Adult Patient
Tae Wan Kim, Won-Young Kim
The Korean Journal of Medicine.2024; 99(2): 111. CrossRef
Human Metapneumovirus Pneumonia Precipitating Acute Respiratory Distress Syndrome in an Adult Patient
Dena H Tran, Muhammad Sameed, Ellen T Marciniak, Avelino C Verceles
Cureus.2021;[Epub] CrossRef
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Pulmonary
Effect of Renin-Angiotensin System Blockage in Patients with Acute Respiratory Distress Syndrome: A Retrospective Case Control Study: Joohae Kim, Sun Mi Choi, Jinwoo Lee, Young Sik Park, Chang Hoon Lee, Jae-Joon Yim, Chul-Gyu Yoo, Young Whan Kim, Sung Koo Han, Sang-Min Lee; Korean J Crit Care Med. 2017;32(2):154-163. Published online May 31, 2017; DOI: https://doi.org/10.4266/kjccm.2016.00976

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185 Download
29 Web of Science
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Abstract PDF

Background
Acute respiratory distress syndrome (ARDS) remains a life-threatening disease. Many patients with ARDS do not recover fully, and progress to terminal lung fibrosis. Angiotensin-converting enzyme (ACE) inhibitor is known to modulate the neurohormonal system to reduce inflammation and to prevent tissue fibrosis. However, the role of ACE inhibitor in the lungs is not well understood. We therefore conducted this study to elucidate the effect of renin-angiotensin system (RAS) blockage on the prognosis of patients with ARDS.
Methods
We analyzed medical records of patients who were admitted to the medical intensive care unit (ICU) at a tertiary care hospital from January 2005 to December 2010. ARDS was determined using the Berlin definition. The primary outcome was the mortality rate of ICU. Survival analysis was performed after adjustment using propensity score matching.
Results
A total of 182 patients were included in the study. Thirty-seven patients (20.3%) took ACE inhibitor or angiotensin receptor blocker (ARB) during ICU admission, and 145 (79.7%) did not; both groups showed similar severity scores. In the ICU, mortality was 45.9% in the RAS inhibitor group and 58.6% in the non-RAS inhibitor group (P = 0.166). The RAS inhibitor group required a longer duration of mechanical ventilation (29.5 vs. 19.5, P = 0.013) and longer ICU stay (32.1 vs. 20.2 days, P < 0.001). In survival analysis, the RAS inhibitor group showed better survival rates than the non-RAS group (P < 0.001).
Conclusions
ACE inhibitor or ARB may have beneficial effect on ARDS patients.

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Case Reports

Trauma
Long-term extracorporeal membrane oxygenation after severe blunt traumatic lung injury in a child: Ok Jeong Lee, Yang Hyun Cho, Jinwook Hwang, Inae Yoon, Young-Ho Kim, Joongbum Cho; Acute Crit Care. 2019;34(3):223-227. Published online February 10, 2017; DOI: https://doi.org/10.4266/acc.2016.00472

26,916 View
183 Download
3 Web of Science
2 Crossref

Abstract PDF

Managing acute respiratory distress syndrome (ARDS) after severe blunt traumatic lung injury can be challenging. In cases where patients are refractory to conventional therapy, extracorporeal membrane oxygenation (ECMO) should be considered. In addition, the heparin-coated circuit can reduce hemorrhagic complications in patients with multiple traumas. Although prolonged ECMO may be necessary, excellent outcomes are frequently associated. In this study, we report long-term support with venovenous-ECMO applied in a child with severe blunt trauma in Korea. This 10-year-old and 30-kg male with severe blunt thoracic trauma after a car accident developed severe ARDS a few days later, and ECMO was administered for 33 days. Because of pulmonary hemorrhage during ECMO support, heparin was stopped for 3 days and then restarted. He was weaned from ECMO successfully and has been able to run without difficulty for the 2 years since discharge.

Citations

Citations to this article as recorded by

Traumatic main airway rupture successfully rescued by extracorporeal membrane oxygenation: A case report
Lijun Cao, Jun Xu, Linfeng Tang, Yuli Zhou, Xianhua Xiang
Experimental and Therapeutic Medicine.2023;[Epub] CrossRef
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Changtian Wang, Lei Zhang, Tao Qin, Zhilong Xi, Lei Sun, Haiwei Wu, Demin Li
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Pulmonary/Cardiology
Successful Use of Extracorporeal Membrane Oxygenation in Diffuse Alveolar Hemorrhage Secondary to Systemic Lupus Erythematosus: Gyu Ho Choi, Mi Il Kang; Korean J Crit Care Med. 2016;31(4):364-368. Published online November 30, 2016; DOI: https://doi.org/10.4266/kjccm.2016.00451

8,024 View
131 Download

Abstract PDF: Diffuse alveolar hemorrhage (DAH) is an uncommon complication in patients with systemic lupus erythematosus (SLE), and mortality remains high. In recent years, cases of DAH due to SLE treated with extracorporeal membrane oxygenation (ECMO) have rarely been reported. The authors present a case of a 43-year-old woman with SLE who had rapidly aggravating dyspnea and hemoptysis. She was diagnosed as having DAH with refractory respiratory failure and was successfully managed with veno-venous ECMO. We propose ECMO as a useful salvage therapy in patients with alveolar hemorrhage secondary to SLE who are failing conventional ventilatory support.

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