Acute and Critical Care

Guideline

Pulmonary
Liberation from mechanical ventilation in critically ill patients: Korean Society of Critical Care Medicine Clinical Practice Guidelines: Tae Sun Ha, Dong Kyu Oh, Hak-Jae Lee, Youjin Chang, In Seok Jeong, Yun Su Sim, Suk-Kyung Hong, Sunghoon Park, Gee Young Suh, So Young Park; Acute Crit Care. 2024;39(1):1-23. Published online February 28, 2024; DOI: https://doi.org/10.4266/acc.2024.00052

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Abstract PDF Supplementary Material: Background
Successful liberation from mechanical ventilation is one of the most crucial processes in critical care because it is the first step by which a respiratory failure patient begins to transition out of the intensive care unit and return to their own life. Therefore, when devising appropriate strategies for removing mechanical ventilation, it is essential to consider not only the individual experiences of healthcare professionals, but also scientific and systematic approaches. Recently, numerous studies have investigated methods and tools for identifying when mechanically ventilated patients are ready to breathe on their own. The Korean Society of Critical Care Medicine therefore provides these recommendations to clinicians about liberation from the ventilator. Methods: Meta-analyses and comprehensive syntheses were used to thoroughly review, compile, and summarize the complete body of relevant evidence. All studies were meticulously assessed using the Grading of Recommendations, Assessment, Development, and Evaluation (GRADE) method, and the outcomes were presented succinctly as evidence profiles. Those evidence syntheses were discussed by a multidisciplinary committee of experts in mechanical ventilation, who then developed and approved recommendations. Results: Recommendations for nine PICO (population, intervention, comparator, and outcome) questions about ventilator liberation are presented in this document. This guideline includes seven conditional recommendations, one expert consensus recommendation, and one conditional deferred recommendation. Conclusions: We developed these clinical guidelines for mechanical ventilation liberation to provide meaningful recommendations. These guidelines reflect the best treatment for patients seeking liberation from mechanical ventilation.

Original Articles

Pulmonary
Association between mechanical power and intensive care unit mortality in Korean patients under pressure-controlled ventilation: Jae Kyeom Sim, Sang-Min Lee, Hyung Koo Kang, Kyung Chan Kim, Young Sam Kim, Yun Seong Kim, Won-Yeon Lee, Sunghoon Park, So Young Park, Ju-Hee Park, Yun Su Sim, Kwangha Lee, Yeon Joo Lee, Jin Hwa Lee, Heung Bum Lee, Chae-Man Lim, Won-Il Choi, Ji Young Hong, Won Jun Song, Gee Young Suh; Acute Crit Care. 2024;39(1):91-99. Published online January 26, 2024; DOI: https://doi.org/10.4266/acc.2023.00871

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Abstract PDF Supplementary Material: Background
Mechanical power (MP) has been reported to be associated with clinical outcomes. Because the original MP equation is derived from paralyzed patients under volume-controlled ventilation, its application in practice could be limited in patients receiving pressure-controlled ventilation (PCV). Recently, a simplified equation for patients under PCV was developed. We investigated the association between MP and intensive care unit (ICU) mortality. Methods: We conducted a retrospective analysis of Korean data from the Fourth International Study of Mechanical Ventilation. We extracted data of patients under PCV on day 1 and calculated MP using the following simplified equation: MPPCV = 0.098 ∙ respiratory rate ∙ tidal volume ∙ (ΔPinsp + positive end-expiratory pressure), where ΔPinsp is the change in airway pressure during inspiration. Patients were divided into survivors and non-survivors and then compared. Multivariable logistic regression was performed to determine association between MPPCV and ICU mortality. The interaction of MPPCV and use of neuromuscular blocking agent (NMBA) was also analyzed. Results: A total of 125 patients was eligible for final analysis, of whom 38 died in the ICU. MPPCV was higher in non-survivors (17.6 vs. 26.3 J/min, P<0.001). In logistic regression analysis, only MPPCV was significantly associated with ICU mortality (odds ratio, 1.090; 95% confidence interval, 1.029–1.155; P=0.003). There was no significant effect of the interaction between MPPCV and use of NMBA on ICU mortality (P=0.579). Conclusions: MPPCV is associated with ICU mortality in patients mechanically ventilated with PCV mode, regardless of NMBA use.

Nursing
Effect of fourth hourly oropharyngeal suctioning on ventilator-associated events in patients requiring mechanical ventilation in intensive care units of a tertiary care center in South India: a randomized controlled trial: Khanjana Borah, Lakshmi Ramamoorthy, Muthapillai Senthilnathan, Rajeswari Murugesan, Hmar Thiak Lalthanthuami, Rani Subramaniyan; Acute Crit Care. 2023;38(4):460-468. Published online November 24, 2023; DOI: https://doi.org/10.4266/acc.2022.01501

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Abstract PDF: Background
Mechanical ventilation (MV) is a necessary life-saving measure for critically ill patients. Ventilator-associated events (VAEs) are potentially avoidable complications associated with MV that can double the rate of death. Oral care and oropharyngeal suctioning, although neglected procedures, play a vital role in the prevention of VAE.
Methods
A randomized controlled trial was conducted in the intensive care units to compare the effect of fourth hourly oropharyngeal suctioning with the standard oral care protocol on VAE among patients on MV. One hundred twenty mechanically ventilated patients who were freshly intubated and expected to be on ventilator support for the next 72 hours were randomly allocated to the control or intervention groups. The intervention was fourth hourly oropharyngeal suctioning along with the standard oral care procedure. The control group received standard oral care (i.e., thrice a day) and on-demand oral suctioning. On the 3rd and 7th days following the intervention, endotracheal aspirates were sent to rule out ventilator-associated pneumonia.
Results
Both groups were homogenous at baseline with respect to their clinical characteristics. The intervention group had fewer VAEs (56.7%) than the control group (78.3%) which was significant at P<0.01. A significant reduction in the status of “positive culture” on ET aspirate also been observed following the 3rd day of the intervention (P<0.001).
Conclusions
One of the most basic preventive strategies is providing oral care. Oropharyngeal suctioning is also an important component of oral care that prevents microaspiration. Hence, fourth-hourly oropharyngeal suctioning with standard oral care significantly reduces the incidence of VAE.

Review Article

Neurosurgery
Brain-lung interaction: a vicious cycle in traumatic brain injury: Ariana Alejandra Chacón-Aponte, Érika Andrea Durán-Vargas, Jaime Adolfo Arévalo-Carrillo, Iván David Lozada-Martínez, Maria Paz Bolaño-Romero, Luis Rafael Moscote-Salazar, Pedro Grille, Tariq Janjua; Acute Crit Care. 2022;37(1):35-44. Published online February 11, 2022; DOI: https://doi.org/10.4266/acc.2021.01193

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Abstract PDF

The brain-lung interaction can seriously affect patients with traumatic brain injury, triggering a vicious cycle that worsens patient prognosis. Although the mechanisms of the interaction are not fully elucidated, several hypotheses, notably the “blast injury” theory or “double hit” model, have been proposed and constitute the basis of its development and progression. The brain and lungs strongly interact via complex pathways from the brain to the lungs but also from the lungs to the brain. The main pulmonary disorders that occur after brain injuries are neurogenic pulmonary edema, acute respiratory distress syndrome, and ventilator-associated pneumonia, and the principal brain disorders after lung injuries include brain hypoxia and intracranial hypertension. All of these conditions are key considerations for management therapies after traumatic brain injury and need exceptional case-by-case monitoring to avoid neurological or pulmonary complications. This review aims to describe the history, pathophysiology, risk factors, characteristics, and complications of brain-lung and lung-brain interactions and the impact of different old and recent modalities of treatment in the context of traumatic brain injury.

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Na Zhao, Chao Liu, Xinxin Tian, Juan Yang, Tianen Wang
Experimental Cell Research.2024; 434(2): 113873. CrossRef
Oral administration of lysozyme protects against injury of ileum via modulating gut microbiota dysbiosis after severe traumatic brain injury
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Frontiers in Cellular and Infection Microbiology.2024;[Epub] CrossRef
Pulmonary Effects of Traumatic Brain Injury in Mice: A Gene Set Enrichment Analysis
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International Journal of Molecular Sciences.2024; 25(5): 3018. CrossRef
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Thao L. Nguyen, Dennis W. Simon, Yi-Chen Lai
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Luis Rafael Moscote-Salazar, William A. Florez-Perdomo, Tariq Janjua
Indian Journal of Neurotrauma.2023;[Epub] CrossRef
Targeted Nanocarriers Co-Opting Pulmonary Intravascular Leukocytes for Drug Delivery to the Injured Brain
Jia Nong, Patrick M. Glassman, Jacob W. Myerson, Viviana Zuluaga-Ramirez, Alba Rodriguez-Garcia, Alvin Mukalel, Serena Omo-Lamai, Landis R. Walsh, Marco E. Zamora, Xijing Gong, Zhicheng Wang, Kartik Bhamidipati, Raisa Y. Kiseleva, Carlos H. Villa, Colin F
ACS Nano.2023; 17(14): 13121. CrossRef
Manejo postoperatorio de resección de tumores cerebrales en la unidad de cuidado intensivo
Andrés Felipe Naranjo Ramírez, Álvaro de Jesús Medrano Areiza, Bryan Arango Sánchez, Juan Carlos Arango Martínez, Luis Fermín Naranjo Atehortúa
Acta Colombiana de Cuidado Intensivo.2023;[Epub] CrossRef
Modulation of MAPK/NF-κB Pathway and NLRP3 Inflammasome by Secondary Metabolites from Red Algae: A Mechanistic Study
Asmaa Nabil-Adam, Mohamed L. Ashour, Mohamed Attia Shreadah
ACS Omega.2023; 8(41): 37971. CrossRef
American Association for the Surgery of Trauma/American College of Surgeons Committee on Trauma clinical protocol for management of acute respiratory distress syndrome and severe hypoxemia
Jason A. Fawley, Christopher J. Tignanelli, Nicole L. Werner, George Kasotakis, Samuel P. Mandell, Nina E. Glass, David J. Dries, Todd W. Costantini, Lena M. Napolitano
Journal of Trauma and Acute Care Surgery.2023; 95(4): 592. CrossRef
The role of cardiac dysfunction and post-traumatic pulmonary embolism in brain-lung interactions following traumatic brain injury
Mabrouk Bahloul, Karama Bouchaala, Najeh Baccouche, Kamilia Chtara, Hedi Chelly, Mounir Bouaziz
Acute and Critical Care.2022; 37(2): 266. CrossRef
Allocation of Donor Lungs in Korea
Hye Ju Yeo
Journal of Chest Surgery.2022; 55(4): 274. CrossRef
Mapping brain endophenotypes associated with idiopathic pulmonary fibrosis genetic risk
Ali-Reza Mohammadi-Nejad, Richard J. Allen, Luke M. Kraven, Olivia C. Leavy, R. Gisli Jenkins, Louise V. Wain, Dorothee P. Auer, Stamatios N. Sotiropoulos
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Use of bedside ultrasound in the evaluation of acute dyspnea: a comprehensive review of evidence on diagnostic usefulness
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Revista Investigación en Salud Universidad de Boyacá.2022;[Epub] CrossRef

Original Articles

Pulmonary
Diaphragm ultrasound as a better predictor of successful extubation from mechanical ventilation than rapid shallow breathing index: Mohammad Jhahidul Alam, Simanta Roy, Mohammad Azmain Iktidar, Fahmida Khatun Padma, Khairul Islam Nipun, Sreshtha Chowdhury, Ranjan Kumar Nath, Harun-Or Rashid; Acute Crit Care. 2022;37(1):94-100. Published online January 11, 2022; DOI: https://doi.org/10.4266/acc.2021.01354

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Abstract PDF

Background
In 3%–19% of patients, reintubation is needed 48–72 hours following extubation, which increases intensive care unit (ICU) morbidity, mortality, and expenses. Extubation failure is frequently caused by diaphragm dysfunction. Ultrasonography can be used to determine the mobility and thickness of the diaphragm. This study looked at the role of diaphragm excursion (DE) and thickening fraction in predicting successful extubation from mechanical ventilation.
Methods
Thirty-one patients were extubated with the advice of an ICU consultant using the ICU weaning regimen and diaphragm ultrasonography was performed. Ultrasound DE and thickening fraction were measured three times: at the commencement of the t-piece experiment, at 10 minutes, and immediately before extubation. All patients' parameters were monitored for 48 hours after extubation. Rapid shallow breathing index (RSBI) was also measured at the same time.
Results
Successful extubation was significantly correlated with DE (P=0.01). Receiver curve analysis for DE to predict successful extubation revealed good properties (area under the curve [AUC], 0.83; P<0.001); sensitivity, 77.8%; specificity, 84.6%, positive predictive value (PPV), 87.5%; negative predictive value (NPV), 73.3% while cut-off value, 11.43 mm. Diaphragm thickening fraction (DTF) also revealed moderate curve properties (AUC, 0.69; P=0.06); sensitivity, 61.1%; specificity, 84.6%; PPV, 87.5%; NPV, 61.1% with cut-off value 22.33% although former one was slightly better. RSBI could not reach good receiver operating characteristic value at cut-off points 100 b/min/L (AUC, 0.58; P=0.47); sensitivity, 66.7%; specificity, 53.8%; PPV, 66.7%; NPV, 53.8%).
Conclusions
To decrease the rate of reintubation, DE and DTF are better indicators of successful extubation. DE outperforms DTF.

Citations

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Rapid shallow breathing index predicting extubation outcomes: A systematic review and meta-analysis
Donghui Jia, Hengyang Wang, Qian Wang, Wenrui Li, Xuhong Lan, Hongfang Zhou, Zhigang Zhang
Intensive and Critical Care Nursing.2024; 80: 103551. CrossRef
Ultrasonography to Access Diaphragm Dysfunction and Predict the Success of Mechanical Ventilation Weaning in Critical Care
Marta Rafael Marques, José Manuel Pereira, José Artur Paiva, Gonzalo García de Casasola‐Sánchez, Yale Tung‐Chen
Journal of Ultrasound in Medicine.2024; 43(2): 223. CrossRef
The Role of Ultrasonography in the Process of Weaning from Mechanical Ventilation in Critically Ill Patients
Lou’i Al-Husinat, Basil Jouryyeh, Ahlam Rawashdeh, Chiara Robba, Pedro Silva, Patricia Rocco, Denise Battaglini
Diagnostics.2024; 14(4): 398. CrossRef
Critical illness-associated limb and diaphragmatic weakness
Valentine Le Stang, Nicola Latronico, Martin Dres, Michele Bertoni
Current Opinion in Critical Care.2024; 30(2): 121. CrossRef
Accuracy of respiratory muscle assessments to predict weaning outcomes: a systematic review and comparative meta-analysis
Diego Poddighe, Marine Van Hollebeke, Yasir Qaiser Choudhary, Débora Ribeiro Campos, Michele R. Schaeffer, Jan Y. Verbakel, Greet Hermans, Rik Gosselink, Daniel Langer
Critical Care.2024;[Epub] CrossRef
Ultrasonographic Assessment of Diaphragmatic Function and Its Clinical Application in the Management of Patients with Acute Respiratory Failure
Marina Saad, Stefano Pini, Fiammetta Danzo, Francesca Mandurino Mirizzi, Carmine Arena, Francesco Tursi, Dejan Radovanovic, Pierachille Santus
Diagnostics.2023; 13(3): 411. CrossRef
The ratio of respiratory rate to diaphragm thickening fraction for predicting extubation success
Dararat Eksombatchai, Chalermwut Sukkratok, Yuda Sutherasan, Detajin Junhasavasdikul, Pongdhep Theerawit
BMC Pulmonary Medicine.2023;[Epub] CrossRef
Effectiveness of diaphragmatic ultrasound as a predictor of successful weaning from mechanical ventilation: a systematic review and meta-analysis
Henry M. Parada-Gereda, Adriana L. Tibaduiza, Alejandro Rico-Mendoza, Daniel Molano-Franco, Victor H. Nieto, Wanderley A. Arias-Ortiz, Purificación Perez-Terán, Joan R. Masclans
Critical Care.2023;[Epub] CrossRef
Value of Diaphragm Ultrasonography for Extubation: A Single-Blinded Randomized Clinical Trial
T. G. Toledo, M. R. Bacci, Fred A. Luchette
Critical Care Research and Practice.2023; 2023: 1. CrossRef
Role of diaphragm ultrasound in weaning mechanically ventilated patients: A prospective observational study
Ravi Saravanan, Krishnamurthy Nivedita, Krishnamoorthy Karthik, Rajagopalan Venkatraman
Indian Journal of Anaesthesia.2022; 66(8): 591. CrossRef
The role of diaphragmatic thickness measurement in weaning prediction and its comparison with rapid shallow breathing index: a single-center experience
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Indian Journal of Anaesthesia.2022; 66(11): 776. CrossRef
Comparison of assessment of diaphragm function using speckle tracking between patients with successful and failed weaning: a multicentre, observational, pilot study
Qiancheng Xu, Xiao Yang, Yan Qian, Chang Hu, Weihua Lu, Shuhan Cai, Bo Hu, Jianguo Li
BMC Pulmonary Medicine.2022;[Epub] CrossRef
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Pulmonary
Safety and feasibility of hybrid tracheostomy: Daeun Kang, In Beom Jeong, Sun Jung Kwon, Ji Woong Son, Gwan Woo Ku; Acute Crit Care. 2021;36(4):369-373. Published online November 26, 2021; DOI: https://doi.org/10.4266/acc.2021.00801

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Abstract PDF

Background
Percutaneous dilatational tracheostomy (PDT) is widely used in intensive care units, but this conventional method has some disadvantages, such as requirement of a lot of equipment and experts at the site. Especially, in situations where the patient is isolated due to an infectious disease, difficulties in using the equipment may occur, and the number of exposed persons may increase. In this paper, we introduce hybrid tracheostomy that combines the advantages of surgical tracheostomy and PDT and describe our experiences.
Methods
Data from 55 patients who received hybrid tracheostomy without bronchoscopy from January 2020 to February 2021 were collected and reviewed retrospectively. Hybrid tracheostomy was performed at the bedside by a single thoracic surgeon. The hybrid tracheostomy method was as follows: after the skin was incised and the trachea was exposed, only the extent of the endotracheal tube that could not be removed was withdrawn, and then tracheostomy was performed by the Seldinger method using a PDT kit.
Results
The average age was 66.5 years, and the proportion of men was 69.1%. Among the patients, 21.8% were taking antiplatelet drugs and 14.5% were taking anticoagulants. The average duration of the procedure was 13.3 minutes. There was no major bleeding, and there was one case of paratracheal placement of the tracheostomy tube.
Conclusions
In most patients, the procedure can be safely performed without any major complications. However, patients with a short neck, a neck burn or patients who have received radiation therapy to the neck should be treated with conventional methods.

Citations

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A Modified Technique for Percutaneous Dilatational Tracheostomy
Zahra Ghotbi, Mehrdad Estakhr, Mehdi Nikandish, Reza Nikandish
Journal of Intensive Care Medicine.2023; 38(9): 878. CrossRef

Pulmonary
Under or overpressure: an audit of endotracheal cuff pressure monitoring at the tertiary care center: Biju Viswambharan, Manjini Jeyaram Kumari, Gopala Krishnan, Lakshmi Ramamoorthy; Acute Crit Care. 2021;36(4):374-379. Published online November 26, 2021; DOI: https://doi.org/10.4266/acc.2021.00024

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Abstract PDF

Background
Mechanical ventilation is a lifesaving intervention for critically ill patients but can produce the major complication of ventilator-associated pneumonia (VAP). Inappropriately inflated endotracheal tubes cause potential harm due to high or low pressure; this can be prevented through monitoring protocols.
Methods
A cross-sectional study of 348 cuff pressure readings was performed with intubated and mechanically ventilated patients to evaluate the exact proportion of patients in intensive care units (ICUs) where the cuff pressure is optimal and to identify the ICUs where device-based monitoring is available to produce a lower proportion of sub-optimal cuff pressure cases. Every three days, cuff pressure was assessed with a handheld cuff pressure manometer. The corresponding VAP rates of those ICUs were obtained from the hospital infection control department.
Results
Cuff pressure of 40.2% was the lower cutoff for the high category, that of optimal was 35.3%, and the highest cutoff of sub-optimal was 24.4%. This study also showed ICUs that had cuff pressure monitoring devices and protocols. Active measurement protocols had a higher proportion of optimal cuff pressure (58.5%) and a lower proportion of sub-optimal and high cuff pressure (19.5% and 22.0%) compared to ICUs with no device-based monitoring protocols. Furthermore, the VAP rate of ICUs exhibited a weak positive correlation with sub-optimal cuff pressure.
Conclusions
Device-based cuff pressure monitoring is essential in maintaining adequate cuff pressure but often is inadequate, resulting in high readings. Therefore, this study suggests that device-based cuff pressure monitoring be practiced.

Citations

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Pressure changes in the endotracheal tube cuff in otorhinolaryngologic surgery: a prospective observational study
Sujung Park, Young In Kwon, Hyun Joo Kim
Frontiers in Medicine.2023;[Epub] CrossRef
Correlación entre la presión del manguito del tubo endotraqueal y los síntomas laringotraqueales en postoperatorio
Wedley Peñaloza, Reyes Cruz Manuel Reyes, Evelin Núñez Wong
Revista Gaceta Médica JBG.2023;[Epub] CrossRef
Efficacy of using an intravenous catheter to repair damaged expansion lines of endotracheal tubes and laryngeal masks
Tingting Wang, Jiang Wang, Yao Lu, Xuesheng Liu, Shangui Chen
BMC Anesthesiology.2022;[Epub] CrossRef

Nursing
Effect of modified care bundle for prevention of ventilator-associated pneumonia in critically-ill neurosurgical patients: Suphannee Triamvisit, Wassana Wongprasert, Chalermwoot Puttima, Matchima Na Chiangmai, Nawaphan Thienjindakul, Laksika Rodkul, Chumpon Jetjumnong; Acute Crit Care. 2021;36(4):294-299. Published online November 23, 2021; DOI: https://doi.org/10.4266/acc.2021.00983

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Abstract PDF: Background
Care bundles for ventilator-associated pneumonia (VAP) have been shown to minimize the rate of VAP in critically ill patients. Standard care bundles may need to be modified in resource-constrained situations. The goal of this study was to see if our modified VAP-care bundles lowered the risk of VAP in neurosurgical patients.
Methods
A prospective cohort study was conducted in mechanically ventilated neurosurgical patients. The VAP bundle was adjusted in the cohort group by increasing the frequency of intermittent endotracheal tube cuff pressure monitoring to six times a day while reducing oral care with 0.12% chlorhexidine to three times a day. The rate of VAP was compared to the historical control group.
Results
A total of 146 and 145 patients were enrolled in control and cohort groups, respectively. The mean age of patients was 52±16 years in both groups (P=0.803). The admission Glasgow coma scores were 7.79±2.67 and 7.80±2.77 in control and cohort group, respectively (P=0.969). VAP was found in nine patients in control group but only one patient in cohort group. The occurrence rate of VAP was significantly reduced in cohort group compared to control group (0.88/1,000 vs. 6.84/1,000 ventilator days, P=0.036).
Conclusions
The modified VAP bundle is effective in lowering the VAP rate in critically ill neurosurgical patients. It requires low budget and manpower and can be employed in resource-constrained settings.

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

Citations to this article as recorded by

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

Pulmonary
Development of a prognostic scoring system in patients with pneumonia requiring ventilator care for more than 4 days: a single-center observational study: Yeseul Oh, Yewon Kang, Kwangha Lee; Acute Crit Care. 2021;36(1):46-53. Published online February 17, 2021; DOI: https://doi.org/10.4266/acc.2020.00787

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Abstract PDF

Background
The aim of the present study was to develop a prognostic model using demographic characteristics, comorbidities, and clinical variables measured on day 4 of mechanical ventilation (MV) for patients with prolonged acute mechanical ventilation (PAMV; MV for >96 hours).
Methods
Data from 437 patients (70.9% male; median age, 68 years) were obtained over a period of 9 years. All patients were diagnosed with pneumonia. Binary logistic regression identified factors predicting mortality at 90 days after the start of MV. A PAMV prognosis score was calculating ß-coefficient values and assigning points to variables.
Results
The overall 90-day mortality rate was 47.1%. Five factors (age ≥65 years, body mass index <18.5 kg/m², hemato-oncologic diseases as comorbidities, requirement for vasopressors on day 4 of MV and requirement for neuromuscular blocking agents on day 4 of MV) were identified as prognostic indicators. Each factor was valued as +1 point, and used to develop a PAMV prognosis score. This score showed acceptable discrimination (area under the receiver operating characteristic curve of 0.695 for mortality, 95% confidence interval 0.650–0.738, p<0.001), and calibration (Hosmer–Lemeshow chi-square=6.331, with df 7 and p=0.502). The cutoff value for predicting mortality based on the maximum Youden index was ≤2 (sensitivity, 87.5%; specificity, 41.3%). For patients with PAMV scores ≤1, 2, 3 and ≥4, the 90-day mortality rates were 29.2%, 45.7%, 67.9%, and 90.9%, respectively (P<0.001).
Conclusions
Our study developed a PAMV prognosis score for predicting 90-day mortality. Further research is needed to validate the utility of this score.

Citations

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Ability of the modified NUTRIC score to predict mortality in patients requiring short-term versus prolonged acute mechanical ventilation: a retrospective cohort study
Wanho Yoo, Hyojin Jang, Hayoung Seong, Saerom Kim, Soo Han Kim, Eun-Jung Jo, Jung Seop Eom, Kwangha Lee
Therapeutic Advances in Respiratory Disease.2024;[Epub] CrossRef
Association between mechanical power and intensive care unit mortality in Korean patients under pressure-controlled ventilation
Jae Kyeom Sim, Sang-Min Lee, Hyung Koo Kang, Kyung Chan Kim, Young Sam Kim, Yun Seong Kim, Won-Yeon Lee, Sunghoon Park, So Young Park, Ju-Hee Park, Yun Su Sim, Kwangha Lee, Yeon Joo Lee, Jin Hwa Lee, Heung Bum Lee, Chae-Man Lim, Won-Il Choi, Ji Young Hong
Acute and Critical Care.2024; 39(1): 91. CrossRef

Pulmonary
Predictive value of the negative inspiratory force index as a predictor of weaning success: a crosssectional study: Phuong Hoang Vu, Viet Duc Tran, Minh Cuong Duong, Quyet Thang Cong, Thu Nguyen; Acute Crit Care. 2020;35(4):279-285. Published online November 30, 2020; DOI: https://doi.org/10.4266/acc.2020.00598

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Abstract PDF

Background
Identifying when intubated patients are ready to be extubated remains challenging. The negative inspiratory force (NIF) is a recommended predictor of weaning success. However, little is known about the role of NIF in the weaning process for the Asian surgical intensive population, especially for the Vietnamese population. Here, we aimed to investigate the cutoff threshold and predictive value of the NIF index for predicting the success of ventilator weaning in Vietnamese surgical intensive care patients.
Methods
A cross-sectional study was conducted at the Surgical Intensive Care Unit of Viet Duc Hospital from October 2016 to August 2017. A total of 64 patients aged 16–70 years undergoing ventilatory support through an orotracheal tube satisfied the criteria for readiness to begin weaning. The correlation between the NIF index with outcomes of the weaning process was analyzed. Specificity (Sp), sensitivity (Se), positive predictive value (PPV), negative predictive value (NPV), receiver operating characteristic (ROC) curve, and area under the curve (AUC) were calculated.
Results
The success rate of the entire weaning process was 67.2% (43/64). The median NIF values were –26.0 cm H₂O (interquartile range [IQR], –28.0 to –25.0) in the successful weaning group and –24.0 cm H₂O (IQR, –25.0 to –23.0) in the weaning failure group (P<0.001). According to ROC analysis, an NIF value ≤–25 cm H₂O predicted weaning success (AUC, 0.836) with 91% Se, 62% Sp, 83% PPV, and 77% NPV.
Conclusions
An NIF cutoff threshold ≤–25 cm H₂O can be used as predictor of weaning success in Vietnamese surgical intensive care patients.

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Pendelluft as a predictor of weaning in critically ill patients: An observational cohort study
Danqiong Wang, Yaxin Ning, Linya He, Keqi Pan, Xiaohua Xiong, Shanshan Jing, Jianhua Hu, Jian Luo, Dehua Ye, Zubing Mei, Weiwen Zhang
Frontiers in Physiology.2023;[Epub] CrossRef
Morphological and Functional Alterations of Respiratory Muscle Performance and Spirometry Parameters in Patients with Congestive Heart Failure
V. S. Shabaev, I. V. Orazmagomedova, V. A. Mazurok, A. V. Berezina, A. E. Bautin, L. G. Vasilyeva, D. A. Aleksandrova
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Anesteziologiya i reanimatologiya.2023; (5): 44. CrossRef
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Review Article

Pulmonary
Home mechanical ventilation: back to basics: Sunghoon Park, Eui-Sik Suh; Acute Crit Care. 2020;35(3):131-141. Published online August 31, 2020; DOI: https://doi.org/10.4266/acc.2020.00514

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Abstract PDF

Over recent decades, the use of home mechanical ventilation (HMV) has steadily increased worldwide, with varying prevalence in different countries. The key indication for HMV is chronic respiratory failure with alveolar hypoventilation (e.g., neuromuscular and chest wall disease, obstructive airway diseases, and obesity-related respiratory failure). Most modern home ventilators are pressure-targeted and have sophisticated modes, alarms, and graphics, thereby facilitating optimization of the ventilator settings. However, different ventilators have different algorithms for tidal volume estimation and leak compensation, and there are also several different circuit configurations. Hence, a basic understanding of the fundamentals of HMV is of paramount importance to healthcare workers taking care of patients with HMV. When choosing a home ventilator, they should take into account many factors, including the current condition and prognosis of the primary disease, the patient’s daily performance status, time (hr/day) needed for ventilator support, family support, and financial costs. In this review, to help readers understand the basic concepts of HMV use, we describe the indications for HMV and the factors that influence successful delivery, including interface, circuits, ventilator accessories, and the ventilator itself.

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Adaptation of Caregivers of Individuals on Mechanical Ventilation to Caregiving Role
Tuba Yilmaz Bulut, İlknur Aydin Avci, Mesiya Aydin
Indian Journal of Critical Care Medicine.2023; 28(1): 41. CrossRef
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Anita Saigal, Amar J Shah, Swapna Mandal
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Treatment of acute respiratory failure: noninvasive mechanical ventilation
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Original Articles

Pulmonary
Clinical outcomes of difficult-to-wean patients with ventilator dependency at intensive care unit discharge: Jung Mo Lee, Sun-Min Lee, Joo Han Song, Young Sam Kim; Acute Crit Care. 2020;35(3):156-163. Published online August 19, 2020; DOI: https://doi.org/10.4266/acc.2020.00199

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Abstract PDF Supplementary Material

Background
Ventilator-dependent patients in the intensive care unit (ICU) who are difficult to wean from invasive mechanical ventilation (IMV) have been increasing in number. However, data on the clinical outcomes of difficult-to-wean patients are lacking. We aimed to evaluate clinical outcomes in patients discharged from the ICU with tracheostomy and ventilator dependency.
Methods
We retrospectively investigated clinical course and survival in patients requiring home mechanical ventilation (HMV) with a tracheostomy and difficulty weaning from IMV during medical ICU admission from September 2013 through August 2016 at Severance Hospital, Yonsei University, Seoul, Korea.
Results
Of 84 difficult-to-wean patients who were started on HMV in the medical ICU, 72 survived, were discharged from the ICU, and were included in this analysis. HMV was initiated after a median of 23 days of IMV, and the successful weaning rate was 46% (n=33). In-hospital mortality rate was significantly lower in the successfully weaned group than the unsuccessfully weaned group (0% vs. 23.1%, respectively; P=0.010). Weaning rates were similar according to primary diagnosis, but high body mass index (BMI), low Acute Physiologic Assessment and Chronic Health Evaluation (APACHE) II score at ICU admission, and absence of neuromuscular disease were associated with weaning success. After a median follow-up of 4.6 months (range, 1–27 months) for survivors, 3-month (n=64) and 6-month (n=59) survival rates were 82.5% and 72.2%, respectively. Survival rates were higher in the successfully weaned group than the unsuccessfully weaned group at 3 months (96.4% vs. 69.0%; P=0.017) and 6 months (84.0% vs. 62.1%; P=0.136) following ICU discharge.
Conclusions
In summary, 46% of patients who started HMV were successfully weaned from the ventilator in general wards. High BMI, low APACHE II score, and absence of neuromuscular disease were factors associated with weaning success.

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Long-Term Mortality in Critically Ill Tracheostomized Patients Based on Home Mechanical Ventilation at Discharge
Won-Young Kim, Moon Seong Baek
Journal of Personalized Medicine.2021; 11(12): 1257. CrossRef
Year 2020 in review - Post‑acute intensive care
J Djakow
Anesteziologie a intenzivní medicína.2020; 31(6): 305. CrossRef

Pulmonary
Clinical Application of Modified Burns Wean Assessment Program Scores at First Spontaneous Breathing Trial in Weaning Patients from Mechanical Ventilation: Eun Suk Jeong, Kwangha Lee; Acute Crit Care. 2018;33(4):260-268. Published online November 30, 2018; DOI: https://doi.org/10.4266/acc.2018.00276

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Abstract PDF

Background
The purpose of this study was to evaluate the clinical application of modified Burns Wean Assessment Program (m-BWAP) scoring at first spontaneous breathing trial (SBT) as a predictor of successful liberation from mechanical ventilation (MV) in patients with endotracheal intubation.
Methods
Patients requiring MV for more than 72 hours and undergoing more than one SBT in a medical intensive care unit (ICU) were prospectively enrolled over a 3-year period. The m-BWAP score at first SBT was obtained by a critical care nursing practitioner.
Results
A total of 103 subjects were included in this study. Their median age was 69 years (range, 22 to 87 years) and 72 subjects (69.9%) were male. The median duration from admission to first SBT was 5 days (range, 3 to 26 days), and the rate of final successful liberation from MV was 84.5% (n=87). In the total group of patients, the successful liberation from MV group at first SBT (n=65) had significantly higher m-BWAP scores than did the unsuccessful group (median, 60; range, 43 to 80 vs. median, 53; range, 33 to 70; P<0.001). Also, the area under the m-BWAP curve for predicting successful liberation of MV was 0.748 (95% confidence interval, 0.650 to 0.847), while the cutoff value based on Youden’s index was 53 (sensitivity, 76%; specificity, 64%).
Conclusions
The present data show that the m-BWAP score represents a good predictor of weaning success in patients with an endotracheal tube in place at first SBT.

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André Filipe Ribeiro, Sandra Martins Pereira, Rui Nunes, Pablo Hernández-Marrero
Palliative and Supportive Care.2023; 21(4): 741. CrossRef
Effect of a Japanese Version of the Burns Wean Assessment Program e-Learning Materials on Ventilator Withdrawal for Intensive Care Unit Nurses
Rika KIMURA, Naoko HAYASHI, Akemi UTSUNOMIYA
Journal of Nursing Research.2023; 31(4): e287. CrossRef
Value of modified Burns Wean Assessment Program scores in the respiratory intensive care unit: An Egyptian study
Nermeen A. Abdelaleem, Sherif A.A. Mohamed, Azza S. Abd ElHafeez, Hassan A. Bayoumi
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Acute and Critical Care.2019; 34(1): 60. CrossRef

Infection
High-dose Sulbactam Treatment for Ventilator-Associated Pneumonia Caused by Carbapenem-Resistant Acinetobacter Baumannii: In Beom Jeong, Moon Jun Na, Ji Woong Son, Do Yeon Jo, Sun Jung Kwon; Korean J Crit Care Med. 2016;31(4):308-316. Published online November 30, 2016; DOI: https://doi.org/10.4266/kjccm.2015.00703

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Abstract PDF

Background
Several antibiotics can be used to treat ventilator-associated pneumonia caused by carbapenem-resistant A. baumannii (CRAB-VAP) including high-dose sulbactam. However, the effectiveness of high-dose sulbactam therapy is not well known. We report our experience with high-dose sulbactam for treatment of CRAB-VAP.
Methods
Medical records of patients with CRAB-VAP who were given high-dose sulbactam between May 2013 and June 2015 were reviewed.
Results
Fifty-eight patients with CRAB-VAP were treated with high-dose sulbactam. The mean age was 72.0 ± 15.2 years, and the acute physiology and chronic health evaluation II (APACHE II) score was 15.1 ± 5.10 at the time of CRAB-VAP diagnosis. Early clinical improvement was observed in 65.5% of patients, and 30-day mortality was 29.3%. Early clinical failure (odds ratio [OR]: 8.720, confidence interval [CI]: 1.346-56.484; p = 0.023) and APACHE II score ≥ 14 at CRAB-VAP diagnosis (OR: 10.934, CI: 1.047-114.148; p = 0.046) were associated with 30-day mortality.
Conclusions
High-dose sulbactam therapy may be effective for the treatment of CRAB-VAP. However, early clinical failure was observed in 35% of patients and was associated with poor outcome.

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A Randomized Controlled Trial of Colistin Combined with Sulbactam: 9 g per Day versus 12 g per Day in the Treatment of Extensively Drug-Resistant Acinetobacter baumannii Pneumonia: An Interim Analysis
Chutchawan Ungthammakhun, Vasin Vasikasin, Dhitiwat Changpradub
Antibiotics.2022; 11(8): 1112. CrossRef
Meropenem/colistin versus meropenem/ampicillin–sulbactam in the treatment of carbapenem-resistant pneumonia
Hossein Khalili, Lida Shojaei, Mostafa Mohammadi, Mohammad-Taghi Beigmohammadi, Alireza Abdollahi, Mahsa Doomanlou
Journal of Comparative Effectiveness Research.2018; 7(9): 901. CrossRef

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