Acute and Critical Care

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.

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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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

Citations to this article as recorded by

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

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.

Citations

Citations to this article as recorded by

Nusinersen for Spinal Muscular Atrophy Type I with Chronic Respiratory Failure: A Retrospective Study in South Korea
Hui Jin Shin, Ji-Hoon Na, Hyunjoo Lee, Young-Mock Lee
Yonsei Medical Journal.2023; 64(12): 705. CrossRef
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
Indications and evidence for domiciliary noninvasive ventilation
Anita Saigal, Amar J Shah, Swapna Mandal
Expert Review of Respiratory Medicine.2023; 17(12): 1141. CrossRef
Treatment of acute respiratory failure: noninvasive mechanical ventilation
Sunghoon Park
Journal of the Korean Medical Association.2022; 65(3): 144. CrossRef
Mental health reported in adult invasive home mechanical ventilation through a tracheostomy: A scoping review
Martin Locht Pedersen, Charlotte Handberg, Pia Dreyer
International Journal of Nursing Studies Advances.2022; 4: 100110. CrossRef

Original Article

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.

Citations

Citations to this article as recorded by

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

Guideline

Pulmonary
Clinical Practice Guideline of Acute Respiratory Distress Syndrome: Young-Jae Cho, Jae Young Moon, Ein-Soon Shin, Je Hyeong Kim, Hoon Jung, So Young Park, Ho Cheol Kim, Yun Su Sim, Chin Kook Rhee, Jaemin Lim, Seok Jeong Lee, Won-Yeon Lee, Hyun Jeong Lee, Sang Hyun Kwak, Eun Kyeong Kang, Kyung Soo Chung, Won-Il Choi, The Korean Society of Critical Care Medicine and the Korean Academy of Tuberculosis and Respiratory Diseases Consensus Group; Korean J Crit Care Med. 2016;31(2):76-100. Published online May 31, 2016; DOI: https://doi.org/10.4266/kjccm.2016.31.2.76

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Abstract PDF

There is no well-stated practical guideline for mechanically ventilated patients with or without acute respiratory distress syndrome (ARDS). We generate strong (1) and weak (2) grade of recommendations based on high (A), moderate (B) and low (C) grade in the quality of evidence. In patients with ARDS, we recommend low tidal volume ventilation (1A) and prone position if it is not contraindicated (1B) to reduce their mortality. However, we did not support high-frequency oscillatory ventilation (1B) and inhaled nitric oxide (1A) as a standard treatment. We also suggest high positive end-expiratory pressure (2B), extracorporeal membrane oxygenation as a rescue therapy (2C), and neuromuscular blockage for 48 hours after starting mechanical ventilation (2B). The application of recruitment maneuver may reduce mortality (2B), however, the use of systemic steroids cannot reduce mortality (2B). In mechanically ventilated patients, we recommend light sedation (1B) and low tidal volume even without ARDS (1B) and suggest lung protective ventilation strategy during the operation to lower the incidence of lung complications including ARDS (2B). Early tracheostomy in mechanically ventilated patients can be performed only in limited patients (2A). In conclusion, of 12 recommendations, nine were in the management of ARDS, and three for mechanically ventilated patients.

Citations

Citations to this article as recorded by

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
Predicting factors associated with prolonged intensive care unit stay of patients with COVID-19
Won Ho Han, Jae Hoon Lee, June Young Chun, Young Ju Choi, Youseok Kim, Mira Han, Jee Hee Kim
Acute and Critical Care.2023; 38(1): 41. CrossRef
Treatment of acute respiratory failure: invasive mechanical ventilation
Young Sam Kim
Journal of the Korean Medical Association.2022; 65(3): 151. CrossRef
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
Prolonged glucocorticoid treatment in acute respiratory distress syndrome – Authors' reply
Rob Mac Sweeney, Daniel F McAuley
The Lancet.2017; 389(10078): 1516. CrossRef
Prolonged Glucocorticoid Treatment in ARDS: Impact on Intensive Care Unit-Acquired Weakness
Gianfranco Umberto Meduri, Andreas Schwingshackl, Greet Hermans
Frontiers in Pediatrics.2016;[Epub] CrossRef

Original Article

Clinical Characteristics and Prognosis of Patients with Intracranial Hemorrhage during Mechanical Ventilation: Go Woon Kim, Jin Won Huh, Younsuck Koh, Chae Man Lim, Sang Bum Hong; Korean J Crit Care Med. 2012;27(2):94-101.; DOI: https://doi.org/10.4266/kjccm.2012.27.2.94

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Abstract PDF: BACKGROUND
Intracranial hemorrhage is a serious disease associated with high mortality and morbidity, and develops suddenly without warning. Although there were known risk factors, it is difficult to prevent brain hemorrhage from critically ill patients in the intensive care unit (ICU). There are several reports that brain hemorrhage, in critically ill patients, occurred in connection with respiratory diseases. The aim of our study is to describe the baseline characteristics and prognosis of patients with intracranial hemorrhage during mechanical ventilation in the ICU.
METHODS
We retrospectively reviewed the medical records of 56 patients, who developed intracranial hemorrhage in a medical ICU, from May 2008 to December 2011. During the mechanical ventilation in the ICU, patients were implemented with a weaning process, following ACCP (American College of Chest Physicians) criteria. Also, we compared patients with brain hemorrhage to those without brain hemorrhage.
RESULTS
Thirty two of the 56 patients (57.1%) were male, and median ages were 63 (17-90) years. The common type of brain hemorrhage confirmed was intracerebral hemorrhage/intraventricular hemorrhage (52.2%). The duration from mechanical ventilation to brain hemorrhage was 6 (0-58) days. Overall hospital mortality was 57.1%, and ICU mortality was 44.6%. The most common cause of death was brain hemorrhage (40.6%). In comparison to patients without brain hemorrhage, study patients showed less use of anticoagulants and lower ventilator pressure. Our study showed that the use of vasopressor, systolic blood pressure, peak airway pressure, and platelet count were associated with brain hemorrhage.
CONCLUSIONS
Intracranial hemorrhage showed high mortality in critically ill patients with mechanical ventilation. In the future, large case-control study will be needed to evaluate the risk factors of cerebral hemorrhage.

Case Report

Successful Recovery after Drowning by Early Prone Ventilatory Positioning and Use of Nitric Oxide Gas: A Case Report: Joo Myung Lee, Jae Ho Lee, Choon Taek Lee, Young Jae Cho; Korean J Crit Care Med. 2011;26(3):196-199.; DOI: https://doi.org/10.4266/kjccm.2011.26.3.196

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Abstract PDF: Drowning is the third leading cause of unintentional accidental death globally. The most serious pathophysiologic consequence of drowning is hypoxemia from acute respiratory distress syndrome. Herein, we report a drowning victim who presented with hypothermia and cardiac arrest, followed by acute respiratory distress syndrome, rhabdomyolysis (with acute kidney injury), and disseminated intravascular coagulopathy. Aided by advanced cardiac life support and mechanical ventilation in a prone position, the patient fully recovered after two days of hospitalization. Recovery was largely attributed to early prone ventilatory positioning and use of nitric oxide gas.

Original Article

Analysis of the Description of Ventilator Parameters in Recent Papers Relating Artificial Ventilation Using Anesthesia Machine: Jiyeon Sim, Hee Yeon Park, Wonsik Ahn; Korean J Crit Care Med. 2007;22(1):7-14.

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Abstract PDF: BACKGROUND
Procedures in medical papers should be described in sufficient detail to allow other researchers to reproduce the results. The apparatus including anesthesia machine should be given, too. Anesthesia machine has dramatically improved as bioengineering has developed. There are several ventilator settings in modern anesthesia machines. However, it seems that only a few ventilator settings are described even though modern ventilators are used in research. The purpose of this study is to investigate that how many ventilator parameters were described in the papers of the Korean Journal of Anesthesiology from 2001 to 2006. METHODS: All of papers with human general anesthesia were reviewed except case reports, and papers regarding only induction or intubation procedures. Recruited articles were grouped into papers with strongly related to respiratory parameters (STP), and into ones with slightly related to them based on the research topics. The description of following categories was counted in each paper; the type of anesthesia machine, tidal volume, respiratory rate, inspiratory:expiratory ratio, mode of ventilation, pressure set in pressure targeted ventilation, positive end expiratory pressure, inspiratory pause, and inspiratory rising rate. RESULTS: The description rate of each parameters in STP were 36% in the type of anesthesia machine, 66% in tidal volume, 54% in respiratory rate, and 24% in inspiratory:expiratory ratio. The other settings were seldomly mentioned. CONCLUSIONS: Description on the ventilator parameters was sometimes missed. We should describe adequate ventilator settings to reproduce the results because the modern anesthesia machine has additional ventilator options.

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