Category Archives: Original Research

Inhaled sevoflurane in critically ill COVID-19 patients: A retrospective cohort study

Jose J. Zaragoza1, Marco A. Baez-Garcia2,3, Jose M. Lomeli-Teran2,4, Daniela Anzures-Diaz2, Paola Zamudio-Cantellano2,4, Job H. Rodriguez-Guillen2,4

1 Hospital H+ Queretaro, Santiago de Querétaro, Mexico
2 Critical Care Department, Hospital H+ Queretaro, Queretaro, Mexico
3 Universidad Anahuac Queretaro, Queretaro, Mexico
4 Colegio Mexicano de Medicina Crítica, Benito Juárez, Mexico

DOI: 10.2478/jccm-2026-0011

Background: Managing sedation in critically ill COVID-19 patients is challenging due to high sedative requirements and organ dysfunction that alters drug metabolism. Inhaled sevoflurane offers a lung-eliminated alternative that may mitigate drug accumulation.
Methods: This single-center, retrospective cohort study analyzed 43 mechanically ventilated COVID-19 patients (March–November 2020). Patients received inhaled sevoflurane adjunctive to IV sedation (n=30) or IV sedation alone (n=13). The primary outcome was the cumulative dose of IV sedatives over 7 days. Secondary outcomes included time to extubation and antipsychotic use.
Results: There was no significant difference in the cumulative dose of IV sedatives between groups. However, the sevoflurane group had a significantly longer median duration of mechanical ventilation (206 [IQR 144-356] vs 144 [IQR 115-156] hours, p=0.005) and a higher requirement for antipsychotic medication (66.6% vs 15.3%, OR 18.6, p=0.011). Daily doses of propofol were lower in the sevoflurane group on specific days, but overall burden was unchanged.
Conclusions: In this cohort, adjunctive inhaled sevoflurane did not significantly reduce the cumulative burden of IV sedatives and was associated with delayed extubation and increased antipsychotic use. While sevoflurane is a feasible alternative, these findings suggest caution regarding weaning and delirium management in COVID-19 patients.

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Admission biomarkers and COVID-19 mortality: A retrospective study during Vietnam’s pandemic peak

Uyen Thi Bich Nguyen1, Hau Phuc Le2,3, Vu Hoang Anh Nguyen4, Ai-Thanh Tran-Nguyen4,5

1 Department of Nephrology and Hemodialysis, Le Van Viet Hospital, Ho Chi Minh City, Vietnam
2 Outpatient Clinic for HIV-AIDS Patients, Chau Thanh District Medical Center, Tra Vinh Province, Vietnam
3 Can Tho University of Medicine and Pharmacy, Can Tho, Vietnam
4 Department of Psychosomatic Medicine, Thu Duc City Hospital, Ho Chi Minh City, Vietnam
5 Thu Duc City Hospital, Ho Chi Minh City, Vietnam

DOI: 10.2478/jccm-2026-0012

Background: This study aimed to evaluate the prognostic value of key admission biomarkers in predicting mortality among hospitalized COVID-19 patients and to establish optimal cut-off thresholds for clinical decision-making.
Methods: Retrospective cohort study included 269 COVID-19 patients treated at Thu Duc City Hospital, Vietnam, during the peak of the fourth pandemic wave in 2021. Logistic regression identified independent predictors of mortality, and receiver operating characteristic (ROC) curve analysis assessed the diagnostic performance of biomarkers. The area under the ROC curve (AUROC), Sensitivity, Specificity and Accuracy Index were used to determine optimal cut-off values.
Results: Among the 269 patients, 53 (19.7%) died and 216 (80.3%) survived. Non-survivors exhibited elevated D-dimer (4.48 μg/mL vs 0.93 μg/mL, p < 0.0001), neutrophil counts (6.8 × 10⁹/L vs 3.5 × 10⁹/L, p < 0.0001) and white blood cell counts (11.68 × 10⁹/L vs. 7.87 × 10⁹/L, p < 0.0001). Lymphocyte counts and fibrinogen levels were significantly lower in non-survivors (p < 0.05). Logistic regression identified D-dimer (OR = 1.05, 95% CI: 1.02–1.09, p = 0.001), neutrophil counts (OR = 1.32, 95% CI: 1.10–1.63, p = 0.005) and lymphocyte counts (OR = 0.51, 95% CI: 0.26–0.92, p = 0.033) as significant predictors of mortality. ROC analysis revealed that D-dimer (AUROC = 0.809) and neutrophil counts (AUROC = 0.726) demonstrated strong discriminatory power, with cut-off values of ≥1.126 μg/mL (sensitivity = 90.57%, specificity = 60.19%) and ≥6.715 × 10⁹/L (sensitivity = 52.83%, specificity = 82.87%), respectively.
Conclusion: These findings support the use of admission biomarkers to guide early interventions and improve patient outcomes in severe COVID-19 cases. Further studies are warranted to validate these results and explore their applicability in other settings.

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Impaired peripheral mononuclear cell metabolism in patients at risk of developing sepsis: A cohort study

Velma Herwanto1,2, Ya Wang2, Maryam Shojaei2, Alamgir Khan3, Kevin Lai4, Amith Shetty4, Stephen Huang2, Tracy Chew5, Sally Teoh2, Marek Nalos2, Mandira Chakraborty2, Anthony S McLean2, Benjamin M P Tang2

1 Universitas Tarumanagara, Faculty of Medicine, Jakarta, Indonesia
2 Department of Intensive Care Medicine, Nepean Hospital, Kingswood, NSW, Australia
3 Australian Proteome Analysis Facility, Macquarie University, NSW, Australia
4 Department of Emergency Medicine, Westmead Hospital, NSW, Australia
5 Sydney Informatics Hub, The University of Sydney, NSW, Australia

DOI: 10.2478/jccm-2026-0010

Introduction: Dysregulated immune responses are central to progression of sepsis and closely associated with impaired cellular metabolism. However, most existing studies have focused on late-stage sepsis, leaving metabolic alterations during earlier stages of infection poorly characterised. This study aimed to determine whether immune cell metabolic impairment is already present during uncomplicated infection, prior to the development of sepsis, and to evaluate its potential as an early indicator of immune dysfunction and risk of progression.
Materials and methods: Forty patients with sepsis (fulfilling Sepsis-3 criteria) and 27 patients with uncomplicated infection were recruited from the emergency department along with 20 healthy volunteers. Whole blood samples were collected to assess gene expression, cytokine levels, and cellular metabolic functions, including mitochondrial respiration, oxidative stress, and apoptosis in immune cells.
Results: Mitochondrial respiration was significantly impaired in immune cells from both uncomplicated infection and sepsis patients compared with healthy controls (p < 0.05), with more pronounced impairment in established sepsis. Downregulation of BCL2 and BBC3 gene expression was observed in sepsis patients (p < 0.05), but not in uncomplicated infection, potentially contributing to differences in the severity of metabolic impairment. Impaired mitochondrial respiration was significantly associated with increased mitochondrial oxidative stress (p < 0.05), which was elevated in uncomplicated infection and further increased in sepsis. Oxidative stress levels also correlated with tumour necrosis factor-α (r = 0.330) and the expression of CYCS, TP53, SLC25A24, and TSPO (rs = −0.4926, −0.4422, 0.4382, and 0.4835, respectively). Despite these metabolic alterations, no significant differences in immune cell apoptosis were observed between uncomplicated infection and sepsis patients.
Conclusions: Immune cell metabolic dysfunction is present in patients with uncomplicated infection before the clinical onset of sepsis. Early mitochondrial dysfunction and oxidative stress may represent promising targets for further investigation as early biomarkers of immune dysfunction and sepsis risk.

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Real-world clinical decision of andexanet alfa administration for intracranial hemorrhage during anticoagulant therapy using factor Xa inhibitor

Shigeo Yamashiro1, Keisuke Harada1, Shunsuke Izumi1, Yusuke Morikawa1, Tomoko Ikemoto1, Koki Kameno1, Tomoaki Goto1, Yuki Ohmori1, Masatomo Kaji1, Akitake Mukasa2

1 Division of Neurosurgery, Department of Cerebrovascular Medicine and Surgery, Saiseikai Kumamoto Hospital, Kumamoto, Japan
2 Department of Neurosurgery, Faculty of Life Sciences, Kumamoto University, Kumamoto Japan

DOI: 10.2478/jccm-2025-0046

Introduction: Andexanet alfa shows excellent hemostatic efficacy in treating intracranial hemorrhage (ICH) during Xa inhibitor therapy. However, its optimal use remains uncertain.
Aim of the study: This study aims to evaluate our clinical experience in managing Xa inhibitor-related ICH to clarify its appropriate application.
Material and methods: This study was conducted as an observational, non-interventional study. We observed 63 cases of ICH in patients receiving anticoagulation therapy with apixaban, rivaroxaban, or edoxaban. After excluding 14 patients due to fatal outcomes or complete hemostasis, 49 patients were eligible for andexanet alfa administration.
Results: The mean age and hematoma volume was 78 years and the 35ml, respectively. Based on patient characteristics and severity, andexanet alfa was administered to 23 patients, while 26 patients received usual care. Hemorrhage enlargement was absent in 22 cases (92.8%) in the andexanet group and in 22 cases (84.6%) in the usual care group. Hemorrhage expansion occurred in three cases from the usual care group, one patient undergoing emergency surgery and another died from uncontrollable intraoperative bleeding. Two patients (8.7%) in the andexanet group experienced thromboembolic events as adverse reactions. At 3 months, the modified Rankin Scale (mRS) was 3 or lower in 39% of the andexanet group and 50% of the standard care group.
Conclusions: Although patient selection bias make it difficult to draw definitive conclusions, we recommend considering andexanet alfa administration for cases within several hours of the last Xa inhibitor dose to prevent neurological deterioration. Emergency surgical cases should also be eligible for andexanet alfa to ensure intraoperative safety. Further research is required to determine clinically appropriate indications for its use.

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Pharmacokinetic-guided magnesium prophylaxis in cardiac surgery: A randomized trial demonstrating guideline-level reductions in atrial fibrillation, accelerated recovery, and systemic cost savings

Sarah Hamdy Elghareeb, Islam Taher, Ahmed Abd Al Ghany, Noha Mohamed Abdelaziz

Ain Shams University Faculty of Medicine, Cairo, Egypt

DOI: 10.2478/jccm-2026-0001

Objective: To evaluate the efficacy, safety, and cost-effectiveness of a perioperative magnesium (Mg) sulfate protocol in reducing postoperative atrial fibrillation (AF) incidence and ICU resource strain following cardiac surgery.
Methods: Design: Double-blind, single-center randomized controlled trial (RCT). Setting: Tertiary-care academic hospital. Participants: 130 adults undergoing elective cardiac surgery, randomized to Mg sulfate (n=65) or placebo (n=65). Interventions: The Mg group received a pharmacokinetic-guided regimen: 2 g intravenous bolus post-cardiopulmonary bypass, followed by 1 g/h infusion for 5 hours, then 200 mg/h for 19 hours, and oral supplementation (I g every 8 hours) for one week post-discharge. The placebo group received equivalent saline infusions and oral placebo.
Results: Primary outcome: AF incidence was 18.5% in the Mg group vs. 41.5% in placebo (unadjusted RR=0.45, 95% CI: 0.25–0.81; p=0.007). Secondary outcomes: Mg shortened ICU stay by 1.4 days (p<0.001), reduced mechanical ventilation duration by 3.2 hours (p<0.001), and demonstrated comparable safety profiles for hypotension and renal impairment. Subgroup analysis: CABG patients showed 65% risk reduction (OR=0.35, p=0.01). Cost-effectiveness: ICU stay reduction projected $3,500 savings per patient.
Conclusions: Perioperative Mg sulfate significantly reduces AF incidence, accelerates recovery, and lowers healthcare costs, supporting its integration into standardized postoperative protocols. This trial provides Level I evidence for Mg as a guideline-recommended intervention. These findings are promising and support the integration of Mg into standardized postoperative protocols; however, they require confirmation in larger, multicenter studies.

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Epidemiological insights into carbapenem resistant infections in critical care settings: A molecular and clinical investigation

Camelia Vintila1, Razvan Lucian Coseriu1, Alexandru Andrei Ujlaki Nagi2, Adrian Man1

1 George Emil Palade University of Medicine, Pharmacy, Science, and Technology of Targu Mures, Romania
2 Mures County Clinical Hospital, Targu Mures, Romania

DOI: 10.2478/jccm-2025-0048

Objective: This study aimed to investigate the prevalence and genetic relatedness of multidrug-resistant Gram-negative bacilli, particularly those resistant to carbapenems, in patients admitted to intensive care units. It also sought to explore associations between bacterial colonization or infection and clinical outcomes, including comorbidities, treatment regimens, and mortality.
Methods: Between November 2022 and December 2023, screening and pathological samples were collected from patients at a tertiary hospital. Screening samples included rectal and pharyngeal swabs, while pathological samples comprised respiratory tract secretions. Bacterial identification and antibiotic susceptibility testing were performed using standard microbiological methods. Genetic similarity among isolates was assessed using a molecular fingerprinting technique to detect potential clonal spread.
Results: A total of 62 carbapenem-resistant strains were identified, with Acinetobacter baumannii and Klebsiella pneumoniae being the most prevalent. Pathological isolates exhibited higher resistance levels than screening isolates. Most patients had multiple comorbidities, with cardiac, renal, and pulmonary conditions being the most common. A significant association was found between prolonged intensive care unit stay and increased mortality. However, no significant correlation was observed between the number of comorbidities or antibiotic classes used and mortality. Molecular analysis revealed clonal clusters of Acinetobacter and Klebsiella strains, suggesting nosocomial transmission.
Conclusions: The findings underscore the importance of early screening, molecular surveillance, and stringent infection control measures in intensive care settings.

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Incidence rate of post-intensive care syndrome-family in Japan: A post-hoc analysis of a prospective observational study

Akihiro Takaba1, Masaaki Sakuraya1, Daisuke Kawakami2, Shigeki Fujitani3

1 JA Hiroshima Koseiren Hiroshima General Hospital, Hiroshima, Japan
2 Iizuka Hospital, Iizuka, Japan
3 St Marianna University School of Medicine, Kawasaki, Japan

DOI: 10.2478/jccm-2025-0042

Background: Family members in intensive care units (ICUs) may develop post-intensive care syndrome-family (PICS-F), characterized by psychiatric disorders such as anxiety, depression, and post-traumatic stress disorders (PTSD). A previous study reported that approximately 13% of patient families in Japan develop PICS-F symptoms six months following ICU discharge, which is lower compared to other countries. However, this figure may be underestimated by administrative claims data in Japan. Although clinical guidelines recommend interventions to prevent PICS-F, the implementation rate of these interventions in Japan remains unclear. This study addresses the epidemiology of PICS-F among family members of ICU survivors and the implementation of interventions for preventing PICS-F in Japan.
Methods: A post-hoc analysis of a prospective multicenter cohort study was conducted, focusing on mechanically ventilated ICU survivors and their closest relatives. This study covered 16 ICUs in 14 hospitals between April 2019 and September 2020, using questionnaires to assess the PICS-F symptoms among relatives using the Hospital Anxiety (HADS-A) and Depression (HADS-D) Scale and the Impact of Event Scale-Revised (IES-R). The implementation rate of interventions to prevent PICS-F was also evaluated.
Results: Of the 151 surveyed relatives, 104 relatives were assessed after 6 months. Notably, PICS-F was identified among 45.2% of relatives, with depression (36.5%), anxiety (31.7%), and PTSD (24.0%). Relatives with PICS-F were less likely to maintain their original employment compared to those without (61.3% vs 85.3%, P=0.047). While 63.5% of relatives received at least one preventive intervention during the ICU stay, more than one-third received none.
Conclusions: The incidence of PICS-F in Japan is higher than previously reported, affecting nearly half of patient relatives. Moreover, the implementation rate of interventions to prevent PICS-F is low. These findings suggest the need for reinforced socioeconomic support.

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Complication patterns and postoperative outcomes in surgical patients admitted to intensive care units

Caroline Tolentino Sanches, Silvia Paulino Ribeiro Albanese, Monique Elen Robuste, Gabriela Gomes da Silva, Marcos Toshiyuki Tanita, Cintia Grion

Universidade Estadual de Londrina, Londrina, Brazil

DOI: 10.2478/jccm-2025-0044

Objective: To analyze the frequency and types of postoperative complications and risk factors for in-hospital mortality.
Methods: This retrospective longitudinal study included adult patients who underwent surgical procedures and were admitted to the intensive care unit of a university hospital between March and July 2022. Study variables included sociodemographic, clinical, and epidemiological data; postoperative complications and hospital outcomes. The significance level was set at 5%.
Results: We analyzed 202 patients, with a median age of 67 years (IQR 55–74) and a predominance of males (62.4%). Inhospital mortality was 26.2%. Postoperative complications occurred in 84.7% of patients, with cardiovascular (53.4%), infectious (49.5%), and gastrointestinal (48.5%) complications being the most frequent. Early postoperative feeding was initiated in 34.2% of cases, and a delay was associated with a higher risk of complications. Nausea and vomiting prophylaxis were administered to most patients—intraoperatively in 61.9% and postoperatively in 96%. In logistic regression analysis, female sex, urgent surgery, and higher SAPS 3 scores were identified as independent risk factors for death.
Conclusions: Postoperative complications were highly prevalent and associated with an increased risk of death. Intraoperative nausea and vomiting prophylaxis and early postoperative feeding were associated with a lower frequency of complications. Identified risk factors for mortality included female sex, higher SAPS 3 scores, and urgent surgeries.

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Evaluation of PRVC and SIMV ventilation techniques on hemodynamic metrics and arterial blood gases in ICU patients with multiple trauma: A randomized, triple-blind study

Majid Vatankhah Tarbebar1, Saeed Kashani1, Fatemeh Darsareh1, Tayyebeh Zarei1, Bibi Mona Razavi1, Latifeh Farzanfar2, Mehrdad Sayadinia1, Pourya Adibi1, Mansour Shabani1, Mehrdad Malekshoar1, Milad Mohammadi1

1 Anesthesiology, Critical Care and Pain Management Research Center, Hormozgan University of Medical Sciences, Bandar Abbas, Iran
2 Student Research Committee, Faculty of Nursing and Midwifery, Hormozgan University of Medical Sciences, Bandar Abbas, Iran

DOI: 10.2478/jccm-2025-0043

Background: In the Intensive Care Unit (ICU), mechanical ventilation is frequently employed to assist critically injured patients with breathing. The two conventional methods are SIMV and PRVC. This research sought to evaluate these techniques, particularly concerning patient stability and the preservation of optimal blood gas levels.
Methods: We carried out a parallel-group, randomized, triple-blind clinical trial. One hundred two patients with multiple traumas admitted to the ICU were randomly allocated to either the SIMV group or the PRVC mode group. The main outcome was measured through blood hemodynamic parameters, blood pressure, and heart rate in mechanically ventilated patients with multiple traumas. The secondary outcome measured was the composition of arterial blood gases (pH, PaCO2, PaO2, HCO3, and SpO2).
Result: The average age in the SIMV and PRVC groups was 38.53±16.29 and 38.04±15.26 years, respectively, showing no statistical significance. Arterial blood gas parameters, including arterial blood pH, PaCO2, PaO2, HCO3, and SpO2, were similar in the SIMV and PRVC groups at the beginning of admission and 8 and 12 hours after admission, and there was no significant difference. Comparing vital signs including blood pressure (systolic, diastolic, and mean arterial pressure) and heart rate was similar in the SIMV and PRVC groups at the beginning of admission and 8 and 12 hours after admission.
Conclusion: No significant justification was identified to favor one approach over the other for trauma patients receiving ventilatory support. Both groups stayed consistent regarding vital signs and other health indicators.

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Nurses’ attitudes and knowledge about organ donation and transplantation in closed hospital wards

Anastasios Tzenalis1, Elpida Kontesidou2, George Kipourgos3, Evangelia Andreopoulou3, Angelikh Gkotsi3, Eleni Albani1

1 University of Patras, Patra, Greece
2 General Hospital Papageorgiou, Thessaloniki, Greece
3 University General Hospital of Patras, Patra, Greece

DOI: 10.2478/jccm-2025-0041

Objective: Nurses in closed hospital wards, such as Intensive Care and isolation units, play a pivotal role in identifying potential donors and supporting families during sensitive decision-making moments. However, gaps in knowledge or negative attitudes among nurses can hinder donation efforts. This study aims to explore the knowledge and attitudes of closed-ward nurses regarding organ donation and transplantation, providing insights to enhance education, advocacy, and clinical practices in these critical settings.
Methods: Modern analysis was performed on the data collected from questionnaires distributed to nurses of … General Hospital. The study involved 108 nurses. The questionnaire used to collect the data was provided by the Department of Social Work of the … University and distributed in electronic form to hospital nurses.
Results: After analyzing the nurses’ responses, it emerged that 85.19% of nurses are positive about the idea of organ donation and declare themselves willing to become donors, motivated by their will to really help their fellow human beings. In contrast, 5.56% said they would not be willing to donate. The main cause of their refusal seems to be fear and the prejudices they have, but also the fact that there is no trust in the organizations responsible for transplants. Finally, regarding the knowledge of the nurses who participated in the survey, the average knowledge score on the scale 0-100 is 72.
Conclusions: There is a clear need for specialized training for nurses managing organ donation. The emotional burden and responsibilities they face are significant. Enhanced training supports their well-being and ensures a more compassionate, efficient process for donors and families, ultimately improving the experience for all involved.

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