Daily Ards Research Analysis
A large propensity score–matched cohort from MIMIC-IV suggests magnesium sulphate administration is associated with reduced in-hospital and 30-day ICU mortality in ARDS. A pilot randomized trial of real-time mechanical power monitoring during ventilation was feasible but did not reduce mechanical power versus standard care, with elevated power more common on night shifts. A COVID-19 surgical cohort identified traditional comorbidities as mortality risks and reported postoperative ARDS in 5.6% of
Summary
A large propensity score–matched cohort from MIMIC-IV suggests magnesium sulphate administration is associated with reduced in-hospital and 30-day ICU mortality in ARDS. A pilot randomized trial of real-time mechanical power monitoring during ventilation was feasible but did not reduce mechanical power versus standard care, with elevated power more common on night shifts. A COVID-19 surgical cohort identified traditional comorbidities as mortality risks and reported postoperative ARDS in 5.6% of cases.
Research Themes
- Adjunctive pharmacotherapy in ARDS
- Ventilation strategy and mechanical power
- Perioperative outcomes in COVID-19
Selected Articles
1. Association of magnesium sulphate use with mortality in patients with acute respiratory distress syndrome: a retrospective propensity score-matched cohort study.
Using MIMIC-IV data, magnesium sulphate administration during ICU stay was associated with significantly lower in-hospital mortality (HR 0.71) and 30-day ICU mortality (HR 0.75) among ARDS patients after propensity score matching. Results were consistent in multivariable and sensitivity analyses across the entire cohort.
Impact: Identifies a readily available, low-cost agent with a potential survival benefit in ARDS, warranting randomized trials. Large real-world data with robust matching strengthens the signal.
Clinical Implications: Consider protocolized assessment and repletion of magnesium in ARDS while awaiting RCT evidence; monitor for hypermagnesemia and neuromuscular effects. Findings justify designing stratified RCTs to test magnesium as an adjunctive therapy.
Key Findings
- After 1:1 propensity score matching (n=1,282), in-hospital mortality was lower with magnesium sulphate (32.29% vs 37.44%; HR 0.71, 95% CI 0.59–0.85; P<0.001).
- ICU 30-day mortality was reduced with magnesium (HR 0.75, 95% CI 0.62–0.90; P=0.002).
- In the full cohort (n=5,499), multivariable (HR 0.67) and univariable sensitivity analyses (HR 0.41) supported lower in-hospital mortality with magnesium use.
Methodological Strengths
- Large ICU database (MIMIC-IV) with adequate sample size and event rates
- Robust confounding control using 1:1 propensity score matching and multivariable/sensitivity analyses
Limitations
- Retrospective observational design with potential residual confounding and indication bias
- Limited details on dosing, timing, magnesium levels, and ARDS phenotypes; single database generalizability
Future Directions: Conduct multicenter RCTs stratified by ARDS subphenotypes and baseline magnesium levels to determine causal effects and optimal dosing/timing.
Few reports have documented magnesium supplementation effects on mortality rates of patients with acute respiratory distress syndrome (ARDS). This study investigated the potential correlation between magnesium sulphate use and mortality in patients with ARDS. Records of critically ill adult patients with ARDS from the Medical Information Mart in Intensive Care IV database were analysed. The exposure was magnesium sulphate administration during intensive care unit (ICU) stay. The primary outcome was in-hospital mortality. A 1:1 ratio propensity score matching (PSM) was performed; multivariable analyses were conducted to account for potential confounders. The study cohort comprised 5,499 patients before PSM and 1,282 patients after PSM. For PSM, the in-hospital mortality rates were 32.29% (207/641) and 37.44% (240/641) in the magnesium sulphate use and no-use groups, respectively. Magnesium sulphate use was associated with lower in-hospital mortality (hazard ratio [HR], 0.71; 95% confidence interval [CI], 0.59-0.85; P < 0.001) and lower ICU 30-day mortality (HR, 0.75; 95% CI, 0.62-0.90; P = 0.002). The entire cohort had lower in-hospital mortality in the multivariable (HR, 0.67; 95% CI, 0.57-0.78; P < 0.001) and univariable (HR, 0.41; 95% CI, 0.36-0.47; P < 0.001) sensitivity analyses. Magnesium sulphate use was associated with a lower in-hospital mortality rate for patients with ARDS.
2. Protective mechanical ventilation controlled by the real-time mechanical power measurement.
In a pilot RCT of adults with acute respiratory failure (some on ECMO), real-time mechanical power monitoring was feasible but did not reduce mechanical power compared with standard care, likely because both groups maintained low power. Elevated mechanical power was more frequent during night shifts.
Impact: Introduces an innovative real-time metric for ventilator-induced lung injury risk but shows no superiority over expert standard care, highlighting implementation and human-factor challenges.
Clinical Implications: Real-time mechanical power displays alone may not improve ventilation quality in experienced centers; consider staffing, training, and automated alerts, particularly during night shifts, to prevent inadvertent increases in mechanical power.
Key Findings
- Pilot RCT (n=33; including 7 ECMO patients) comparing visible versus concealed real-time mechanical power showed no significant between-group differences.
- Both groups maintained low mechanical power, suggesting a ceiling/floor effect with expert management.
- Night shift periods were identified as higher risk for elevated mechanical power and potential lung injury.
Methodological Strengths
- Randomized controlled design with trial registration (NCT06035146)
- Novel real-time mechanical power monitoring system using geometric and simplified Becher formulas
Limitations
- Small, single-center pilot with limited power to detect differences
- Open-label design; heterogeneous population (with and without ECMO); potential Hawthorne effect with display
Future Directions: Evaluate automated, closed-loop ventilation adjustments based on mechanical power in multicenter RCTs and target high-risk periods such as night shifts.
BACKGROUND: Despite the substantial advancements in mechanical ventilation (MV), mortality remains high. Mechanical power (MP), MV forces are associated with outcomes. Real-time monitoring of MP and the adjustment of MV according to MP may result in ventilation with lower MP. METHODS: Randomized controled trial conducted at the ECMO Centre Ostrava, Czech Republic, from March 2023 to March 2024 enrolled adult patients on MV (with or without extracorporeal membrane oxygenation, ECMO) with acute respiratory failure. A system for real-time MP monitoring (geometric method and simplified Becher´s formula) has been developed. In the intervention arm, the physician was able to observe the MP in real time and adjust the MV parameters accordingly. In the control group, the MP was concealed. RESULTS: A total of 494 subjects were screened and 33 patients were randomized (further 7 ECMO patients). There was no significant difference between the control and intervention groups. Median MP CONCLUSION: Although real-time MP measurement is feasible, there was no significant difference in MP between the control and intervention groups with low MP in both groups. Experience physicians was capable of safe MV, even if they do not know the exact MP value. The night shift was a high-risk period for developing lung damage due to elevated MP. TRIAL REGISTRATION: ClinicalTrials NCT06035146.
3. Clinical characteristics and factors associated with in-hospital post-surgical mortality in COVID-19 patients at a tertiary care center in Karachi, Pakistan.
Among 557 surgical COVID-19 patients, postoperative ARDS occurred in 5.6%. Age and comorbidities (hypertension, CKD, diabetes) increased in-hospital mortality risk, while emergency surgical status was paradoxically protective in multivariable analysis, potentially reflecting selection and length-of-stay effects.
Impact: Provides perioperative risk profiling during the COVID-19 era, quantifying ARDS incidence and mortality predictors, and highlighting potential biases in emergency versus elective surgery outcomes.
Clinical Implications: Risk stratify COVID-19 surgical patients by age and comorbidities; monitor for postoperative pneumonia and ARDS. Interpret lower mortality after emergency surgery cautiously, considering selection and length-of-stay biases.
Key Findings
- Postoperative ARDS occurred in 31/557 patients (5.6%); hospital-acquired pneumonia occurred in 13%.
- Higher in-hospital mortality risk with older age (HR 1.03 per year) and comorbidities: hypertension (HR 2.03), CKD (HR 3.07), diabetes (HR 1.89).
- Emergency surgery status was associated with lower in-hospital mortality (adjusted HR 0.23), potentially reflecting selection and hospitalization bias.
Methodological Strengths
- Moderate sample size with event numbers enabling hazard modeling
- Use of multivariable analysis to adjust for key comorbidities
Limitations
- Single-center retrospective design with potential selection and information bias
- Predominance of obstetric/gynecological cases limits generalizability; limited detail on ARDS diagnostic criteria
Future Directions: Conduct multicenter prospective cohorts stratified by surgery type and COVID-19 severity to clarify true perioperative risks and ARDS prevention strategies.
BACKGROUND: In this study we aimed to determine the clinical manifestations, complications and outcomes of COVID-19 patients who had undergone surgical interventions at a tertiary care hospital in Karachi, Pakistan. METHODS: We conducted a retrospective cohort study. Data were extracted from hospital records on all adult COVID-19 patients who had undergone surgical procedures between March 2020 and April 2022. RESULTS: Out of 557 patients, the majority underwent elective procedures (n = 362; 65%). More than half of the procedures were Obstetric or Gynecological Surgery (n = 346; 62%) followed by General Surgery (n = 60; 11%) and Otolaryngology (n = 37; 7%). The cumulative in-hospital mortality was 8%. The most frequent complications were hospital-acquired pneumonia(n = 71; 13%) followed by acute respiratory distress syndrome (ARDS) in (n = 31; 5.6%). Patients undergoing emergency surgery were significantly older (median age 46 vs. 30 years, p < 0.001) with male predominance (58.5% vs. 9.7%, p < 0.001) compared to elective surgery . Increasing age, (HR: 1.03; 95% CI: 1.01-1.05; p = 0.002), pre-existing chronic illnesses including hypertension (HR: 2.03; 95% CI: 1.12-3.71; p = 0.020), chronic kidney disease (HR: 3.07; 95% CI: 1.40-6.75; p = 0.005) and diabetes mellitus (HR: 1.89; 95% CI: 1.04-3.45; p = 0.037) and among complications; myocardial infarction (HR: 2.47; 95% CI: 1.26-4.84; p = 0.009) were significantly associated with an increased hazard for in-hospital death on univariable analysis whereas Conversely, emergency surgical procedure was found to be protective (HR: 0.44; 95% CI: 0.21-0.93; p = 0.030). In the multivariable analysis, emergency surgical procedure status remained a significant protective factor with an adjusted hazard ratio of 0.23 (95% CI: 0.07-0.71; p = 0.010). CONCLUSION: The risk of post-operative in-hospital mortality was found to be lower in COVID-19 patients who underwent emergency surgical procedures compared with elective surgical procedures. These findings may be due to longer hospitalization in patients who underwent emergency surgical procedures. Larger multicenter studies are needed for a more comprehensive analysis.