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Daily Report

Daily Anesthesiology Research Analysis

02/24/2025
3 papers selected
3 analyzed

Three impactful studies for anesthesiology and critical care emerged today: a multicenter cohort defined four phenotypes of post-sepsis recovery with distinct 1-year trajectories; an international observational study linked ventilator settings to mortality in acute brain injury; and a meta-analysis found remimazolam safer than propofol in elderly patients during general anesthesia. Together, they inform ICU survivorship pathways, neurocritical ventilation practices, and geriatric anesthesia safe

Summary

Three impactful studies for anesthesiology and critical care emerged today: a multicenter cohort defined four phenotypes of post-sepsis recovery with distinct 1-year trajectories; an international observational study linked ventilator settings to mortality in acute brain injury; and a meta-analysis found remimazolam safer than propofol in elderly patients during general anesthesia. Together, they inform ICU survivorship pathways, neurocritical ventilation practices, and geriatric anesthesia safety.

Research Themes

  • ICU survivorship and post-sepsis phenotyping
  • Mechanical ventilation strategies in neurocritical care
  • Geriatric anesthesia safety and sedative selection

Selected Articles

1. Phenotypes of Functional Decline or Recovery in Sepsis ICU Survivors: Insights From a 1-Year Follow-Up Multicenter Cohort Analysis.

80Level IIICohort
Critical care medicine · 2025PMID: 39992173

In a 21-ICU prospective cohort (n=220), four discharge phenotypes of sepsis-associated PICS were identified spanning none, mild, moderate, and severe multi-domain impairments. Mild physical/cognitive deficits improved by 3 months, but moderate and severe phenotypes showed persistent disability at 12 months; severe phenotype had ongoing depression and declining survival.

Impact: This phenotyping provides a pragmatic framework to tailor post-ICU follow-up and rehabilitation resources based on early discharge assessments, potentially improving long-term outcomes for sepsis survivors.

Clinical Implications: Use discharge assessments (Barthel, SMQ, HADS, IES-R, EQ-5D-5L, frailty, grip/MRC) to assign patients to phenotypes and prioritize intensive, multi-domain rehabilitation and mental health support for moderate/severe PICS; monitor severe phenotype closely for mortality risk.

Key Findings

  • Four discharge phenotypes identified: no PICS (n=62), mild (physical and cognitive; n=55), moderate (all domains; n=53), severe (all domains; n=50).
  • Mild phenotype improved by 3 months; moderate and severe phenotypes showed persistent disability over 12 months.
  • Psychiatric PICS improved in moderate/severe groups, but depression persisted at 12 months in the severe group.
  • All groups had persistently reduced QoL and low employment (0–50%), with continuously decreasing survival in the severe group.

Methodological Strengths

  • Prospective multicenter design across 21 ICUs with standardized assessments
  • One-year follow-up capturing functional, psychiatric, QoL, and survival outcomes

Limitations

  • Moderate sample size (n=220) with potential selection bias to survivors
  • Cluster phenotypes are data-driven and require external validation for generalizability

Future Directions: Validate phenotypes in larger, international cohorts and test phenotype-guided rehabilitation and mental health interventions in pragmatic trials to improve survivorship outcomes.

OBJECTIVE: Sepsis often leads to heterogeneous symptoms of post-intensive care syndrome (PICS) composing physical, cognitive, and psychiatric disabilities, resulting in deteriorated quality of life (QoL), with limited interventions. This study aimed to identify phenotypes of sepsis-associated PICS by physical, cognitive, and psychiatric function and QoL at hospital discharge. DESIGN: A prospective observational study. SETTING: Twenty-one mixed ICUs. PATIENTS: All consecutive adult patients between November 2020 and April 2022, diagnosed with sepsis at ICU admissions and survived discharge, were enrolled. INTERVENTIONS: None. MEASUREMENTS AND MAIN RESULTS: Phenotyping with clusters determined by three approaches was performed with following variables at hospital discharge: Barthel Index (≤ 90 defined physical PICS), Short Memory Questionnaire (< 40 defined cognitive PICS), Hospital Anxiety and Depression Scale (≥ 8 defined psychiatric PICS), Impact of Event Scale-Revised (≥ 25 defined psychiatric PICS), EuroQoL 5-dimension 5-level, Clinical Frailty Scale hand-grip strength, and Medical Research Council. Each disability, employment, destination, and survival, were followed over the first year of hospital discharge. In total, 220 ICU patients were included (median age: 72.5 yr, 129 males (59%), 166 septic shocks (75%), and median Sequential Organ Failure Assessment Score: 8). Four phenotypes were identified: group 1 ( n = 62) with no PICS, group 2 ( n = 55) with mild PICS (physical and cognitive), group 3 ( n = 53) with moderate PICS (all domains), and group 4 ( n = 50) with severe PICS (all domains). Functional decline and recovery significantly varied among the phenotypes. Physical and cognitive PICS in group 2 improved by the 3-month follow-up, whereas the disabilities in groups 3 and 4 remained over the year. Psychiatric PICS in groups 3 and 4 ameliorated, whereas depression symptoms in group 4 were still evident at the 12-month follow-up. All groups showed persistent moderate to severe reduced QoL and low employment (0-50%). The survival in group 4 continuously decreased. CONCLUSIONS: Four clinical phenotypes of ICU sepsis survivors might contribute to a deeper understanding of post-sepsis trajectories and an individualized treatment approach.

2. Ventilation practices in acute brain injured patients and association with outcomes: the VENTIBRAIN multicenter observational study.

74.5Level IIICohort
Intensive care medicine · 2025PMID: 39992441

Across 74 ICUs in 26 countries (n=2095 ABI patients), protective ventilation was common but variable; admission Pplat had a median of 15 cmH2O. Ventilator settings during ICU stay were associated with ICU and 6‑month mortality but not with unfavorable neurological outcomes.

Impact: This large prospective study provides granular, international benchmarks for ventilation in ABI and links modifiable ventilator parameters to mortality, informing practice harmonization and future interventional trials.

Clinical Implications: Adopt protective ventilation while minimizing unnecessary variability; monitor and titrate ventilator settings mindful of their association with mortality. The lack of association with neurological outcome suggests prioritizing systemic safety endpoints alongside neuroprotection.

Key Findings

  • International prospective cohort of 2,095 ABI patients across 74 ICUs documented daily ventilator settings through day 14.
  • Protective ventilation strategies were common but varied substantially between countries.
  • Ventilator settings during ICU stay were associated with increased ICU and 6‑month mortality.
  • No association was found between ventilator settings and unfavorable 6‑month neurological outcome.

Methodological Strengths

  • Large, prospective, multicenter international design with daily ventilator data
  • Hard outcomes assessed at ICU discharge and 6 months

Limitations

  • Observational design limits causal inference; residual confounding likely
  • Heterogeneity in practice patterns across countries may affect generalizability of specific thresholds

Future Directions: Randomized trials to test ventilator strategies tailored to ABI pathophysiology; development of consensus protocols to reduce harmful variability.

PURPOSE: Current mechanical ventilation practices for patients with acute brain injury (ABI) are poorly defined. This study aimed to describe ventilator settings/parameters used in intensive care units (ICUs) and evaluate their association with clinical outcomes in these patients. METHODS: An international, prospective, multicenter, observational study was conducted across 74 ICUs in 26 countries, including adult patients with ABI (e.g., traumatic brain injury, intracranial hemorrhage, subarachnoid hemorrhage, and acute ischemic stroke), who required ICU admission and invasive mechanical ventilation. Ventilatory settings were recorded daily during the first week and on days 10 and 14. ICU and 6-months mortality and 6-months neurological outcome were evaluated. RESULTS: On admission, 2095 recruited patients (median age 58 [interquartile range 45-70] years, 66.1% male) had a median plateau pressure (Pplat) of 15 (13-18) cmH CONCLUSIONS: Protective ventilation strategies are commonly used in ABI patients but with high variability across different countries. Ventilator settings during ICU stay were associated with an increased risk of ICU and 6-month mortality, but not an unfavorable neurological outcome.

3. Comparison of the safety of remimazolam and propofol during general anesthesia in elderly patients: systematic review and meta-analysis.

72Level IMeta-analysis
Frontiers in medicine · 2025PMID: 39991057

Meta-analysis of eight RCTs (n=571) shows remimazolam reduces hypotension, bradycardia, and injection-site pain versus propofol in elderly general anesthesia, with more stable MAP and HR after induction. Results support remimazolam as a safer alternative in geriatric patients.

Impact: Addresses a high-risk population central to anesthetic practice with pooled RCT evidence, informing sedative selection and peri-induction hemodynamic management.

Clinical Implications: Consider remimazolam as first-line or alternative induction/maintenance sedative in elderly where hypotension/bradycardia risk is a concern; maintain individualized dosing and monitoring given study heterogeneity.

Key Findings

  • Eight RCTs (571 participants) compared remimazolam vs propofol in elderly general anesthesia.
  • Remimazolam lowered incidence of hypotension and bradycardia versus propofol.
  • Injection-site pain was less frequent with remimazolam.
  • MAP and HR were more stable after induction with remimazolam.

Methodological Strengths

  • Systematic review and meta-analysis of randomized controlled trials
  • Prospective registration (PROSPERO) and multi-database search

Limitations

  • Total sample size moderate; potential heterogeneity in dosing, anesthesia protocols, and outcome definitions
  • Limited long-term outcomes; focus primarily on peri-induction safety endpoints

Future Directions: Head-to-head pragmatic trials comparing remimazolam-based vs propofol-based pathways in high-risk geriatric surgery, including recovery profiles and cost-effectiveness.

BACKGROUND: Remimazolam is a novel sedative drug approved for procedural sedation and general anesthesia. Clinical trials have already explored its use in elderly patients for general anesthesia. For elderly patients with declining physical and physiological function, anesthesia safety is crucial. Most current clinical studies compare the safety of remimazolam and propofol, though the results are inconsistent. Therefore, we conducted a meta-analysis to compare the safety of remimazolam and propofol in general anesthesia for elderly patients. METHODS: We systematically searched the PubMed, Cochrane Library, Embase, and Web of Science databases for all published randomized controlled trials comparing remimazolam and propofol for general anesthesia in elderly patients. We synthesized data from eligible studies using relative risk or mean difference, and analyzed differences in hemodynamic stability and adverse effects between the two drugs. Data extraction and quality assessment were performed independently by two researchers. RESULTS: Eight randomized controlled trials involving 571 participants were included. Compared to propofol, remimazolam was associated with a lower incidence of hypotension (RR = 0.51, 95% CI: [0.33, 0.81], CONCLUSION: In this meta-analysis, compared to propofol, remimazolam reduced the incidence of hypotension, bradycardia, and injection site pain during general anesthesia in elderly patients. The mean arterial pressure (MAP) and heart rate (HR) were more stable after induction. Remimazolam may be a safer sedative for elderly patients. SYSTEMATIC REVIEW REGISTRATION: https://www.crd.york.ac.uk/prospero/display_record.php?ID=CRD42024516950, CRD42024516950.