Daily Anesthesiology Research Analysis
Analyzed 103 papers and selected 3 impactful papers.
Summary
Three papers stand out today in anesthesiology and critical care: a large meta-analysis in Anesthesiology shows higher intraoperative blood pressure targets do not improve major outcomes, a UK Biobank GWAS in Anesthesiology identifies APOE as a risk locus for postoperative delirium and links delirium to later dementia, and a prospective Critical Care Medicine study demonstrates safe, cost-saving remote respiratory therapy including full ventilator management in a donor ICU.
Research Themes
- Perioperative hemodynamic targets and outcomes
- Genetic risk and long-term neurocognitive sequelae after surgery
- Telecritical care implementation and remote ventilator management
Selected Articles
1. Higher versus Routine Intraoperative Blood Pressure Targets in Noncardiac Surgery: A Systematic Review and Meta-analysis with Trial Sequential Analysis of Randomized Trials.
Across 15 randomized trials (15,603 patients), higher intraoperative blood pressure targets did not reduce acute kidney injury, myocardial injury, or mortality versus routine management. A possible reduction in postoperative delirium emerged, but trial sequential analysis indicated current evidence is insufficient for firm conclusions.
Impact: This meta-analysis clarifies a long-standing management question and prevents overtreatment by showing higher intraoperative blood pressure targets do not improve major outcomes.
Clinical Implications: Maintain guideline-recommended MAP ≥60–65 mmHg; routine elevation beyond this for all patients is unlikely to improve AKI, myocardial injury, or mortality. Consider targeted trials for delirium reduction and individualized strategies rather than universal higher thresholds.
Key Findings
- Higher intraoperative BP targets did not reduce AKI (RR 0.95) or acute myocardial injury (RR 1.02) versus routine targets.
- No difference in in-hospital or 30-day mortality (RR 1.00).
- Postoperative delirium was reduced (RR 0.73), but TSA showed insufficient cumulative evidence.
- Heterogeneity was low to moderate for key endpoints (I² ≤ 26%).
Methodological Strengths
- PRISMA-guided meta-analysis of randomized trials with trial sequential analysis to assess conclusiveness.
- Large aggregated sample (15,603 patients) and low heterogeneity for key outcomes.
Limitations
- Potential variability in BP targeting protocols and patient risk profiles across trials.
- Insufficient information for firm conclusions on MACE, stroke, length of stay, and delirium per TSA.
Future Directions: Adequately powered RCTs focusing on postoperative delirium, enriched-risk populations, and personalized BP targets (e.g., baseline-referenced strategies) are warranted.
BACKGROUND: Observational studies consistently link intraoperative hypotension to adverse postoperative outcomes, leading guidelines to recommend maintaining mean arterial pressure (MAP) ≥60-65 mmHg during noncardiac surgery. Whether targeting higher intraoperative blood pressure values improves clinical outcomes remains uncertain. METHODS: We conducted a PRISMA-guided search on PubMed, Cochrane CENTRAL, Scopus, and Embase from inception to April 2026. Randomized trials comparing higher intraoperative blood pressure targets, either as fixed absolute thresholds or personalized to preoperative baseline, versus routine blood pressure management in adults undergoing elective noncardiac surgery with general anesthesia were included. Outcomes included in-hospital or 30-day mortality, postoperative delirium, acute kidney injury (AKI), 30-day major cardiovascular events (MACE), acute myocardial injury, stroke, length of stay, and intraoperative hypotension. RESULTS: Fifteen trials (15,603 patients) were included. Higher targets did not reduce AKI (RR = 0.95; 95% CI = 0.85 to 1.06; p = 0.36; I² = 16%) or acute myocardial injury (RR = 1.02; 95% CI = 0.94 to 1.12; p = 0.59; I² = 0%) compared with routine targets, with firm evidence from trial sequential analysis (TSA). Higher targets were associated with a significant reduction in postoperative delirium (RR = 0.73; 95% CI = 0.54 to 0.98; p = 0.04; I² = 26%), although TSA indicated the cumulative evidence remained insufficient to draw firm conclusions. No significant effect was observed on in-hospital or 30-day mortality (RR = 1.00; 95% CI = 0.75 to 1.34; p = 1.00; I² = 0%); evidence on 30-day MACE, stroke, and length of stay was similarly insufficient to draw firm conclusions. CONCLUSION: In adults undergoing elective noncardiac surgery, targeting higher intraoperative blood pressure values does not improve major postoperative outcomes compared with routine management. A potential reduction in postoperative delirium warrants confirmation in adequately powered trials.
2. Genetic contributors to postoperative delirium and their implications for dementia outcomes.
Using UK Biobank data, the authors identified the APOE region (lead variant rs429358) as a genome-wide significant risk locus for ICD-coded postoperative delirium after non-cardiac surgery. Postoperative delirium was strongly associated with subsequent all-cause dementia after both non-cardiac and cardiac surgeries.
Impact: This study links a well-established neurodegeneration gene to postoperative delirium and quantifies delirium’s strong association with subsequent dementia, informing risk stratification and long-term perioperative brain health.
Clinical Implications: Preoperative cognitive risk counseling may incorporate APOE-related risk where available; rigorous prevention, detection, and treatment of POD may reduce downstream dementia burden. Genetic data should augment—rather than replace—phenotypic risk assessments.
Key Findings
- APOE region (lead rs429358) reached genome-wide significance for ICD-coded POD in non-cardiac surgery (P=5.00×10−28).
- No genome-wide significant signals were observed in the cardiac surgery cohort.
- POD was associated with subsequent all-cause dementia after non-cardiac (HR 6.45) and cardiac (HR 2.95) surgeries.
Methodological Strengths
- Very large population-based cohorts (non-cardiac n=230,179; cardiac n=21,254) with GWAS and downstream functional analyses.
- Use of Cox models to quantify long-term dementia risk after POD.
Limitations
- POD defined using ICD-10 coding may underdetect cases and introduce misclassification.
- UK Biobank selection and ancestry composition may limit generalizability; causality cannot be inferred from associations.
Future Directions: External replication; integration of EHR phenotyping with prospective delirium assessments; polygenic risk and APOE-stratified perioperative delirium prevention trials; mechanistic studies linking APOE to acute neuroinflammation.
BACKGROUND: Postoperative delirium (POD) is a perioperative neurocognitive disorder that substantially impairs patient recovery. Unfortunately, its genetic risk profile and relationship with subsequent dementia remain unclear. We aimed to elucidate genetic contributors to POD identified via Hospital Episode Statistics codes and to examine its association with subsequent dementia. METHODS: We included 230,179 non-cardiac and 21,254 cardiac surgery subjects from the UK Biobank, defining POD using ICD-10 delirium codes recorded within the first 7 postoperative days. Genome-wide association studies (GWAS) were performed in the non-cardiac and cardiac cohorts and their prespecified subgroups, followed by functional annotation, gene prioritization and drug-target analyses. Associations between POD and subsequent dementia were estimated using Cox models. RESULTS: In the non-cardiac cohort, we identified one genome-wide significant locus at the APOE region, with rs429358 as the lead variant (P=5.00×10-28). Integrative gene prioritization analyses highlighted multiple genes within this locus. Exploratory drug-target analyses suggested potential subgroup-specific drug-target enrichment. In the cardiac cohort, no genome-wide significant signals were detected. POD was associated with all-cause dementia after both non-cardiac (HR=6.45, 95% CI 5.45-7.63) and cardiac (HR=2.95, 95% CI 1.71-5.08) surgeries. CONCLUSIONS: This study demonstrates APOE as a genetic risk locus for ICD-coded POD in the non-cardiac surgery setting and confirms an association between POD and subsequent dementia.
3. Implementation of a Remote Respiratory Therapy in a Donor Center ICU Using a Telecritical Care Platform.
In a prospective 12-month study of 182 donors, remote respiratory therapy—including full ventilator management—handled 3,872 procedures with minimal onsite RT needs (6.1%) and no safety events. The model reduced staffing requirements (2.2 FTE saved; ~$306,952) while maintaining strong organ procurement performance (O:E 1.19).
Impact: Demonstrates real-world feasibility, safety, and cost-efficiency of remote ventilator management—key for workforce shortages and surge capacity—without compromising donor outcomes.
Clinical Implications: Telecritical care can safely offload bedside RT workload, enabling regionalized respiratory care models and optimized staffing. Implementation requires secure remote ventilator access and clear regulatory frameworks.
Key Findings
- Remote RT completed 3,872 procedures (1,782 hours) with only 6.1% onsite RT time required.
- No airway losses, emergency activations, cardiac arrests, or care delays occurred.
- Estimated staffing savings of 2.2 FTEs and $306,952 in avoided labor costs.
- Organ procurement remained strong (520 organs; observed-to-expected ratio 1.19).
Methodological Strengths
- Prospective, year-long implementation with comprehensive operational and safety metrics.
- Real-time audiovisual monitoring and remote ventilator interface provided robust technical capability.
Limitations
- Single-center, uncontrolled design limits causal inference and generalizability.
- Economic estimates are site-specific and may not translate across systems without detailed cost modeling.
Future Directions: Multicenter controlled studies to benchmark safety, outcomes, and economics; development of secure, vendor-agnostic remote ventilation standards and regulatory pathways.
OBJECTIVES: To evaluate the feasibility, safety, and operational impact of delivering comprehensive remote telecritical care respiratory therapy (eRT), including full ventilator management, in a dedicated brain-dead donor care ICU. DESIGN: Prospective observational study conducted over a 12-month period (from October 2023 to October 2024). SETTING: An eight-bed brain-dead donor care ICU utilizing a telecritical care platform with real-time audiovisual monitoring and remote ventilator interface capability. SUBJECTS: Organ donors (n = 182) managed during the study period. INTERVENTIONS: All respiratory therapy (RT) care, including ventilator management and procedural support, was delivered remotely. In-person RT support was available as needed. MEASUREMENTS AND MAIN RESULTS: Procedural workload, in-person RT utilization, safety events, donor outcomes, and full-time equivalent (FTE) labor requirements were recorded. eRT completed 3872 respiratory procedures, totaling 1782 hours of remote care. In-person RT support was required for 119 hours (6.1%), primarily for transport and advanced airway interventions. No airway losses, emergency RT activations, cardiac arrests, or delays in care occurred. Remote RT support resulted in an estimated savings of 2.2 FTEs and $306,952 in avoided labor costs. A total of 520 organs were procured, with an observed-to-expected recovery ratio of 1.19. CONCLUSIONS: Comprehensive remote RT, including full ventilator management, was safely and effectively implemented in a donor care ICU. This model substantially reduced bedside staffing requirements while maintaining favorable donor outcomes, supporting broader adoption and highlighting the need for regulatory pathways enabling secure remote ventilator access.