Daily ReportOct 2, 2026
Anesthesiology, October 2 edition
We read 45 papers and selected 3.
Summary
Today’s most impactful anesthesiology research includes a large multicenter study showing that intraoperative blood pressure reductions relative to a patient’s baseline may predict postoperative pneumonia better than fixed absolute thresholds. A randomized triple-blind trial demonstrated that intravenous dexamethasone substantially prolongs opioid-free analgesia after pediatric hand surgery, while a new ERAS consensus protocol provides structured perioperative recommendations for cerebral bypass in moyamoya disease.
Research Themes
- Personalized intraoperative blood pressure management and postoperative pulmonary complications
- Opioid-sparing regional anesthesia and adjunctive analgesia in children
- Enhanced recovery and standardized perioperative care for high-risk cerebrovascular surgery
Selected Articles
1. Intra-operative hypotension threshold models and subdistribution hazard of postoperative pneumonia in patients having non-cardiac surgery.
In a retrospective multicenter cohort of 151,036 adults undergoing non-cardiac surgery, postoperative pneumonia occurred in 2.3% of patients. Relative mean arterial pressure reductions from baseline, particularly a 20% reduction, were more consistently associated with pneumonia than fixed absolute thresholds; both the number and presence of such episodes were associated with increased risk.
Impact: This study challenges the widespread use of universal absolute blood pressure thresholds by supporting patient-specific, baseline-relative hemodynamic assessment. Its very large multicenter dataset and clinically important pulmonary outcome provide a strong basis for prospective trials of individualized intraoperative blood pressure management.
Clinical Implications: Intraoperative blood pressure management may benefit from monitoring deviations from each patient’s baseline rather than relying solely on fixed mean arterial pressure thresholds. The findings support heightened attention to recurrent or deep relative hypotension, while causal benefit from intervention remains unproven.
Key Findings
- Among 151,036 patients, 3,486 developed postoperative pneumonia within 30 days, corresponding to an incidence of 2.3%.
- At a 20% reduction from baseline mean arterial pressure, the number of hypotension episodes was associated with pneumonia (subdistribution hazard ratio 1.079, 95% confidence interval 1.050-1.109).
- Relative blood pressure reductions were more consistently informative than absolute thresholds, and risk increased rapidly at low exposure levels before plateauing across 20%-40% relative thresholds.
Methodological Strengths
- Very large multicenter cohort with 151,036 patients and systematic comparison of 12 hypotension metrics across nine thresholds.
- Use of competing-risk methodology and dose-response analyses to examine clinically relevant postoperative pneumonia.
Limitations
- The retrospective observational design cannot establish that treating relative hypotension prevents postoperative pneumonia.
- The cohort was derived from three hospitals in China, which may limit transportability to other healthcare systems and patient populations.
Future Directions: Prospective multicenter trials should test individualized blood pressure algorithms that target relative deviations from baseline and assess whether they reduce pneumonia and other organ complications. Future studies should also evaluate how baseline definition, chronic hypertension, comorbidity, and measurement frequency modify the association.
INTRODUCTION: Intra-operative hypotension is common during general anaesthesia, but its association with postoperative pneumonia remains uncertain, partly because hypotension has been defined using different thresholds. We evaluated whether absolute thresholds or relative reductions from baseline mean arterial pressure were associated more strongly with postoperative pneumonia after non-cardiac surgery. METHODS: We conducted a retrospective multicentre cohort study of 151,036 adults undergoing non-cardiac surgery under general anaesthesia at three Chinese hospitals.
2. Intravenous Dexamethasone Prolongs Opioid-Free Analgesia After Pediatric Hand Surgery: A Randomized Triple-Blind Trial.
In 90 children undergoing elective hand or wrist surgery, intravenous dexamethasone given before ultrasound-guided supraclavicular brachial plexus block prolonged median time to first rescue opioid from 8.9 hours with placebo to 14.3 hours with 0.1 mg/kg and 17.3 hours with 0.2 mg/kg. Dexamethasone also reduced postoperative opioid consumption and pain, but delayed first documented spontaneous finger movement.
Impact: This high-quality randomized trial identifies a practical, dose-responsive, and opioid-sparing adjunct to pediatric regional anesthesia. It also demonstrates an important trade-off between prolonged analgesia and delayed motor recovery, which is directly relevant to ambulatory pediatric care.
Clinical Implications: Intravenous dexamethasone may be considered as an adjunct to pediatric supraclavicular brachial plexus block when prolonged opioid-sparing analgesia is desired. Clinicians should counsel families about delayed motor recovery and incorporate motor assessment and fall or injury precautions into discharge planning.
Key Findings
- Median time to first rescue opioid administration increased from 8.9 hours with placebo to 14.3 hours with 0.1 mg/kg dexamethasone and 17.3 hours with 0.2 mg/kg.
- Both dexamethasone doses reduced postoperative opioid consumption and pain scores during the 48-hour follow-up.
- Dexamethasone delayed first documented spontaneous finger movement, with no serious adverse events observed.
Methodological Strengths
- Randomized triple-blind placebo-controlled design with two dexamethasone doses.
- Clinically relevant primary outcome and prespecified assessment of analgesia, motor recovery, opioid use, and adverse events.
Limitations
- The sample size was modest, with 30 children per treatment group.
- The study involved elective pediatric hand and wrist surgery, which may limit generalizability to other operations, blocks, or higher-risk children.
Future Directions: Larger multicenter trials should evaluate the optimal dose, duration of motor block, functional recovery, discharge safety, and outcomes in different pediatric procedures and age groups. Studies should also compare intravenous dexamethasone with perineural administration and other opioid-sparing strategies.
BACKGROUND: Postoperative pain control after pediatric hand surgery remains challenging despite the increasing use of regional anesthesia. This randomized triple-blind trial evaluated whether adjunctive intravenous dexamethasone prolongs postoperative opioid-free analgesia after pediatric supraclavicular brachial plexus block. METHODS: Ninety children undergoing elective hand or wrist surgery were randomized to receive intravenous placebo, dexamethasone 0.1 mg/kg, or dexamethasone 0.2 mg/kg before ultrasound-guided supraclavicular brachial plexus block.
3. Enhanced Recovery After Surgery Consensus Protocol for Cerebral Bypass in Moyamoya Disease.
A multidisciplinary group developed the first comprehensive ERAS protocol specifically for direct cerebral bypass surgery in moyamoya disease. After reviewing 32 studies, the panel identified seven perioperative domains and issued strong recommendations for 34 interventions spanning patient selection, preoperative optimization, anesthesia, analgesia, neuromonitoring, surgical strategy, postoperative care, and recovery.
Impact: This work addresses a major gap in perioperative standardization for a high-risk cerebrovascular population in which small changes in blood pressure, carbon dioxide, hydration, or cerebral perfusion can have serious consequences. It provides a practical framework for multidisciplinary implementation and future outcome evaluation.
Clinical Implications: Institutions performing cerebral bypass for moyamoya disease can use the protocol to structure preoperative assessment, anesthetic and analgesic planning, intraoperative neuromonitoring, postoperative hemodynamic management, and recovery pathways. Local adaptation and audit of adherence and outcomes are essential before assuming benefit.
Key Findings
- Thirty-two studies were included in the evidence review.
- Seven perioperative domains were identified: patient selection, preoperative optimization, anesthesia and analgesia, intraoperative neuromonitoring, surgical strategy, postoperative management, and follow-up and recovery.
- Strong recommendations were developed for 34 specific interventions across the perioperative continuum.
Methodological Strengths
- Multidisciplinary guideline development involving cerebrovascular surgery, neurointensive care, vascular neurology, neurophysiology, and anesthesiology.
- Systematic literature review combined with the GRADE framework to assess evidence quality and recommendation strength.
Limitations
- The protocol is based on a limited and heterogeneous evidence base, and many recommendations may depend on expert consensus rather than high-certainty comparative trials.
- Clinical effectiveness, implementation feasibility, and patient outcomes after protocol adoption were not directly tested.
Future Directions: Prospective multicenter implementation studies should measure protocol adherence, perioperative ischemic events, neurologic outcomes, length of stay, complications, and patient-centered recovery. Future updates should incorporate randomized or pragmatic comparative evidence and clearly distinguish high-certainty recommendations from consensus-based guidance.
BACKGROUND AND OBJECTIVE: Moyamoya disease (MMD) is a progressive cerebrovascular disorder treated primarily with surgical revascularization to prevent stroke recurrence. Despite established surgical techniques, standardized perioperative care protocols remain limited, potentially leading to variable outcomes and perioperative complications. Enhanced Recovery After Surgery (ERAS) protocols have demonstrated improved outcomes across surgical disciplines but have not been systematically applied to cerebral bypass surgery for MMD. The objective was to develop evidence-based ERAS recommendations for perioperative management of patients undergoing direct cerebral bypass surgery for MMD, based on a systematic literature review and expert consensus.