Daily Anesthesiology Research Analysis
Analyzed 14 papers and selected 3 impactful papers.
Summary
The strongest evidence comes from a randomized controlled trial showing that dexmedetomidine-ketamine multimodal anesthesia guided by an electroencephalographic spectrogram improved early recovery and reduced perioperative opioid and sevoflurane exposure in older adults undergoing lumbar spine fusion. A large multicentre Brazilian cohort quantified the substantial burden and early timing of severe complications after cardiac surgery, while a meta-analysis found no clinically meaningful analgesic superiority of erector spinae plane block over paravertebral block in breast surgery.
Research Themes
- Brain-guided multimodal anesthesia and patient-centered recovery
- Early postoperative deterioration after cardiac surgery
- Comparative effectiveness of regional analgesic techniques
Selected Articles
1. Dexmedetomidine-Ketamine-Based Multimodal General Anesthesia with Electroencephalographic Spectrogram-Guided Titration Improves Early Recovery After Lumbar Spine Fusion in Older Adults: A Randomized Controlled Trial.
In 100 randomized older adults undergoing lumbar spine fusion, spectrogram-guided dexmedetomidine-ketamine multimodal anesthesia resulted in a smaller 24-hour decline in QoR-15 than conventional balanced anesthesia. It reduced sevoflurane, intraoperative fentanyl, and post-anesthetic care unit morphine requirements, but increased intraoperative norepinephrine and atropine use. The possible reduction in 3-month pain intensity was exploratory.
Impact: This trial provides clinically relevant randomized evidence that a brain-pattern-informed, opioid-sparing anesthetic strategy can improve early patient-reported recovery after high-pain surgery. It also identifies important hemodynamic trade-offs that must be addressed before broad adoption.
Clinical Implications: Electroencephalographic spectrogram-guided dexmedetomidine-ketamine anesthesia may be considered as an opioid- and volatile-anesthetic-sparing strategy for older adults undergoing lumbar spine fusion, provided that clinicians are prepared for increased vasopressor and atropine requirements and monitor hemodynamics closely.
Key Findings
- The 24-hour QoR-15 decline was smaller with multimodal anesthesia than with conventional balanced anesthesia (-22.5 vs -33.5 points; mean difference 11.0; 95% CI 0.8-21.2; p=0.036).
- Sevoflurane, intraoperative fentanyl, and post-anesthetic care unit morphine requirements were significantly reduced.
- Intraoperative norepinephrine and atropine requirements increased, while safety outcomes did not differ significantly; the study was not powered to exclude clinically important safety differences.
- Exploratory 3-month analyses suggested lower average pain intensity, but not a statistically significant increase in the proportion of pain-free patients.
Methodological Strengths
- Randomized parallel-group superiority design with 100 participants and prospective patient-centered primary outcome assessment.
- Trial registration was provided through ClinicalTrials.gov (NCT05247177), and the intervention incorporated physiologically informative electroencephalographic spectrogram monitoring.
Limitations
- The sample size was modest and the trial was not powered to establish differences in uncommon safety outcomes or persistent postsurgical pain.
- The 3-month pain analyses were explicitly exploratory, and generalizability beyond older adults undergoing lumbar spine fusion is uncertain.
Future Directions: Larger multicentre trials should confirm the recovery benefit, define hemodynamic safety, and test whether spectrogram-guided multimodal anesthesia reduces persistent postsurgical pain, delirium, hospital length of stay, or other clinically meaningful outcomes.
BACKGROUND: Older adults undergoing lumbar spine fusion are vulnerable to impaired postoperative recovery and persistent postsurgical pain. Dexmedetomidine-ketamine-based multimodal general anesthesia may reduce volatile anesthetic and opioid exposure, but its efficacy and tolerability in older adults undergoing high-pain spine surgery remain uncertain. This randomized controlled trial evaluated whether electroencephalographic spectrogram-guided multimodal general anesthesia improves early recovery compared with conventional balanced anesthesia.
2. Epidemiology, clinical outcomes and risk factors for mortality and severe postoperative complications in cardiac surgery patients admitted to intensive care units in Brazil: a multicentre observational study.
In this prospective multicentre cohort of 528 Brazilian cardiac surgery patients requiring intensive care, 32% experienced early mortality or severe postoperative complications, predominantly within the first 24 hours. Severe hemodynamic instability occurred in 24% and acute respiratory distress syndrome in 13%. The study identifies a substantial early postoperative burden in a low- and middle-income country and supports locally adapted prognostic models.
Impact: This study fills an important evidence gap by prospectively characterizing cardiac surgical outcomes in Brazil across 11 hospitals. The concentration of events on the day of intensive care admission provides a practical target for intensified monitoring and early intervention.
Clinical Implications: Perioperative teams should prioritize the first 24 hours after cardiac surgery for hemodynamic and respiratory surveillance, especially in patients with identified risk factors. The findings may inform resource allocation and development of prognostic tools tailored to Brazilian and other resource-constrained settings.
Key Findings
- Among 528 patients, 170 (32%) experienced early mortality or severe postoperative complications.
- Severe hemodynamic instability occurred in 126 patients (24%), and acute respiratory distress syndrome occurred in 71 patients (13%).
- Most events occurred on the day of intensive care unit admission: 132 of 170 events (78%).
- The study identified clinical predictors of early deterioration using generalized linear mixed-effects models, supporting context-specific risk prediction.
Methodological Strengths
- Prospective multicentre cohort design involving 11 Brazilian hospitals, addressing a geographically and systemically underrepresented population.
- Use of generalized linear mixed-effects models accounted for clustering and enabled adjusted estimation of risk factors.
Limitations
- The cohort included only patients requiring postoperative intensive care, limiting generalizability to lower-risk cardiac surgery patients.
- The reported abstract does not provide complete effect estimates for all predictors, and observational associations cannot establish causality.
Future Directions: Future studies should externally validate the identified predictors, develop and calibrate Brazilian risk-prediction models, and evaluate whether targeted first-day interventions reduce severe complications and mortality.
BACKGROUND: Cardiac surgery carries substantial risks of perioperative complications and mortality; however, outcome data from low- and middle-income countries are scarce. This prospective observational cohort study conducted across 11 Brazilian hospitals aimed to determine the incidence of early mortality and major postoperative complications in patients undergoing cardiac surgery in Brazil. METHODS: Adults (≥18 yr) undergoing coronary, valvular, or percutaneous cardiac surgery requiring postoperative ICU admission, excluding patients under exclusive palliative care, device implantation only, or moribund before surgery.
3. Erector spinae plane block (ESPB) versus paravertebral plane block (PVB) in managing post-operative pain in breast cancer patients: a systematic review and meta-analysis.
This systematic review and meta-analysis included 19 randomized controlled trials involving 1,527 patients undergoing breast cancer surgery. ESPB and PVB had comparable postoperative morphine consumption, fentanyl use, pain scores, rescue analgesia, analgesia duration, and postoperative nausea and vomiting. ESPB was associated with a statistically shorter operation time, but the magnitude was clinically negligible.
Impact: The analysis addresses a common clinical choice in regional anesthesia and suggests that ESPB may offer analgesia equivalent to PVB without a meaningful loss of efficacy. The negative comparative result is valuable because it supports technique selection based on simplicity, expertise, and safety rather than presumed analgesic superiority.
Clinical Implications: ESPB can be considered a simpler alternative to PVB for breast cancer surgery when appropriate expertise and monitoring are available. Clinicians should not expect a meaningful reduction in opioid consumption or pain scores solely from choosing ESPB over PVB.
Key Findings
- Nineteen randomized controlled trials involving 1,527 patients were included.
- Postoperative morphine consumption, intraoperative fentanyl use, pain scores at rest and movement, rescue analgesia, and analgesia duration were not significantly different between ESPB and PVB.
- Postoperative nausea and vomiting incidence was comparable between techniques.
- ESPB shortened surgery duration statistically, but the effect was clinically negligible (MD -0.04; 95% CI -0.07 to 0.00; p=0.023).
Methodological Strengths
- Systematic searching of four databases and inclusion of 19 randomized controlled trials with a substantial pooled sample.
- Risk of bias was assessed using the ROB-2 tool, and quantitative pooling was performed with statistical software.
Limitations
- The included trials may have differed in block technique, local anesthetic regimen, surgical procedures, and perioperative analgesic protocols, contributing to clinical heterogeneity.
- The statistically significant difference in surgery duration was clinically negligible, and the abstract does not provide detailed certainty or publication-bias estimates for every outcome.
Future Directions: Future trials should use standardized block protocols, report patient-important recovery outcomes, assess complications and technical failure rates, and determine whether specific surgical subgroups benefit more from ESPB or PVB.
BACKGROUND: Breast cancer surgeries remain the cornerstone of treatment for early-stage disease. Nonetheless, a substantial proportion of patients experience moderate-to-severe acute or chronic postoperative pain, adversely affecting quality of life and functional recovery. Regional anesthetic techniques have emerged as effective strategies for perioperative pain control. This study compares the erector spinae plane block (ESPB) and the thoracic paravertebral block (PVB) in breast cancer surgeries. METHODS: Four databases were systematically searched for randomized controlled trials (RCTs) using ESPB and PVB in breast cancer surgeries. Primary extracted outcomes include post-operative morphine consumption, analgesia duration, resting and dynamic pain scores.