Daily Anesthesiology Research Analysis
Analyzed 70 papers and selected 3 impactful papers.
Summary
Three impactful anesthesiology studies span perioperative AI, regional anesthesia, and monitoring access. A multicenter federated learning approach outperformed local models for predicting cardiac surgery–associated AKI, an RCT showed erector spinae plane block improves analgesia and reduces complications during CT-guided lung nodule localization, and another RCT supports the anatomical snuffbox as a viable ultrasound-guided arterial access for invasive monitoring.
Research Themes
- Federated learning for perioperative risk prediction
- Regional anesthesia to enhance interventional radiology procedures
- Alternative arterial access for invasive hemodynamic monitoring
Selected Articles
1. Effect of ultrasound-guided erector spinae plane block for preoperative CT-guided percutaneous localization of pulmonary nodules: a randomized controlled trial.
In 82 patients undergoing CT-guided pulmonary nodule localization, adding ultrasound-guided ESPB to local anesthesia halved pain during pleural puncture and reduced anxiety, radiation exposure, fluoroscopy time, and pneumothorax incidence, while improving satisfaction. The findings support ESPB as an effective adjunct for thoracic interventional procedures.
Impact: This RCT provides high-quality evidence that a regional block can simultaneously improve analgesia and procedural safety/efficiency in a common thoracic interventional workflow.
Clinical Implications: Consider incorporating ESPB into CT-guided pulmonary nodule localization protocols to reduce pain and complications and potentially shorten fluoroscopy time and exposure.
Key Findings
- ESPB lowered pain during pleural penetration (NRS 2.68±1.52 vs 5.17±1.32).
- Reduced preprocedural anxiety with ESPB (44.71±3.45 vs 50.63±3.74).
- Radiation exposure and fluoroscopy time were significantly reduced (401 vs 875 mGy*cm; 55 vs 117 s).
- Pneumothorax incidence decreased (4.88% vs 19.51%); patient satisfaction improved.
Methodological Strengths
- Prospective randomized controlled design with registered protocol (NCT06441071).
- Multiple clinically relevant secondary endpoints (anxiety, radiation, complications).
Limitations
- Single-center study with modest sample size.
- Short-term peri-procedural assessments; no long-term outcomes.
Future Directions: Multicenter RCTs to validate generalizability, cost-effectiveness analyses, and evaluation of ESPB across diverse thoracic interventional procedures.
BACKGROUND: The increasing detection of pulmonary nodules through low-dose computed tomography screening has necessitated precise preoperative localization techniques. While local anesthesia is routinely used for CT-guided pulmonary nodule localization, it inadequately addresses deep tissue pain during pleural penetration. This study is to evaluate the analgesic efficacy and safety of ultrasound-guided erector spinae plane block (ESPB) during CT-guided pulmonary nodule localization. METHODS: This single-center, prospective, randomized controlled trial was conducted from June 2024 to January 2025, enrolling 82 patients undergoing preoperative CT-guided pulmonary nodule localization. Participants were randomly assigned to either control group (local anesthesia with 4 ml 1% lidocaine) or ESPB group (ultrasound-guided ESPB with 20 ml 0.375% ropivacaine plus local anesthesia). The primary outcome was numerical rating scale (NRS) score during pleural penetration. Secondary outcomes included anxiety levels, radiation exposure, procedural time, hemodynamic parameters, pneumothorax incidence, and patient satisfaction. Statistical analysis was performed using independent-sample t-test and Mann-Whitney U test. RESULTS: The ESPB group demonstrated significantly lower NRS scores during pleural penetration compared to the control group (2.68 ± 1.52 vs. 5.17 ± 1.32). Patients receiving ESPB exhibited reduced preoperative anxiety (44.71 ± 3.45 vs. 50.63 ± 3.74), decreased radiation exposure (401.06 ± 266.01 vs. 875.36 ± 377.45 mGy*cm), shorter fluoroscopy time (55.10 ± 10.54 vs. 117.39 ± 20.68 s, ), and lower pneumothorax incidence (4.88% vs. 19.51%), all P < 0.05. Post-procedural comfort scores and patient satisfaction were significantly higher in the ESPB group. CONCLUSIONS: Ultrasound-guided ESPB improves analgesia, reduces anxiety, radiation exposure and complications while enhancing patient satisfaction during CT-guided pulmonary nodule localization, representing a valuable adjunct for thoracic interventional procedures. TRIAL REGISTRATION: ClinicalTrials.gov NCT064...
2. Exploring the limits of localization: federated model stacking improves hospital-level prediction in a national research network.
Across 43,926 cardiac surgery cases from 23 hospitals, federated model stacking and pooled multicenter models consistently outperformed locally trained models for AKI prediction in temporal and external validation. The multicenter advantage was most pronounced in low-volume hospitals.
Impact: Demonstrates, with large-scale multicenter data, that federated learning can improve perioperative risk prediction over localization, addressing both privacy and generalizability.
Clinical Implications: Perioperative risk tools for AKI should leverage multicenter or federated approaches, particularly for smaller hospitals, to enhance calibration and discrimination.
Key Findings
- Federated model stacking outperformed hospital-local models for all AKI severity levels.
- Performance gains persisted in temporal and external validation across the network.
- Low-volume hospitals realized the largest AUC improvements with multicenter modeling.
Methodological Strengths
- Large, multicenter training dataset (43,926 cases across 23 hospitals).
- Both temporal and external validation; direct comparison of local vs multicenter strategies.
Limitations
- Observational model development without prospective clinical impact evaluation.
- Feature set may be limited relative to richer EHR data; external generalizability beyond the network remains to be tested.
Future Directions: Prospective deployment studies assessing clinical utility, calibration drift monitoring, and extension to other perioperative adverse events.
Challenges with model generalizability and data privacy have led to a shift in health artificial intelligence (AI) models being trained locally within individual health systems rather than relying on multicenter data. Localization carries the promise of capturing local practice patterns and patient demographics, presumably resulting in better models. Our study empirically tests this hypothesis in a national research network by comparing locally trained models predicting acute kidney injury (AKI) after cardiac surgery with two multicenter modeling approaches, pooling and a novel federated model stacking method. Trained on 43,926 cases across 23 hospitals, the study finds that multicenter models outperform single-center approaches, with higher area under the receiver operating characteristic curves (AUCs) for all AKI severity levels in both temporal and external validation sets. Hospitals with smaller case volumes benefit the most from multicenter approaches, showing the greatest AUC increase over locally trained models.
3. Invasive Blood Pressure Monitoring Using Ultrasound-guided Artery Cannulation Through the Distal Radial Artery Approach at the Anatomical Snuffbox Compared With the Conventional Artery Approach: A Randomized Controlled Trial.
In a three-arm RCT (n=120), ultrasound-guided distal radial (anatomical snuffbox) cannulation achieved first-attempt success rates comparable to conventional radial access, though with longer puncture duration than standard radial. It offers a clinically viable alternative arterial site for invasive blood pressure monitoring.
Impact: Provides randomized evidence supporting a distal radial (snuffbox) approach as an alternative access site, relevant when conventional sites are unavailable or compromised.
Clinical Implications: Consider snuffbox distal radial access when standard radial access is not feasible or to preserve proximal radial artery; anticipate slightly longer cannulation time.
Key Findings
- First-attempt success: snuffbox 75%, conventional radial 72.5%, dorsalis pedis 52.5% (no significant differences between A vs B).
- Puncture duration was shorter with conventional radial vs snuffbox and dorsalis pedis (p=0.001 for both comparisons).
- Ultrasound-guided snuffbox access is a feasible alternative for invasive hemodynamic monitoring.
Methodological Strengths
- Randomized three-arm comparison of commonly used arterial access sites.
- Ultrasound guidance standardization enhances internal validity.
Limitations
- Single-center design with modest sample size.
- Not powered to detect differences in rare vascular complications.
Future Directions: Larger multicenter trials assessing complication rates, catheter longevity, and patient comfort; subgroup analyses (e.g., small-caliber arteries, coagulopathy).
OBJECTIVE: To evaluate the feasibility of ultrasound-guided radial artery cannulation in the anatomical snuffbox for invasive blood pressure monitoring. Invasive blood pressure monitoring is essential for the management of critically ill patients. The conventional radial artery and dorsalis pedis artery are standard access sites; nevertheless, they present limitations. Recently, distal transradial access has become a promising new approach, due to its association with fewer complications and greater patient comfort. DESIGN: A randomized controlled study. SETTING: May 1, 2023, to May 1, 2024. PARTICIPANTS: A total of 120 patients scheduled for invasive blood pressure monitoring via arterial cannulation. INTERVENTIONS: Patients were enrolled and randomized into three groups according to the puncture site: radial artery in the anatomical snuffbox (Group A), radial artery (Group B), and dorsalis pedis artery (Group C). MEASUREMENTS AND MAIN RESULTS: The coprimary outcomes were the first-attempt success rate and puncture duration. CONCLUSIONS: No significant difference was observed in first-attempt success rates among the three groups (Group A: 75%, Group B: 72.5%, and Group C: 52.5%). Group B demonstrated significantly shorter puncture duration than both Group A (p = 0.001) and Group C (p = 0.001). Compared with conventional radial artery and dorsalis pedis artery cannulation, the anatomical snuffbox approach achieves comparable success rates, establishing it as a clinically viable alternative for invasive hemodynamic monitoring.