30-Second Takeaway
- Continuous unblinded ward monitoring meaningfully reduces early postoperative hypoxemia versus intermittent checks after noncardiac surgery.
- Ketamine offers only modest, transient MAP advantages over propofol for ICU rapid sequence intubation, questioning reflex ketamine use.
- AI models using routine vital signs can accurately forecast intraoperative hypotension, but need prospective testing before adoption.
- Regional and paravertebral techniques yield modest opioid-sparing and antiemetic benefits; liposomal bupivacaine meaningfully prolongs thoracic block duration.
- Individualized blood pressure and renal-risk assessment (MAP 85–95 mmHg; cystatin C–creatinine eGFR gap) may refine perioperative risk targeting.
Week ending March 28, 2026
Perioperative hemodynamics, monitoring innovations, and analgesic strategies: what matters for anesthesiologists now
Continuous unblinded ward monitoring cuts early postoperative hypoxemia after noncardiac surgery
In this cluster randomized crossover trial, unblinded continuous vital sign monitoring reduced postoperative hypoxemia duration versus intermittent monitoring after noncardiac surgery. Alerts at SpO2 <90%, MAP <65 mmHg, and HR >110/min were sent to treating teams only during unblinded periods. Continuously monitored patients spent roughly 30 fewer minutes with oxygen saturation <90% over 48 hours than intermittently monitored patients. The trial suggests that real-time ward monitoring with actionable alerts can meaningfully decrease occult desaturation in high-risk surgical patients.
Ketamine offers limited hemodynamic advantage over propofol for ICU rapid sequence intubation
This randomized ICU trial compared ketamine versus propofol for rapid sequence intubation in critically ill adults. The lowest MAP within 10 minutes was slightly higher with ketamine than propofol, but the difference was small and borderline significant. Cardiovascular collapse rates and short-term mortality were similar between groups, despite traditional concerns about propofol-induced hypotension. Average MAP over the first hour did not differ meaningfully, suggesting sedative choice should consider broader factors than perceived hemodynamic superiority. These data challenge automatic preference for ketamine solely to avoid post-induction hypotension in critically ill patients.
Transformer model predicts intraoperative hypotension and links hypotension burden to kidney injury
This retrospective study developed a Transformer-based model using routine intraoperative vital sign time-series from over 300,000 surgical cases. The model predicted intraoperative hypotension 5–15 minutes ahead with AUCs around 0.90 and high recall, outperforming XGBoost on sensitivity and calibration. External validation showed similar discrimination and acceptable generalizability across hospitals. Greater cumulative MAP burden ≤65 mmHg was independently associated with higher postoperative AKI and acute kidney disease risk. These findings support IOH burden as clinically important and suggest AI early-warning tools could prioritize sensitivity for preventing hypotension-related renal injury.
References
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Additional Reads
Optional additional studies from this edition.