Weekly ReportSep 14–20, 2026
Anesthesiology, week 38 edition
We read 166 papers and selected 3.
Summary
This week’s anesthesiology research emphasized mechanistic neurobiology, safer perioperative monitoring, and technology-enabled risk reduction. Preclinical studies identified microglial CX3CL1/CX3CR1 signaling as a mediator of repeated neonatal sevoflurane-related hypomyelination and delineated distinct striatal circuits underlying S-ketamine hallucination-like behavior. Clinical and translational studies advanced non-invasive thermal monitoring, pediatric apneic oxygenation, neuromuscular monitoring, teleconsultation, and perioperative prediction models. Overall, the field is moving toward mechanism-informed, multimodal, and individually tailored anesthesia care, although most paradigm-shifting findings remain preclinical or require external validation.
Selected Articles
1. CX3CL1/CX3CR1-dependent microglial phagocytosis of oligodendrocyte precursor cells contributes to sevoflurane-induced myelination impairments in neonatal mice.
In neonatal mice, repeated 2-hour sevoflurane exposure on postnatal days 2–4, but not a single exposure, caused hypomyelination and persistent cognitive and fine motor deficits. The effects were associated with enhanced CX3CL1/CX3CR1 signaling, Rac1-related cytoskeletal changes, and excessive microglial phagocytosis of oligodendrocyte precursor cells. Genetic CX3CR1 deletion attenuated the cellular and behavioral abnormalities.
Impact: This study provides convergent behavioral, cellular, molecular, structural, and genetic evidence linking repeated neonatal sevoflurane exposure to impaired myelination. It identifies a specific and potentially modifiable neuroimmune pathway rather than merely reporting an exposure-outcome association.
Clinical Implications: The findings support caution about repeated early-life anesthesia exposure and motivate development of biomarkers and neuroprotective strategies targeting microglial phagocytosis. They do not establish harm in human infants or justify immediate changes to clinical anesthesia practice.
Key Findings
- Repeated, but not single, neonatal sevoflurane exposure caused hypomyelination and persistent neurobehavioral deficits in mice.
- CX3CL1/CX3CR1 signaling promoted microglial phagocytosis of oligodendrocyte precursor cells.
- CX3CR1 knockout attenuated microglial, myelination, and behavioral abnormalities.
2. A circuit dissection of perception-action decoupling in S-ketamine-induced hallucination-like states.
Using auditory discrimination, AI-based pose analysis, fiber photometry, single-cell calcium imaging, and pathway-specific chemogenetic and optogenetic manipulation, this mouse study separated false auditory threat perception from disorganized behavior during S-ketamine exposure. The basolateral amygdala-to-caudal striatum pathway promoted salience-weighted false threat responses, while the medial prefrontal cortex-to-caudal striatum pathway shaped disorganized actions. Dexmedetomidine restored pathway timing and striatal network coupling.
Impact: The study offers a circuit-level framework for separating perception from behavioral expression in ketamine-related hallucination-like states. Its causal pathway experiments and pharmacologic rescue provide an unusually detailed basis for translational research on emergence phenomena and ketamine-associated behavioral disturbances.
Clinical Implications: The findings support further investigation of dexmedetomidine for ketamine-related perceptual or behavioral disturbances and may inform future studies of emergence delirium. Direct clinical use is premature because the evidence comes from an acute mouse model.
Key Findings
- The basolateral amygdala-to-caudal striatum pathway drove false auditory threat responses.
- The medial prefrontal cortex-to-caudal striatum pathway primarily generated disorganized actions.
- Dexmedetomidine restored pathway timing and network coupling without simply suppressing global neural activity.
3. Clinical applicable skin-interfaced thermal guiding sensor for warning perioperative abnormalities in core body temperature and blood perfusion rate.
This study developed a compact, skin-interfaced platform that estimates core temperature, tissue perfusion, thermal conductivity, and surface heat flux using thermal-guiding materials, heat-transfer modeling, and inversion algorithms. Phantom and human experiments showed errors within ±10% or ±0.1 °C, and perioperative measurements agreed well with invasive esophageal temperature monitoring during laparoscopic surgery. Longer-term monitoring also showed correlation greater than 0.85 with a conventional dual-heat-flux sensor.
Impact: The device addresses a clinically important gap during induction, before invasive temperature probes are placed. Its ability to monitor several physiologic variables non-invasively could enable earlier recognition of thermal and perfusion abnormalities and support individualized warming strategies.
Clinical Implications: After validation in larger and more diverse populations, the sensor could supplement or potentially replace invasive temperature monitoring in selected settings, particularly during induction. Accuracy during shock, vasopressor use, skin abnormalities, and major hemodynamic instability remains to be established.
Key Findings
- The platform non-invasively estimated core temperature, tissue perfusion, thermal conductivity, and surface heat flux.
- Phantom and human experiments showed errors within ±10% or ±0.1 °C.
- Perioperative core-temperature estimates agreed well with invasive esophageal measurements, with longer-term correlation greater than 0.85 against a conventional sensor.