This Week in Anesthesiology — Oct 5, 2026

This AudioScholar briefing is generated by artificial intelligence for healthcare professionals and trainees. It is not medical advice.

Welcome to This Week in Anesthesiology. This week we're covering 10 notable papers spanning airway management and infection control, perioperative exposures that shape risk and drug requirements, and new tools for procedures, monitoring and regional analgesia. Let's dive in.

Airway management is having a reflective week, with three papers questioning how we describe, choose and protect around airway interventions. In Anaesthesia, Fernández-Vaquero and colleagues ran a prospective observational study across 44 hospitals, analysing more than five thousand videolaryngoscopic intubations, each rated independently by the operator and an observer using a three-part framework covering blade geometry, glottic view by percentage of glottic opening, and ease of tube delivery [1]. Agreement between raters was high. The central finding is a dissociation between seeing and doing. About a quarter of intubations with a poor view were still rated easy, while roughly one in ten intubations with an adequate view were difficult or failed. Even with an excellent view of more than three quarters of the glottis, about six percent of initial attempts were difficult or failed. The authors argue that documenting glottic view alone misrepresents what actually happened, and that recording what was used, what was seen and what was done would communicate airway difficulty more faithfully. This is a documentation and classification study rather than an outcomes trial, but it challenges a habit embedded in most airway records. Turning to children, the British Journal of Anaesthesia published a report from the Japanese paediatric difficult airway registry led by Uchinami, looking at nearly five thousand anaesthetic encounters in children with airway hyperresponsiveness, meaning a current or recent upper respiratory infection, an asthma exacerbation, or household smoke exposure [2]. Using propensity weighting, supraglottic airway placement at induction was associated with less than half the risk of respiratory adverse events compared with tracheal intubation, and a similar reduction in severe desaturation. The data are retrospective, and the authors themselves acknowledge residual confounding, since sicker or more complex children may preferentially have been intubated. The finding supports supraglottic devices as a reasonable option in this group when clinically appropriate, but it is not randomised evidence. Also in the British Journal of Anaesthesia, Shrimpton, Cook and colleagues discuss Scotland's revised infection control guidance, which drops the droplet versus airborne distinction in favour of a single concept of air transmission and removes the list of aerosol-generating procedures entirely [3]. The authors point to pandemic-era aerosol studies showing that tracheal intubation produces little or no respiratory aerosol, substantially less than talking or coughing. They stress that this does not mean less protection, but rather precautions based on the likely pathogen, the patient's respiratory activity, staff exposure and the environment. This is a commentary rather than new data, but it signals a policy shift that may reach other jurisdictions before the next pandemic.

Our second theme concerns perioperative exposures, from blood pressure to opioids to cannabis, that may shift risk or drug requirements. In Anaesthesia, Wang and colleagues analysed more than 150,000 adults having non-cardiac surgery under general anaesthesia at three Chinese hospitals, testing a dozen definitions of intraoperative hypotension against 30-day postoperative pneumonia, which occurred in about two percent of patients [4]. Relative falls from baseline mean arterial pressure tracked pneumonia more consistently than absolute thresholds, which largely lost their association after adjustment. At a twenty percent fall from baseline, the presence of hypotension was associated with roughly a ten percent higher risk of pneumonia, and each additional episode added a little more. Depth and recurrence mattered more than duration, and the risk rose quickly at low exposure before plateauing. The effect sizes are modest and the design is retrospective, so causation is not established, but the authors suggest that keeping pressure close to a patient's own baseline may matter more for the lungs than any fixed number. In the British Journal of Anaesthesia, Ratajczak and colleagues examined more than 340,000 adults at a single Boston centre over sixteen years to ask whether cannabis users need more anaesthetic [5]. Both non-medical and medical cannabis use were associated with higher propofol infusion doses during sedation, with daily recreational users needing about eight micrograms per kilogram per minute more, and with higher volatile requirements during general anaesthesia, although the volatile difference was only about one or two hundredths of a minimum alveolar concentration. Non-medical users also had a slightly greater heart rate rise after intubation. The authors emphasise that these effects are smaller than earlier reports suggested, and that their clinical relevance is still unclear. Finally on this theme, Anesthesiology published a population-based Ontario study by Tierney and colleagues of more than a quarter of a million hip and knee arthroplasty patients, about twelve percent of whom filled a new extended-release opioid prescription after discharge despite guidance discouraging it [6]. About six percent of patients receiving these prescriptions developed persistent postoperative opioid use. After weighting, filling such a prescription was linked to slightly higher odds of persistent use, readmission and emergency department visits, in the range of a ten to fifteen percent increase. Somewhat surprisingly, one-year health system costs were about thirteen percent lower, and days alive at home were marginally higher. The authors conclude that the small but consistent clinical harms, set against the broader opioid crisis, reinforce caution with postoperative extended-release opioids, while the cost finding remains unexplained and deserves scrutiny.

Our final theme covers technology, monitoring and regional techniques, with a strong ultrasound thread. In the Journal of Clinical Anesthesia, Wang and colleagues randomised 124 adults needing central venous catheters to ultrasound guidance on a standard screen or via smart glasses that place the image in the operator's line of sight [7]. Overall procedure time fell by a median of about 26 seconds with smart glasses, with fewer needle redirections, but success and complication rates were no different. The authors describe the gain as modest and possibly most relevant to novices, and call for larger studies across more varied operators. Also on ultrasound, the Canadian Journal of Anesthesia published a single-centre pilot by Erbetta and colleagues in which novice trainees performed lung ultrasound to detect pneumothorax after chest tube removal following cardiac surgery [8]. Among 60 enrolled patients, nearly a third had a pneumothorax by the composite reference standard. Novice ultrasound picked up 18 of 19 cases, whereas radiologist-reviewed chest radiography detected 13, and interrater agreement was very high. As a feasibility study with a small sample, it cannot establish diagnostic superiority, but it supports a properly powered trial. Turning to paediatric monitoring, a scoping review in the Journal of Clinical Anesthesia by van der Leeden and colleagues synthesised 76 studies on neuromuscular monitoring in children under two years [9]. The field has moved from mechanomyography towards electromyography and acceleromyography, and the review concludes that paediatric-specific electromyography devices or tri-axial acceleromyography at the ulnar nerve perform best in neonates and small infants. It highlights careful preparation, calibration, sometimes manual determination of supramaximal current, and train-of-four thresholds interpreted in light of developmental stage, with monitoring continued until recovery is objectively confirmed. This is descriptive synthesis, not comparative outcome evidence. And in Regional Anesthesia and Pain Medicine, Polshin and colleagues compared thoracic paravertebral and erector spinae plane blocks in 404 patients having minimally invasive thoracic surgery at one Boston centre [10]. After adjustment, paravertebral block was associated with about nine milligrams less oral morphine equivalent in recovery, roughly two hours less in the recovery unit, and about one day shorter hospital stay. One oddity is that time to first opioid was slightly shorter with paravertebral block. With an unbalanced, retrospective cohort, the authors present this as a rationale for prospective trials rather than a verdict, but it questions the assumption that the technically easier erector spinae block is an equivalent substitute.

If you only have time for one paper this week, make it the hypotension and pneumonia study in Anaesthesia [4]. It reopens the question of whether fixed blood pressure thresholds are the right target at all, extending the case for individualised, baseline-relative pressure management from kidney and heart outcomes to the lungs.

Here is what this week's evidence adds up to in Anesthesiology. First, large observational data now link relative, not absolute, intraoperative hypotension with postoperative pneumonia, though the effect is modest and still awaits trial confirmation. Second, a good videolaryngoscopic view does not guarantee an easy intubation, and a multicentre study supports richer documentation than glottic view alone. Third, in children with reactive airways, supraglottic devices are associated with substantially fewer respiratory events than intubation, but residual confounding means randomised evidence is still lacking. Fourth, cannabis use is associated with only small increases in anaesthetic requirements, and new extended-release opioids after arthroplasty with small increases in harm, both from retrospective data. And finally, ultrasound tools, from smart glasses to novice lung scanning, show promise in early studies, while the paravertebral versus erector spinae question remains open pending prospective trials.

That's your roundup for This Week in Anesthesiology. The full transcript and references are available on the episode page in your AudioScholar library. This is an AI-curated summary — for clinical decisions, always consult primary sources and current guidelines. See you next week.

If this weekly briefing is useful, follow the show in your podcast app so new episodes arrive automatically. And if you have a paper you have been meaning to read, upload the PDF, or paste any link, at audioscholar dot C C. We will turn it into audio like this one, in any of thirty-one languages.

This is an automated summary generated by artificial intelligence, which can make mistakes. Always review the original source materials.