ArticleBMC anesthesiology2026
Preoperative and intraoperative oxygen consumption in patients undergoing lung resection surgery: a retrospective study using cardiopulmonary exercise test and intraoperative data.
Article in BMC anesthesiology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
0 citing papers in PubMed.
No citing paper in PubMed yet.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
7 authors.
Funding
Abstract
backgroundOxygen consumption (VO₂) is a core element of hemodynamic physiology and the metabolic counterpart to oxygen delivery. Modern anesthesia machines enable real-time intraoperative VO₂ estimation, yet its relationship with preoperative metabolic capacity, as characterized by cardiopulmonary exercise testing (CPET), has not been directly examined.
methodsThis study analyzed preoperative CPET and intraoperative data from adult patients ≥ 20 undergoing lung resection under general anesthesia. Intraoperative VO₂ was estimated from minute ventilation and inspired and end-tidal oxygen fractions. Preoperative and intraoperative VO₂ were summarized, and associations between baseline VO₂ and intraoperative suppression were assessed.
resultsData from 32 patients were analyzed. Preoperative VO₂ at rest, anaerobic threshold, and peak exercise were 1.6 ± 0.4, 5.1 ± 1.9, and 6.1 ± 1.7 metabolic equivalents (METs), respectively. The reduction from resting to intraoperative VO₂ (-29.0 ± 19.4%) showed a strong correlation with resting VO₂ (r = 0.770, p < 0.001). Consequently, regardless of preoperative resting VO₂, intraoperative VO₂ converged to a relatively narrow range, averaging 1.1 ± 0.2 METs.
conclusionsIn patients undergoing lung resection, intraoperative VO₂ converged to approximately 1 MET under general anesthesia, largely independent of preoperative resting metabolism. The clinical implications of this observation remain unclear and warrant investigation in larger prospective studies incorporating concurrent measurements of oxygen delivery and clinical outcomes.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.