ArticleBMC cardiovascular disorders2026
Perioperative changes in diaphragm thickening fraction in cardiac surgery patients.
Article in BMC cardiovascular disorders, 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
2 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
introductionDiaphragmatic dysfunction is a recognized contributor to postoperative respiratory complications following cardiac surgery. Diaphragm ultrasonography has been proposed as a bedside tool to assess diaphragm function.
methodsIn this prospective study, 133 patients undergoing elective cardiac surgery were evaluated. Diaphragm thickening fraction (TF) was measured using ultrasound one day before and one day after surgery. The perioperative change in TF (ΔTF) was also calculated. The primary outcome was ICU length of stay. Multivariable linear regression analysis was performed to assess independent associations.
resultsPostoperative TF values decreased compared to preoperative measurements. In unadjusted analyses, diaphragm thickening fraction was not significantly associated with extubation time or ICU length of stay. Multivariable analysis demonstrated that cardiopulmonary bypass time and cross-clamp duration were independently associated with ICU stay, whereas diaphragm thickening fraction parameters were not independently associated with ICU length of stay. No significant correlation was observed between TF parameters and extubation time. ROC analysis showed limited discriminative ability of TF for predicting ICU stay (AUC < 0.70). In exploratory analysis, higher ΔTF (≥76%) was associated with shorter ICU stay; however, this finding was not confirmed after adjustment.
conclusionDiaphragm thickening fraction was not an independent predictor of ICU length of stay in patients undergoing cardiac surgery. TF may reflect perioperative physiological changes rather than serve as a standalone prognostic marker.
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.