Observational studyBMJ open2025
Comparing predictive accuracy of carotid artery ultrasonography with inferior vena cava ultrasonography for predicting postinduction hypotension in older patients: a prospective observational study.
Observational study in BMJ open, 2025. 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
6 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
objectivesHypotension frequently occurs following the initiation of general anaesthesia, particularly in older individuals, and is linked to adverse postoperative consequences when it is severe. This study was designed to compare the predictive effects of carotid ultrasound measurements and inferior vena cava (IVC) ultrasound measurements on postinduction hypotension (PIH) in older patients.
designProspective observational study.
methodsA total of 102 older adults who were scheduled for elective gastrointestinal surgery were included in the study. Before general anaesthesia induction, maximum IVC diameter (dIVCmax), minimum IVC diameter (dIVCmin), collapsibility index of IVC (IVC-CI), respiratory variation in carotid artery blood flow peak velocity (ΔVpeak) and carotid corrected flow time (FTc) were measured by ultrasound. FTc(B) and FTc(W) were calculated by applying Bazett's formula and Wodey's formula, respectively. Patients were divided into hypotensive and non-hypotension group according to whether the systolic blood pressure (SBP) decreased more than 30% from the baseline or the absolute value of SBP was less than 90 mm Hg within 15 min after anaesthesia induction.
resultsAfter the induction, hypotension was observed in 49% of the patients. The area under the receiver operating characteristics curve (AUROC) of FTc(W), FTc(B) and △Vpeak for predicting PIH were 0.815, 0.691 and 0.713; the optimal cut-off values were 334.7 ms, 348.3 ms and 6.35%, respectively. The AUROC of IVC-CI, dIVCmax and dIVCmin for predicting PIH were 0.666, 0.680 and 0.702; the optimal cut-off values were 46%, 0.985 cm and 0.635 cm, respectively. The AUC of the FTc(W) was significantly higher than that of the FTc(B) (p=0.003), IVC-CI (p=0.024) and dIVCmax (p=0.046).
conclusionsThe FTc(W) values measured by ultrasonography were more accurate for predicting PIH in the older patients as compared with dIVCmax and IVC-CI. Furthermore, the predictive accuracy of FTc(W) is better than FTc(B). TRIAL REGISTRATION NUMBER: ChiCTR2100054532.
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.