ArticleCritical ultrasound journal2017
Correlation of carotid blood flow and corrected carotid flow time with invasive cardiac output measurements.
Article in Critical ultrasound journal, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT05271227 (Assessment Of Volume Responsiveness By Ultrasound Parameters Of Carotid Blood Flow In Patients With Cardiogenic Shock), which is not on this map. Cited by 34 papers, 1 of them a synthesis that pooled it.
What it found
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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.
Assessment Of Volume Responsiveness By Ultrasound Parameters Of Carotid Blood Flow In Patients With Cardiogenic Shock
Who cites it
34 citing papers in PubMed, 1 synthesis or guideline pooled it.
- Role of carotid corrected flow time and peak velocity variation in predicting fluid responsiveness: a systematic review and meta-analysis.Korean journal of anesthesiology · 2023Pooled it
- Does helmet CPAP reduce carotid flow compared to oronasal mask CPAP? A randomized cross-over trial in healthy subjects.Internal and emergency medicine · 2025Trial
- Carotid corrected flow time as a sensitive indicator for early diagnosis and dynamic monitoring of hemorrhagic shock: A translational study from porcine model to clinical practice.Chinese journal of traumatology = Zhonghua chuang shang za zhi · 2026Article
- Hemodynamic assessment of the common carotid artery and radial artery in healthy human subjects: a comparison of continuous wave patch ultrasound and conventional pulse wave ultrasound.Journal of ultrasound · 2026Article
- Carotid Doppler and IVC metrics for volume and mortality assessment in septic shock.The Libyan journal of medicine · 2025Observational
- Correlation between carotid Doppler ultrasound-derived parameters and cardiac output measurements: a systematic review and meta-analysis.Quantitative imaging in medicine and surgery · 2025Article
- Carotid Doppler Imaging as a Marker for Fluid Responsiveness.Journal of clinical medicine · 2025Article
- The Effect of Thyroid Lobe Volume on the Common Carotid Artery Blood Flow in Thyroidectomy Position.Journal of clinical medicine · 2025Article
- Correlation and concordance of carotid Doppler ultrasound and echocardiography with invasive cardiac output measurement in critically ill patients.Intensive care medicine experimental · 2024Article
- The predictive role of carotid artery flow time for anesthesia-induced hypotension in high-risk elderly patients.Journal of clinical monitoring and computing · 2024Article
- The Reliability of Carotid Artery Doppler Ultrasonography Indices in Predicting Fluid Responsiveness during Surgery for Geriatric Patients: A Prospective, Observational Study.Healthcare (Basel, Switzerland) · 2024Article
- Passive leg raising test using the carotid flow velocity-time integral to predict fluid responsiveness.Journal of ultrasound · 2024Article
- Predicting fluid responsiveness in spontaneously breathing parturients undergoing caesarean section via carotid artery blood flow and velocity time integral measured by carotid ultrasound: a prospective cohort study.BMC pregnancy and childbirth · 2024Article
- Article
- Detecting the Change in Total Circulatory Flow with a Wireless, Wearable Doppler Ultrasound Patch: A Pilot Study.Critical care explorations · 2023Article
- Carotid flow as a surrogate of the left ventricular stroke volume.Journal of clinical monitoring and computing · 2023Observational
- Evaluating corrected carotid flow time as a non-invasive parameter for trending cardiac output and stroke volume in cardiac surgery patients.Journal of ultrasound · 2023Observational
- Carotid Flow Time Compared with Invasive Monitoring as a Predictor of Volume Responsiveness in ICU patients.POCUS journal · 2023Article
- Ultrasonographic Carotid Artery Flow Measurements as Predictors of Spinal Anesthesia-Induced Hypotension in Elderly Patients: A Prospective Observational Study.Medical science monitor : international medical journal of experimental and clinical research · 2022Observational
- Carotid Doppler Ultrasonography for Hemodynamic Assessment in Critically Ill Children.Pediatric cardiology · 2022Article
Corrections and comments
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Authors and funding
8 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundNon-invasive measures that can accurately estimate cardiac output may help identify volume-responsive patients. This study seeks to compare two non-invasive measures (corrected carotid flow time and carotid blood flow) and their correlations with invasive reference measurements of cardiac output. Consenting adult patients (n = 51) at Massachusetts General Hospital cardiac catheterization laboratory undergoing right heart catheterization between February and April 2016 were included. Carotid ultrasound images were obtained concurrently with cardiac output measurements, obtained by the thermodilution method in the absence of severe tricuspid regurgitation and by the Fick oxygen method otherwise. Corrected carotid flow time was calculated as systole time/√cycle time. Carotid blood flow was calculated as π × (carotid diameter)
resultsSingle waveform measurements of corrected flow time did not correlate with cardiac output (ρ = 0.25, 95% CI -0.03 to 0.49, p = 0.08), but an average of three waveforms correlated significantly, although weakly (ρ = 0.29, 95% CI 0.02-0.53, p = 0.046). Carotid blood flow measurements correlated moderately with cardiac output regardless of if single waveform or an average of three waveforms were used: ρ = 0.44, 95% CI 0.18-0.63, p = 0.004, and ρ = 0.41, 95% CI 0.16-0.62, p = 0.004, respectively.
conclusionsCarotid blood flow may be a better marker of cardiac output and less subject to measurements issues than corrected carotid flow time.
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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.