Carotid artery corrected flow time measurement via bedside ultrasonography in monitoring volume status

Hossein‐Nejad, Hooman; Mohammadinejad, Payam; Lessan‐Pezeshki, Mahboob; Davarani, Seyedhossein Seyedhosseini; Banaie, Mohsen

doi:10.1016/j.jcrc.2015.08.014

Cited by 49 publications

(47 citation statements)

References 24 publications

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“…CFT is the carotid systole time, with heart rate correction applied. This measure is easy to perform and may correlate with intravascular volume [22]. CBF is the integral of blood volume that is ejected through the carotid artery with each cardiac cycle.…”

Section: Introductionmentioning

confidence: 99%

Correlation of carotid blood flow and corrected carotid flow time with invasive cardiac output measurements

et al. 2017

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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)2/4 × velocity time integral × heart rate. Measurements were obtained using a single carotid waveform and an average of three carotid waveforms for both measures.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.Electronic supplementary materialThe online version of this article (doi:10.1186/s13089-017-0065-0) contains supplementary material, which is available to authorized users.

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Section: Introductionmentioning

confidence: 99%

Correlation of carotid blood flow and corrected carotid flow time with invasive cardiac output measurements

et al. 2017

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“…Blehar et al [84] also indicated that after fluid administration, although there was a significant change in FTc, there were no changes in mean arterial pressure or heart rate emphasizing the value of using FTc. Although Mackenzie et al [85] studied on blood donors, Hossein-Nejad et al [27] included hemodialysis patients in their study and both studies found a significant relationship showing decreased FTc in response to loss of intravascular volume. Hossein-Nejad et al [27] also indicated that decrease in FTc was significant in both groups of patients with or without a history of anti-hypertensive drug use.…”

Section: Carotid Artery -Corrected Flow Timementioning

confidence: 98%

“…Although Mackenzie et al [85] studied on blood donors, Hossein-Nejad et al [27] included hemodialysis patients in their study and both studies found a significant relationship showing decreased FTc in response to loss of intravascular volume. Hossein-Nejad et al [27] also indicated that decrease in FTc was significant in both groups of patients with or without a history of anti-hypertensive drug use. A study done by Stolz et al [88] to investigate the applicability of Doppler to measure common CA velocity time integral, which is a novel another method for potential use in assessing volume responsiveness, was performed in emergency settings by emergency residents from a single institution to assess volume status.…”

Section: Carotid Artery -Corrected Flow Timementioning

confidence: 98%

“…However, as the meta-analysis indicated, such negative results may be explained by the overall small sample size [25]. Although there are few studies comparing other objective methods (BNP [26], Carotid artery Doppler [27]) with classical methods, further studies with larger sample sizes are needed to establish a significant outcome (Table 1) …”

Section: Dry Weightmentioning

confidence: 99%

“…Corrected flow time (FTc), flow time/√cycle time, calculated by considering heart rate correction is used to evaluate intravascular volume status and FTc was found to be directly correlated with intravascular volume by different studies [27,[84][85][86][87]. Blehar et al [84] and Hilbert et al [86] showed that FTc was increased after intravascular volume expansion.…”

Section: Carotid Artery -Corrected Flow Timementioning

confidence: 99%

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Effects of Volume Overload and Current Techniques for the Assessment of Fluid Status in Patients with Renal Disease

et al. 2018

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Volume overload is an important, may be the foremost, independent prognostic factor determining the outcome of hemodialysis patients. Therefore, it is crucial to measure fluid status of these patients and avoid volume overload. This review aims to evaluate volume overload, its effects on patients with renal diseases and current methodologies measuring volume status in the body. These techniques will be first classified as clinical evaluation and non-clinical and/or instrumental techniques, which includes biomarkers, ultrasonography, relative blood volume monitoring, bioimpedance, echocardiography, pulmonary artery catheterization, esophageal and/or suprasternal Doppler, and blood viscosity. Advantages and limitations of these different techniques will be reviewed extensively by comparing each other. At last, insights gained from this review can highlight the future prospects in this active area of research.

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Carotid Flow Time Test Performance for the Detection of Dehydration in Children With Diarrhea

MacKenzie

Nasrin

Atika

et al. 2017

J of Ultrasound Medicine

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show abstract

Carotid artery corrected flow time measurement via bedside ultrasonography in monitoring volume status

Cited by 49 publications

References 24 publications

Correlation of carotid blood flow and corrected carotid flow time with invasive cardiac output measurements

Correlation of carotid blood flow and corrected carotid flow time with invasive cardiac output measurements

Effects of Volume Overload and Current Techniques for the Assessment of Fluid Status in Patients with Renal Disease

Carotid Flow Time Test Performance for the Detection of Dehydration in Children With Diarrhea

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