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Evaluation of Corrected Carotid Artery Flow Time as a Predictor of Fluid Responsiveness in Spontaneous Breathing Patients

NCT02843477 · Status: COMPLETED · Type: OBSERVATIONAL · Enrollment: 54

Last updated 2018-07-17

No results posted yet for this study

Summary

It is still challenging to assess intravascular volume status in spontaneously breathing patients. Recently, the measurement of corrected flow time in carotid artery was introduced as quite useful, simple and noninvasive for the evaluation of circulating blood volume change. The aim of this study is to evaluate whether corrected carotid artery flow time as determined by ultrasonography can be a predictor of fluid responsiveness in spontaneously breathing patients before induction of general anesthesia.

Conditions

Interventions

DEVICE

ultrasonographic measurement of corrected flow time in carotid artery

Corrected carotid artery flow time is measured using 10-5 MHz linear probe on a portable ultrasound machine. On the two-dimensional image, the optimal image of the long-axis view is obtained at the left common carotid artery. The sample volume is placed on the center of the lumen, 2 cm proximal to the bulb, and a pulsed wave Doppler examination was performed while the Doppler beams were adjusted to ensure \< 60° of angle for the best signal. Then, cardiac cycle time and carotid flow time is measured. Carotid flow time is measured between the upstroke of the flow tracing and the dicrotic notch, and it is corrected for pulse rate by dividing flow time by the square root of the cardiac cycle time to calculate corrected carotid artery flow time (flow time/√cycle time).

Sponsors & Collaborators

  • Yonsei University

    lead OTHER

Eligibility

Min Age
19 Years
Max Age
80 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2016-08-09
Primary Completion
2017-02-28
Completion
2017-02-28

Countries

  • South Korea

Study Locations

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Entities

Diseases

Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT02843477 on ClinicalTrials.gov