NCT02843477

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

• Status: Completed
• Phase: —
• Study type: Observational
• Enrollment: 54 (actual)
• Sponsor: Yonsei University · Academic / Other
• Sex: All
• Age: 19 Years – 80 Years
• Healthy volunteers: Not accepted

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

• Brain Tumor

Interventions

Type	Name	Description
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).

Timeline

• Start date: 2016-08-09
• Primary completion: 2017-02-28
• Completion: 2017-02-28
• First posted: 2016-07-25
• Last updated: 2018-07-17

Locations

1 site across 1 country: South Korea