Evaluation of Corrected Carotid Artery Flow Time as a Predictor of Fluid Responsiveness in Spontaneous Breathing Patients
|ClinicalTrials.gov Identifier: NCT02843477|
Recruitment Status : Completed
First Posted : July 25, 2016
Last Update Posted : July 17, 2018
|Condition or disease||Intervention/treatment|
|Brain Tumor||Device: ultrasonographic measurement of corrected flow time in carotid artery|
|Study Type :||Observational|
|Actual Enrollment :||54 participants|
|Actual Study Start Date :||August 9, 2016|
|Actual Primary Completion Date :||February 28, 2017|
|Actual Study Completion Date :||February 28, 2017|
Fluid loading group
Spontaneously breathing patients before induction of general anesthesia who receive fluid loading
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).
- ultrasonographic measurement of corrected flow time in carotid artery [ Time Frame: right before fluid loading ]The ultrasonographic measurement of corrected flow time in carotid artery will be performed before fluid loading.
- ultrasonographic measurement of corrected flow time in carotid artery [ Time Frame: 5 minutes after fluid loading ]The ultrasonographic measurement of corrected flow time in carotid artery will be performed 5 minutes after fluid loading.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT02843477
|Korea, Republic of|
|Department of Anesthesiology and Pain Medicine, Anesthesia and Pain Research Institue, Yonsei Universiy College of Medicine|
|Seoul, Korea, Republic of, 03722|