The predictive ability of carotid artery corrected flow time and respirophasic variation in blood flow peak velocity measured by ultrasonography for fluid responsiveness in parturients for cesarean delivery

2020 ◽  
Vol 86 (10) ◽  
Author(s):  
Lili Xu ◽  
Shaobing Dai ◽  
Jianjun Shen ◽  
Changcheng Lv ◽  
Yuwen Tang ◽  
...  
Keyword(s):  
Blood Flow ◽  
Carotid Artery ◽  
Cesarean Delivery ◽  
Fluid Responsiveness ◽  
Peak Velocity ◽  
Predictive Ability ◽  
Flow Time ◽  
Corrected Flow Time ◽  
Corrected Flow

scholarly journals Ultrasound Assessment of the Change in Carotid Corrected Flow Time in Fluid Responsiveness in Undifferentiated Shock

2018 ◽  
Vol 46 (11) ◽  
pp. e1040-e1046 ◽  
Author(s):  
Igor Barjaktarevic ◽  
William E. Toppen ◽  
Scott Hu ◽  
Elizabeth Aquije Montoya ◽  
Stephanie Ong ◽  
...  
Keyword(s):  
Fluid Responsiveness ◽  
Flow Time ◽  
Ultrasound Assessment ◽  
Corrected Flow Time ◽  
Corrected Flow

scholarly journals Ability of Carotid Corrected Flow Time to Predict Fluid Responsiveness in Patients Mechanically Ventilated Using Low Tidal Volume after Surgery

2021 ◽  
Vol 10 (12) ◽  
pp. 2676
Author(s):  
Seungho Jung ◽  
Jeongmin Kim ◽  
Sungwon Na ◽  
Won Seok Nam ◽  
Do-Hyeong Kim
Keyword(s):  
Mechanical Ventilation ◽  
Tidal Volume ◽  
Fluid Responsiveness ◽  
Flow Time ◽  
Volume Index ◽  
Predict Fluid Responsiveness ◽  
Low Tidal Volume ◽  
Lower Accuracy ◽  
Corrected Flow Time ◽  
Corrected Flow

Predicting fluid responsiveness in patients under mechanical ventilation with low tidal volume (VT) is challenging. This study evaluated the ability of carotid corrected flow time (FTc) assessed by ultrasound for predicting the fluid responsiveness during low VT ventilation. Patients under postoperative mechanical ventilation and clinically diagnosed with hypovolemia were enrolled. Carotid FTc and pulse pressure variation (PPV) were measured at VT of 6 and 10 mL/kg predicted body weight (PBW). FTc was calculated using both Bazett’s (FTcB) and Wodey’s (FTcW) formulas. Fluid responsiveness was defined as a ≥15% increase in the stroke volume index assessed by FloTrac/Vigileo monitor after administration of 8 mL/kg of balanced crystalloid. Among 36 patients, 16 (44.4%) were fluid responders. The areas under the receiver operating characteristic curves (AUROCs) for the FTcB at VT of 6 and 10 mL/kg PBW were 0.897 (95% confidence interval [95% CI]: 0.750–0.973) and 0.895 (95% CI: 0.748–0.972), respectively. The AUROCs for the FTcW at VT of 6 and 10 mL/kg PBW were 0.875 (95% CI: 0.722–0.961) and 0.891 (95% CI: 0.744–0.970), respectively. However, PPV at VT of 6 mL/kg PBW (AUROC: 0.714, 95% CI: 0.539–0.852) showed significantly lower accuracy than that of PPV at VT of 10 mL/kg PBW (AUROC: 0.867, 95% CI: 0.712–0.957; p = 0.034). Carotid FTc can predict fluid responsiveness better than PPV during low VT ventilation. However, further studies using automated continuous monitoring system are needed before its clinical use.

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