scholarly journals Sonographic Assessment of the Effects of Mechanical Ventilation on Carotid Flow Time and Volume

Cureus ◽  
2021 ◽  
Author(s):  
Jessica I Schleifer ◽  
Lauren Ann J Selame ◽  
Jorge Short Apellaniz ◽  
Michael Loesche ◽  
Hamid Shokoohi ◽  
...  
Keyword(s):  
Mechanical Ventilation ◽  
Flow Time ◽  
Sonographic Assessment ◽  
Carotid Flow

scholarly journals Correlation of Carotid Blood Flow and Carotid Flow Time With Invasive Cardiac Output Measurements

CHEST Journal ◽  
2016 ◽  
Vol 150 (4) ◽  
pp. 297A
Author(s):  
Irene Ma ◽  
Joshua Caplin ◽  
Aftab Azad ◽  
Christina Wilson ◽  
Michael Fifer ◽  
...  
Keyword(s):  
Blood Flow ◽  
Cardiac Output ◽  
Flow Time ◽  
Carotid Blood Flow ◽  
Cardiac Output Measurements ◽  
Carotid Flow

The diagnostic utility of sonographic carotid flow time in determining volume responsiveness

2017 ◽  
Vol 38 ◽  
pp. 231-235 ◽  
Author(s):  
Hamid Shokoohi ◽  
Grant W. Berry ◽  
Murteza Shahkolahi ◽  
Jackson King ◽  
Jordan King ◽  
...  
Keyword(s):  
Flow Time ◽  
Diagnostic Utility ◽  
Volume Responsiveness ◽  
Carotid Flow

scholarly journals Sonographic assessment of diaphragmatic function as a predictor for weaning from mechanical ventilation

2020 ◽  
Vol 7 (1) ◽  
pp. 74-87
Author(s):  
Sherif Abdel Fattah ◽  
Radwa Elhefny ◽  
Tamer Abdel Mawla ◽  
Afnan Abd El Halim
Keyword(s):  
Mechanical Ventilation ◽  
Weaning From Mechanical Ventilation ◽  
Diaphragmatic Function ◽  
Sonographic Assessment

Carotid Flow Time Changes With Volume Status in Acute Blood Loss

2015 ◽  
Vol 66 (3) ◽  
pp. 277-282.e1 ◽  
Author(s):  
David C. Mackenzie ◽  
Noman A. Khan ◽  
David Blehar ◽  
Scott Glazier ◽  
Yuchiao Chang ◽  
...  
Keyword(s):  
Blood Loss ◽  
Flow Time ◽  
Volume Status ◽  
Acute Blood Loss ◽  
Time Changes ◽  
Carotid Flow

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

2017 ◽  
Vol 37 (6) ◽  
pp. 1397-1402 ◽  
Author(s):  
David C. Mackenzie ◽  
Sabiha Nasrin ◽  
Bita Atika ◽  
Payal Modi ◽  
Nur H. Alam ◽  
...  
Keyword(s):  
Test Performance ◽  
Flow Time ◽  
Time Test ◽  
Carotid Flow

scholarly journals Four Truths of Mechanical Ventilation and the Ten-Fold Path to Enlightenment

2021 ◽  
Vol 2 (3) ◽  
pp. 73-78
Author(s):  
Robert Chatburn
Keyword(s):  
Mechanical Ventilation ◽  
Respiratory System ◽  
Control Variable ◽  
Pressure Control ◽  
Equation Of Motion ◽  
Flow Time ◽  
Volume Control ◽  
Intermittent Mandatory Ventilation ◽  
Time Curve ◽  
Ventilatory Pattern

The Four Truths 1. The truth of confusion 2. The truth of the origin of confusion 3. The truth of the cessation of confusion 4. The truth of the path leading to the cessation of confusion The 10-Fold Path 1. A breath is one cycle of positive flow (inspiration) and negative flow (expiration) defined in terms of the flow-time curve. 2. A breath is assisted if the ventilator does work on the patient. 3. A ventilator assists breathing using either pressure control or volume control based on the equation of motion for the respiratory system. 4. Breaths are classified by the criteria that trigger (start) and cycle (stop) inspiration 5. Trigger and cycle events can be initiated by the patient or the machine. 6. Breaths are classified as spontaneous or mandatory based on both the trigger and cycle events. 7. There are 3 breath sequences: Continuous mandatory ventilation (CMV), Intermittent Mandatory Ventilation (IMV), and Continuous Spontaneous Ventilation (CSV). 8. There are 5 basic ventilatory patterns: VC-CMV, VC-IMV, PC-CMV, PC-IMV, and PC-CSV: 9. Within each ventilatory pattern there are several variations that can be distinguished by their targeting scheme(s). 10. A mode of ventilation is classified according to its control variable, breath sequence, and targeting scheme(s). Keywords: Breath. Trigger, Cycle, Breath sequences, Ventilatory patterns, Mode of ventilation

Comparing Changes in Carotid Flow Time and Stroke Volume Induced by Passive Leg Raising

2018 ◽  
Vol 355 (2) ◽  
pp. 168-173 ◽  
Author(s):  
Bilal Jalil ◽  
Patton Thompson ◽  
Rodrigo Cavallazzi ◽  
Paul Marik ◽  
Jason Mann ◽  
...  
Keyword(s):  
Stroke Volume ◽  
Flow Time ◽  
Passive Leg Raising ◽  
Carotid 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.

Corrected carotid flow time and passive leg raise as a measure of volume status

2019 ◽  
Vol 37 (8) ◽  
pp. 1460-1465 ◽  
Author(s):  
Ralphe Bou Chebl ◽  
Jeffrey Wuhantu ◽  
Shafeek Kiblawi ◽  
Gilbert Abou Dagher ◽  
Hady Zgheib ◽  
...  
Keyword(s):  
Flow Time ◽  
Volume Status ◽  
Passive Leg Raise ◽  
Carotid Flow
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