Clinical Evidence

Fluid Management Makes a Difference

FloPatch and Carotid Doppler Validation

Wearable ultrasound for continuous deep-tissue monitoring

Nature Biotechnology

Commentary in Nature Biotech on the state of the art in wearable ultrasound.

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Characterizing a Novel Doppler Starling Curve

journal of intensive care medicine

Rates of preload responsiveness are assessed for patients in 4 quadrants of a “Doppler Starling Curve”: low/high CVP on the x axis and low/high SV on the y axis.

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Unifying Fluid Responsiveness and Tolerance

Critical Care Explorations

An exploration of hemodynamic concepts of “congestion” and “flow”, and their relationship to an ultrasonographic Diamond-Forrester classification.

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Correlation between Carotid Doppler Metrics during Blood Loss and Resuscitation

journal of medical ultrasound

This analysis demonstrates correlation between carotid artery corrected flow time and velocity time integral in a model of haemorrhage. The strength of the correlation increases with the number of consecutive cardiac cycles averaged.

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IVC Measures Do Not Correlate with Carotid Corrected 
Flow Time Change


Exploring the relationship between inspiratory collapse of the inferior vena cava, a non-invasive surrogate for right atrial pressure, and augmentation of stroke volume in response to a preload challenge.

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Correlation between carotid artery and ascending aortic Doppler

British Journal of Anaesthesia

This analysis shows a strong correlation between change in the ascending aortic velocity time integral and change in carotid corrected flow time. The correlation coefficient between these variables increases with the number of consecutively averaged cardiac cycles.

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