Box-sized Sensor Brings Portable, Noninvasive Fluid Monitoring to the Bedside: Study

by Colleen Fleiss on July 25, 2019 at 7:56 PM

A new portable device developed by Lina Colucci and colleagues accurately detected excess fluid buildup in the legs of seven participants with end-stage kidney failure within 45 seconds.

Their device is based on the same technology as that of larger MRI machines, but can take measurements at a fraction of the time and cost, indicating it could help prevent complications in patients with excess fluid levels.

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‘Fluid buildup, which impacts over six million people in the U.S., occurs in conditions such as kidney and congestive heart failure and costs the U.S. more than $35 billion annually.’

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Treating patients with fluid buildup requires striking a delicate balance; removing too little fluid leaves them at risk of hypertension and heart failure, while removing too much leads to muscle cramps and low blood pressure.

Current imaging techniques such as MRI machines are expensive and can only be used in hospitals, making them impractical for routine use.

Lina Colucci and colleagues created an alternative, non-imaging tool based on portable nuclear magnetic resonance (NMR) sensors, which can noninvasively assess fluids and their environment.

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Their platform contains a single-sided NMR sensor harboring 180 individual magnets, and was found to provide accurate measurements of leg fluid buildup when applied to seven participants with end-stage kidney disease, which were matched by results from an MRI machine and an FDA-approved device that estimates body fat and muscle mass.

The authors believe their platform's portability and ease-of-use could allow clinicians to track fluid buildup at the bedside in a manner not possible with larger machines.

Source: Eurekalert

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