Breath Sensor for Chronic Kidney Disease Detection

In a groundbreaking development, researchers have integrated a breath sensor for chronic kidney disease (CKD) into the everyday surgical face mask—potentially transforming how we detect and manage this silent but serious condition.

Chronic kidney disease affects an estimated 35 million Americans, with many more likely undiagnosed. Currently, CKD detection relies on blood or urine tests, which may not be accessible for everyone or practical for early-stage screening. This new innovation promises a non-invasive, affordable, and user-friendly alternative.

How the Breath Sensor Works

The innovative sensor was developed by Corrado Di Natale and his team and functions by detecting volatile metabolites in a person’s breath—specifically ammonia, ethanol, propanol, and acetone, which are commonly elevated in CKD patients.

Researchers coated silver electrodes with a conductive polymer modified with porphyrins—molecules highly sensitive to volatile compounds. These electrodes were embedded between the layers of a surgical mask and connected to an electronic readout device. When CKD-associated gases interact with the polymer, they cause a measurable electrical resistance change, indicating the presence of the disease.

Impressive Accuracy in Early Testing

In a clinical trial involving 100 individuals—half with CKD and half without—the breath sensor for chronic kidney disease demonstrated remarkable accuracy. It correctly identified CKD in 84% of diagnosed patients (true positives) and accurately ruled out the disease in 88% of healthy participants (true negatives).

Even more promising, the data showed potential to estimate the stage of CKD, providing critical insights for early intervention and disease management.

A New Era for CKD Monitoring

This wearable diagnostic device could revolutionize CKD monitoring, particularly for underserved populations and early-stage detection. According to study coauthors Sergio Bernardini and Annalisa Noce, this technology could “enhance the management of CKD patients by facilitating timely identification of changes in disease progression.”

As we move into an age where wearable health technology is becoming mainstream, the breath sensor for chronic kidney disease marks a pivotal step forward—offering simplicity, precision, and hope.

For more information: Capuano, R., et al. (2025) Disposable Sensor Array Embedded in Facemasks for the Identification of Chronic Kidney Disease. ACS Sensors. doi.org/10.1021/acssensors.4c03227.