Bespoke diagnostic testing on the horizon

This technology, which can be 3D-printed in only 30 minutes, offers a significant advancement in on-the-spot testing accessibility.

Published in the journal Advanced Materials, the study details the creation of capillaric chips, which function as miniature laboratories. These chips differ from conventional computer microprocessors in that they are designed for single use and do not require an external power source. Instead, they operate through capillary action, similar to how a liquid spills on a table is absorbed by a paper towel.

The COVID-19 pandemic underscored the importance of at-home testing. While rapid tests are helpful, their availability is limited and they can only process one liquid across the strip, leading to most diagnostics still being conducted in central labs. The capillaric chips, however, can be 3D-printed for various tests, including COVID-19 antibody quantification, offering a more versatile solution.

Though promising, the path to widespread application of these 3D-printed home diagnostics still faces hurdles such as regulatory approvals and the acquisition of necessary testing materials. The McGill team is actively seeking to overcome these challenges, working towards adapting their technology for use with affordable 3D printers. This innovation aims to expedite diagnoses, improve patient care, and herald a new era of accessible testing.