Pulse oximetry is a key technology, providing a quick, non-invasive way to estimate blood oxygen levels. But one issue with this tool is that it can overestimate oxygen levels in patients with darker skin pigmentation, which means they can appear less sick than they are, leading to delays in receiving treatments. Ashraf Fawzy, MD, MPH, Johns Hopkins Medicine, and host Eddie Qian, MD, Vanderbilt University, discuss how this disparity can affect patient care, the push to develop more broadly-tested equitable tools, and more on this episode of the ATS Breathe Easy podcast.