I am constantly obsessing over fingers and toes in the ICU. They can tell us so much about whether our high-tech machines and drugs are helping to keep our patients’ bodies perfused with oxygenated blood. Some patients’ fingers and toes are warm and pink. Some are cold and black, even falling off. A lot are dirty…really dirty. Like with actual dirt clogged under overgrown nails. I won’t lie and pretend that these nails don’t gross me out a little bit. Or deny that I typically wear gloves when I am touching these patients’ hands or feet.