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DocApprovED: Math in Medicine Made Simple

Mohseni, Alex MD

doi: 10.1097/01.EEM.0000521604.85539.65

Dr. Mohseni is an emergency physician in the Washington, D.C., metropolitan area and the chief innovation officer of Emergency Medicine Associates. He is the editor of his own blog, Follow him on Twitter @amohseni, and read his past columns at



The purpose of most technology is to make our lives easier. Medical calculators reduce the uncertainty and variability in the practice of medicine. The challenge for most providers is keeping up-to-date with all the different equations, scores, and severity indices, not to mention their indications, caveats, and exceptions.

Graham Walker, MD, the founder of MDCalc and a columnist for Emergency Medicine News, and his team have created what is arguably the best suite of medical calculators on the market. They understand that context matters. An equation is only valuable if you know the appropriate context within which to apply it.

MDCalc is a mobile and web app (available on iOS and Android) that provides all the context you need to understand the appropriate indications and applications of medical calculators in a simple and beautiful interface. Every calculator has brief contextual information and details on how to use the calculator appropriately as well as caveats, exceptions, links to the primary reference, and next steps after using the calculator.

MDCalc also recognizes that sometimes we don't know if a calculator even exists for our patient's medical condition, so they created a great way to solve the search and discovery challenge. It will even tell you that a certain calculator has since been supplanted by a more accurate or powerful calculator. MDCalc is also building a scoring system so you can see which calculators are recommended by your peers.

MDCalc is free and updates automatically. It is an indispensable tool in every ED provider's toolbox.

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