High Quality Content by WIKIPEDIA articles! A medical tricorder is a hypothetical handheld portable scanning device to be used by consumers to self-diagnose medical conditions within seconds and take basic vital measurements. While no physical devices have yet been invented or built, there are numerous reports of scientists and inventors working to create such a device. A common view is that it will be a general-purpose tool similar in functionality to a Swiss Army Knife to take health measurements such as blood pressure and temperature and blood flow in a noninvasive way. It would diagnose a person`s state of health after analyzing the data.