The Poc-Doc is a simple and small tool that you simply put in your pocket for all your health needs. In extreme cases, it can perform surgery on the spot. In non-urgent cases, it can perform routine tests that check for radiation or perform check-up tasks such as finding blood pressure. It is a small tool, but is very dense with its many uses. It even has a razor and a scalpel. It would be a very great asset to any astronaut on Mars.