What is the power of a 24V DC medical device? I'd like to have a DC 24V outlet, but I don't know what model to go with.

Depends on what kind of equipment you have. A typical device (like a monitor with printing) has a current of about 2A. Different manufacturers use different sockets. You can contact the manufacturer for details. Or buy the power supply directly from the manufacturer, which is safer than the power supply in the market. The production requirements and standards for medical devices are much higher than those for general civilian appliances.