Sounds like a great invention, and there are a few different ways to finance it. Much like starting a new business, inventions require capital and additional funding. Here are some ways to achieve that.

Bank Loan - Banks have a hard time loaning for inventions, but drawing up a good proposal will help tip the scales in your favor.

Borrow - You may have to borrow from friends and family at first if you want to avoid going to a bank for a loan.

Government Grants - Many branches of government offer grants for the research and elopement of inventions. Just be surety be specific and go to the right branch (department of health in this case, I assume).

Find an Investor - Venture capitalists are always looking for profitable new ideas to invest in. Put out an ad in the appropriate publication or search for those with some extra money that could help finance your project.

Kick Starter - This site allows for donations to be made to a specific project by offering supporters a variety of prizes. This may be the perfect way to garner online support.

Hope this helps!