Among the many sources of investment (in principle, anyway) in medical technology are venture capital firms and angel investors.  Given their nature as typically more private individuals whose investments are not as readily reported, since the source of funding is less likely to be part of a publicly reported fund, their investments frequently slip under the radar.  However, at $9.1 billion in investment for the first two quarters of 2009, it is an amount that should be on everyone's radar screen.

I came across this item in Medical Product Outsourcing on an angel investment report:

Medical device, equipment and healthcare services market segments made up the largest share of angel investments in the first half of 2009, at 28 percent, according to a study released by the Center for Venture Research at the University of New Hampshire.

(Since I track venture investment, one segment of interest is angel investors.  Here is my list of groups that are in the Angel Capital Association.  It is a relatively fluid list, with members coming and going, but has held steady in membership for the several years I have tracked them.)