What about a more radical model (just off the top of my head after reading these recent posts):-
1) A third-party company sets up a Library in a nice location in the hospital (near to the customers, and all the rest).
2) They purchase equipment usually found in a Library (pumps
etc.) off the wards at true market value (that is, not much ... for those who don't know what that is - visit the Hilditch auctions to gain an insight).
3) Extra (new, and in sufficient quantity) equipment is purchased as need be. Remember that the Library owns the equipment, literally.
4) The Library is stocked ... then equipment is hired out, as suggested above (just like you do with tool hire).
5) Part of the deal is that biomed services the kit at set intervals, and they get paid for this. They also get paid for carrying out repairs to Library equipment on a priority basis.
How does that sound?

If the customers want (demand) more ... like deliveries, collections or even a 24x7 service - no problem. They just get charged at Premium Rates!