You can do groups of pages with the scansnap. Actually I bought an industrial fujitsu scanner on ebay and it works well for 50 pages at a time.
Usually when you are scanning at the front it is a few pages at a time. In the back they can import the old written records.

Wendell
Pediatrician in Chicago

The patient's expectation is that you have all the answers, sometimes they just don't like the answer you have for them