When do you save an editable form when some of the information has been saved?

I'm designing a webapp that basically is patient tracking. We are in a claimant's "clip board" and it has all of the patients information. There are forms and there are some grids.

We currently cannot autosave.

This is an example of our health history screen. You can edit the grid, without being in edit mode. When you click the edit icon next to a field, you can edit that field.

When you press cancel, after you have edited a grid, do you expect changes to be lost in the grid and the form, only in the grid, or only in the form? See the example on YouTube.