I am very sorry to learn of your NER
Regrettably I am unsure what you can actually do about it. The checklists clearly say that any work experience you are claiming must be supported by a work reference letter which includes the duties. Now, if that work experience is only for points, and not for assessment for the 1 year's minimum experience in the 29 in-demand occupations - then refusing to count the work for lack of duty descriptions does seem a bit mean. But I guess from their point of view they are trying to stamp out the possibility of forged work references.
I think the only thing you can do, even though they have said new information will not be considered, is to try to get a work reference from this hospital within the next few days, and then mercy plea a fax anyway apologising for the omitted duties and ask them if they could please re-open your case.
But it is a long shot!
The alternative is to start preparing a fresh application ready for 1st July 2011 with the new rules. Since CIO are turning over applications and sending them to visa office within a month or so, you should get a pretty fast response if you re-apply in July.
Best of luck,
Wayne.