If she sees this it may be of help, I hope she can contact her son or other family members.
sample/example of medical power of attorney form and records request form
Medical Power of Attorney Form
http://www.expertlaw.com/library/est..._attorney.html
Who May Request Medical Records and Who Must Share Them
[You must be the patient, or the parent or guardian of the patient for whom you seek records. Caregivers may be able to access records if the patient has provided written permission to the provider.
The US Department of Health and Human Services provides good background information for understand who may, or may not, have access to your records.]
http://patients.about.com/od/yourmed...medrecords.htm