If medical result not available on the interview date, no panic.
You can submit it through any CITIC Bank ( zhong xin yin hang).
You need to fill up 2 copies of the document list when submitting medical result.
http://ustraveldocs.com/cn_zh/20140328%20IV%20Documentation%20Submission%20Letter%20CN.pdf
Prepare a big evelope,submit
1. her passport
2. medical result
3. Two copies of document list.
CITIC Bank seal the envelop, not yourself.