If there are only 10 can't you just go into the patient and delete from imported items screen. Once you put in password on the first one it doesn't prompt for password on remaining ones.
You could also browse to the folder they are stored in and delete from there then run the utility that would look for missing links and remove them. (But this will take a lot longer than deleting 10 labs). Now if you had imported a couple hundred to multiple patients then searching based on file date and deleting in mass may be worthwhile but for 10 not so much.
