Load up the images on SD card, and turn off transmit. What possible HIPAA issues could there be?
If you read the article, you'd know that the images were being "transmitted over wi-fi" during the surgery. I'm guessing that means they were on the guy's Google Drive; but in any case they weren't pre-loaded onto Glass.
And the article also talked about "manually scrubbing" all patient info from the images to comply with privacy guidelines. I have a hard time believing that would be enough - it's not like a surgeon does hundreds of surgeries in a day, it'd be fairly easy to match an image to a patient.
Me, next time I need surgery (hopefully not for a long while) I'm going to ask some pointed questions of my surgeon about this sort of thing beforehand. The concept is great, but I don't want Google to have my innards in their databases - I'm doubtful he's even thought about the bigger privacy picture at all.