I have had the hydascan and my gallbladder was to found with no stones. However, the ejection fraction was 0% I have been experiencing nasuea but no pain. The Dr. said small stones can be in the gallbladder that can not be detected and can irritate the stomach . It has been left in my corner ,so to speak as to ,to have the surgery for removal or not. There is no guranantee this will so solve my problem. I would greatly appreciate any suggestions.