Cataract surgery

My husband recently had cataract surgery on his right eye. He had his left eye done in 2012 and he was completely under. The same hospital did both surgeries. With the right eye surgery, the anesthesiologist insisted on twilight sleep rather than being put under. The reason my husband insists on being put under is because he routinely sits up or wakes up during surgery. So my husband reluctantly agreed to have this surgery with twilight sleep. Needless to say he woke up during surgery with excruciating pain and screaming in agony. He is unsure what happened but they gave him a proportionate amount of extra anesthesia to knock him out momentarily. He went to his eye appointment the next day and everything seemed ok. It went downhill from there. He vomited Saturday and Sunday. I called the clinic and they were not concerned. On the following Monday he went to the Veterans Administration with flu like symptoms. One week after surgery, his sugar skyrocketed to 590 and he had to be seen at the VA again. The very next day he started having seizures and had to be hospitalized. All his tests have been negative. Has anyone else had this issue?