Aug 13, 2018 Surprise finding: For very sick elderly, lighter sedation won't drop risk of postoperative delirium ... Surprise finding: For very sick elderly, lighter sedation won’t drop risk of postoperative delirium …Newswise | August 13, 2018. Johns Hopkins Medicine researchers say a study designed to see if reducing the amount of anesthesia reduces the risk ... read morePublished on 2018-08-13