Niagara Falls, Ontario—The addition of perineural dexamethasone may significantly prolong the duration of interscalene block over IV administration of the adjuvant, but this benefit likely is not enough to overcome the potential for adverse effects. Researchers found little difference between 4- and 8-mg doses of dexamethasone on block prolongation.
“Although interscalene block is known to provide effective analgesia for shoulder surgery, it has limited duration—often less than