“…There are two schools of thought regarding the use of vacuum drainage after TKA: to use indwelling vacuum drainage in the intraarticular space [18,22,29,44] or to not use any form of vacuum drainage [1,3,10,15,20,23,28,30,35,36]. Intraarticular placement of a vacuum drain can reduce undesirable blood accumulation and thus prevent intraarticular or subcutaneous hematoma formation [18,22,29,30].…”