Overview Study of Transdermal Fentanyl Patch to Treat Postoperative Pain in Total Knee Arthroplasty Status: Completed Trial end date: 2010-12-01 Target enrollment: Participant gender: Summary The purpose of this study is to determine whether transdermal fentanyl patch Phase: Phase 4 Details Lead Sponsor: Khon Kaen UniversityTreatments: Fentanyl