The Pennsylvania Patient Safety Authority analyzed 83 wrong-site extremity procedures within the domain of orthopedic surgery reported over a nine-year period, representing 15% of the 541 reports of wrong-site operating room procedures in Pennsylvania hospitals and ambulatory surgical facilities from July 2004 through June 2013. The most common body parts involved were the hand (6% of all 541 reports), the knee (5%), and the foot (3%). All 34 wrong-site hand procedures were initiated at the wrong site on the correct hand; 12 involved operating on an adjacent finger, and 9 involved making an incision for a carpal tunnel release instead of an intended trigger finger release. Most (92%) of the 25 wrong-site knee procedures were performed on the wrong knee. The 14 wrong-site foot procedures were a mix of both the wrong foot and the wrong site on the correct foot. Overall, 18 wrong-site procedures on the legs involved the injection of local anesthetic into the knee joint or foot at the beginning of the procedure; 13 of them were done without the benefit of a proper time-out. The following marking and time-out practices might have prevented specific types of wrong-site extremity procedures: (1) mark the site close to the planned incision and reference it during all steps leading up to the incision, and (2) do separate time-outs for separate procedures on the same patient.
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