Knee Arthroplasty
A 68-year-old woman presents 18 months after primary total knee arthroplasty with increasing pain, swelling, and warmth in the operated knee. She had an uneventful postoperative course initially with good early function. She is now febrile (38.2°C) and has an elevated CRP (85 mg/L) and ESR (65 mm/hr). Knee aspiration yields turbid fluid with 45,000 white cells/μL (85% polymorphonuclear cells). Regarding complications of total knee arthroplasty:
Mark each as TRUE or FALSE
Periprosthetic joint infection (PJI) diagnosis uses the MSIS/ICM criteria: major criteria (two posit...
PJI treatment depends on timing and organism: acute infection (less than 4 weeks) with stable implan...
Synovial WBC less than 1000/μL confirms PJI; CRP and ESR are not useful markers; alpha-defensin has ...
Other important TKA complications include: stiffness (arthrofibrosis) - manipulation under anesthesi...
Aseptic loosening is the most common long-term cause of TKA failure; risk factors include malalignme...
Answer the questions to see explanations
Click T (True) or F (False) for each option