Residual Pain After Successful Implant of Metaphyseal Sleeves in Total Knee Arthroplasty

Evaluation of Numerical Rating Scale (NRS)

A numerical rating scale (NRS) requires the patient to rate their pain on a defined scale. 0-10 where 0 is no pain and 10 is the worst pain imaginable

Time frame: 7 years

Evaluation of Western Ontario and Mc Master University (WOMAC)

The WOMAC is widely used in the evaluation of Hip and Knee Osteoarthritis. It is a self-administered questionnaire consisting of 24 items divided into 3 subscales: Pain (5 items): during walking, using stairs, in bed, sitting or lying, and standing upright Stiffness (2 items): after first waking and later in the day Physical Function (17 items): using stairs, rising from sitting, standing, bending, walking, getting in / out of a car, shopping, putting on / taking off socks, rising from bed, lying in bed, getting in / out of bath, sitting, getting on / off toilet, heavy domestic duties, light domestic duties The test questions are scored on a scale of 0-4, which correspond to: None (0), Mild (1), Moderate (2), Severe (3), and Extreme (4). A sum of the scores for all three subscales gives a total WOMAC score

Time frame: 7 years

Evaluation of Oxford Knee Score (OKS)

The Oxford Knee Score (OKS) is a 12-item patient-reported PRO specifically designed and developed to assess function and pain after total knee replacement (TKR) surgery (arthroplasty). It is short, reproducible, valid and sensitive to clinically important changes. Each of the 12 answers are assigned the previously defined number of points. They range from 1 = least difficult to 5 = most difficult. The 12 ratings are then added together to give a total score used to assess the patient. The possible total score ranges from 12 to 60 points. Here, a low score (e.g. 12 points) indicates good outcomes and vice versa.