About six months after patella stabilizing surgery postoperative restrictions are commonly lifted and patients may consider whether a return to activity/sports is feasible. Currently, there are no evidence-based criteria to determine a patients readiness for sports and/or activity (RTS) following stabilizing surgery. The purpose of this project was therefore to investigate the feasibility of a test battery to evaluate knee function in postoperative follow-up evaluation - and in RTS decisions - for patients with patellar instability. Banff Patellofemoral Instability Instrument 2.0 and Norwich Patellar Instability Score is being translated and validatend in a Norwegian population. Furter is patients experience of living with patellar instability explored.
Study Type
INTERVENTIONAL
Allocation
NA
Purpose
OTHER
Masking
NONE
Enrollment
120
At baseline, approximately 3 weeks before surgery and 6 months after surgery: patients conduct a testbattery consisting of 2 PROMs: the NPI-No and BPII2.0-No together with three physical tests: isokinetic strength tests, hop tests and Y-balance test. For the cross-cultural validation of NPI and BPII2.0 patients also conduct KOOS, IKDC 2000 and Tampa Scale.
Haraldsplass Deaconess Hospital
Bergen, Norway
Banff Patellofemoral Instability Instrument 2.0 change from pre- to postopertaive score
Self-administered, disease-specific quality of life score. It will be administered as a patient completed questionnaire.
Time frame: Baseline and 6 months after surgery.
Norwich patellar Instability score change from pre- to postopertaive score.
Patient-perceived symptoms of patellar instability during activity. It will be administered as a patient completed questionnaire.
Time frame: Baseline and 6 months after surgery.
Y-balance test
Evaluates knee stability and asymmetrical balance in three directions (anterior, posteromedial and posterolateral).
Time frame: Baseline and 6 months after surgery.
Single legged hop tests
Comprises four tasks: single-leg hop for distance, triple hop for distance, triple cross-over hop for distance and six-meter timed hop.
Time frame: Baseline and 6 months after surgery.
Isokinetic strength test
Strength testing of knee extension / flexion (Biodex system 4 dynamometer, Biodex Medical Systems Inc., Shirley, New York). With a standardized protocol of five repetitions at 60 o/sec and 30 repetitions at 240 o/sec.
Time frame: Baseline and 6 months after surgery.
IKDC-2000
Is a knee-specific, patient reported tool, including 18 questions across three domains: symptoms, physical activity and function. It will be administered as a patient completed questionnaire.
Time frame: Baseline and 6 months after surgery.
KOOS
Is an instrument to assess the patient's opinion about their knee and associated problems. It comprises five domains: pain, other symptoms, function in daily living, function in sports and recreational activities and knee-related QOL. It will be administered as a patient completed questionnaire.
Time frame: Baseline and 6 months after surgery.
Tampa scale of kinesiophobia
TSK is a 17-item patient-reported questionnaire aimed at quantifying the fear of re-injuries due to movement and physical activity. It will be administered as a patient completed questionnaire.
Time frame: Baseline and 6 months after surgery.
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