Effectiveness of Cingal™ for Improving Pain Scores and Function in Anterior Knee Pain

Kinematic data will be collected at baseline and 6 and 12 weeks after administration of the Cingal™ injection. Outcome measures include ankle dorsiflexion at contact, maximum rear foot eversion, knee flexion at contact, knee adduction in late stance, and hip joint angle. In addition, the mean of three angle measurements for each parameter will be recorded.

A crane scale (strain gauge) will assess isometric strength testing of the quadriceps and hamstring muscles.

The Drop Vertical Jump test will be used to assess dynamic valgus collapse of the knee.

The Pain VAS is anchored by 0, which corresponds to "no pain", and 10, which corresponds to the "worst possible pain".

The AKPS is a 13-item knee-specific self-report questionnaire. It documents responses to six activities thought to be explicitly associated with anterior knee pain syndrome (walking, running, jumping, climbing stairs, squatting, and sitting for prolonged periods with knees bent), as well as symptoms such as limp, inability to weight bear through the affected limb, swelling, abnormal patellar movement, muscle atrophy and limitation of knee flexion. In addition, the AKPS asks about the duration of symptoms and the limb(s) affected. The maximum score is 100, and lower scores indicate greater pain/disability.

The KOOS is a knee-specific instrument developed to assess patients' opinions about their knee and associated problems.The KOOS assesses patient pain (9 items), other symptoms (7 items), function in daily living (17 items), function in sport and recreation (5 items), and knee related quality of life (4 items). Scores range from 0 to 100 with a score of 0 indicating the worst possible knee symptoms and 100 indicating no knee symptoms. The KOOS is a patient reported joint-specific score, which may be useful for assessing changes in knee pathology over time, with or without treatment.

The MARX Activity Rating Scale is a four-item activity rating scale where the patient is asked to rate how often they were able to perform each activity (e.g., running, cutting, decelerating, and pivoting) in their most healthy and active state. The four knee functions are rated on a 5-point scale of frequency (from 0 - 5) and scores are added up to a maximum of sixteen points, with a higher score indicating more frequent participation.