Using Ultrasonography to Predict Clinical Response to Intraarticular Corticosteroids in Knee Osteoarthritis

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

120 participants

Study Classification

INTERVENTIONAL

Study Start Date

2005-12-31

Study Completion Date

2009-06-30

Brief Summary

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The primary purposes of this study are the following:

1. To evaluate whether the presence of inflammatory knee osteoarthritis as determined by ultrasonography can be used as a clinical predictor of patient response to intra-articular corticosteroids.
2. To prospectively evaluate clinical responsiveness of intraarticular corticosteroids with the inflammatory phenotype of knee OA using a randomized, placebo controlled clinical design.
3. To evaluate whether lower extremity strength is improved with intraarticular corticosteroid injection.

The investigators hypothesize that patients with signs of inflammation by ultrasonography such as synovitis and effusion will respond better to intraarticular corticosteroid injection.

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Detailed Description

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Osteoarthritis (OA) has previously been thought to be a non-inflammatory condition whose pathologic hallmark is destruction of hyaline cartilage. It is now realized that OA results from a complex interplay of multiple factors, including local inflammatory processes. Evidence suggests that synovitis which is the usual presenting sign of inflammatory arthritis is also frequently present in OA.

The presence of inflammation in knee OA may explain why intra-articular (IA) corticosteroid injections have been shown to result in clinically and statistically significant reduction in osteoarthritic knee pain. Randomized controlled trials have shown that treated patients were less likely to have continuing pain and had significantly lower scores on a visual analogue scale (VAS) for pain. However, studies have failed to determine clinical predictors of response to IA steroid injection, including traditional indices of inflammation (heat, fluid, stiffness). One possibility is that local corticosteroids do no act to relieve pain by reducing synovitis. These putative mechanisms have yet to be elucidated. Perhaps a more plausible explanation is that current methods of assessing local inflammation in OA are inadequate.

Recent studies involving ultrasonography (US) demonstrate that US is a valid and reproducible tool for the detection of synovitis in the knee. It has been shown to be more sensitive than clinical examination and is relatively inexpensive and noninvasive.

Conditions

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Knee Osteoarthritis

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

TREATMENT

Blinding Strategy

DOUBLE

Interventions

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Intraarticular steroids

Intervention Type PROCEDURE

Eligibility Criteria

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Inclusion Criteria

* Both male and female patients are eligible for the study if they are between 40 and 80 years old, have symptomatic knee OA requiring treatment, and have not responded adequately to treatment with acetominophen or NSAIDs.

Exclusion Criteria

* Severe OA as defined by radiographic Kellgren and Lawrence Grade IV
* The patient being wheel-chair bound
* Previous knee operation on the affected side within the past year or history of total knee arthroplasty (affected side)
* Any IA steroid or injections in the last 3 months or viscosupplementation in the last 6 months
* Local sepsis
* Local skin conditions
* Serious concomitant medical illness.

Minimum Eligible Age

40 Years

Maximum Eligible Age

80 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes