Intra-Articular Injections for Knee Conditions

Contraindications and Precautions

Routine injections into prosthetic joints should be avoided, and considered only after strict screening for prosthetic infection by orthopedic surgeons, as recommended by the European League Against Rheumatism 1
Patients with uncontrolled diabetes mellitus are at risk of transient hyperglycemia, particularly days 1-3 post-injection, and should be informed about the need to monitor glucose levels closely, according to the American College of Rheumatology 1
Patients with significant coagulopathy or on anticoagulation therapy should be approached with caution, though most guidelines now recommend continuing anticoagulation, as stated by the American Academy of Physical Medicine and Rehabilitation 2
Aseptic technique should always be used when performing intra-articular therapy to minimize the risk of infection, as recommended by the EULAR 1
Patients with significant bleeding disorders or taking antithrombotic medications should be cautioned about the risk of bleeding, unless bleeding risk is high, as recommended by the EULAR 1

The general recommendation is to limit injections to 3-4 per year in the same joint, to minimize the risk of accelerated cartilage volume loss with repeated injections, as recommended by the European League Against Rheumatism 1
Intra-articular corticosteroid injections are recommended for short-term pain relief in patients with symptomatic knee osteoarthritis, particularly during pain flares with effusion, as suggested by the American Academy of Orthopaedic Surgeons, with clinically important and statistically significant pain relief at 1 week after injection 3, 4
Corticosteroid injections should be avoided within 3 months of planned joint replacement surgery to minimize potential adverse effects, as recommended by the American Academy of Orthopaedic Surgeons and Mayo Clinic 4
The VA/DoD Clinical Practice Guideline recommends avoiding corticosteroid injections for 3 months preceding joint replacement surgery to reduce the risk of periprosthetic joint infection, with an odds ratio of 1.21 for corticosteroids 4

NSAIDs (oral or topical) are recommended for pain and inflammation in patients with knee bursitis, with options including naproxen 500mg twice daily for 4-6 weeks, as recommended by the American College of Rheumatology 5, 6
Paracetamol (acetaminophen) is recommended as the first-line oral analgesic for patients with knee effusion, with a strength of evidence level I, and progressing to NSAIDs is recommended if paracetamol is ineffective, especially with effusion present, as advised by the European League Against Rheumatism 7
Topical NSAIDs are a useful alternative for those unable to tolerate oral NSAIDs, with positive effect sizes up to 0.91 compared to placebo, according to the American College of Rheumatology 8
Hyaluronic acid injections may provide longer-lasting relief than corticosteroid injections for persistent effusions related to osteoarthritis, especially in patients with early radiographic stage, as suggested by the American College of Rheumatology 9, 8

Rest, activity modification, ice application, compression bandage, and elevation are recommended conservative measures for prepatellar bursitis, with ice application supported by evidence from the American Family Physician 10
Quadriceps strengthening exercises are strongly recommended by the American College of Sports Medicine to improve knee function and reduce pain in patients with knee effusion 8
Regular mobility exercises are recommended to preserve knee range of motion, as suggested by the European League Against Rheumatism 7
Joint-specific exercises to improve strength and range of motion, as well as general aerobic conditioning, reduce pain and improve function in knee OA, as recommended by the American College of Rheumatology 7
Weight reduction is significantly effective in reducing symptoms in overweight patients with knee effusion, with even modest weight loss improving function and reducing pain, as recommended by the American Heart Association and the American College of Rheumatology 7
Assistive devices, such as walking sticks and knee braces, are recommended to reduce joint stress and improve mobility, as suggested by the American College of Rheumatology 7
Appropriate footwear and shock-absorbing insoles are recommended to reduce joint stress and improve mobility, as advised by the European League Against Rheumatism 7

Ultrasound and X-rays are useful for diagnosing soft tissue injuries and evaluating structural abnormalities or arthritis, including joint space narrowing and structural changes 11, 7, 8
Evaluation of functional limitations using standardized tools (e.g., WOMAC, Lequesne index) is recommended 7, 8
Advanced imaging (MRI) may be considered to better evaluate the bone spur and assess for other intra-articular pathology, as recommended by the American College of Radiology and the American Academy of Orthopaedic Surgeons 12, 13

Persistent effusion despite 4-6 weeks of conservative management requires referral to a specialist, as suggested by the American Academy of Orthopaedic Surgeons 13
Suspicion of infection or inflammatory arthritis requires urgent referral, as recommended by the American College of Rheumatology 7
Referral to an orthopedic specialist may be considered if conservative management fails, as suggested by the American Academy of Orthopaedic Surgeons 13
Patient education about the condition, its management, and expected outcomes is essential, as suggested by the American College of Rheumatology 7

NSAIDs carry risks of gastrointestinal, cardiovascular, and renal adverse effects, particularly with long-term use, as warned by the American College of Rheumatology 7
Patient comorbidities should be considered when selecting pharmacological interventions, as recommended by the American College of Rheumatology 7
Overuse of corticosteroid injections should be avoided, with a limit of 3-4 injections per year, as cautioned by the American College of Rheumatology 8
Be aware of potential interactions with clarithromycin, erythromycin, cyclosporine, and disulfiram when using corticosteroids 14