US-guided arthrocentesis and injection of the knee are superior to anatomic landmark palpation-guided arthrocentesis, resulting in significantly less procedural pain, improved arthrocentesis success, greater synovial fluid yield, more complete joint decompression, and improved clinical outcomes.
Sonographic needle guidance reduced procedural pain and improved the clinical outcomes and cost-effectiveness of intra-articular injections of the osteoarthritic knee.
Patients have considerably more pain with intraarticular needle introduction and injectable hyaluronate therapy than physicians estimate. The RPD reduces patient pain, reduces procedure time, and improves needle introduction compared with the conventional syringe for hyaluronate injection therapy for the knee.
Smaller syringes (≤ 3 mL) are superior to larger syringes (≥ 5 mL) for successful hydrodissection and high-pressure intralesional injection of dense connective tissue lesions.
The most effective and reliable safety devices for orthopaedic syringe procedures are shielded safety needles, mechanical syringes, manual retractable syringes, and shielded syringes, but not automatic retractable syringes. Even when adopting safety-engineered devices for an orthopaedic clinic, conventional syringes larger than 20 mL and conventional needles longer than 1.5 in (3.8 cm) are necessary.
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