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Rheumatology - Case 48 (3rd ed)
Rheumatology - Case 48 (3rd ed)
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Pdf Summary
The document consists of two study questions related to orthopedic clinical scenarios. <strong>Study Question #1</strong> addresses the synovial joint fluid analysis in pseudogout. The correct answer is <strong>D. Rhomboid-shaped crystals</strong>. In pseudogout, the synovial fluid analysis will typically show calcium pyrophosphate dihydrate crystals, which are rhomboid-shaped. This is distinct from gout, which shows monosodium urate crystals that are needle-shaped. A WBC count of 50,000 and a positive gram stain are indicative of septic arthritis rather than pseudogout. <strong>Study Question #2</strong> concerns the application of corticosteroid injections for a patient with knee osteoarthritis. The correct answer is <strong>C. Supra-patellar fat pad and pre-femoral fat pad</strong>. In the lateral supra-patellar approach for intra-articular knee injections, the joint space is located between these two fat pads. This method is noted to have a 91% accuracy rate. Other approaches, such as the lateral mid-patellar, anteromedial, and anterolateral approaches, have lower accuracy rates. Hoffa’s fat pad and Kager’s fat pad are located in different areas, not relevant for this injection technique. Each question is supported by references from medical literature, including synovial fluid analysis guidelines and studies on needle placement accuracy for knee injections. These questions highlight critical diagnostic and procedural knowledge relevant to joint conditions such as pseudogout and knee osteoarthritis.
Meta Tag
Edition
3rd Edition
Related Case
3rd Edition, CASE 48
Topic
Rheumatology
Keywords
pseudogout
synovial fluid
rhomboid-shaped crystals
calcium pyrophosphate dihydrate
corticosteroid injections
knee osteoarthritis
supra-patellar fat pad
pre-femoral fat pad
joint conditions
orthopedic clinical scenarios
3rd Edition
3rd Edition, CASE 48
Rheumatology
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