333 results
Arthrocentesis - Joint Fluid Analysis

Effusion Characteristics (Color, Clarity, WCC, PMN, Crystals, Bacteria) by Disease Process: 
OA,
Clarity, WCC, PMN, Crystals ... positively birefringent crystals ... negatively birefringent crystals ... ), TB arthritis, ... Septic arthritis
Seronegative Inflammatory Arthritis - Differential Diagnosis
 • Seronegative Rheumatoid Arthritis 
 • Infectious Arthritis: Viral, Bacterial,
Seronegative Inflammatory Arthritis ... • Infectious Arthritis ... Inflammatory Myopathy • Crystal ... IBD-Associated Arthritis ... , Reactive Arthritis
CPPD vs Gout

== CPPD == 

Think About CPPD When:
 • Self-limited synovitis after surgery/trauma (> 65
resulting in an acute arthritic ... Acute CPP Crystal ... Arthritis: Monarticular ... inflammatory arthritis ... Inflammatory Arthritis
Pseudogout Summary - Calcium Pyrophosphate Deposition Disease (CPPD)

Pathophysiology:
Pyrophosphate produced by chondrocytes likely precipitates with calcium to
calcium to form CPP crystals ... Acute CPP Crystal ... Chronic CPP Crystal ... pyrophosphate crystal ... predominance • CPP crystals
Differential Diagnosis of Acute Arthritis

Crystal-induced arthritis: Calcium oxalate, gout, cholesterol, pseudogout, hydroxyapatite crystals

Infectious arthritis: Bacteria, fungi,
Diagnosis of Acute Arthritis ... Crystal-induced ... arthritis: Calcium ... hydroxyapatite crystals ... Infectious arthritis
Gouty arthritis of the shoulder joint

50 yo male presented with shoulder pain.

Note double contour sign at
Gouty arthritis ... deposition of crystal ... POCUS #Ultrasound #Crystals
Joint Disorders - Differential Diagnosis Algorithm
Monoarthritis
 • Septic
 • Crystalline
     - Gout
Gout - Uric Acid Crystals ... Pyrophosphate Dihydrate Crystals ... Joints • Reactive arthritis ... • Psoriatic arthritis ... • Rheumatoid Arthritis
Arthrocentesis of synovial fluid - Interpretation
 - Normal
 - Noninflammatory	
 - Inflammatory	
 - Septic

Viscosity of synovial
The presence of crystals ... rule out septic arthritis ... Septic #Infective #Arthritis
Approach to Joint Pain

History:
Is the pain from:
	• Joint
	• Adjacent bursa
	• Tendon
	• Ligament
	• Bone
	• Muscle
	• Referred from
• Inflammatory arthritis ... Noninflammatory arthritis ... with rheumatoid arthritis ... Crystal Deposition ... ochronosis and crystal
Monoarthritis - Differential Diagnosis
Infection (Acute):
 - S. aureus (most common)
 - S. pneumonia
 - Salmonella (in
Coccidioidomycosis Crystal ... Early Rheumatoid arthritis ... IBD, reactive arthritis ... , psoriatic arthritis