38 results
Arthrocentesis - Joint Fluid Analysis

Effusion Characteristics (Color, Clarity, WCC, PMN, Crystals, Bacteria) by Disease Process: 
OA,
Arthrocentesis - Joint ... Fluid Analysis ... birefringent crystals), Gout ... #Diagnosis #Differential ... #Syonvial #Fluid
Rheumatoid arthritis (RA): Pathogenesis and Joint diseases features
 • RA affects 1% of population, women >
pain, swelling, ... pain), especially ... of inflammatory fluid ... exceeds rate of fluid ... effusion (Swelling
Approach to Joint Pain - Arthritis Differential Diagnosis Framework

Inflammatory Versus Noninflammatory Pain
 • Is it inflammatory
Differential Diagnosis ... 2000 in synovial fluid ... Crystal induced (Gout ... fever • Lyme • Gout ... #pain #Differential
Approach to Joint Pain - Diagnostic Framework

1) Chronicity
2) Inflammatory vs Non-Inflammatory
3) Number of Joints Involved

1) Chronicity:
Pain - Diagnostic ... reactive arthritis, gout ... Parallel, yellow = gout ... #Joint #Pain #MSK ... approach #workup #differential
Causes of Knee Effusions - Differential Diagnosis Framework

Knee Effusion Red Flags:
1. Fever/Chills/Joint pain/Night sweats/Weight loss
	- DDX:
		-
- Differential ... Fever/Chills/Joint ... pain/Night sweats ... : - Gout - Pseudo ... gout - Osteoarthritis
Arthrocentesis of synovial fluid - Interpretation
 - Normal
 - Noninflammatory	
 - Inflammatory	
 - Septic

Viscosity of synovial
does not rule out ... 50,000 #Diagnosis #Differential ... Arthrocentesis #Joint ... #Syonvial #Fluid ... #Effusion #Analysis
Osteoarthritis (OA): Clinical findings
 • Stimulation of joint nociceptors in subchondral bone -> Pain with loading
Stimulation of joint ... subchondral bone -> Pain ... nociceptors -> Pain ... fluid production ... -> Joint effusion
Inflammatory Joint Pain - Differential Diagnosis Algorithm 
Monoarticular
 • Gout (Podagra, Tophi)
 • Pseudogout
 • Early
Inflammatory Joint ... Pain - Differential ... Monoarticular • Gout ... ) • Gout • Psoriatic ... JointPain #MSK #Differential
Joint Disorders - Differential Diagnosis Algorithm
Monoarthritis
 • Septic
 • Crystalline
     - Gout
Joint Disorders ... - Differential Diagnosis ... Crystalline - Gout ... “Bamboo Spine” Fusion ... Disorders #msk #Differential
Knee Effusions - Arthrocentesis Interpretation

Inflammatory arthritis:
 • Color: Yellow-> Green
 • Clarity: Opaque
 • Viscosity: Low
Knee Effusions - ... analysis: • MSU: Gout ... blood/synovial fluid ... diagnosis #septic #joint ... #fluid #analysis