33 results
Approach to Joint Pain - Diagnostic Framework

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

1) Chronicity:
WBC <2k: Noninflammatory ... lower limbs) • WBC ... spondyloarthropathies • WBC ... presentation with lower WBC ... #Joint #Pain #MSK
Knee Effusions - Arthrocentesis Interpretation

Inflammatory arthritis:
 • Color: Yellow-> Green
 • Clarity: Opaque
 • Viscosity: Low
Inflammatory arthritis ... Viscosity: Low • WBC ... : Variable • WBC ... Viscosity: High • WBC ... diagnosis #septic #joint
Septic Arthritis: Pathogenesis and clinical findings
Notes:
- Septic Arthritis is typically monoarticular & the knee is involved
Septic Arthritis ... Notes: - Septic Arthritis ... monoarticular & the knee ... - Typical S.A joint ... clarity, >50000 WBC
Septic arthritis of the elbow on Point of Care Ultrasound (POCUS)

66M w painful, swollen R elbow
Septic arthritis ... of Care Ultrasound ... Synovial fluid WBC ... UAB_Sono #Septic #arthritis ... #elbow #Joint #
Acromioclavicular (AC) Joint Septic Arthritis on POCUS

IVDU with severe left shoulder pain.  Can fully range
Septic Arthritis ... WBC/CRP/ESR elevated ... Arthrocentesis-64K WBC ... POCUS #clinical #ultrasound ... #MSK
Arthrocentesis of synovial fluid - Interpretation
 - Normal
 - Noninflammatory	
 - Inflammatory	
 - Septic

Viscosity of synovial
rule out septic arthritis ... with synovial WBC ... Arthrocentesis #Joint ... Septic #Infective #Arthritis
Synovial Fluid Analysis:

Findings (COLOR	TRANSPARENCY	VISCOSITY	WBC COUNT (PER MM3)	PMN CELL COUNT (%)	GRAM STAIN	CULTURE	PCR TEST	CRYSTALS)

By Condition (Normal 
Noninflammatory 
Inflammatory:
TRANSPARENCY VISCOSITY WBC ... Arthrocentesis #Joint ... Septic #Infective #Arthritis
Causes of Knee Effusions - Differential Diagnosis Framework

Knee Effusion Red Flags:
1. Fever/Chills/Joint pain/Night sweats/Weight loss
	- DDX:
		-
Fever/Chills/Joint ... Effusions - Septic Arthritis ... : - Reactive arthritis ... RA/Idiopathic arthritis ... differential #diagnosis #msk
Approach to Joint Pain - Arthritis Differential Diagnosis Framework

Inflammatory Versus Noninflammatory Pain
 • Is it inflammatory
Approach to Joint ... , erythema and WBC ... • How many joints ... effusion with few WBCs ... #Diagnosis #MSK
Rheumatoid Arthritis Summary
Overview: chronic, inflammatory symmetric polyarthritis involving small joints of hands/feet, knees, shoulders
Signs & Symptoms:
Rheumatoid Arthritis ... involving small joints ... of hands/feet, knees ... narrowing) • Ultrasound ... #Rheumatoid #Arthritis