13 results
Causes of Knee Effusions - Differential Diagnosis Framework

Knee Effusion Red Flags:
1. Fever/Chills/Joint pain/Night sweats/Weight loss
	- DDX:
		-
- Differential ... Knee Effusion ... Fever/Chills/Joint ... Intra-articulation fracture - Patellar ... diagnosis #msk #
Arthrocentesis - Joint Fluid Analysis

Effusion Characteristics (Color, Clarity, WCC, PMN, Crystals, Bacteria) by Disease Process: 
OA,
Arthrocentesis - Joint ... Fluid Analysis ... Effusion Characteristics ... #Diagnosis #Differential ... #Analysis #Table
Evaluation of Suprapatellar Knee Effusion (normal knee) on Point of Care Ultrasound (POCUS)

POCUS for knee effusions:
knee) on Point ... ) POCUS for knee ... joint, so scan ... proximal to the patella ... #MSK #POCUS #Clinical
Bone Deformity / Limp - Differential Diagnosis Algorithm 
Infection
 • Septic Arthritis
 • Cortical Hypertrophy
 •
Diagnosis Algorithm ... • Rickets Hip Joint ... Legg-Calve-Perthes Disease Knee ... Deformity #Limp #MSK ... #Differential #
Joint Disorders - Differential Diagnosis Algorithm
Monoarthritis
 • Septic
 • Crystalline
     - Gout
- Differential Diagnosis ... “Bamboo Spine” Fusion ... #Disorders #msk ... #Differential # ... Diagnosis #Algorithm
Knee Effusions - Arthrocentesis Interpretation

Inflammatory arthritis:
 • Color: Yellow-> Green
 • Clarity: Opaque
 • Viscosity: Low
Knee Effusions - ... Inflammatory arthritis ... : • MSU: Gout ... Interpretation #diagnosis ... #septic #joint
Arthrocentesis of synovial fluid - Interpretation
 - Normal
 - Noninflammatory	
 - Inflammatory	
 - Septic

Viscosity of synovial
; however, the diagnosis ... #Differential # ... Arthrocentesis #Joint ... Syonvial #Fluid #Effusion ... #Analysis #Table
Suprapatellar Knee Hemarthrosis on POCUS
Note the supra-patella plica separating the physiological knee fluid from the blood
Hemarthrosis on POCUS ... Note the supra-patella ... joint proper. ... stock standard effusion ... clinical #ultrasound #msk
Disseminated Gonococcal Infection - Diagnosis and Management Summary

Bacteremic spread of the Gram-negative diplococci Neisseria gonorrhoeae. History
Synovial fluid analysis ... an accessible joint ... effusion • Laboratory ... Painless) Purulent Arthritis ... , knees, wrists,
Approach to Joint Pain - Arthritis Differential Diagnosis Framework

Inflammatory Versus Noninflammatory Pain
 • Is it inflammatory
Differential Diagnosis ... suggested by warmth, effusion ... the morning • Effusion ... Joint #pain #Differential ... #Diagnosis #MSK