10 results
Osteoarthritis (OA): X-ray features 
 - Joint space narrowing (least specific)
 - Subchondral Cysts (pockets of
Osteoarthritis (OA ... Osteoarthritis #OA
Osteoarthritis (OA): Clinical findings
 • Stimulation of joint nociceptors in subchondral bone -> Pain with loading
Osteoarthritis (OA ... Osteoarthritis #OA
Arthrocentesis - Joint Fluid Analysis

Effusion Characteristics (Color, Clarity, WCC, PMN, Crystals, Bacteria) by Disease Process: 
OA,
Disease Process: OA
Approach to Joint Pain - Diagnostic Framework

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

1) Chronicity:
spondyloarthropathies, lupus, OA ... or pseudogout, OA ... • Non-bloody: OA ... gonorrhea, Lyme, OA
Monoarthritis - Differential Diagnosis
Infection (Acute):
 - S. aureus (most common)
 - S. pneumonia
 - Salmonella (in
Sarcoid - Erosive OA
ED Opioid Stewardship Algorithm

Opioid Naive vs Opioid Tolerant

1. Patient Specific, Pain Syndrome-Targeted Approach
2. Combinations of Non-Pharmacologic
Opioid Analgesia (OA
Joint Disorders - Differential Diagnosis Algorithm
Monoarthritis
 • Septic
 • Crystalline
     - Gout
Osteoarthritis (OA
Arthritis of the Hand - Arthritis Patterns

Osteoarthritis:
• Osteoarthritis of the hand usually involves the DIP and
DIP + 1st CMC = OA
CPPD vs Gout

== CPPD == 

Think About CPPD When:
 • Self-limited synovitis after surgery/trauma (> 65
Osteoarthritis with CPPD: OA
Pseudogout Summary - Calcium Pyrophosphate Deposition Disease (CPPD)

Pathophysiology:
Pyrophosphate produced by chondrocytes likely precipitates with calcium to
Osteoarthritis With CPPD OA