Polyarthritis Flashcards
articular diseases cause ____ for active ROM and ____ for passive ROM
pain, pain
non- articular diseases cause ____ for active ROM and ____ for passive ROM
pain, no pain
non-MSK related diseases cause ____ for active ROM and ____ for passive ROM
no pain, painful
psychological (?)
features (stiffness, systemic symptoms, joint pattern, etc.) for inflammatory diseases
stiffness: morning, last >30 min
systemic symptoms (B symptoms): present
joint pattern: RA or PsA or other
other: nodules, rashes, other organ involvement
not confined to joints
features (stiffness, systemic symptoms, joint pattern, etc.) for non-inflammatory diseases
stiffness: after inactivity, lasts few min
systemic: no
joint pattern: OA
other: no
what is the number one route of infection for adult septic arthritis?
hematogenous
what is a common route of infection for paediatric septic arthritis
contiguous spread from osteomyelitis
what are some medical conditions that predispose to MSK infections
compromised host defence (hematological & metabolic disorders, immunosuppressive drugs direct penetration of joint joint damage (rheumatic, prosthetic joints)
septic arthritis organism for neonates
staph
strep
coliform bacteria
septic arthritis organism for children
staph
septic arthritis organism for young adults
staph
neisseria gonorrhoeae
septic arthritis organism for adult
staph
septic arthritis organism for immunocompromised patients
gram negatives
investigations for septic arthritis
aspirate, send for:
cell count and differential
crystal analysis
culture and sensitivity, including gram stain
joint aspirate feature for OA
clear
1-10mL (slightly higher than normal)
high viscosity,
200-10,000 WBC/cubic mm (higher than normal)
<50 polymorphonuclear cells (slightly higher than normal)
joint aspirate feature for inflammatory arthritis
opaque (abnormal) 5-50mL (higher than normal) low viscosity (abnormal) 500-75,000 cell count (higher than normal) >50 (higher than normal)
joint aspirate feature for septic arthritis
opaque (abnormal) 5-50mL (higher than normal) low viscosity (abnormal) >50,000 cell count (much higher than normal) >75 (much higher than normal)
higher the white count, higher the % of PMN’s, higher the chance of septic arthritis