Septic Arthtitis

Question 1

Complciations of septic arthritis

Answer 1

Sepsis
Avascular necrosis
Septic dislocation
Chondrolysis
Shortening of limb
Late degnerative change

Question 2

Criteria for non weight bearing joint

Answer 2

Cockes
Fever >38.5
Non weight bearing
Increased ESR and CRP

Question 3

Risk factors

Answer 3

Rheumatoid arthritis and SLE
Joint replacement
Invasive joint procedures (e.g. steroid injections, arthroscopy)
IV drug use
Diabetes mellitus
Immunosuppression
Chronic skin infections

Question 4

Investigations septic arthritis

Answer 4

Joint aspiration - culture, cytology
Blood culture, CRP, ESR

Question 5

mANAGEMENT septic arthritis

Answer 5

Prosthetic -> urgent osteo referral
Native -> IV antibiotics 2 weeks
Fluclox 2g before culture
Ceftriaxone if sus gonorrhea
Then PO if improving after 2 weeks

Question 6

Findings synovial fluid septic

Answer 6

Yellow, gree, turbid
WCC>100, 000, neutrophil predominance