Septic arthritis

Question 1

risk factors septic arthritis

Answer 1

RA/OA
artificial joints
immunosuppression (incl steroids, methotrexate, anti-TNF)
diabetes

Question 2

ddx hot swollen knee

Answer 2

spetic arthritis
inflammatory arthritis
crystal arthropathy
(rarer osteoarthritis, haemarthrosis - haemophilia)

Question 3

most common organisms septic arthritis

Answer 3

STAPH A (75%)
strep
neisseria gonorrhoea

Question 4

cause of septic arthritis in children

Answer 4

h influenza (but rare now bc of vaccination programme)

Question 5

what organisms in extremelsy of age and IVDU

Answer 5

gram -ves

e coli, pseudomonas aeruginosa

Question 6

joints

Answer 6

knee > hip > shoulder

Question 7

septic arthriits + pustular rash

Answer 7

gonococcal

Question 8

ix

Answer 8

ASPIRATE!!! gram staining and culture
blood cultures
FBC
CRP

Question 9

rx

Answer 9

medical emergency (prevent joint destruction)!!!!

abx
analgesia
repeated joint aspiration if doesn’t respond to abx

Question 10

which abx

Answer 10

fluclox

+ cefotaxime if immunosuppressed to cover gram negatives or for gonorrhea

Question 11

how long to give abx for

Answer 11

2 weeks IV
4 weeks oral
total 6 weeks