3 - Acute septic arthritis

Question 1

3 routes of infection?

Answer 1

haematogenous, eruption of bone abscess, direct invasion

Question 2

4 common causative organisms?

Answer 2

staph aureus, haemophilus influenzae, strep pyogenes, E. coli

Question 3

what happens to cause acute septic arthritis?

Answer 3

complete destruction of articular cartilage

Question 4

3 possible outcomes for patients?

Answer 4

total recovery, partial loss of articular cartilage and OA, fibrous/ bony ankylosis

Question 5

3 signs of ASA in neonate?

Answer 5

irritability, resistant to movement, ill

Question 6

5 signs of ASA in child/ adult?

Answer 6

acute pain in single large joint, reluctant to move joint, increased temp, increased pulse, increased tenderness

Question 7

what joints are usually involved in adults with ASA?

Answer 7

superficial joint - knee, ankle, wrist

Question 8

5 microbiology investigations in adults with ASA?

Answer 8

FBC, WBC, ESR, CRP, blood cultures

Question 9

3 other investigations for ASA?

Answer 9

X-ray, US, aspiration

Question 10

most common cause of ASA in adult?

Answer 10

infected joint replacement

Question 11

5 differentials?

Answer 11

acute OM, trauma, irritable joint, gout, haemophilia

Question 12

3 aspects of treatment for ASA?

Answer 12

general supportive measures, antibiotics, surgical drainage and lavage