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Question 1

Which investigation should you perform if have monoarthritis? [1]

Answer 1

Try to aspirate the fluid

Question 2

Learn the different synovial fluids

Question 3

Describe the difference in colour, WCC number and xtals/bacteria for:

OA
Trauma
SLE
RA
Gout
CPPD
Septic arthritis
TB arthitis

Answer 3

NB look for gram stain and crystals

Question 4

Other investigations for monoarth?

Question 5

Gonoccal arthritis

Answer 5

Localises in the joint and causes true infective arthritis

https://app.pulsenotes.com/surgery/orthopaedics/notes/septic-arthritis

Question 6

What are risk factors for infectious arthritis? [6]

Answer 6

Steroid tx
IC
Diabetes
IV drug use
Infection elsewhere
Damaged, replaced joint

Question 7

How does infectious arthritis usually present? [3]

Answer 7

Local, intense pain and loss of movement
Large joints more common
Less marked signs in IC ptx

Question 8

Which is the most common organsim for septic arthritis; and in young children; IV drug users; viral [3]

Answer 8

Most common:
- Staph. aureus

Young kids:
- Haemophilus influenza

IV drug users:
- Pseuodomonas

Viral:
- Hep B; parvovirus; infectious mononucleosus

Question 9

Tx