Osteomyelitis Flashcards

1
Q

Define osteomyelitis

A

Infection of the bone leading to inflammation, necrosis & new bone formation

Can be:
Acute
Subacute
Chronic

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2
Q

Aetiology of osteomyelitis

general + 2 organisms

A

Bacterial infection from indirect inoculation from skin (e.g. trauma, operative, chronic skin ulcers, haematogenous spread)

Causative organisms
Staphylococcus aureus
Group A streptococcus

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3
Q

Risk factors for osteomyelitis

5

A
Diabetes 
Immunosuppression
IV drug use
Prostheses
Sickle cell anaemia
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4
Q

Epidemiology of osteomyelitis

age x2

A

Mostly in YOUNG CHILDREN

< 20% cases are in adults

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5
Q

Presenting symptoms of osteomyelitis

5

A
Pain in affected area
Fever
Malaise
Rigors
History of preceding skin lesion, sore throat, trauma or operation
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6
Q

Signs of osteomyelitis on physical examination

6

A

Localised erythema
Tenderness
Swelling
Warmth
Painful/limited movement of affected limb
Seropurulent discharge from associated wound or ulcer

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7
Q

Investigations for osteomyelitis

4 types

A

Bloods

Swabs of wound or discharge

Radiographs

Radioisotope bone scan

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8
Q

Investigations for osteomyelitis - bloods

4

A

FBC
Blood culture
ESR
CRP

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9
Q

Investigations for osteomyelitis - radioisotope bone scan

A

Shows area of increased activity

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