Micro - wound bone + joint infections Flashcards

1
Q

Rheumatoid arthritis patients are at risk of surgical site infections. What steps are taken to prevent SSIs in these patients?

A

stop DMARDs for 4 weeks pre-op –> 8 weeks post-op

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2
Q

How does hair removal increase risk of SSI?

A

Razor –> micro abrasions of the skin

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3
Q

Biggest RF for SSI after cardiothoracic surgery

A

Staph aureus colonisation in nasal mucosa

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4
Q

How does temperature in surgery affect risk of acquiring SSI?

A

Hypothermia –> vasoconstriction –> less oxygenation –> risk of SSI

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5
Q

Number 1 organism in SSI?

A

Staph aureus

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6
Q

top 2 organisms in septic arthritis?

A

Staph aureus

Strep

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7
Q

How does S aureus cause septic arthritis? i.e. how does it do its damage

A

has fibronectin binding protein + PVL toxin

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8
Q

Number 1 organism in chronic osteomyelitis

A

S aureus

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9
Q

best imaging for chronic osteomyelitis?

A

MRI

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10
Q

Vertebral osteomyelitis - which part is most commonly affected?

A

Lumbar spine

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11
Q

Management of chronic osteomyelitis?

A

Abx + debridement

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12
Q

Radiology of prosthetic joint infection shows…?

A

“loosening” of joint

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13
Q

2 causative organisms of prosthetic joint infection?

A

Staph + enterobacteriaceae

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14
Q

Management of prosthetic joint infection?

A

Removal of prosthesis + replacement with Abx cement

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15
Q

How to confirm diagnosis of prosthetic joint infection?

A

5 tissue specimens from around implant for microscopy

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