Micro - wound bone + joint infections Flashcards
Rheumatoid arthritis patients are at risk of surgical site infections. What steps are taken to prevent SSIs in these patients?
stop DMARDs for 4 weeks pre-op –> 8 weeks post-op
How does hair removal increase risk of SSI?
Razor –> micro abrasions of the skin
Biggest RF for SSI after cardiothoracic surgery
Staph aureus colonisation in nasal mucosa
How does temperature in surgery affect risk of acquiring SSI?
Hypothermia –> vasoconstriction –> less oxygenation –> risk of SSI
Number 1 organism in SSI?
Staph aureus
top 2 organisms in septic arthritis?
Staph aureus
Strep
How does S aureus cause septic arthritis? i.e. how does it do its damage
has fibronectin binding protein + PVL toxin
Number 1 organism in chronic osteomyelitis
S aureus
best imaging for chronic osteomyelitis?
MRI
Vertebral osteomyelitis - which part is most commonly affected?
Lumbar spine
Management of chronic osteomyelitis?
Abx + debridement
Radiology of prosthetic joint infection shows…?
“loosening” of joint
2 causative organisms of prosthetic joint infection?
Staph + enterobacteriaceae
Management of prosthetic joint infection?
Removal of prosthesis + replacement with Abx cement
How to confirm diagnosis of prosthetic joint infection?
5 tissue specimens from around implant for microscopy