Bone and joint infection Flashcards
what are the most common type of bacteria to infect joint replacemtns
Gram positive
How is joint replacement surgery preformed to avoid infection
- laminar flow
- flucloxaclinin+ gentimycin
- double gloving
- antibiotic infuced cement
Hoe would an bone/joint prosthetic infection be diagnosed
- History
- Xray - bone reaction around implant + excessive new bone formation
*** FBC , raised ESR, raised CRP - culturing**
- aspiration
what are the aims of treatment for prosthetic infetion
- treat pain
- treat sepsis
- restore function
what are the treatment options for prosthetic infectin
- Antibiotic suppression
- debridlement and impant retention
- Excision arthroplasty
- Exchange arthriplasty
- 2 stage exchange
what is debridlement of soft tissue
Removal of death tissues
what is the most common pathogen causing osteromyelitis
Staph aerueus
what type of bone is osteomyelitis more likely to seed in adults
vertebrae
what type of bone is osteomyelitis more likely to seed in children
long bones
what different conditions cause a person to be more susceptible to ostomyelitis
Previous trauma ot bone
immunofificiency
Haemoglobinopathies
RH arthritis
why in children does osteomyelisitic more commonly affect long bones
- In metaphysics
- blood flow is slower
- Endotherlial BM are absent
- capillaries lack or have inactive phagocytic lining cells
- high blood flow in devellpong bones of children
why in adults does osteomyelisitic more commonly affect vertebrae
Which bones does osteomyelitis affect in intravenous drug users
Pelvis and clavical
what are the most common pathogens causing ostomyelitits
- Staph aur
- Coag neg staph
- aerobic gram neg bacilli
- TB
- Salmonella in sickle cell patients
- Pseudomonas aer and serratia in IV drug users
what are the diagnostic tests for osteomyelistis
inflam markers
MRI + Xray
bone biopsy - culture
