Capsule: Ortho Flashcards
Most common sources of bone mets
Breast Prostate Lung Kidneys MM Lymphoma
Most common sites of bone mets
Spine Ribs Pelvis Proximal Femur Proximal Humerus
When does periprosthetic lucency occur?
Prosthetic loosening or infection
What is the imaging modality of choice in diagnosing a joint prosthesis infection?
X-rays
What xray changes are indicative of joint prosthesis infection?
Wideband of radiolucency at the cement/metal bone interface & bone destruction
What are the most causative organisms of infected hip replacement?
Staph aureus & coagulase negative strept
Mx options for periprosthetic infection
Excisional arthroplasty, debridement and implant retention, single/two stage revision
What is arthroplasty?
The surgical creation or reshaping of a new joint to relieve pain and/or restore movement
Where is excision arthroplasty commonly performed?
The hip (Girdlestone), first carpometacarpal joint/trapezium & to correct severe hallux valgus deformity (Keller)
Draw out the carpus
https://teachmesurgery.com/wp-content/uploads/2018/10/21.jpg
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What is the Trendelenburg’s sign?
The pelvis drops on the side of the lifted foot during the step
Draw out the tarsus
https://teachmeanatomy.info/wp-content/uploads/The-Tarsal-Bones-of-the-Foot.jpg
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When is the Trendelenburg’s sign positive?
Contralateral aBductor weakness, superior gluteal nerve palsy, subluxation or dislocation of the hip, shortening of the femoral neck, any painful hip disorder
What are the primary aBductors of the hip?
Gluteus medius & minimus
Intracapsular hip fractures
Femoral head & neck
