Ortho Soft Tissue Infections Flashcards
Tell tale signs of an infection
warmth, erythema, swelling, pain
swelling and erythema DO NOT improve with elevation
What are the 3 laboratory tests you are going to order for an infection
WBC, ESR, CRP
What does a moth eaten or ghost bone signify on xray
osteomyelitis
What is the difference between a T1 and T2 view on MRI
T1: Anatomy view and problem areas (infections) show up darker (more black) compared to surrounding structures
T2: water sensitive that looks for inflamm by bringing fluid into problem area and turns it lighter (whiter) than surrounding areas
What is important to note when ordering a bone scan on a total joint replacement
The bone scan may show up positive up to two years after the replacement
What is the best culture to get
Deep wound culture
What should you look for in a joint aspiration
Cell count (specifically a left shift with infection), gram stain, cultures, crystals
What are examples of soft tissue infections
Cellulitis, bite injuries, necrotizing fasciitis, MRSA, surgical wound infection
Features of cellulitis
Superficial/subq tissue well demarcated erythema tender and warm over infected area Does not improve with elevation May present with lymphangitis
What is the most common bacterial cause of cellulitis
Group A strep
What should you always order if you’re concerned about an infection
xray
What is important about human bites
early abx tx is critical
watch for worsening infection
open fractures, get an xray!
What are clinical signs of necrotizing fasciitis
pain out of proportion on exam
crepitus, blistering, dishwater pus, sepsis
surgical emergency
who’s at risk for MRSA
athletes, IV drug users, homeless, military, prisoners
How high is the risk for infection from surgical wounds
relatively low (<10% superficial)
