Ch 158: Osteomyelitis

Question 1

In diabetic patients with foot osteomyelitis, the correlation between cultures from bone biopsy and those from wound swabs or even deep soft tissue punctures is ____.

Answer 1

poor

Question 2

When only bone biopsy samples are considered, the leading pathogens are ________ (30–40%), anaerobes (10–20%), and various gram-negative bacilli (30–40%).

Answer 2

S. aureus

Question 3

In many cases, foot osteomyelitis can be diagnosed clinically, without imaging procedures. Most clinicians rely on the “_____-__-____” test, which has a positive predictive value of ~90% in populations with a high pretest probability. Thus, in a patient with diabetes who is hospitalized for a chronic deep foot ulcer, the diagnosis of foot osteomyelitis is highly probable if bone can be directly touched with a metal instrument. In a patient with a lower pretest probability, ___ should be performed because of its high degree of sensitivity (80–100%) and specificity (80–90%).

Answer 3

probe-to-bone

MRI