Osteomyelitis Flashcards Preview

Hugh's Locomotor > Osteomyelitis > Flashcards

Flashcards in Osteomyelitis Deck (16):
1

What is the limitation of using blood culture as a means of diagnosis?

Bacteria are only present in the blood in 30% of the presenting cases

2

Which part of the bone do bacteria typically infect?

In looped capillaries around the metaphysis

3

What is septic arthritis?

Infection of a joint, usually via haematogenous spread

3

Which bacteria is common agent of infection after in very young children?

Grp B Strep

Hib

Other gram negatives

4

How does osteomyelitis differ in children compared to adults?

In children the infection is able to cross the growth plate while in adults it isn't

5

What are some common presenting symptoms of osteomyelitis?

Pain

Pseudoparalysis

Fever 

Malaise

Limp in children

5

What is the standard treatment for osteomyelitis?

Flucloxacilin (best vs staph) for 3-5 days IV then 3 weeks oral if uncomplicated

Cefotaxime added in neonates to cover gram negs

7

Where is osteomyelitis causing Staph typically acquired?

It is a communsal carried on the body

8

Which bacteria is common agent of osteomyelitis after chicken pox?

Strep. pyogenes

9

Which bones are more commonly infected?

Long bones particularly:

Femur

Humerus

Tibia

10

What are the best imaging techniques for osteomyelitis?

MRI

Bone scan

12

How can osteomyelitis be identified on X-ray?

Bulging of the periosteum

13

What is the most common means by which bacteria get to a joint to infect it?

Haematogenous spread

14

What are some differential diagnoses for osteomyelitis?

Septic arthritis

Bone metastases

Cellulitis

15

What is the limitation of X-ray as a means of diagnosing osteomyelitis?

Most of the time it's difficult to detect anything until peristeal lifting is present

16

What are the top three highest causes of osteomyelitis?

Staphlococcus aureas

Streptococcus pyogenes

Kingella kingae