04 Ottawa Knee Rule Flashcards Preview

7212 Pathophysiology > 04 Ottawa Knee Rule > Flashcards

Flashcards in 04 Ottawa Knee Rule Deck (12):
1

Why was the Ottawa Knee Rule developed?

- most patients with acute knee injuries seen in ERs undergo radiography of the knee
- a fx occurs only 7% of the time

2

How accurate is a negative result on the Ottawa Knee Rule test?

accurately excluded knee fractures after an acute injury with 99% accuracy

3

What do most knee injuries result from?

- direct blow
- fall
- twisting injury

4

What are blunt injuries?

blows and falls

5

Blunt injuries account for what percentage of all knee injuries?

25%

6

Blunt injuries are responsible for what percentage of all knee fractures?

80%

7

Finding a fracture: blunt injury vs. twisting injury

You are 4x more likely to find a fx after a blunt injury than a twisting one

8

What is an indicator of a fracture?

injury mechanism

9

What are the Ottawa Knee Rules (overall)?

series of 5 yes or no questions that determine whether the patient needs a radiograph

10

What are the 5 Ottawa Knee Rules?

1. aged 55 or older
2. isolated tenderness of the patella
3. tenderness at the head of the fibula
4. inability to flex knee past 90˚
5. inability to bear weight both immediately and in the ER for 4 steps

11

If there's a fracture, will there be tenderness anywhere else?

no bone tenderness of the knee other than the patella

12

What does the knee rule mean by 4 steps?

- unable to transfer weight twice onto each LE
- regardless of limping