A 69-year-old obese female is brought in by ambulance with severe pain to her right knee and inability to weight bear after stepping into a hole, causing her to fall. She has an obvious effusion of her right knee which is grossly unstable. You suspect a spontaneously reduced knee dislocation. There are no other injuries.

1. What are the most important complications associated with this injury and their expected findings on physical examination? 2 marks

2. Outline steps required to perform and ABI (3 marks) and fill in the table below 2 marks

The ABI is lower than the normal range.

3. State your most important next steps for this patient. 5 marks