Patient comes with crush injury to upper limb, doctor is concerned about gangrene and sepsis what can help decide between amputation and limb salvage?

Orthopaedics

Patient comes with crush injury to upper limb, doctor is concerned about gangrene and sepsis what can help decide between amputation and limb salvage?

What is the use of the given instrument:

Which fracture results in the given deformity?

Positive pivot shift test in knee is because of injury to -