Common Knee Injuries

What is the mechanism of injury for a Medial Collateral Ligament Sprain?

• Direct blow from the medial side (varus force)

• Direct blow from the lateral side (valgus force)

• Internal rotation of the tibia

• Hyperextension of the knee

Which is more common, medial collateral ligament sprains or lateral collateral ligament sprains?

• Medial collateral ligament sprains

• Lateral collateral ligament sprains

• They are equally common

• Neither, as collateral ligament sprains are rare

How many grades of MCL sprains are there?

• 2

• 4

• 3

• 5

What are the symptoms of a Grade 1 MCL sprain?

• Moderate swelling, loss of ROM, mild instability

• Moderate swelling, immediate pain, loss of stability

• Severe pain, inability to move, complete instability

• Mild pain over MCL, minor stiffness, stable knee

Which of the following is a symptom of a Grade 2 MCL sprain?

• Mild pain over MCL, minor stiffness, stable knee

• Moderate swelling, immediate pain, loss of stability

• Severe pain, inability to move, complete instability

• Moderate swelling, loss of ROM, mild instability

What characterizes a Grade 3 MCL sprain?

• Mild pain over MCL, minor stiffness, stable knee

• Moderate swelling, loss of ROM, mild instability

• Moderate swelling, immediate pain, loss of stability

• No swelling, no pain, complete stability

What is the mechanism of injury for a Lateral Collateral Ligament Sprain?

• Direct blow from the lateral side (valgus force) and the tibia is externally rotated

• Direct blow from the medial side (varus force) and the tibia is internally rotated

• Hyperextension of the knee joint

• Excessive rotation of the hip joint

What can accompany a Lateral Collateral Ligament Sprain?

• A dislocation of the patella

• A tear of the anterior cruciate ligament

• An avulsion fracture of the femur or tibia

• A rupture of the Achilles tendon

What is a symptom of an LCL injury?

• Numbness in the toes

• Pain and tenderness over LCL

• Clicking sound in the elbow

• Headache

What is another sign of an LCL injury besides pain?

• Swelling over the LCL

• Increased flexibility

• Bruising on the opposite leg

• Loss of consciousness