Patient/caregiver was instructed upon anatomy of knee joint as follows:

• The knee joint is where the thigh bone (femur) and the leg bone (tibia) meet.
• A third bone, patella or kneecap, is located in front on the joint between femur and tibia.
• The knee joint is enclosed in or surrounded by a joint capsule, which is known as a synovium. This joint capsule is a watertight sac surrounding the knee joint, formed by the strong ligaments of the knee joint.
• The synovium has fluid called synovial fluid, which lubricates the joint and helps with the smooth rolling of bones in the joint on one another during movement.
• The ends of femur and tibia forming the knee joint are covered by articular cartilage and has a soft, smooth, and rubbery consistency. The smooth and soft articular cartilage at the ends of these bones helps with easy sliding of the bones against each other. Also, the articular cartilage helps as a shock absorber and helps to prevent any damage to the bones due to friction from chronic use.
• In the lower limb, arteries & veins providing blood supply & venous drainage and nerves providing nerve supply to the lower leg travel in close relation to the knee joint. These structures can be at risk for injury, secondary to injury to the knee joint, thus compromising the blood and nerve supply to the lower leg.