What are the three basic elements of rating for knee disability?

The three basic elements of rating for knee disability include limitation of flexion and extension, instability, and thigh atrophy.

Limitation of flexion and extension refers to the range of motion in the knee joint, which is critical in assessing the impact of a knee injury on a person's ability to perform daily activities. When there are restrictions in either flexion or extension, it can significantly affect mobility and functionality.

Instability refers to the knee's ability to maintain its structural integrity during movement. This can manifest as a feeling of the knee giving way or failing to support weight, which is another essential aspect when evaluating a knee disability as it directly impacts a person's balance and safety.

Thigh atrophy is the reduction in muscle mass and strength in the thigh area that can occur as a consequence of disuse or injury to the knee. This aspect emphasizes the importance of muscle support around the joint and how injury can lead to pronounced physical changes that affect overall mobility.

Understanding these three elements is crucial for accurately assessing knee disabilities in the context of workers' compensation claims.