Respiratory muscle injury

Because the rating levels are defined in § 4.56, the evidence that matters most is whatever shows the degree of muscle damage and functional loss. Medical records documenting the extent of the injury to the thoracic muscles — such as notes from physical examinations, imaging, or surgical records — help establish severity. Findings from a VA or private examination that describe muscle weakness, loss of power, or limited respiratory function tie directly to the criteria. Records showing whether the injury is entrance and exit wounds, the amount of muscle tissue lost or destroyed, and any signs of fibrosis or impaired movement of the chest wall are relevant. Statements from you or people who know you that describe how the injury limits your ability to breathe during physical activity or daily tasks can also reflect the functional impact the rating criteria are designed to capture.