CPT® Code 27445

The CPT® Code 27445 refers to the surgical procedure known as knee arthroplasty using a hinge prosthesis, specifically the Walldius type. This procedure is categorized under arthroplasty, which is a surgical intervention aimed at restoring the function of a joint. In the context of knee arthroplasty, there are two primary types of prostheses utilized: hinged and unlinked. The hinged prosthesis, as indicated by this code, is designed to provide stability and support to the knee joint, particularly in cases where there is significant damage or loss of bone structure. The Walldius hinged prosthesis is recognized as a first-generation device, which has largely been supplanted by more advanced models, such as the third-generation S-ROM rotating hinged total knee prosthesis. Hinged prostheses are typically indicated for patients suffering from degenerative joint disease or bone tumors that result in considerable bone loss. They are also employed in situations where complications arise from previously placed unlinked prostheses, such as infections or mechanical failures. The surgical approach involves making an anterior incision over the knee joint, allowing for direct access to the joint capsule. During the procedure, the knee joint is thoroughly inspected, and any bone spurs or soft tissue that may impede function are excised. The procedure is meticulously designed to ensure proper alignment and functionality of the knee joint post-surgery, making it a critical intervention for patients with severe knee joint issues.