Which of the following components is NOT typically found in a compression paddle design?

In a compression paddle design, the vertical support arm is typically a crucial component for providing stability and alignment during the mammography procedure. Its primary role is to hold the paddle in place while allowing for effective compression of the breast tissue. However, it is not considered a part of the paddle itself; rather, it is part of the overall system that supports the paddle's function.

On the other hand, the lip of the paddle, the locking mechanism, and the height adjustment feature are integral components of the paddle design. The lip of the paddle helps ensure proper positioning and containment of the breast tissue, the locking mechanism secures the paddle in place during the imaging process, and the height adjustment feature allows for customization based on the patient's anatomy, enhancing comfort and accuracy in imaging. Thus, while important for the overall system, a vertical support arm is not a characteristic feature of the compression paddle design per se.