Final answer:
The elbow and forearm are prepped for an ORIF of the olecranon process, which is part of the ulna bone that forms the bony tip of the elbow.
Step-by-step explanation:
The parts of the body that are prepped for an ORIF (Open Reduction and Internal Fixation) of the olecranon process are the elbow and forearm. The olecranon process forms the bony tip of the elbow and is part of the ulna, which is the medial bone of the forearm. The elbow joint includes articulations between the humerus and the ulna, as well as between the humerus and the radius. Considering that the olecranon process is located at the proximal end of the ulna, any surgical procedure involving its repair will primarily focus on the elbow area where the ulna and humerus articulate and may extend into the forearm to secure the fixation.