Final answer:
The size of the RetroDrill guide pin varies depending on the surgical technique and the manufacturer, but it typically ranges from 1.5mm to 2.5mm in diameter and must match the corresponding RetroDrill system specifications.
Step-by-step explanation:
The RetroDrill guide pin is a component used in orthopedic surgery, specifically during Anterior Cruciate Ligament (ACL) reconstruction. Its size can vary depending on the specific surgical technique and the manufacturer of the RetroDrill system.
Typically, guide pins in ACL surgeries can range in size from 1.5mm to 2.5mm in diameter, although the exact size of the RetroDrill guide pin would be specified by the surgical equipment manufacturer and should match the specifications required for the corresponding RetroDrill system being used.