Certified Instrument Specialist (CIS) Practice Exam 2026 – The All-in-One Guide to Achieving Certification Success!

The primary purpose of an intramedullary nail is to align and stabilize bone fractures, particularly in long bones such as the femur or tibia. This method involves inserting a metal rod into the medullary canal of the bone, which provides internal support during the healing process. Intramedullary nails effectively allow for functional rehabilitation while maintaining stability and alignment, which is crucial for proper healing and restoring the mechanical integrity of the bone.

Other options, while they may serve important roles in medical procedures, do not focus on fracture stabilization in the same way. For instance, screw holding forceps are mainly used to grip or hold screws during surgical procedures rather than stabilize fractures. A thoracic cart is utilized in various settings, such as transporting patients or equipment, and does not play a role in bone stabilization. The Lieberman Eye Speculum is instrumental in ophthalmic procedures for holding the eyelids apart, making it irrelevant to the management of bone fractures. Therefore, the intramedullary nail stands out as the most appropriate device for aligning and stabilizing bone fractures.