Final answer:
Sternal wires are used to close the sternum after open-heart surgery, and a sternal wire twister is a device specifically designed for this purpose. Shadow X-ray images can show the correct placement of sternal wires along with other implants.
Step-by-step explanation:
The context of the question pertains to the use of sternal wires in surgical procedures, particularly those involving the chest. When a sternotomy is performed, typically in open-heart surgery, the sternum is split. After the operation, it's crucial to reapproximate the edges of the sternum to facilitate healing. This is done using special wires that are carefully twisted together to hold the bony edges close to each other. Over time, these wires promote the healing of the sternum by ensuring stability and minimizing movement. The twisting part is typically done with a device known as a sternal wire twister, which is designed for this specific purpose. Furthermore, images such as shadow X-ray images can show the placement of these wires postoperatively, along with other surgical implants like artificial heart valves and pacemakers.