Which of the following IUDs contain ferrous material?

Intrauterine devices (IUDs) are contraceptive devices that can be made from various materials, but not all of them contain ferrous material. To determine which option is correct, it's important to recognize the materials used in the construction of these devices.

The Copper T and Copper 7 IUDs are made from plastic and are coated with copper, which does not have ferrous properties. The copper used is not ferrous as it does not contain significant amounts of iron. On the other hand, the Mirena IUD is a hormonal device primarily made of a type of plastic (silicone) and does not contain ferrous materials either.

Since none of these IUDs incorporate ferrous material in their design, the correct selection affirms that none of the choices listed contain ferrous material. This is essential information, especially in the context of magnetic resonance environments, where the presence of ferrous materials can pose safety risks due to the influence of magnetic fields. Understanding the composition of devices like IUDs is crucial in ensuring patient safety during MR imaging procedures.