Investigation preferred to Confirm intrauterine device in place with missing strings of IUD?
**Core Concept**
The preferred investigation to confirm the presence of an intrauterine device (IUD) in place, especially when the strings are missing, is a crucial aspect of reproductive healthcare. This involves using a diagnostic tool to visualize the IUD within the uterus, ensuring its correct placement and reducing the risk of complications.
**Why the Correct Answer is Right**
The correct answer involves the use of a hysterosalpingogram (HSG) or a sonohysterogram (SHG) to confirm the presence of the IUD. These imaging techniques involve injecting a contrast agent into the uterus, allowing for visualization of the IUD within the uterine cavity. This is particularly useful when the strings of the IUD are missing, making it difficult to confirm its presence through physical examination or ultrasound alone. The contrast agent helps to outline the IUD, ensuring its correct placement and reducing the risk of complications such as perforation or migration.
**Why Each Wrong Option is Incorrect**
* **Option A:** Ultrasound is not sufficient to confirm the presence of an IUD when the strings are missing, as it may not provide a clear visualization of the device within the uterine cavity.
* **Option B:** A hysteroscopy may be used to visualize the IUD, but it is not the preferred investigation when the strings are missing, as it requires more invasive procedures and may not be readily available.
* **Option D:** A plain X-ray is not suitable for confirming the presence of an IUD, as it may not provide clear visualization of the device within the soft tissues of the uterus.
**Clinical Pearl / High-Yield Fact**
When a patient reports missing IUD strings, it is essential to perform a hysterosalpingogram (HSG) or sonohysterogram (SHG) to confirm the presence and correct placement of the IUD, reducing the risk of complications and ensuring optimal reproductive healthcare.
**Correct Answer:** C.