Which radioactive substance used in Cup T?

JIPMER Nursing Officer - 2020

Pharmacology

Hard

Appeared in: JIPMER Nursing Officer - 2020

Explanation

The question contains typos; it should ask for the 'radiopaque' substance in a 'Copper T' IUD.
Barium sulphate is an inert, radiodense chemical compounded into the polyethylene plastic frame of the IUD.
Its purpose is to make the device visible on X-ray imaging, which is essential for confirming correct placement or locating a migrated device.
This property is called radiopacity, not radioactivity. The device does not emit radiation.

Option B: Copper is the active contraceptive ingredient in a Copper T, but it is present as elemental copper wire, not as copper sulphate. Copper sulphate is a different chemical compound.
Option C: Calcium sulphate is commonly known as plaster of Paris. It has no role in the manufacturing of intrauterine devices.
Option D: Magnesium sulphate is a medication used to prevent seizures in eclampsia, treat low magnesium levels, and other medical conditions. It is not a structural component of an IUD.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Composition of Intrauterine Contraceptive Devices (IUDs), specifically the radiopaque agent in Copper T as background academic context rather than a clinical decision trigger.
The radiopacity of an IUD is a critical safety feature. It allows a nurse or doctor to use a simple X-ray to confirm the IUD is correctly positioned in the uterine fundus, especially if the removal strings are not visible in the vagina ('lost IUD').
Knowing the components helps in patient education. A nurse can confidently reassure a patient that the IUD is not radioactive and explain that the material used for visibility is inert and safe.
What if? If an IUD were not radiopaque, locating a device that has perforated the uterus or been expelled unnoticed would be much more difficult. It would require transvaginal ultrasound, which may not always visualize a device outside the uterus, or more invasive procedures like hysteroscopy or laparoscopy, increasing patient risk and healthcare costs.

How to Approach the Question

First, analyze the question stem for keywords and potential errors. Recognize that 'Cup T' is a likely typo for 'Copper T' and 'radioactive' is a medically incorrect term for what is likely 'radiopaque'.
The question asks for a substance 'used in' the device. This could be the active ingredient or a structural component.
Evaluate the options based on your knowledge of medical devices and pharmacology.
Recall that Copper T IUDs have a plastic frame and copper wire. The copper is for contraception.
Consider the term 'radiopaque'. Barium sulphate is a well-known contrast agent used to make structures visible on X-rays.
Eliminate the other options: Calcium sulphate (plaster) and Magnesium sulphate (medication for eclampsia) are not used in IUDs.

Concept Tested & Keywords

Concept Tested: Composition of Intrauterine Contraceptive Devices (IUDs), specifically the radiopaque agent in Copper T.
Stem keywords: Cup T, radioactive substance
Lead-in keywords: Which
Clinical cues: The question contains common typos ('Cup T' for Copper T and 'radioactive' for radiopaque) which must be corrected to understand the query.

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