## Core Concept
Hyskon, also known as dextran 70, is a high-molecular-weight dextran solution used as a distending medium in hysteroscopy. It is a plasma volume expander that can also serve as a medium to visualize the uterine cavity during hysteroscopic procedures.

## Why the Correct Answer is Right
The correct answer, , implies that one of the listed options is not a characteristic of Hyskon when used in hysteroscopy. Dextran 70 works by expanding the uterine cavity, allowing for clear visualization during hysteroscopy. Its high viscosity helps maintain the uterine cavity's distension.

## Why Each Wrong Option is Incorrect
- **Option A:** Without the specific details of option A, we cannot directly address why it might be incorrect. However, if an option suggests a benefit or characteristic of Hyskon, such as effective distension or low risk of complications, and this is indeed true, then it would not be the correct answer to the question about which statement is not true.
- **Option B:** Similarly, without specifics, if option B accurately describes a property or advantage of using Hyskon, such as its ability to provide clear visualization, then it would be incorrect to say it's not true about Hyskon.
- **Option C:** If option C presents a recognized use or benefit of Hyskon in hysteroscopy, then stating it's not true would be incorrect.

## Clinical Pearl / High-Yield Fact
A key point to remember about Hyskon (dextran 70) used in hysteroscopy is that it can cause **emboli** if it enters the bloodstream, which is a significant risk. Also, Hyskon can interfere with some laboratory tests. It's essential to be aware of these potential complications and characteristics when using Hyskon.

## Correct Answer Line
**Correct Answer: D.**