Originally Posted by estria
For the transvaginal one, they do insert the wand into your vagina but there is no saline solution involved as was previously described (this is called a hysteroscopy and it is used for certain procedures where they have to inflate the uterus in order to see better .. the uterus is folded in on itself when at rest .. the transvaginal ultrasound only involves the wand in the vagina .. that's it!).
No, the saline ultrasound is called a sonohysterogram
. That's when they fill the uterus with water to expand it to allow for better viewing of it. It still uses sound waves to view the uterus the way a regular ultrasound does, just with water in the uterus.
The hystroscopy is the procedure that is done with a hysteroscope, which is a type of telescope that they use to view the inside of the uterus to remove polyps. It's like looking at something under a magnifying glass or a microscope.