Saline Infused Sonogram (SIS) also known as a sonohysterogram is an ultrasound used to view the shape of the uterus and other pelvic organs. Sterile water is used to distend the uterine cavity to get a three dimensional image rather than a two dimensional one of the fibroids, polyps or the lining of the uterus. This yields better results in comparison to a standard ultrasound.
This procedure is used to detect reasons for abnormal uterine bleeding, congenital disorders of the uterus, suspected adhesions on the uterus, infertility etc. It could also be used for further evaluation of uterine abnormalities.
It should not be used in pregnant women or women with acute pelvic infection. It is usually performed in the first part of menstrual cycle after menstruation.
The risks associated with the process are rare. You may experience cramping, spotting or vaginal discharge. It may cause pelvic infection. So it is advisable to contact your doctor if you experience fever within a couple of days of performing the sonogram.