Tests & investigations
Sterile saline is instilled through a fine catheter while an ultrasound is performed, separating the walls of the uterus so that polyps, fibroids pressing into the cavity, scar tissue and septa become visible.
Also known as: SIS, sonohysterogram, saline sonogram
Related Canada guides
Sources
- Society of Obstetricians and Gynaecologists of Canada (SOGC) patient information
Last reviewed: September 9, 2026. Written by the Antega Editorial Team. General information only — always follow the advice of your own clinic, doctor or pharmacist.