Saline Infusion Sonography
Saline infusion sonography, or SIS, is a procedure which looks for intrauterine abnormalities. During the procedure a speculum is placed in the vagina, and a thin catheter is gently placed through the cervix. At this point, the speculum is removed, and the transvaginal ultrasound probe is introduced. While the sonogram images are being obtained, the saline is injected through the catheter. This allows for discrete evaluation of the uterine cavity and lining for abnormalities such as fibroids, polyps, or scar tissue. There is usually only minor cramping associated with the procedure, and it is recommended to take 600mg of Motrin prior to the appointment time.