SIS (Saline Infusion Sonohystogram)

SIS (Saline Infusion Sonohystogram) uses a saline solution and trans-vaginal ultrasound to check the health of the uterus.
An SIS is an out-patient procedure and can take less than 30 minutes. It is usually conducted after menstruation but before ovulation.

During an SIS a saline solution is slowly released into the uterine cavity which causes it to swell slightly. This makes it possible to get better quality ultrasound images of the uterus and endometrium using a trans-vaginal probe. An SIS enables a more detailed examination of fibroids, polyps, cancer and endometrial thickening.

The patency of the fallopian tubes can also be checked by seeing whether space behind the uterus fills with saline solution after it is release in the uterine cavity.

Following an SIS patients may experience mild bleeding (spotting), cramping and watery discharge.

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