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Sonohysterography (Saline Infusion Sonography) is a procedure where sterile saline is infused into the uterus while a transvaginal sonogram is performed. The purpose is to distend the uterine (endometrial) cavity to look for polyps, fibroids or cancer, especially in patients with abnormal uterine bleeding. The saline outlines the lesion and allows for easy visualization and measurement. Sonohysterograms are also used for patients with infertility. Saline and air are injected into the uterus and the physician looks for air bubbles passing thru the fallopian tubes, which would indicate patency of the fallopian tubes
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