Diagnostic hysteroscopy is used to diagnose problems of the uterus. Diagnostic hysteroscopy is also used to confirm results of other tests, such as hysterosalpingography (HSG). HSG is an X-ray dye test used to check the uterus and fallopian tubes. Operative hysteroscopy is used to correct an abnormal condition that has been detected during a diagnostic hysteroscopy. If an abnormal condition was detected during the diagnostic hysteroscopy, an operative hysteroscopy can be performed at the same time, avoiding the need for a second surgery. During operative hysteroscopy, small instruments used to correct the condition are inserted through the hysteroscope.