In order to enter the hysteroscopic equipment into the uterine cavity, the cervix must generally be dilated (to at least the diameter of the hysteroscope). Once a resectoscope is placed within the cavity of the uterus, the working element can be extended or retracted using the thumb support and electrocautery applied via a foot pedal under the control of the operating surgeon. Inflow and outflow of fluid is controlled by the surgeon using the inflow and outflow stopcocks.
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