This study is to perform a randomized controlled trial of comparing the manual syringe infusion method with the conventional pump infusion method to clarify if the manual syringe infusion method really needs less amount of distension medium.

Hysteroscopy is frequently used for diagnosing abnormal uterine bleeding, endometrial polyp or submucous myoma. However, hysteroscopic procedure can cause morbidity and even mortality related to infusion distension medium. We had used a manual syringe infusion method to infuse fluid for distending the uterine cavity in our institute without significant morbidity, and it seems that this method need less amount of distension medium, and possible result in less possibility of hyponatremia. Therefore, the aim of this study is to perform a randomized controlled trial of comparing the manual syringe infusion method with the conventional infusion pump method to clarify if the manual syringe infusion method really needs less amount of distension medium during hysteroscopy.

Inclusion Criteria:

• Of greater than twenty-year-old female patients suffering from abnormal uterine bleeding, suspected endometrial lesions, endometrial polyp, or submucous myoma.

Exclusion Criteria:

• Female patients of less than twenty years-old.