Glucose solution. When performing unipolar electrocoagulation or electrosurgical resection, 5% glucose solution, which is not conductive, must be selected as uterine dilation fluid. Monopolar electrocoagulation generally refers to an electrosurgical pen, with a large metal plate in contact with the patient's buttocks as one of the clicks. In order to be used with the negative plate of electrosurgical pen, there are usually two function buttons on unipolar electrocoagulation pen.