Medico-economic Evaluation Comparing the Use of Ultrasonic Scissors to the Conventional Techniques of Haemostasis in Thyroid Surgery by Cervicotomy

Inclusion Criteria: * Age \> or = 18 yrs * With a toxic goiter or not, Graves' disease or thyroid nodule requiring a total thyroidectomy * Thyroidectomy under cervicotomy * No echographic criteria to suspect a cancer: poorly defined nodules, microcalcifications, cervical nodes * Patient covered by social security * Patient's informed and written consent * Possible follow-up during 6 months Exclusion Criteria: * Minors and adults under guardianship * Preoperatively known thyroid cancer by cytology * Planned partial thyroidectomy * Peri-operatively antiplatelet intake * Preoperatively ENT examination (if performed) finding a vocal cords affection * Diving goiter (\> 3 cm below the sternal notch) * Surgery using videoscopy * Lack of possible monitoring during the 6 months after surgery * History of anterior cervical surgery * Pregnancy and breast-feeding * hypercalcemia (calcemia\> 2.6 mmol/l)