Thyroidectomy is one of the most surgeries done by surgeons. Postoperative bleeding is a main complication for this surgery.surgeons usually do homeostasis by traditional diathermy as it is cheep and available in all hospitals and centres.

Atlternatinve surgery devices have become popular to conventional hemostasis in thyroid surgery. These devices reduce operative time and post-operative complication .Investigators thought to examine relative efficiency of two alternative energy devices compared to each other in preventing post-operative complication between diathermy and ligasure.

Thyroid surgery is one of the most frequently performed surgical procedures worldwide . Nowadays, total thyroidectomy is the recommended procedure for thyroid disease . As total thyroidectomy is the procedure of choice, the most common complication resulting after this surgery is transient hypocalcemia - the incidence being 24% - which increases the morbidity rate and increases the length of hospitalization. Other complications of thyroidectomy include recurrent laryngeal nerve injury which leads to hoarseness of voice, postoperative hemorrhage, dysphagia due to inflammation of the tissues surrounding the esophagus, seroma formation, Horner's syndrome due to injury to the cervical sympathetic chain, and poor healing of the wound with hypertrophy of the scar or wound infection .

Atlternatinve surgery devices have become popular to conventional hemostasis in thyroid surgery. These devices reduce operative time and post-operative complication .Investigators thought to examine relative efficiency of two alternative energy devices compared to each other in preventing post-operative complication between diathermy and ligasure.

Inclusion Criteria:

• • Patient with disburbed thyroid function and candidate for for thyroidectomy

Exclusion Criteria:

• Low preoperative calcium level and Patient with contraindication of uses of ligasure or diathermy.