Thymectomy is a major surgical procedure for patients with non-thymomatous myasthenia gravis，and can enhance their symptomatic remission rate and cure rate. There is still much controversy about appropriate surgical approach and extent of resection of thymectomy. The majority of thoracic surgeons believe that the completeness of thymectomy is closely associated with clinical symptom improvement，and perform complete resection of encapsulated thymus and surroun-ding fat tissues via mid-sternotomy. But minimally invasive thymectomies are often more acceptable by patients. On the contrary，in view of common existence of ectopic thymus tissue，some thoracic surgeons advocate a combination of cervical incision and sternotomy in order to further completely remove all thymus tissue.
Objective To investigate application values and techniques of robot-assisted extended thymectomy for the treatment of typeⅠmyasthenia gravis （MG） using Da Vinci S system. Methods We retrospectively analyzed clinical data of 3 patients with MG who underwent robot-assisted extended thymectomy in General Hospital of Shenyang Military Command from March 2012 to September 2012. All the patients were ocular MG （typeⅠ） including 2 men （33 years and 66 years old respectively） and 1 woman （21 years old）. Surgical outcomes were analyzed. Results All the 3 patients successfully received robot-assisted extended thymectomy without accessorial incisions. None of the patients required converting to open sternotomy or postoperative reexploration for bleeding. Intraoperative blood loss was 5-10 ml．Overall operation time was95-138 minutes, and thymoma dissection time was 26-80 minutes. No myasthenic crisis or other major postoperative complic-ation occurred. Postoperative chest drainage duration was 3-9 days and postoperative hospital stay was 10-15 days. Two patientswere followed up for 6-12 months after discharge without MG recurrence. Conclusion Robot-assisted extended thymectomy is safe and feasible for the treatment of typeⅠMG with satisfactory results．
Abstract: Objective To investigate the value of videoassisted thoracoscopic surgery (VATS) in the treatment of myasthenia gravis (MG) by comparing the early clinical outcomes of extensive thymectomy of VATS and median sternotomy. Methods 195 patients who received extended thymectomy for MG from July 1998 to May 2007 in our department were divided into two groups by operative approach, 83 patients in the VATS group (from April 2002 to May 2007) and 112 patients in the full median sternotomy group(from July 1998 to May 2007). The clinical features, such as operative time, operative blood loss, postoperative drainage, the incidence of crisis, duration of crisis (time of mechanical ventilation), were retrospectively analysed by independent samples t test or chisquare test to evaluate the early outcomes.Results The postoperative drainage in the VATS group was more than that in the median sternotomy group (164.65±38.19ml vs. 98.26±26.84ml, P=0.023), and the operative blood loss in the VATS group was less than that in the median sternotomy group（53.24±11.69ml vs. 97.37±24.61ml,P=0.036）. The incidence of crisis in the VATS group was 4.82%（4/83），which was less than that in the median sternotymy group ［13.39%(15/112), P=0.046,OR=3.054］. And the persistence time of mechanical ventilation for post-operative crisis in the VATS group was much shorter than that in median sternotomy group （75.33±39.31h vs. 189.20±89.74h, P=0.012）. Conclusion VATS extended thymectomy for myasthenia gravis is safe and less invasive. It can decrease the incidence of crisis and the time of mechanical ventilation of crisis, as well as decreasing operative blood loss.