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Eur J Cardiothorac Surg 2005;27:361-366
© 2005 Elsevier Science NL

Manubriotomy versus median sternotomy in thymectomy for myasthenia gravis. Evaluation of the pulmonary status

^a Thoracic Surgery Department, Evangelisches Krankenhaus Duisburg-Nord, Fahrner Str. 133, Duisburg 47169, Germany
^b Chest Surgery department, Faculty of Medicine, Cairo University, Cairo, Egypt
^c Cardiothoracic Surgery departments, Faculty of Medicine, Cairo University, Cairo, Egypt

Received 3 September 2004; received in revised form 19 November 2004; accepted 22 November 2004.

^* Corresponding author. Tel.: +49 203 508 5996; fax: +49 203 508 1913. (E-mail: boseila{at}gmx.de).

Objective: In a prospective study, the effect of thymectomy on the pulmonary status of 50 consecutive patients with myasthenia gravis was evaluated over a time range of 4 years in the Chest and Chest surgery departments in the Cairo University Clinics and Thoracic Surgery Department of the Evangelisches Krankenhaus Duisburg-Nord. Methods: The patients were divided into two groups: Group I included 26 patients who underwent thymectomy through median sternotomy. The mean age of the patients in this group was 24.8±10.5 (5–41) years. They were 19 females and seven males. Thirteen of the patients were in Myasthenia Gravis Foundation of America (MGFA) class IIa, and 12 were in class IIb, and one was in class IIIa. Group II included 24 patients who underwent thymectomy through manubriotomy. The mean age of the patients in this group was 25.2±9.2 (12–41) years. They were 13 females and 11 males. Eight of the patients were in MGFA class 2a, 14 were in class IIb, and two were in class IIIa. Results: When compared to group I in which postoperative ventilation was required in 15.4% of patients, postoperative ventilation was not necessary in patients of group II with a statistically significant difference (P=0.04). The mean duration of stay in the intensive care unit was 111.4h in group II, and 169.7h in group I (P=0.03). The peak inspiratory flow rate and the forced vital capacity were also statistically significantly better in group II. There was no mortality in both groups, and the morbidity was higher in the median sternotomy group. Conclusion: Thymectomy through a manubriotomy, which allows extensive removal of ectopic thymic tissue in addition to the thymus through a less invasive approach than a full median sternotomy, is associated with a significantly smoother postoperative course and less pulmonary complications, when compared with thymectomy through a full median sternotomy.

Key Words: Manubriotomy • Sternotomy • Myasthenia gravis • Pulmonary function

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