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Harmonic Scalpel in Video-Assisted Thoracoscopic Thymic Resections

Department of Cardiothoracic Surgery, National Heart Center, Singapore

For reprint information contact: Jia-Lin Soon, MRCS, Tel: 65 6436 7598, Fax: 65 6224 3632, Email: soon.jia.lin{at}singhealth.com.sg, Department of Cardiothoracic Surgery, National Heart Center, Mistri Wing, 17 Third Hospital Avenue, Singapore 168752.

Video-assisted thoracoscopic thymectomy is safe, but the efficacy of this technique in thymomectomy is unproved. Data of 103 consecutive patients who had thoracoscopic thymectomy and thymomectomy between 1998 and 2006 were retrospectively reviewed. Conventional monopolar diathermy and endoscopic Liga clips were used in the first 50 patients, and the Harmonic Scalpel was employed in the next 53. Only mean tumor size differed between groups (56.6 ± 18.2 vs 40.0 ± 20.8 mm in Harmonic Scalpel group). A similar number of patients had myasthenia gravis in the first group (72%) and Harmonic Scalpel group (83%). There were 49 thymomas (22 in first group, 27 in Harmonic Scalpel group). Of the earlier patients, 2 were re-explored for excessive chest tube drainage, 1 had ipsilateral phrenic nerve injury, and 2 had left phrenic nerves sacrificed intraoperatively due to thymoma invasion, but there was no significant difference in complications between groups. At a mean follow-up of 3.40 ± 2.38 years (range, 0.04–8.52 years), there was 1 thymoma recurrence in the first group. Use of the Harmonic Scalpel in video-assisted thoracoscopic thymic resection is safe and confers some advantages over conventional methods of dissection.