VIDEO-ASSISTED THORACOSCOPIC TREATMENT OF SPINAL LESIONS IN THE THORACOLUMBAR JUNCTION

Background: The endoscopic treatment of spinal lesions in the thoracol umbar junction (T11-L2) poses a great challenge to the surgeon. From N ovember 1, 1995 to December 31, 1996, we successfully used a combinati on of video-assisted thoracoscopy and conventional spinal instruments to treat 38 patients with anterior spinal lesions. Twelve of them had lesions in the thoracolumbar junction. Methods: The so-called extended manipulating channel method was used to perform vertebral biopsy, dis cectomy, decompressive corpectomy, interbody fusions, and/or internal fixations in these patients. The size of the thoracoscopic portals was greater than usual in order to allow conventional spinal instruments and a thoracoscope to enter the chest cavity freely and be manipulated by techniques similar to those used in standard open surgical procedu res. In this series, the procedures were performed by using either a t hree-portal approach (2.5-3.5 cm) or a modified two-portal technique i nvolving a 5-6 cm larger incision and a small one for introducing the scope. Results: None of the operations resulted in injury to the great vessels, internal organs, or spinal cord. The total time for the oper ation ranged from 1.5 to 4.5 h (average, 3); and the total blood loss ranged from 50 to 3000 cc (average, 1050). One patient was converted t o an open procedure due to severe pleural adhesion. Complications incl uded two instances of transient intercostal neuralgia, one superfical wound infection, and one residual pneumothorax. Conclusions: The video -assisted technique with the extended manipulating channel method pres ented in this report simplifies thoracoscopic spinal surgery in the th oracolumbar junction and makes it easier. It avoids division of the di aphragm, removal of the rib, and wide spread of the intercostal space, and it allows greater control of intraoperative vessel bleeding. Usin g this technique, the number of portals required during the procedure can be reduced. In addition, the technique reduces the endoscopic mate rials required, thus lowering overall cost. It is an effective and pro mising approach.