[Application of cortical bone trajectory screw in elderly patients with lumbar tuberculosis].

OBJECTIVE:To explore the clinical effect of cortical bone trajectory screw technology combined with anterior mini-open debridement and prop graft for lumbar tuberculosis in elderly. METHODS:The clinical data of 22 patients with lumbar tuberculosis treated by cortical bone trajectory screw technology combined with anterior mini-open debridement and prop graft from February 2015 to December 2016 were retrospectively analyzed. There were 13 males and 9 females with an average age of (73.3±7.1) years old. The pre-operative Frankel grading showed that 2 cases were grade B, 5 cases were grade C, 6 were grade D, and 9 were grade E. Pre- and post-operative kyphosis Cobb angle, visual analogue scale (VAS), erythrocyte sedimentation rate(ESR) and the Frankel grade were analyzed, the conditions of complication, stability of internal plants, graft fusion were observed. RESULTS:All 22 patients were follow-up for 12 to 24 months with an average of (18.7±4.6) years. Two patients with contralateral psoas major muscle abscess enlarged at 3 months after operation and were cured by drainage under the guidance of type-B ultrasonic. Other 20 cases got primary healing without sinus formation and recurrence of spinal tuberculosis. At the final follow-up, the Frankel grading showed that 3 cases was grade C, 5 cases were grade D, and 14 cases were grade E. The Cobb angle, visual analogue scale (VAS), ESR were respectively decreased from preoperative(17.68±3.86)°, (6.95±2.26) points, (47.14±20.85)mm/h to (4.77±2.47)°, (2.18±1.59) points, (16.77±11.42) mm/h at final follow-up. X-ray and CT scan showed bone union for 3 to 8 months after operation, with a mean time of(4.9±1.2) months. CONCLUSIONS:It is effective method to treat lumbar tuberculosis with cortical bone trajectory screw technology combined with anterior mini-open debridement and prop graft.