Lumbosacral Vertebral Frame Type Percutaneous Pedicle Screw Placement Locator Research and Clinical Application

Abstract：Objective To develop a locator of the percutaneous lumbosacral pedicle screw placement,and investigate the clinical effect. Methods From January 2012 to December 2014,50 cases were treated in our department,including 35 pa-tients with lumbar fracture,15 patients with thoracolumbar spinal tuberculosis. There were 29 males and 21 females,with an av-erage age of 37. 1(ranging 28. 9 to 65. 3)years old. All of them were operated by percutaneous pedicle screw fixation under guiding of the locator developed by ourselves. Before operation,all patients gave their consent to use the facility. All cases were conducted a routine inspection,including heart,brain,lung,liver,kidney function,etc. to verify no diseases such as hyperten-sion,diabetes,stroke etc. Results Before operation the time for location was 3. 25 ± 1. 75 min,and the location times was 1. 26 on average,and the accuracy rate was 98. 7% . In operation the time for location was(5. 46 ± 1. 54)min,and the location times was 2. 58 on average,and the accuracy rate was 98. 8% . During the follow-up period all patients were examined by X-ray and CT,and collected the positive and lateral X-ray films of lumbosacral vertebral and CT imaging data to analyze. The inci-dence rate of complications was 0. Conclusion The application of the guide frame for percutaneous placement of lumbosacral pedicle screw and the positioning method can simplify the operation process. The facility is compact,accurate,convenient for disinfecting and stable for placing. It can shorten the positioning time,and reduce X-ray exposure times. As a result,it can de-crease the radiation exposure dose of doctors and patients. The study has provided a convenient tool for minimally invasive spi-nal surgery. It should be apply extensively in clinic.