[Spinal navigation with intra-operative 3D-imaging modality in lumbar pedicle screw fixation].

Objective To evaluate the efficacy and Bafety of spinal navigation with intra-operative 3D-imasing madality in lumbar pedicle screw fixation.Methods 401 patients with lumbar degenerativedisorders or fracture were randomly divided into 2 groups:Group A,undergoing pedicle screw fixation by spinal navigation with inca-operative 3D-imaging system,and Group B undergoing pedicle screw fixation by traditional method.The position of pedicle screw was assessed by intr-operative 3D-imaging system.Theexcellent rate of pedicle screw position,mean time of pedicle Screw implantation,operating time,blood loss,and post-operative complication were compared.Results The excellent rate of pedicle screw position was higher Group A wag 95.3%,significantly higher than that of Group B(84.1%,P＜0.001).The mean time of pedicle screw implantation and operating time of Group A were(3.70±0.65)min,significantly shorter than that of Group B[(7.83±2.32)min,P＜0.1301].The blood loss amount ofGroup A was(272±153) ml,significantly less than that of Group B[(455±289)ml,P＜0.05].However,the total operating time of Group A Was(134±48)min,not significantly different from that of Group B[(179 ±62)min,P＞0.05].Conclusion With spinal navigation combined with the intra-operative 3D-imaging modality,implantation of lumbar pedicle screw is more simplified,more accurate,safer,and with shorter operating time. Key words: Spinal diseases; Therapy,computer-assisted; Imaging,three-dimension