38. Trends in total charges and utilization of computer-assisted navigation in thoracolumbar spine surgery

2021 ◽  
Vol 21 (9) ◽  
pp. S19
Author(s):  
Calista Dominy ◽  
Justin Tang ◽  
Varun Arvind ◽  
Eric Geng ◽  
Jun Kim ◽  
...  
2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Xiaojian Liu ◽  
Hairun Liu ◽  
Yushan Wang

AbstractIn this study, a new percutaneous multi-function pedicle locator was designed for personalized three-dimensional positioning of a pedicle in minimally invasive spine surgery (MISS) without computer-assisted navigation technology. The proposed locator was used in a number of patients during MISS, and its advantages were analyzed. Based on the position of a pedicle determined by computed tomography (CT) and fluoroscopic images of a patient, 6 lines and 2 distances were used to determine the puncture point of a pedicle screw on skin, while 2 angles were used to indicate the direction of insertion of a pedicle guide needle from the patient's body surface. The results of the proposed locator were compared with those of the conventional freehand technique in MISS. The potential benefits of using the locator included enhanced surgical accuracy, reduced operation time, alleviation of the harmful intra-operative radiation exposure, lower costs, and shortened learning curve for young orthopedists.


2020 ◽  
Vol 6 (1) ◽  
pp. 136-144
Author(s):  
Nicholas Wallace ◽  
Nathaniel E. Schaffer ◽  
Brett A. Freedman ◽  
Ahmad Nassr ◽  
Bradford L. Currier ◽  
...  

Author(s):  
D Guha ◽  
R Jakubovic ◽  
VX Yang

Background: Computer-assisted navigation (CAN) may guide spinal instrumentation, and requires alignment of patient anatomy to imaging. Iterative-Closest-Point algorithms register anatomical and imaging datasets, which may fail in the presence of significant geometric congruence leading to inaccurate navigation. We computationally quantify geometric congruence in posterior spinal exposures, and identify predictors of potential navigation inaccuracy. Methods: Midline posterior exposures were performed from C1-S1 in four human cadavers. An optically-based CAN generated surface maps of the posterior elements at each level. Maps were reconstructed to include bilateral hemilamina, or unilateral hemilamina with/without the base of the spinous process. Maps were fitted to symmetrical geometries (cylindrical/spherical/planar) using computational modelling, and the degree of model fit quantified. Results: Increased cylindrical/spherical/planar symmetry was seen in the subaxial cervical spine relative to the high-cervical and thoracolumbar spine (p<0.001). Inclusion of the base of the spinous process decreased symmetry independent of spinal level (p<0.001). Registration with bilateral vs. unilateral hemilamina did not significantly reduce geometric symmetry. Conclusions: Geometric congruence is most evident at C1 and the subaxial cervical spine, warranting greater vigilance in navigation accuracy verification. At all levels, inclusion of the base of the spinous process in unilateral registration decreases the likelihood of geometric symmetry and navigation error.


2021 ◽  
Author(s):  
Xiaojian Liu ◽  
Hairun Liu ◽  
Yushan Wang

Abstract A new percutaneous multi-function pedicle locator was designed to be used for personalized three-dimensional positioning of a pedicle in minimally invasive spine surgery without computer-assisted navigation technology. This article instructed the method and advantages of using a new percutaneous multi-function pedicle locator in minimally invasive surgery of the spine. Based on the position of a pedicles suggested by CT and X-ray images of a patient, 6 lines and 2 distances were used to determine the puncture point of a pedicle screw, while 2 angles were used to determine the inserting direction of a pedicle guide needle from the patient's body surface. The result of application of the locator was roughly compared with that of the conventional freehand technique. The potential benefits of using the locator included enhancing surgical accuracy, reducing the operation time, mitigating the harmful intra-operative radiation exposure, saving the costs and shortening the learning curve of young orthopedists. It was hoped that more doctors and patients will benefit from it.


2021 ◽  
Vol 21 (Supplement_1) ◽  
pp. S23-S38
Author(s):  
Elie Massaad ◽  
Ganesh M Shankar ◽  
John H Shin

Abstract Computer-assisted navigation has made a major impact on spine surgery, providing surgeons with technological tools to safely place instrumentation anywhere in the spinal column. With advances in intraoperative image acquisition, registration, and processing, many surgeons are now using navigation in their practices. The incorporation of navigation into the workflow of surgeons continues to expand with the evolution of minimally invasive techniques and robotic surgery. While numerous investigators have demonstrated the benefit of navigation for improving the accuracy of instrumentation, few have reported applying this technology to other aspects of spine surgery. Surgeries to correct spinal deformities and resect spinal tumors are technically demanding, incorporating a wide range of techniques not only for instrumentation placement but also for osteotomy planning and executing the goals of surgery. Although these subspecialties vary in their objectives, they share similar challenges with potentially high complications, invasiveness, and consequences of failed execution. Herein, we highlight the utility of using spinal navigation for applications beyond screw placement: specifically, for planning and executing osteotomies and guiding the extent of tumor resection. A narrative review of the work that has been done is supplemented with illustrative cases demonstrating these applications.


2014 ◽  
Vol 75 (S 02) ◽  
Author(s):  
S. Heredero ◽  
J. Solivera ◽  
A. Candau ◽  
A. Dean ◽  
F. Alamillos ◽  
...  

2021 ◽  
Author(s):  
Timothy J Yee ◽  
Michael J Strong ◽  
Matthew S Willsey ◽  
Mark E Oppenlander

Abstract Nonunion of a type II odontoid fracture after the placement of an anterior odontoid screw can occur despite careful patient selection. Countervailing factors to successful fusion include the vascular watershed zone between the odontoid process and body of C2 as well as the relatively low surface area available for fusion. Patient-specific factors include osteoporosis, advanced age, and poor fracture fragment apposition. Cervical 1-2 posterior instrumented fusion is indicated for symptomatic nonunion. The technique leverages the larger posterolateral surface area for fusion and does not rely on bony growth in a watershed zone. Although loss of up to half of cervical rotation is expected after C1-2 arthrodesis, this may be better tolerated in the elderly, who may have lower physical demands than younger patients. In this video, we discuss the case of a 75-yr-old woman presenting with intractable mechanical cervicalgia 7 mo after sustaining a type II odontoid fracture and undergoing anterior odontoid screw placement at an outside institution. Cervical radiography and computed tomography exhibited haloing around the screw and nonunion across the fracture. We demonstrate C1-2 posterior instrumented fusion with Goel-Harms technique (C1 lateral mass and C2 pedicle screws), utilizing computer-assisted navigation, and modified Sonntag technique with rib strut autograft.  Posterior C1-2-instrumented fusion with rib strut autograft is an essential technique in the spine surgeon's armamentarium for the management of C1-2 instability, which can be a sequela of type II dens fracture. Detailed video demonstration has not been published to date.  Appropriate patient consent was obtained.


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