Systems and Methods for Performing Spine Surgery

Abstract

Systems and methods for a spinal surgical procedure are described. Specifically systems and methods for calculating global spinal alignment are described.

We claim: 
     
         1 . A system for global alignment of a spine during spinal surgery, the system comprising an imaging device, a spatial tracking system, a control unit, and a bending device. 
     
     
         2 . A system for use during a surgical procedure, the system comprising:
 an imaging device;   a rod bending device;   a control unit configured to:
 obtain one or more preoperative measurements of an anatomical parameter of a patient; 
 obtain one or more planned target measurements of the anatomical parameter; 
 obtain an intraoperative image from the imaging device; 
 measure an intraoperative measurement of the anatomical parameter; and 
 calculate an instruction for bending a surgical rod. 
   
     
     
         3 . The system of  claim 2 , wherein the anatomical parameter is a chin brow vertical angle. 
     
     
         4 . The system of  claim 3 , wherein the chin brow axis is an angle of a patient's gaze relative to a horizontal position. 
     
     
         5 . The system of  claim 4 , wherein the control unit displays to a user a color indication of the angle of the gaze. 
     
     
         6 . The system of  claim 2 , wherein the anatomical parameter is a parameter correlated to a health related quality of life score. 
     
     
         7 . The system of  claim 2 , wherein the anatomical parameter is a parameter correlated to the alignment of a patient's head over the patient's pelvis. 
     
     
         8 . A method for assessing global alignment of the spine during a surgical procedure, the method comprising:
 inputting a planned target value of one or more spinal parameters into a control unit;   capturing one or more intraoperative fluoroscopy images into the control unit;   measuring an intraoperative value of the one or more spinal parameters;   comparing the intraoperative value of the one or more spinal parameters with the planned target value of the spinal parameters;   measuring a location of one or more screws;   calculating an instruction to bend a rod to the location of the one or more screws; and   bending the rod according to the instruction.   
     
     
         9 . The method of  claim 8 , wherein at least one of the spinal parameters is a chin brow vertical angle. 
     
     
         10 . The method of  claim 8 , wherein the method further comprises locating a point on the brow, locating a point on the chin, calculating a line between the points, and calculating an angle between the line and a vertical axis. 
     
     
         11 . The method of  claim 8  further comprising, calculating a preoperative value of the one or more spinal parameters. 
     
     
         12 . The method of  claim 8  further comprising, calculating a second target value for the one or more spinal parameters based on the comparison of the intraoperative value with the planned target value. 
     
     
         13 . The method of  claim 8 , wherein at least one of the spinal parameters is a parameter correlated to a health related quality of life score. 
     
     
         14 . The method of  claim 8 , wherein the spinal parameter is a parameter correlated to the alignment of a patient's head over the patient's pelvis. 
     
     
         15 . The method of  claim 8 , wherein at least one of the spinal parameters is cervical sagittal vertical axis. 
     
     
         16 . The method of  claim 8 , wherein at least one of the spinal parameters is T1 slope. 
     
     
         17 . The method of  claim 8 , wherein at least one of the spinal parameters is cervical lordosis.