Spinal surgical instrument, method of guiding thereof and system for bone stabilization

Abstract

The present invention discloses a spinal surgical instrument and a method of guiding thereof. The spinal surgical instrument is operated with a precedent device. The precedent device includes at least one guiding unit. The spinal surgical instrument includes an operating element, an extending element, a handling element and a guide element. One end of the extending element connects to the operating element. The other end of the extending element connects to the handling element. The guide element is disposed on the extending element and includes at least one guide hole. The operating element is guided to the precedent device by the passing of the guide hole along the guiding unit.

What is claimed is: 
     
         1 . A spinal surgical instrument operated with a precedent device including at least one guiding unit, the spinal surgical instrument comprising:
 an operating element;   an extending element, one end of which is connected to the operating element;   a handling element, which is connected to the opposite end of the extending element; and   a guide element, which is disposed on the extending element and has at least one guide hole; by passing of the guide hole along the guiding unit, the spinal surgical instrument is guided to the precedent device.   
     
     
         2 . The spinal surgical instrument as claimed in  claim 1 , wherein the guide element is set in the extending element or integrally formed with the extending element. 
     
     
         3 . The spinal surgical instrument as claimed in  claim 2 , wherein the distance between the guide element and the operating element is shorter than the distance between the guide element and the handling element. 
     
     
         4 . The spinal surgical instrument as claimed in  claim 3 , wherein the distance between the guide element and the operating element is about 0 mm. 
     
     
         5 . The spinal surgical instrument as claimed in  claim 1 , wherein the width of the guide element close to one end of the handling element is greater than the width of the guide element close to one end of the operating element. 
     
     
         6 . The spinal surgical instrument as claimed in  claim 1 , wherein the guide element has a groove located at the periphery of the guide hole, by which the guide hole communicates with the outer space. 
     
     
         7 . The spinal surgical instrument as claimed in  claim 6 , wherein the guide element has a blocker located between the groove and the guide hole. 
     
     
         8 . The spinal surgical instrument as claimed in  claim 1 , wherein the guide element has at least two guide holes located on the opposite side of the extending element along a center line described by the extension of the extending element. 
     
     
         9 . The spinal surgical instrument as claimed in  claim 1 , wherein the operating element has at least one longitudinal groove, the spinal surgical instrument comprising:
 an adjustable element; and   a rod element, which is disposed through the handling element, the extending element, and part of the operating element, the rod element being movably connected with the adjustable element, and the opposite end thereof being accommodated in the operating element;   the adjustable element being moved to drive the rod element to move within the operating element such that the operating element expands.   
     
     
         10 . The spinal surgical instrument as claimed in  claim 9 , wherein the operating element has an accommodating space, the rod element has an expansion head accommodated in the accommodating space, and the outer wall slope of the expansion head is greater than the inner wall slope of the accommodating space. 
     
     
         11 . The spinal surgical instrument as claimed in  claim 1 , wherein the distance between the guide element and the operating element is about 0 mm, and the guide element has a bottom edge and a side wall, wherein the bottom edge is connected to the operating element, and the side wall is partially connected to the extending element. 
     
     
         12 . The spinal surgical instrument as claimed in  claim 11 , wherein the guide hole runs through the side wall. 
     
     
         13 . The spinal surgical instrument as claimed in  claim 1 , wherein the guide element has at least two guide holes, one of which is adjacent to the extending element and the other of which is adjacent to the operating element, and the guide holes communicate with each other. 
     
     
         14 . The spinal surgical instrument as claimed in  claim 1 , wherein the spinal surgical instrument is a pre-lock wrench, a pedicle screw adjuster, a rod holder, a bone cement or repair material injector, an anti-torque wrench, or a breaker. 
     
     
         15 . A method of guiding a spinal surgical instrument to a precedent device which includes at least one guiding unit, the spinal surgical instrument comprising an operating element, an extending element, a handling element, and a guide element; an end of the extending element connects to the operating element, and the opposite end of the extending element connects to the handling element, the guide element being disposed on the extending element and including at least one guide hole, the method comprising the following steps:
 passing the guide hole along the guiding unit; and   guiding the spinal surgical instrument to the precedent device.   
     
     
         16 . The method as claimed in  claim 15 , further comprising the step of:
 placing the precedent device into a patient's body, and allowing the guiding unit to be at least partially exposed outside the patient's body.   
     
     
         17 . The method as claimed in  claim 16 , further comprising the step of:
 assembling the guiding unit with the precedent device before placing the precedent device into the patient's body.   
     
     
         18 . The method as claimed in  claim 15 , further comprising the step of:
 moving the guiding unit toward the precedent device by use of the guide hole, such that the operating element is assembled with the precedent device.   
     
     
         19 . A system for bone stabilization, comprising:
 a first precedent device that includes at least one first guiding unit;   a second precedent device that includes at least one second guiding unit;   a spinal fixation element; and   at least one spinal surgical instrument comprising:
 an operating element; 
 an extending element, one end of which is connected to the operating element; a handling element, which is connected to the opposite end of the extending element; and 
 a guide element, which is disposed on the extending element and has at least one guide hole; by the passing of the guide hole along the first and second guiding units, the spinal surgical instrument is guided to the first and second precedent devices to connect them with the spinal fixation element. 
   
     
     
         20 . The system as claimed in  claim 19 , wherein the spinal surgical instrument is a pre-lock wrench, a pedicle screw adjuster, a rod holder, a bone cement or repair material injector, an anti-torque wrench, or a breaker.