Surgical instrument with integrated reduction and distraction mechanisms
View Patent ↗Embodiments of a surgical instrument disclosed herein can include mechanisms for reduction and distraction as well as compression. Some embodiments of the surgical instrument may comprise a reducer knob having a first passage through which a first shaft of a driver is acceptable, a connecting element coupled to the reducer knob and having a second passage through which the first shaft of the driver is acceptable, a compressor handle coupled to the connecting element at a first end and having a through hole, and a common handle coupled to the compressor handle via the through hole and pivots between the reducer knob and the compressor handle. With embodiments of a surgical instrument disclosed herein, surgical personnel can distract and hold vertebrae in a distracted state and perform a reduction without having to switch or add instruments. Some embodiments disclosed herein can be particularly useful for reducing spondylolisthesis during posterior fixation.
1. A surgical instrument with integrated mechanisms for distraction, compression, and reduction of vertebrae, comprising:
a reducer knob having an aperture extending therethrough;
a reducer tube coupled to said reducer knob;
a connecting element coupled to said reducer knob and said reducer tube, wherein said reducer knob aperture, said connecting element, and said reducer tube have an inner diameter that accommodates a distractor handle, wherein the reducer knob, reducer tube and connecting element are longitudinally aligned;
a common handle pivotally coupled to said connecting element;
a compressor handle coupled to said connecting element and said common handle; and
a shaft fixedly attached to or made part of said common handle, wherein moving said common handle towards said distractor handle increases a distance between said shaft and said reducer tube, wherein moving said common handle towards said compressor handle decreases said distance between said shaft and said reducer tube, wherein turning said reducer knob in a first direction extends a height of said reducer tube, and wherein turning said reducer knob in a second direction retracts a portion of said reducer tube into said reducer knob.
2. The surgical instrument of claim 1 , wherein said compressor handle is coupled to said connecting element and said common handle such that the common handle is disposed between said compressor handle and said reducer knob.
3. The surgical instrument of claim 1 , wherein said compressor handle has an L-shape.
4. The surgical instrument of claim 2 , further comprising a dial coupled to said compressor handle and a pivot locking knob coupled to said common handle, wherein turning said dial adjusts a distance between said compressor handle and said common handle and wherein locking said pivot locking knob locks said distance between said compressor handle and said common handle.
5. The surgical instrument of claim 1 , wherein said reducer tube has cutouts to straddle a rod.
6. The surgical instrument of claim 1 , wherein said inner diameter of said reducer tube further accommodates an extender sleeve.
7. The surgical instrument of claim 1 , wherein said reducer tube has a non-threaded end for engaging a counter torque tube.
8. The surgical instrument of claim 1 , further comprising:
a pivot locking knob coupled to said common handle, wherein locking said pivot locking knob locks said distance between said shaft and said reducer tube.
9. The surgical instrument of claim 1 , further comprising a driver, wherein said distractor handle is part of said driver.
10. The surgical instrument of claim 1 , further comprising a locking mechanism having a first portion, a second portion, and a lock, wherein said first portion and said second portion are attachable to said distractor handle and said common handle.
11. The surgical instrument of claim 10 , wherein said locking mechanism is a surgical ratchet.
12. The surgical instrument of claim 1 , wherein a ratchet arm is coupled to said common handle to ratchet with said distractor handle.
13. A surgical instrument, comprising:
a reducer knob having a first passage through which a first shaft of a driver is acceptable, wherein a reducer tube is coupled to said reducer knob;
a connecting element coupled to said reducer knob and having a second passage through which said first shaft of said driver is acceptable:
a compressor handle coupled to said connecting element at a first end and having a through hole; and
a common handle coupled to said compressor handle via said through hole, said common handle pivoting between said reducer knob and said compressor handle.
14. The surgical instrument of claim 13 , wherein said compressor handle has an L-shape.
15. The surgical instrument of claim 13 , wherein said through hole has an elongated shape that allows said common handle to travel a distance along a longitudinal axis, further comprising:
a dial coupled to said compressor handle for adjusting said distance; and a locking knob coupled to said common handle for locking said common handle at a desired position and angle.
16. The surgical instrument of claim 13 , further comprising:
a locking mechanism coupled to said common handle for locking said common handle at a desired position and angle.
17. The surgical instrument of claim 13 , further comprising:
a second shaft fixedly attached to or made part of said common handle, wherein moving said common handle towards said first shaft of said driver increases a distance between said second shaft and said reducer tube, wherein turning said reducer knob in a first direction extends a height of said reducer tube, wherein turning said reducer knob in a second direction retracts a portion of said reducer tube into said reducer knob, and wherein moving said common handle towards said compressor handle decreases said distance between said shaft and said reducer tube.
18. The surgical instrument of claim 17 , wherein said reducer tube has cutouts to straddle a rod.
19. The surgical instrument of claim 17 , wherein said reducer tube has an inner diameter that accommodates an extender sleeve.
20. The surgical instrument of claim 17 , wherein said reducer tube has a non-threaded end for engaging a counter torque tube.
21. The surgical instrument of claim 13 , wherein a ratchet arm is coupled to said first shaft to ratchet with said common handle.
22. The surgical instrument of claim 13 , wherein said compressor handle has one or more weight reducing windows.
23. The surgical instrument of claim 13 , wherein said common handle has one or more weight reducing windows.