Screw delivery system and method
First Claim
1. A screw delivery system kit for providing a minimally invasive portal with a small entry angle to a surgical site, comprising:
- an outer cannula having a first exterior surface and a first interior surface defining a bore, the first interior surface having a first inner diameter and the first exterior surface having a first outer diameter, the surfaces extending along a first length on a first axis between a first proximal end having a first stop and a first distal end;
a trocar having a second exterior surface with a second outer diameter, the second exterior surface extending along a second length on a second axis between a second proximal end having a second stop and a second distal end defining a blunt tip;
a guide having a handle and a tube, the tube having a third exterior surface and a third interior surface defining a passageway, the third interior surface having a third inner diameter and the third exterior surface having a third outer diameter, the third interior surface extending between a third proximal end and a third distal end, the third exterior surface extending along a third length on a third axis between a third stop at the third proximal end and the third distal end, the handle being connected to the tube at an angle to the third axis; and
a bone drill bit having a fourth exterior surface with a fourth outer diameter extending along a fourth length on a fourth axis between a fourth stop located near a fourth proximal end and a plurality of drilling flutes defined on a fourth distal end.
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Accused Products
Abstract
A screw delivery system and method are disclosed for use in a variety of surgical indications. The screw delivery system generally comprises an outer cannula, a guide, and various interventional devices such as bone drill bits and taps as well as an implant driver for inserting a screw. The method disclosed varies by indication, but is ordinarily intended for use as a minimally invasive procedure which is a combination of percutaneous and open techniques wherein a small midline incision is made over a surgical site and the screw delivery system provides a percutaneous portal through an incision distant from the small midline incision over the surgical site.
165 Citations
20 Claims
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1. A screw delivery system kit for providing a minimally invasive portal with a small entry angle to a surgical site, comprising:
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an outer cannula having a first exterior surface and a first interior surface defining a bore, the first interior surface having a first inner diameter and the first exterior surface having a first outer diameter, the surfaces extending along a first length on a first axis between a first proximal end having a first stop and a first distal end;
a trocar having a second exterior surface with a second outer diameter, the second exterior surface extending along a second length on a second axis between a second proximal end having a second stop and a second distal end defining a blunt tip;
a guide having a handle and a tube, the tube having a third exterior surface and a third interior surface defining a passageway, the third interior surface having a third inner diameter and the third exterior surface having a third outer diameter, the third interior surface extending between a third proximal end and a third distal end, the third exterior surface extending along a third length on a third axis between a third stop at the third proximal end and the third distal end, the handle being connected to the tube at an angle to the third axis; and
a bone drill bit having a fourth exterior surface with a fourth outer diameter extending along a fourth length on a fourth axis between a fourth stop located near a fourth proximal end and a plurality of drilling flutes defined on a fourth distal end. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method of inserting a screw into a bone through a minimally invasive portal comprising:
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making a first incision for viewing over a surgical site;
making a second incision spaced apart from the first incision;
inserting an outer cannula having a bore defined between a proximal end and a distal end and a trocar through the bore into the second incision;
advancing the outer cannula and trocar toward the surgical site until the distal end contacts the surgical site;
removing the trocar from the outer cannula;
drilling an opening in the bone;
screwing a screw into the opening in the bone. - View Dependent Claims (18)
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19. A screw delivery system kit for providing a minimally invasive portal to a surgical site comprising:
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an outer cannula;
a trocar;
means for drilling an opening in a bone at the surgical site;
means for aiming said means for drilling; and
means for screwing a screw into the opening in the bone. - View Dependent Claims (20)
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Specification