Adjustable depth drill guide
The present disclosure in one aspect provides an adjustable depth drill guide comprising a trigger assembly further comprising a trigger and a primary actuating element and a telescopic rotational assembly which abuts the primary actuating element and further comprises an intermediate actuating element. The drill guide described herein allows a surgeon to adjust the depth of the drill guide using only one hand while in-situ.
1. A drill guide comprising:
a trigger assembly further comprising a trigger and a primary actuating element; and
a telescopic rotational assembly which abuts the primary actuating element and further comprises an intermediate actuating element.
2. A drill guide as in claim 1 , wherein the trigger assembly is further comprised of a distal spring which wraps around the primary actuating element.
3. A drill guide as in claim 2 , wherein the primary actuating element is a hollow cylinder with a proximal and distal end.
4. A drill guide as in claim 3 , wherein the primary actuating element contains a recess.
5. A drill guide as in claim 4 , wherein the intermediate actuating element is a hollow cylinder with a plurality of male rails, a plurality of arms and a distal and proximal end.
6. A drill guide as in claim 5 , wherein the intermediate actuating element has two arms having a ramped and straightened portion and configured so that the ramped and straightened portion are adjacent to one another with a spaced formed there between the two arms.
7. A drill guide as in claim 6 , wherein the telescopic rotational assembly is further comprised of an inner guide, a sheath and a proximal spring which wraps around the inner guide.
8. A drill guide as in claim 7 , wherein the inner guide is a hollow cylinder having a male threaded portion and a plurality of control pins.
9. A drill guide as in claim 8 , wherein the sheath is a hollow cylinder with a plurality of female rail slots, a female threaded portion and a distal and proximal end.
10. A drill guide as in claim 9 , wherein the inner guide is threaded to the sheath so that the sheath rotates about the inner guide distally.
11. A drill guide as in claim 10 , wherein intermediate actuating element rotates about the inner guide.
12. A drill guide as in claim 11 , wherein the primary actuating element translates laterally along the inner guide.
13. A drill guide as in claim 12 , wherein the drill guide is further comprised of a shell enclosing the trigger assembly and the telescopic rotational assembly.
14. A drill guide as in claim 13 , wherein the shell is comprised of a handle, a frame, a shaft and a guide which connects to the sheath.
15. A drill guide as in claim 14 , wherein the frame has a lower portion and a vertical element further comprising of a distal and proximal opening.
16. A drill guide as in claim 15 , wherein the handle is connected to the lower portion of the frame.
17. A drill guide as in claim 16 , wherein the shaft is a hollow cylinder and abuts the vertical element of the frame.
18. A drill guide as in claim 17 , wherein the sheath translates laterally within the shaft.
19. A method of drilling a bone screw pilot hole, the method comprising:
placing a drill guide over a bone in which the pilot hole is to be drilled, wherein the drill guide comprises a trigger assembly further comprising a trigger and a primary actuating element and further comprises an intermediate actuating element;
wherein an intended depth of the pilot hole may be increased by a surgeon without removing the drill guide from over the bone.