Guide for drilling an irregular-shaped body

Patent metadata

Field	Value
Publication number	US-9504482-B2
Application number	US-201113098930-A
Country	US
Kind code	B2
Filing date	May 2, 2011
Priority date	Apr 30, 2010
Publication date	Nov 29, 2016
Grant date	Nov 29, 2016

Abstract

The present invention provides a surgical instrument for guiding a drill into bone, the surgical instrument comprising; an elongate body comprising a shaft having a handle towards its proximal end and a head towards its distal end, wherein the head comprises a mouth and jaw assembly, and the shaft comprises a lumen aligned with the longitudinal axis of the shaft and extending from the proximal end of the surgical instrument to the mouth of the shaft, wherein the lumen is suitable for receipt and passage of a drill, and the jaw assembly comprises a pair of opposed reciprocating arms.

First claim

The invention claimed is:

1. A surgical instrument comprising:
an elongate body comprising a shaft having a handle towards its proximal end and a head towards its distal end, the head comprising a mouth and a jaw assembly, wherein the jaw assembly comprises a pair of arms laterally offset from one another about a longitudinal axis of the shaft;
an actuating mechanism positioned within an interior of the shaft and having a proximal end and a distal end, the actuating mechanism being adapted to move the arms of the jaw assembly between a first open position, a second substantially closed position, and intermediate positions therebetween, wherein the actuation mechanism is configured to cause each of the arms to rotate relative to the shaft along a different rotational axis; and
a lumen aligned with a longitudinal axis of the shaft, extending from a proximal end of the surgical instrument to the mouth of the shaft, wherein the lumen is suitable for receipt and passage of a drill or drillpiece so as to enable the drill or drillpiece to pass through the jaw assembly;
wherein the actuating mechanism is interposed between an interior surface of the shaft and an exterior surface of a wall defining the lumen.

2. The instrument according to claim 1 , wherein the mouth further comprises engaging means suitable for engaging with the bone.

3. The instrument according to claim 2 , wherein the engaging means are located at a periphery of the mouth.

4. The instrument according to claim 2 , wherein the engaging means comprises one or more sharpened teeth.

5. The instrument according to claim 1 , wherein the pair of arms are operable in a plane which passes through the longitudinal axis of the shaft.

6. The instrument according to claim 1 , wherein the jaw assembly further comprises a second pair of arms distinct from the first pair of arms, wherein the arms include pin pivots and wherein each of the arms rotates along a different rotational axis.

7. The instrument according to claim 6 , wherein the two pairs of arms of the jaw assembly are operable within different planes.

8. The instrument according to claim 7 , wherein the two pairs of arms of the jaw assembly are operable within substantially perpendicular planes.

9. The instrument according to claim 1 , wherein the arms of the jaw assembly each include an inner surface that curves or otherwise angles toward the longitudinal axis whereby the arms form a non-enclosed space between the arms even when the jaws are closed.

10. The instrument according to claim 1 , wherein the arms include pin pivots and wherein one or more of the arms is an elongated prong having a sharpened distal tip.

11. The instrument according to claim 1 , wherein each arm comprises a paddle at its respective distal end.

12. The instrument according to claim 11 , wherein each paddle includes one or more inwardly facing projections.

13. The instrument according to claim 12 , wherein the inwardly facing projections are substantially perpendicular to the longitudinal axis of the shaft when the jaw assembly is in the substantially closed position.

14. The instrument according to claim 12 , wherein inner surfaces of the inwardly facing projections comprise gripping surfaces which includes a series of studs, serrations or ribs, or a combination thereof.

15. The instrument according to claim 11 , wherein the arms include pin pivots and wherein the paddles collectively form a distal opening, coaxially with the longitudinal axis of the shaft, when the jaw assembly is closed so as to enable the drill or drillpiece to pass through the opening and extend distally from the jaw assembly even when the jaw assembly is closed.

16. The instrument according to claim 15 , wherein inwardly facing projections form the opening.

17. The instrument according to claim 15 , wherein the opening has a noncontinuous border.

18. The instrument according to claim 11 , wherein the paddles are anatomically shaped to conform with contours of a bone at respective areas of engagement for gripping the bone with the jaw.

19. The instrument according claim 11 , wherein inner surfaces of each paddle comprise gripping surfaces which includes a series of studs, serrations or ribs, or a combination thereof.

20. The instrument according to claim 1 , wherein the actuating mechanism includes a plurality of rods.

21. The instrument according to claim 20 , wherein the plurality of rods are driven by one or more levers in the form of a hand- or pistol-grip.

22. The instrument according to claim 20 , wherein proximal ends of the plurality of rods are pivotally connected with a threaded boss and the plurality of rods are drivable by a rotary knob having a mating screw thread that is complementary with that of the threaded boss, and wherein the rotary knob is co-axially aligned with the lumen of the device.

23. The instrument according to claim 22 , wherein the rotary knob is coaxially mounted with the handle.

24. The instrument according to claim 1 , wherein the jaw assembly further comprises a lock to lock the jaw assembly in one of the first, second, and intermediate positions.

25. The instrument according to claim 24 , wherein the lock comprises a ratchet, a locking screw, or screw thread.

26. The instrument according to claim 24 , wherein the lock is self-locking and locks itself when the jaw assembly is closed around an object.

27. The instrument according to claim 1 , wherein the actuating mechanism is driven by one or more levers in the form of a hand- or pistol grip.

28. The instrument according to claim 1 , wherein the rotational axes are parallel to one another and laterally offset relative to the longitudinal axis.

29. A kit comprising:
and a drill or drillpiece; and
a surgical instrument for guiding the drill or drillpiece into bone, the surgical instrument comprising:
an elongate body comprising a shaft having a handle towards its proximal end and a head towards its distal end, the head comprising a mouth and a jaw assembly, the jaw assembly comprising a pair of opposed reciprocating arms;
a lumen aligned with a longitudinal axis of the shaft, extending from a proximal end of the surgical instrument to the mouth of the shaft, wherein the lumen is suitable for receipt and passage of the drill or drillpiece so as to enable the drill or drillpiece to pass through the jaw assembly; and
a plurality of rods aligned with the longitudinal axis of the shaft and positioned within an interior of the shaft, wherein distal ends of the plurality of rods are attached to proximal ends of the arms of the jaw assembly at respective pin-pivots;
wherein the plurality of rods are adapted to move the jaw assembly between a first open position, a second substantially closed position, and intermediate positions therebetween.

30. The kit according to claim 29 , wherein the drill is retractable.

31. The kit according to claim 29 , wherein the drill has distal and proximal ends and is engageable with a powered drive-unit at its proximal end.

32. The kit according to claim 29 , wherein the drill is moveable from a first position, in which a distal end of the drill is located in the shaft, to a second position, in which the distal end of the drill extends from the mouth.

33. The kit according to claim 29 , wherein th

Assignees

• Smith Graham
• Smith & Nephew Inc

Inventors

• Smith Graham

Classifications

• A61B2017/1778

  Human Necessities · mapped topic

• A61B17/1684 Primary

  for the shoulder · CPC title

• A61B17/1778

  for the shoulder · CPC title