Integrated surgical reduction clamp and drill guide

• US 5,725,532 A
• Filed: 09/10/1996
• Issued: 03/10/1998
• Est. Priority Date: 09/10/1996
• Status: Expired due to Term

• Current Assignee: Shoemaker, Steven
• Original Assignee: Shoemaker, Steven
• Inventors: Shoemaker, Steven
• Primary Examiner(s): Buiz, Michael
• Assistant Examiner(s): REIP, DAVID OWEN
• Application Number:
  US08/711,274
• Time in Patent Office: 546 Days
• Field of Search: 606/96, 606/104, 606/205, 606/206, 606/207, 606/174
• US Class Current: 623/1.11
• CPC Class Codes: A61B 17/1775 for the foot or ankle
• CPC Class Codes: A61B 17/8866 for gripping or pushing bones, e.g. approximators joint distractors A61B17/025

Abstract

A non-opposed surgical reduction clamp 10 is provided which has a drill guide 40 integrally formed with a guide leg 20 of the reduction clamp 10. The reduction clamp 10 also includes a reference leg 50 pivotably connected to the guide leg 20 through a pivot 70. The reference leg 50 includes a sharpened tip 57 at a tip thereof which can penetrate into a surface of a bone somewhat to prevent slippage of the reference leg 50. The drill guide 40 has an inner cylindrical surface 44 to provide an alignment axis Z for location of bone fixation structures, such as K-wire, pins or screws for reattachment and fixation of fractured bone fragments. Alignment axis Z of the drill guide 40 is in a common plane with the sharpened tip 57 of the reference leg 50, but extends beyond the sharpened tip 57 of the reference leg 50. Ends of the reference leg 50 and guide leg 20 opposite the sharpened tip 57 and drill guide 40 are provided with handle loops 30, 60 and clamp tabs 32, 62 to allow the reduction clamp 10 to be easily manipulated by a surgeon and clamped into position. The reduction clamp 10 is particularly configured to provide for reattachment of a lower tip H of a tibia T and to reattach a lower end E of a fibula F within the ankle A of a human patient. Precise orientation of the bone fixation structures such as wire K is provided without requiring a fully opposed reduction clamp.

Claims

1. An integrated surgical reduction clamp and drill guide for simultaneously supporting adjacent fragments of a fractured bone together and aligning the placement of a fractured bone fixation structure, comprising:

a reference leg having a tip;

a guide leg having a guide means to guide the orientation of a fractured bone fixation structure along an alignment axis to a desired location passing through the fragments of the bone on opposite sides of the fracture and through the fracture, wherein said guide means includes a hollow cylinder attached to an end of said guide leg, said hollow cylinder having a central axis collinear with said alignment axis and having an inner cylindrical surface with a diameter not less than a diameter of the bone fixation structure, such that said bone fixation structure can pass through said hollow cylinder;

a pivot interposed between said reference leg and said guide leg, said pivot including means to resist translation between said reference leg and said guide leg and means to allow rotation between said reference leg and said guide leg;

said reference leg having a length from said pivot to said tip which is shorter than a length of said guide leg from said pivot to said guide means, such that the guide means and said tip of said reference leg are not fully opposing.

2. The reduction clamp and drill guide of claim 1 wherein said guide means is linearly aligned with the desired location along said alignment axis which extends past a location of said tip, said line oriented in a common plane with said reference leg and said tip, said tip remaining spaced from said alignment axis.

3. The reduction clamp and drill guide of claim 1 wherein a hand grasping means is provided on said reference leg and on said guide leg, each said grasping means oriented on the same side of said pivot and on a side of said reference leg opposite said tip and on a side of said guide leg opposite said guiding means.

4. The reduction clamp and drill guide of claim 3 wherein said tip of said reference leg is sharpened to a point having sufficient sharpness to penetrate a surface of a bone fragment somewhat when linear force is applied to said tip from said reference leg, and

wherein said hollow cylinder of said guide means includes an inlet end and an outlet end, said outlet end oriented closer to said tip of said reference leg than said inlet end, said outlet end having a sharpened rim exhibiting sufficient sharpness to allow said sharpened rim to penetrate a surface of a bone fragment somewhat when force is applied to said outlet end of said guide means through said guide leg.

5. The reduction clamp and drill guide of claim 4 wherein said reference leg and said guide leg include means to clamp to each other in a manner restricting rotation between said reference leg and said guide leg, and maintaining compressive force between said tip of said reference leg and said outlet end of said guide means of said guide leg, such that said tip and said outlet end of said guide means can act as a clamp holding adjacent pieces of bone fragments to be rejoined in positions adjacent each other.

6. The reduction clamp and drill guide of claim 5 wherein said alignment axis along which said guide means is linearly aligned diverges from an imaginary line extending from said guide means to said tip of said reference leg by a divergence angle between fifteen degrees and forty-five degrees, such that said reduction clamp and drill guide can orient a bone fixation structure in the correct position to be useful in ankle surgery for humans where fractured portions of a lower end of a tibia or a lower end of a fibula are to be reattached.

7. A non-opposing surgical reduction clamp and drill guide for supporting fractured bone fragments during orthopedic bone repair surgery, comprising:

a reference leg having a tip;

a guide leg having a means to linearly guide the orientation of a drill-driven fractured bone fixation device to a desired location oriented along an alignment axis of said guide means, wherein said guide means includes a hollow cylinder fixed to an end of said guide leg, said hollow cylinder having a bore extending from an inlet end to an outlet end, said outlet end oriented closer to said tip of said reference leg than said inlet end;

a means to couple said reference leg and said guide leg together in a manner allowing a pivoting movement of the guide leg and reference leg relative to each other about a pivot point;

said alignment axis oriented in a plane including said tip of said reference leg, but diverging from the location of said tip such that a linear distance from said pivot point to said alignment axis is greater than a linear distance from said pivot point to said tip of said reference leg.

8. The clamp of claim 7 wherein said tip of said reference leg is sharpened a sufficient amount to allow said tip to penetrate into a surface of a bone when said tip is oriented adjacent the bone and force is applied from said reference leg to said tip.

9. The clamp of claim 8 wherein said guide leg includes a means to grasp the guide leg with a hand on a side of said coupling means opposite said guide means,

wherein said reference leg includes a hand grasping means on a side of said reference leg opposite said sharpened tip, and

wherein said clamp includes a means to clamp said reference leg into fixed position with respect to said guide leg in a manner preventing rotation and translation between said reference leg and said guide leg.

10. The clamp of claim 9 wherein said alignment axis of said guide means diverges from a line extending from said linearly guiding means to said tip of said reference leg by a divergence angle measuring between fifteen degrees and forty-five degrees.

11. The clamp of claim 10 wherein said divergence angle has a measurement between twenty degrees and forty degrees when a jaw angle at which said reference leg diverges from said guide leg has a measurement of thirty degrees.

12. The clamp of claim 7 wherein said outlet end of said hollow cylinder includes a sharpened rim, said sharpened rim having sufficient sharpness to penetrate into a surface of a bone when force is applied to said sharpened rim from said guide leg.

13. A method for repairing a bone fracture where the fracture is non-parallel with many adjacent surfaces of the bone, such that an opposing reduction clamp cannot be used to hold fragments of the bone adjacent the fracture together, including the steps of:

identifying first and second fragments of a bone which have been fractured apart and are to be rejoined together, at least one of the fragments not having a nearby surface parallel to the fracture against which an opposing reduction clamp can be used to close the fragments into contact with each other;

providing a non-opposing surgical reduction clamp and drill guide including;

a reference leg having a tip;

a guide leg having a guide means to guide the orientation of a fixation device along an alignment axis to a desired location passing through fragments of the bone on opposite sides of a fracture and through the fracture;

a pivot interposed between the reference leg and the guide leg, the pivot including means to resist translation between the reference leg and the guide leg and means to allow rotation between the reference leg and the guide leg;

the reference leg having a length from the pivot to the tip which is shorter than a length needed to extend the tip to a region intersecting the alignment axis, such that the guide means and the tip of the reference leg are not fully opposing;

placing the tip of the reference leg against a surface of the first bone fragment with the tip penetrating the surface;

positioning the guide means against a surface of the second bone fragment;

rotating the reference leg and guide leg about the pivot until the first bone fragment and the second bone fragment are adjacent each other;

orienting the bone reattachment structure adjacent the guide means; and

inserting the bone fixation device through the second bone fragment, across the fracture and into the first bone fragment while aligned by the guide means.

14. The method of claim 13 wherein said bone fixation device utilized in said orienting step is a pin which is configured to be self-tapping within bone structures.

15. The method of claim 13 wherein a drilling step is provided before said orienting step, said drilling step including the steps of locating a drill bit within the guide means, inserting the drill bit into the second bone fragment, across the fracture and into the first bone fragment while the drill bit is rotating, and removing the drill bit from the first bone fragment and the second bone fragment.

16. The method of claim 15 wherein said bone reattachment structure of said orienting step is a pin having sufficient length to extend through said second bone fragment, across the fracture and into the first bone fragment.

17. The method of claim 16 wherein said providing step includes the step of forming the guide means as a hollow cylinder having a bore of constant circular cross-section extending from an inlet end to an outlet end, the cylinder aligned with the alignment axis which extends past a location of the tip of the reference leg and in the same plane as the tip of the reference leg.

18. The method of claim 17 wherein said providing step further includes the steps of providing the tip of the reference leg with sufficient sharpness to penetrate the surface of a bone somewhat, wherein the outlet end of the hollow cylinder of the guide means includes a sharpened rim having sufficient sharpness to penetrate the surface of a bone somewhat,

providing both the reference leg and the guide leg with hand grasping means through which a user can adjust the relative positions of the reference leg and the guide leg,

providing a means to clamp the reference leg and the guide leg into fixed position relative to each other while resisting displacement or rotation there between, and

providing a divergence angle between the alignment axis along which the hollow cylinder extends and an imaginary line extending from the drill guide to the tip of the reference leg having an angle measuring between fifteen degrees and forty-five degrees.