Fixation alignment guide for surgical use

• US 5,312,412 A
• Filed: 02/03/1993
• Issued: 05/17/1994
• Est. Priority Date: 02/03/1993
• Status: Expired due to Term

• Current Assignee: Zimmer Technology Incorporated (Zimmer Biomet Holdings, Inc.)
• Original Assignee: Terry L. Whipple
• Inventors: Whipple, Terry L.
• Primary Examiner(s): Graysay, Tamara L.
• Application Number:
  US08/012,994
• Time in Patent Office: 468 Days
• Field of Search: 606/57, 606/87, 606/96, 606/102, 606/103, 606/104, 606/105
• US Class Current: 606/96
• CPC Class Codes: A61B 17/1782 for the hand or wrist
• CPC Class Codes: A61B 17/8866 for gripping or pushing bones, e.g. approximators joint distractors A61B17/025

Abstract

An improved device for inserting rigid shafts into opposed segments of a fractured bone including a axially movable shaft having an arm extending outwardly therefrom which is adapted to engage a fractured bone at a first surface location. A tubular guide through which the rigid shaft is inserted is provided which is operatively aligned with the bone engagement arm and includes jaws opposing the bone engagement arm for engaging the fractured bone at a second surface location. The tubular guide is secured to one end of an elongate guide support and the axially movable shaft is adjustably positioned parallel thereto in an aperture extending through the elongate guide support. A securement mechanism is operatively associated with the guide support for securing the axially movable shaft at a desired distance from the jaws of the tubular guide to fixedly engage the fractured bone therebetween.

Claims

1. A device for inserting rigid shafts into opposed segments of a fractured bone the device comprising:

an axially movable shaft having an arm extending outwardly therefrom said arm being adapted to engage a fractured bone at a first surface location;

a tubular guide operatively aligned with said bone engagement arm and having a proximal end and a distal end wherein said proximal end comprises means for engaging the fractured bone at a second surface location substantially opposite said first bone surface location;

an elongated guide support for engaging said tubular guide between the proximal and distal ends of said tubular guide and defining an aperture therethrough for adjustably receiving said axially movable shaft therein; and

securement means operatively associated with said guide support for securing said axially movable shaft at a desired distance from said engagement means of said tubular guide in order to fixedly engage the fractured bone therebetween;

whereby rigid shafts may be inserted through said tubular guide and implanted into opposed segments of the fractured bone, and

wherein said elongate guide support includes one or more apertures therethrough located adjacent and parallel to said tubular guide, said apertures defining a smaller diameter passageway than said tubular guide and allowing for selective insertion of guide wires into the fractured bone.

2. A device for inserting rigid shafts into opposed segments of a fractured bone the device comprising:

an axially movable shaft having an arm extending outwardly therefrom, said are being adapted to engage a fractured bone at a first surface location;

a tubular guide operatively aligned with said bone engagement arm and having a proximal end and a distal end wherein said proximal end comprises means for engaging the fractured bone at a second surface location substantially opposite said first bone surface location;

an elongate guide support for engaging said tubular guide between the proximal and distal ends of said tubular guide and defining an aperture therethrough for adjustably receiving said axially movable shaft therein; and

securement means operatively associated with said guide support for securing said axially movable shaft at a desired distance from said engagement means of said tubular guide in order to fixedly engage the fractured bone therebetween;

whereby rigid shafts may be inserted through said tubular guide and implanted into opposed segments of the fractured bond, and

wherein said securement means comprises;

a. ratchet teeth provided along at least a portion of the length of said axially movable shaft;

b. a ratchet pin carried by said elongate guide support and said ratchet pin to cooperatively engage said ratchet teeth of said axially movable shaft so as to allow said shaft to be slidably movable relative thereto in one direction and to lockingly engage said shaft so as to prevent slidable movement of said shaft in the other direction;

c. a sleeve rotatably mounted to said elongate guide support in spaced apart relationship to said axially movable shaft; and

d. connector means operatively connecting said sleeve to said ratchet pin and adapted to withdraw said ratchet pin from cooperative engagement with said ratchet teeth of said axially movable shaft when said sleeve is rotatably actuated and thereby release said axially movable shaft for slidable movement in said one direction and said other direction.

3. A device for inserting rigid shafts into opposed segments of a fractured bone the device comprising:

an axially movable shaft having an arm extending outwardly therefrom, said arm being adapted to engage a fractured bone at a first surface location;

a tubular guide operatively aligned with said bone engagement arm and having a proximal end and a distal end wherein said proximal end comprises means for engaging the fractured bone at a second surface location substantially opposite said first bone surface location;

an elongate guide support for engaging said tubular guide between the proximal and distal ends of said tubular guide and defining an aperture therethrough for adjustably receiving said axially movable shaft therein; and

securement means operatively associated with said guide support for securing said axially movable shaft at a desired distance from said engagement means of said tubular guide in order to fixedly engage the fractured bone therebetween;

whereby rigid shafts may be inserted through said tubular guide and implanted into opposed segments of the fractured bone, and

wherein a bushing defining an aperture therethrough is provided which is inserted into said tubular guide to provide a reduced diameter passageway through said tubular guide for insertion of a guide wire into the fractured bone.

4. A device for inserting rigid shafts into opposed segments of a fractured bone, the device comprising;

an axially movable shaft having an arm extending outwardly therefrom, said arm being adapted to engage a fractured bone at a first surface location and said arm having a base;

a tubular guide operatively aligned with said bone engagement arm and having a proximal end and a distal end wherein said proximal end comprises jaw means for engaging the fractured bone at a second surface location substantially opposite said first bone surface location;

an elongate guide support for engaging said tubular guide between the proximal and distal ends of said tubular guide and defining an aperture therethrough for slidably receiving said axially movable shaft therein; and

securement means operatively associated with said guide support for securing said axially movable shaft at a desired distance from said jaw means of said tubular guide in order to fixedly engage the fractured bone therebetween, said securement means comprising;

(1) ratchet teeth provided along at least a portion of the length of said axially movable shaft;

(2) a ratchet pin carried by said elongate guide support and said ratchet pin to cooperatively engage said ratchet teeth of said axially movable shaft so as to allow said shaft to be slidably movable relative thereto in one direction and to lockingly engage said shaft so as to prevent slidable movement of said shaft in the other direction;

(3) a sleeve rotatably mounted to said elongate guide support in spaced apart relationship to said axially movable shaft; and

(4) connector means operatively connecting said sleeve to said ratchet pin and adapted to withdraw said ratchet pin from cooperative engagement with said ratchet teeth of said axially movable shaft when said sleeve is rotatably actuated and thereby release said axially movable shaft for slidable movement in said one direction and said other direction;

whereby rigid shafts may be inserted through said tubular guide and implanted into opposed segments of the fractured bone.

5. A device according to claim 4 wherein said arm of said axially movable shaft includes a pin element for engagement of the bone depending downwardly from the free end thereof and substantially axially aligned with said tubular guide.

6. A device according to claim 4 wherein said axially movable shaft includes measuring means for indicating the distance between said first bone surface location engaged by said arm thereof and said second bone surface engaged by said jaw means of said tubular guide.

7. A device according to claim 6 wherein said measuring means is a scale inscribed on said axially movable shaft.

8. A device according to claim 4 wherein said axially movable shaft includes an arcuate finger receiving portion at the base of said arm to facilitate slidably urging said shaft towards said elongate guide support.

9. A device according to claim 4 wherein said axially movable shaft extends substantially pendicularly in relationship to said elongate guide support and substantially parallel to said tubular guide.

10. A device according to claim 4 wherein said jaw means of said tubular guide comprises a plurality of tines extending generally outwardly from said proximal end of said tubular guide and parallel to a longitudinal axis thereof.

11. A device according to claim 4 wherein said elongate guide support fixedly engages said tubular guide adjacent one end thereof, slidably receives said axially movable shaft substantially in the medial portion thereof, and carries said securement means between the other end thereof and said axially movable shaft.

13. A device according to claim 4 wherein a bushing defining an aperture therethrough is provided which is inserted into said tubular guide to provide a reduced diameter passageway through said tubular guide for insertion of a guide wire into the fractured bone.

12. A device according to claim 12 wherein said elongate guide support includes one or more apertures therethrough located adjacent and parallel to said tubular guide, said apertures defining a smaller diameter passageway than said tubular guide and allowing for selective insertion of guide wires into the fractured bone.