Surgical tool guide and entry hole positioner

• US 5,624,447 A
• Filed: 03/20/1995
• Issued: 04/29/1997
• Est. Priority Date: 03/20/1995
• Status: Expired due to Term

• Current Assignee: Symmetry Medical Inc
• Original Assignee: OTHY Incorporated (Symmetry Medical Inc)
• Inventors: Myers, Reese K.
• Primary Examiner(s): Buiz, Michael Powell
• Assistant Examiner(s): LEONARDO, MARK
• Application Number:
  US08/407,216
• Time in Patent Office: 771 Days
• Field of Search: 606/86, 606/96, 606/97, 606/98, 606/103, 606/104, 606/191
• US Class Current: 606/96
• CPC Class Codes: A61B 17/1717 for applying intramedullary nails or pins
• CPC Class Codes: A61B 17/1778 for the shoulder

Abstract

In the broader aspects of the invention, there is provided an improved surgical tool guide and entry hole positioner comprising at least one cannulated sleeve with a handle and soft tissue protector secured to the sleeve. The cannulated sleeve has an inner surface which serves as a guide surface for a surgical tool and an obturator at one end thereof which fits in the cannulated sleeve. An improved method for locating the starting hole and accessing the intramedullary canal of bones such as the femur, the tibia, and the humerus is also provided including the steps of exposing the end of the intramedullary canal, positioning the tip of the sleeved guide with obturator in close proximity to the end of the canal, removing the obturator so that the cannulated sleeve remains in position, placing a guide pin through the sleeve and into the bone for radiographic evaluation of the guide pin placement, positioning a cannulated surgical tool over the guide pin, and using a cannulated drill for creating the entry hole into the bone for access to the intramedullary canal with a reamer, and introducing reamers and other surgical tools, guided by the inner surface of the sleeve into the intramedullary canal to increase the inner diameter of the canal until it is of a suitable diameter to receive a fracture fixation device, all the while retracting and protecting muscle, skin, and other soft tissue from damage.

Claims

1. A surgical tool guide and entry hole positioner comprising an outer sleeve having a distal end and a proximal end and a longitudinal axis, a soft tissue shield extending proximally and axially from the proximal end of said outer sleeve, a handle secured to said outer sleeve, said outer sleeve having an interior passage extending therethrough and interior guide surfaces for insertion of a surgical tool, the size of said surgical tool being limited by the diameter of said interior passage of said outer sleeve, said surgical tool being inserted into the proximal end of said outer sleeve with the distal end of said outer sleeve being directed toward an intramedullary canal of a bone so as to accurately form an entry hole from an external surface of the bone to the intramedullary canal of the bone coaxial with the longitudinal anatomical axis of said bone, a plurality of removably nested sleeves, each of said nested sleeves having a distal end and an enlarged proximal end, each of said nested sleeves having an interior passage, each of which nested sleeves may also guide a surgical tool so as to accurately form an entry hole from the external surface of a bone to an intramedullary canal of said bone coaxial with the longitudinal anatomical axis of said bone.

2. The surgical tool guide of claim 1 wherein said sleeve has a longitudinally extending axis.

3. The surgical tool guide and entry hole positioner of claim 1 wherein said outer sleeve and said nested sleeves are generally tubular.

4. The surgical tool guide and entry hole positioner of claim 1 wherein said handle extends from said outer sleeve generally perpendicular to the longitudinal axis of said outer sleeve.

5. The surgical tool guide and entry hold positioner of claim 1 wherein said tissue shield has a proximal end and a distal end, said distal end of said tissue shield being attached to said proximal end of semi-tubular extension of said outer sleeve.

6. The surgical tool guide and entry hole positioner of claim 1 wherein said tissue shield has a radiused curvature such that said radius increases from said distal end to said proximal end, said radius of said distal end being larger than the outer diameter of the nested sleeve of greatest outer diameter.

7. The surgical tool guide and entry hole positioner of claim 1 wherein said largest of said nested sleeves is secured in said outer sleeve by a clamping mechanism extending through the longitudinal axis of said handle, said clamping mechanism being removably positioned on said nested sleeve of largest diameter.

8. The surgical tool guide and entry hold positioner of claim 1 further comprising a plurality of said nested sleeves, each of said sleeves having an enlarged proximal end and a distal end which is generally frusto conical in shape, with the largest of said nested sleeves having an inner passage of diameter greater than the outer diameter of a second sleeve, with said second sleeve being greater in length than the said largest sleeve such that when nested completely in said largest sleeve their distal ends are coplanar, with said second sleeve having an inner passage of diameter greater than the outer diameter of a third sleeve, with said third sleeve being greater in length than said second sleeve such that when nested completely in said second sleeve their distal ends are coplanar, with said third sleeve having an interior passage.

9. The surgical tool guide of claim 1 wherein said surgical tools are cannulated.

10. The surgical tool guide of claim 1 wherein said nested sleeves have coincident curved axes.

11. The surgical tool guide of claim 8 wherein there are tow sleeves of said plurality.

12. The surgical tool guide and entry hole positioner of claim 8 further comprising an obturator with an enlarged proximal end and a distal end, said obturator having a conical distal end coming to a sharp point, said obturator having a diameter smaller than the diameter of the interior passage of said second sleeve, said obturator being greater in length than said second sleeve such that when nested completely in said second sleeve said conical portion of said obturator protrudes beyond the distal end of said second sleeve.

13. The surgical tool guide of claim 8 further comprising surgical tools for use with said nested sleeves, one such tool being a reaming tool with a proximal end and a distal end, said reaming tool being longer than said third sleeve, said reaming tool having an interior passage of the same diameter as the interior passage of said third sleeve, said reaming tool having an outer diameter less than the diameter of said interior passage of said second sleeve.

14. The surgical tool guide of claim 8 further comprising surgical tools for use with said nested sleeves, one such tool being a pin with a proximal end and a distal end having a sharp cutting tip, said pin being longer than said third sleeve, said pin having a diameter less than the diameter of the interior passage of said reaming tool.

15. The surgical tool guide of claim 8 wherein each of said nested sleeves have an enlarged proximal end, said ends being stacked when said sleeves are nested.

16. The surgical tool guide of claim 8 wherein each of said nested sleeves has a longitudinal axis, said axes being coincident when said sleeves are nested.

17. The surgical tool guide of claim 15 wherein said surgical tools are chosen from the group consisting of reamers, broaches and drills.