Guide pin placement for hip resurfacing

Abstract

An instrument for guide pin placement in a femoral head and neck of a patient, the instrument having a reference pin guide member and a retrograde pin guide member adjustably attached to the reference pin guide member. The reference guide pin member has a bore configured for use in positioning and guiding an external reference pin. The retrograde pin guide member has a plurality of retrograde pin bores for use in positioning and guiding a retrograde reference pin into the femoral neck and head of the patient using a retrograde approach. If an initial retrograde reference pin is not positioned properly, one of the plurality of retrograde pin bores is used to insert another retrograde reference pin in a more desirable position using a retrograde approach.

1 . An instrument for guide pin placement in a femoral head and a femoral neck of a patient comprising:
 a reference pin guide member having a bore configured for use in positioning and guiding an external reference pin,   a retrograde pin guide member for use in positioning and guiding a retrograde reference pin, said retrograde pin guide member having a plurality of retrograde pin bores positioned and configured for use in positioning and guiding a retrograde reference pin into the femoral neck and the femoral head of the patient using a retrograde approach, and   said retrograde pin guide member adjustably attached to said reference pin guide member, said adjustable attachment configured to provide selective adjustment and setting of a position of said external reference pin and said retrograde reference pin relative to one another.   
     
     
         2 . The instrument of  claim 1 , wherein said plurality of pin bores are distributed on said retrograde pin guide member such that said pin bores are spaced apart by a substantially uniform distance from adjacent ones of said pin bores. 
     
     
         3 . The instrument of  claim 1 , wherein said pin bores are fixed in parallel to one another. 
     
     
         4 . The instrument of  claim 1 , wherein said adjustable attachment further comprises an up-down adjustment means. 
     
     
         5 . The instrument of  claim 1 , wherein said adjustable attachment further comprises a rotational adjustment means. 
     
     
         6 . The instrument of  claim 4 , wherein said adjustable attachment further comprises a rotational adjustment means, and wherein said up-down and rotational adjustment means are provided by a rod member slidingly engaged in a sleeve member, and a selective locking means for selectively locking said rod member in a set relative to said sleeve member. 
     
     
         7 . The instrument of  claim 6 , wherein said sleeve member depends downward from said reference guide pin member and said rod member extends upward from said retrograde guide pin member. 
     
     
         8 . The instrument of  claim 4 , wherein said adjustable attachment further comprises a flexion-extension adjustment means, said flexion-extension adjustment means positioned between said retrograde guide pin member and said rod member to thereby allow selection of a flexion-extension orientation of said retrograde pin guide member. 
     
     
         9 . The instrument of  claim 8 , wherein said flexion-extension means is a universal joint. 
     
     
         10 . The instrument of  claim 8 , further comprising a flexion-extension locking means for selectively locking said retrograde pin guide member in a selected position relative to said instrument. 
     
     
         11 - 20 . (canceled)