Instruments and method for minimally invasive surgery for total hips
First Claim
1. In an instrument system for preparing a proximal femur for total hip replacement, the improvement comprising an intermedullary femoral broach, including:
- a) an elongated body having a proximal portion, a distal portion, and a buttress between said portions;
b) said proximal portion having smooth outer walls and a proximal end, said smooth outer walls having a substantially constant cross-sectional configuration proximal of said buttress such that an instrument may be slid along said proximal portion from said proximal end toward said buttress;
c) said distal portion having a sharp pointed distal end and peripheral walls including a plurality of linear longitudinally extending parallel cutting edges; and
d) a femoral neck resector guide, comprising;
i) a body having an opening therethrough permitting said body to slide over said outer walls of said proximal portion of said broach; and
ii) a ring extending laterally of said body;
iii) said ring sized to sit on top of a femoral head of a femur when said distal portion of said broach is placed within an intermedullary canal of said femur.
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Accused Products
Abstract
An intramedullary femoral broach aligns two instruments. A femoral neck resector guide slides over the broach and centers on the patient'"'"'s femoral head to determine the height and angular rotation of resection. A circular ring of the head and cutting arms assure the system will fit any femur. A template is applied to the femoral broach and seats itself against the buttress of the broach locking it into place. The broach is then reinserted into the intramedullary canal. When the template reaches the greater trochanter the sizer is adjusted to the rotational anteversion of the canal. The handle of the femoral broach is struck with a mallet until the template is imbedded into the proximal femoral neck intramedullary bone. A retractor facilitates reaming of the acetabulum through a small anterior incision. A proximal portion digs into the bone of the superior acetabulum to allow for retraction of soft tissues.
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Citations
22 Claims
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1. In an instrument system for preparing a proximal femur for total hip replacement, the improvement comprising an intermedullary femoral broach, including:
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a) an elongated body having a proximal portion, a distal portion, and a buttress between said portions; b) said proximal portion having smooth outer walls and a proximal end, said smooth outer walls having a substantially constant cross-sectional configuration proximal of said buttress such that an instrument may be slid along said proximal portion from said proximal end toward said buttress; c) said distal portion having a sharp pointed distal end and peripheral walls including a plurality of linear longitudinally extending parallel cutting edges; and d) a femoral neck resector guide, comprising; i) a body having an opening therethrough permitting said body to slide over said outer walls of said proximal portion of said broach; and ii) a ring extending laterally of said body; iii) said ring sized to sit on top of a femoral head of a femur when said distal portion of said broach is placed within an intermedullary canal of said femur. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. In an instrument system for preparing a proximal femur for total hip replacement, the improvement comprising an intermedullary femoral broach, including:
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a) an elongated body having a proximal portion, a distal portion, and a buttress between said portions; b) said proximal portion having smooth outer walls and a proximal end; c) said distal portion having a sharp pointed distal end and peripheral walls including longitudinally extending cutting edges; and d) a femoral neck resector guide, comprising; i) a body having an opening therethrough permitting said body to slide over said outer walls of said proximal portion of said broach; and ii) a ring extending laterally of said body; iii) said ring sized to sit on top of a femoral head of a femur when said distal portion of said broach is placed within an intermedullary canal of said femur; and iv) said ring being connected to said body with an extension rod permitting said ring to self center on said femoral head.
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Specification