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Distal femoral rotary positioner

A locator, femoral technology, applied in medical science, prosthesis, knee joint, etc., can solve the problems of incompetent femoral prosthesis rotation positioning instrument device, affecting the patient satisfaction of surgical results, poor patellofemoral trajectory, etc., to avoid subjective Deviation, simple structure, intuitive effect of indication

Active Publication Date: 2017-09-22
上海龙慧医疗科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, judging the correct position of the femoral prosthesis in clinical operations mainly depends on the experience of the operator and some bony anatomical landmarks. This has the disadvantages of inaccurate positioning, easy internal rotation or external rotation of the prosthesis, poor patellofemoral track, and anterior knee joints. Risk of complications such as pain, affecting surgical effect and patient satisfaction
At present, there is no instrument device that can assist the surgeon in the rotational positioning of the femoral prosthesis during the operation

Method used

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  • Distal femoral rotary positioner

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Embodiment 1

[0055] refer to Figure 1-3 As shown, the present embodiment proposes a distal femur rotary positioner, which is made of metal or alloy with a certain mechanical strength, and is composed of an epicondyle positioning plate 10, an Insall cross bar 20, a pointer rod 30, and a Whiteside indicator needle. 40. The posterior condyle crossbar 50 and the posterior condyle supporting plate 60 are composed of a support rod 70 and a locking screw 80 to connect and fix it into a frame structure. Figure 1-3 Among them, C represents the inner and outer sides of the distal femur. After positioning the above-mentioned structures according to their correct bony anatomical landmarks, they are connected and fixed into a metal frame structure with locking screws 80, which is used to accurately assist the osteotomy of the distal femur. rotation positioning.

[0056] Among them, such as Figure 4 As shown, the epicondyle positioning plate 10 includes a head end 11, a tail end 12, and a cross bar...

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Abstract

The invention provides a distal femoral rotary positioner. The positioner is of a frame-type metal structure and comprises two epicondyle positioning discs used for positioning and respectively fixed to the inner epicondyle and the outer epicondyle of the femur, one Insall cross rod for indicating an Insall line, one pointer rod, one Whiteside indicating needle for observing the trochlear groove and fossa intercondyloidea, one posterior condyle cross rod for positioning and indicating a posterior condyle line, two posterior condyle supporting plates for positioning the space position of the posterior condyle, two supporting rods connected with the Insall cross rod, the pointer rod and the posterior condyle cross rod, and two locking screws for positioning and locking the epicondyle positioning discs on the Insall cross rod. After the structures are positioned according to respective correct osseous anatomy markers, the structures are connected and fixed to form one metal frame structure by using locking screws, and the structure is used for accurately assisting rotary positioning after distal femoral osteotomy. The distal femoral rotary positioner is simple in structure, quick and convenient to operate, visual in indication and small in occupied space, facilitates minimally invasive operation and can accurately assist rotary positioning after distal femoral osteotomy.

Description

technical field [0001] The invention belongs to the technical field of rotational positioning of a prosthesis on the osteotomy surface of the distal femur in knee joint surgery, and in particular relates to a rotational positioner for the distal femur. Background technique [0002] Artificial total knee replacement is currently the best way to treat end-stage knee diseases, such as osteoarthritis, rheumatoid arthritis and other diseases, and the correct placement of the femoral prosthesis is one of the key factors to ensure the surgical effect . At present, judging the correct position of the femoral prosthesis in clinical operations mainly depends on the experience of the operator and some bony anatomical landmarks. This has the disadvantages of inaccurate positioning, easy internal rotation or external rotation of the prosthesis, poor patellofemoral track, and anterior knee joints. The risk of complications such as pain will affect the surgical effect and patient satisfac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/46
CPCA61F2/461A61F2002/4627
Inventor 张海宁张洁冷萍
Owner 上海龙慧医疗科技有限公司
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