CN217338998U

CN217338998U - Joint line positioning instrument suitable for knee joint revision surgery

Info

Publication number: CN217338998U
Application number: CN202120918357.3U
Authority: CN
Inventors: 毛兴佳; 高振中; 向川
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-04-29
Filing date: 2021-04-29
Publication date: 2022-09-02
Anticipated expiration: 2031-04-29

Abstract

The utility model discloses a joint line positioning apparatus suitable for knee joint revision surgery, which comprises a first ruler plate, a second ruler plate, a main handle, a connecting rod, a main slider, an auxiliary slider and a sliding rod, wherein the first ruler plate and one end of the second ruler plate are arranged at an included angle and connected with the main handle, the main handle is vertically arranged with the end surfaces of the first ruler plate and the second ruler plate, the main slider and the auxiliary slider are respectively arranged on the corresponding first ruler plate and the second ruler plate in a sliding way, the sliding rod is fixedly arranged on the main slider in a penetrating way and is arranged on the auxiliary slider in a penetrating way, the sliding rod is vertically arranged with the first ruler plate, the connecting rod is fixedly connected with the main slider and is arranged in parallel with the main handle, the apparatus is suitable for joint line positioning in knee joint revision surgery, the vertical distance from an adductor node to a joint line can be quickly obtained, and the method for positioning the joint line is more efficient, the measurement and calculation processes are omitted.

Description

Joint line positioning instrument suitable for knee joint revision surgery

Technical Field

The utility model relates to a medical equipment, concretely relates to joint line positioning device suitable for in knee joint revision art.

Background

The original position of the joint line is recovered, and the obtained good knee joint biomechanical balance is closely related to the good knee joint function after the artificial total knee joint replacement revision. Because the normal anatomical structure of the knee joint is destroyed and more bone mass is lost due to the influence of the initial artificial total knee replacement, in the total knee replacement revision surgery, it is difficult for the operating physician to accurately position the joint line. And because of a large amount of losses of distal femur bone mass caused by infection, prosthesis looseness and other reasons, the operation of an operator is more inclined to select a prosthesis with a small model, so that the postoperative knee joint line moves towards the near end, the postoperative mechanics of the patellofemoral joint and the tibiofemoral joint are directly changed, and great negative effects are generated on postoperative effects. At present, one of the internationally accepted modes is that the ratio of the vertical distance from an adductor nodule to a joint line to the width of the medial and lateral femoral condyles is a fixed value according to the characteristics of people, for example, the ratio of asian race is generally 0.553 according to clinical experience, and based on the principle, the technical personnel in the field are expected to design a joint line positioning instrument convenient for knee joint revision surgery for improving the efficiency and treatment effect of clinical surgery according to the inherent characteristics of human bodies.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects existing in the prior art, and provides a joint line positioning instrument which has reasonable structural design and is suitable for knee joint revision surgery.

The utility model provides a technical scheme that above-mentioned problem adopted is: the utility model provides a joint line location apparatus suitable for in knee joint revision art, includes first chi board, second chi board, main handle, connecting rod, main slider, vice slider and slide bar, first chi board be the contained angle setting with the one end of second chi board and be connected with the main handle, the main handle is perpendicular setting with first chi board and second chi board terminal surface, main slider and vice slider slide respectively and set up on corresponding first chi board and second chi board, the slide bar wear to establish to fix on main slider and wear to establish and slide and set up on vice slider, slide bar and first chi board be perpendicular setting, the connecting rod be connected fixedly and be parallel arrangement with the main handle with main slider.

Further: the main sliding block is provided with a first fastening bolt for limiting the sliding of the main sliding block on the first ruler plate, and the auxiliary sliding block is provided with a second fastening bolt for limiting the sliding of the sliding rod.

Further: the first ruler plate is marked with a first scale mark, the first scale mark marks the vertical distance between the main handle and the main sliding block, the sliding rod is marked with a second scale mark, and the second scale mark marks the vertical distance between the main sliding block and the auxiliary sliding block.

Further: the sliding rod and the second ruler plate form an angle of 61.1 degrees.

Further: the sliding rod is a cylindrical rod piece.

Further: the first ruler plate and the second ruler plate are integrated.

Compared with the prior art, the utility model, have following advantage and effect: the device is suitable for positioning the joint line in the knee joint revision surgery, the vertical distance from the adductor nodule to the joint line can be quickly obtained, the method for positioning the joint line is more efficient, and the measuring and calculating processes are omitted; and measuring errors caused by scale abrasion, insufficient measuring precision and the like can be avoided, and calculation result deviation caused by the reasons can be avoided.

Drawings

Fig. 1 is a schematic structural view of a joint line positioning instrument according to an embodiment of the present invention.

Fig. 2 is a schematic view of the measured position of a joint line positioning instrument according to an embodiment of the present invention.

The reference numbers: the measuring tool comprises a first measuring tool plate 1, a second measuring tool plate 2, a main handle 3, a connecting rod 4, a main sliding block 5, an auxiliary sliding block 6, a sliding rod 7, a first fastening bolt 8, a second fastening bolt 9, a first scale mark 10 and a second scale mark 11.

Detailed Description

The present invention will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not intended to limit the present invention.

Example 1:

referring to fig. 1-2, the present embodiment of a joint line positioning device suitable for knee joint revision surgery includes a first ruler plate 1, a second ruler plate 2, a main handle 3, a connecting rod 4, a main slider 5, an auxiliary slider 6, and a sliding rod 7, wherein one end of the first ruler plate 1 and one end of the second ruler plate 2 are disposed at an included angle and connected to the main handle 3, the main handle 3 is disposed perpendicular to the end surfaces of the first ruler plate 1 and the second ruler plate 2, the main slider 5 and the auxiliary slider 6 are respectively slidably disposed on the corresponding first ruler plate 1 and the second ruler plate 2, the sliding rod is fixedly disposed on the main slider 5 in a penetrating manner and slidably disposed on the auxiliary slider 6, the sliding rod 7 is disposed perpendicular to the first ruler plate 1, the connecting rod 4 is fixedly connected to the main slider 5 and is disposed parallel to the main handle 3, the main slider 5 is provided with a first 8 fastening bolt 8 for limiting the sliding on the first ruler plate 1, the auxiliary sliding block 6 is provided with a second fastening bolt 9 for limiting the sliding of the sliding rod 7, the first ruler plate 1 is marked with a first scale mark 10, the first scale mark 10 marks the vertical distance between the main handle 3 and the main sliding block 5, the sliding rod 7 is marked with a second scale mark 11, the second scale mark 11 marks the vertical distance between the main sliding block 5 and the auxiliary sliding block 6, and the sliding rod 7 is a cylindrical rod piece.

The specific application method of the joint line positioning instrument suitable for the knee joint revision surgery in the embodiment comprises the following steps:

(1) sliding the main slider 5 and the slider 6, respectively clamping the main stem 3 and the main connecting rod 4' on the lateral condyle (contact position B in fig. 2) and the most prominent point of the medial condyle (contact position C in fig. 2), and fixing the main slider 5 and the sliding rod 7 (tightening the first fastening bolt 8 and the second fastening bolt 9);

(2) the auxiliary slider 6 is positioned at the position of the adductor muscle node of the femur (contact position E in fig. 2), at this time, the plane where the first ruler plate 1 and the main handle are located is the plane where the joint line is located, the direction of the joint line is determined according to the included angle between the femur dissection axis of the patient and the mechanical axis, which is the standard process of the total knee joint replacement at present and is not described herein again, and the scale value at the intersection of the second scale line 11 on the sliding rod 7 and the auxiliary slider 6 is the acquired vertical distance from the adductor muscle node to the joint line (for example, the scale position of point a in fig. 1).

In the embodiment, according to the characteristics of Asian femurs, the sliding rod 7 and the second ruler plate 2 form an angle of 61.1 degrees, the requirements of clinical operations are met, and the first ruler plate 1 and the second ruler plate 2 are integrated, so that standardized manufacturing can be performed according to different angle requirements.

The joint line positioning method applicable to knee joint revision in the embodiment can quickly obtain the vertical distance from the adductor nodules to the joint line, is more efficient, and saves the measurement and calculation processes; and measuring errors caused by scale abrasion, insufficient measuring precision and the like can be avoided, and calculation result deviation caused by the reasons can be avoided.

The above description in this specification is merely illustrative of the present invention. Various modifications, additions and substitutions may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.

Claims

1. A joint line positioning instrument suitable for use in a knee revision surgery, comprising: including first chi board, second chi board, main handle, connecting rod, main slider, vice slider and slide bar, first chi board be the contained angle setting and be connected with the main handle with the one end of second chi board, the main handle is perpendicular setting with first chi board and second chi board terminal surface, main slider and vice slider slide respectively and set up on first chi board and the second chi board that corresponds, the slide bar wear to establish to fix on main slider and wear to establish to slide and set up on vice slider, slide bar and first chi board be perpendicular setting, the connecting rod be connected fixedly and be parallel arrangement with the main handle with main slider.

2. The joint line positioning instrument suitable for use in knee revision surgery of claim 1, wherein: the main sliding block is provided with a first fastening bolt for limiting the sliding of the main sliding block on the first ruler plate, and the auxiliary sliding block is provided with a second fastening bolt for limiting the sliding of the sliding rod.

3. The joint line positioning instrument suitable for use in knee revision surgery of claim 1, wherein: the first ruler plate is marked with a first scale mark, the first scale mark marks the vertical distance between the main handle and the main sliding block, the sliding rod is marked with a second scale mark, and the second scale mark marks the vertical distance between the main sliding block and the auxiliary sliding block.

4. The joint line positioning instrument suitable for use in knee revision surgery of claim 1, wherein: the sliding rod and the second ruler plate form an angle of 61.1 degrees.

5. The joint line positioning instrument suitable for use in knee revision surgery of claim 1, wherein: the sliding rod is a cylindrical rod piece.

6. The joint line positioning instrument suitable for use in knee revision surgery of claim 1, wherein: the first ruler plate and the second ruler plate are integrated.