KR100573000B1 - Mechanical acetabulum navigations system - Google Patents

Abstract

The present invention relates to an acetabular navigation device which can reduce the deviation of the corresponding insertion angle of the acetabular cup inserted into the pelvis during hip surgery, and more particularly, a guide part fixedly attached to the fixed part and guiding a linear motion, and the guide. A link unit coupled to the unit to enable sliding movement; A rotation measuring device coupled to the free end of the link unit; And one side is coupled to the rotation measuring instrument, and the other side is provided with an acetabular navigation device comprising a connecting member coupled to the acetabular cup inserting device. The acetabular cup is inserted into the pelvis according to the coordinate values accurately measured during hip surgery by the acetabular navigation device, thereby reducing the insertion angle error, and the device value is inexpensive and easy to install. The time can be reduced and the insertion angle and orientation of the acetabular cup can be quickly corrected during surgery.

Link part, guide part, guide piece, articulated link member, hinge part, connecting member, rotation measuring instrument, acetabular cup inserting device, fixing part

Description

Mechanical Acetabulum navigations system

1 is a perspective view showing an embodiment of a mechanical acetabular navigation device according to the present invention.

FIG. 2 is an enlarged view of a portion A of FIG. 1. FIG.

3 is a side view of FIG. 2;

Figure 4 is a perspective view showing another embodiment of the mechanical acetabular navigation device according to the present invention.

Figure 5 is an exploded perspective view showing a coupling relationship with the fixing portion 400 "that the acetabular navigation device of Figure 4 is installed directly on the pelvis.

Figure 6 is a side view showing a coupling relationship with the fixing portion 400 "that the acetabular navigation apparatus of Figure 4 is installed directly on the pelvis.

7 is a side view showing a state of use on the Y-Z plane of the acetabular navigation device of FIG. 1;

8 is a front view showing a state of use on the X-Z plane of the acetabular navigation apparatus of FIG.

9 is a state diagram used in the rotation measuring unit of the acetabular navigation device of FIG.

[Description of Symbols of Major Parts of Drawing]

10: guide section 11, 21, 31: first, second, and third guide bar

12,22,32: Guide 40,40 ': Link section

41: first articulated link member 42: second articulated link member

41a, 41b, 42a, 42b: link piece 50: first hinge part

51: 1st hinge plate 60,60 ': 2nd hinge part

61, 61 ': second hinge plate 52, 62, 62', 67: fastening member

65: coupling member 69: fixed support

70: connecting member 72: butterfly bolt nut

74: fastener 76: screw

77: bolt 78: elastic member

80: rotating disc 83: bracket

84: rotating shaft 87: connecting piece

88: plate 100: connecting support member

C: rotation measuring device 300: acetabular cup inserting device

310: acetabular cup 320: support rod

400, 400 ', 400 ": fixed part 410: fixed support plate

420: ball joint support 421: protrusion

420a and 420b: upper and lower ball joint supports

440: pin retainer P: pin member

490: ball joint

The present invention relates to an acetabular navigation device which can reduce the deviation of the corresponding insertion angle of the acetabular cup inserted into the pelvis during orthopedic surgery during surgery. The link unit is coupled to one side of the guide portion, the rotation measuring instrument is coupled to the other side of the link portion, and one side is coupled to the rotation measuring instrument and the other side is a mechanical member, characterized in that it comprises a coupling member coupled to the acetabular cup inserting device. It relates to an acetabular navigation system.

In general, when a hip cup is inserted into the pelvis during an artificial hip procedure, when doctors insert it by empirical rule or eye mass, an error of more than 10 degrees frequently occurs, which significantly reduces the durability of the artificial joint or causes dislocation. . Recently, with the development of computerized surgical methods, acetabular cup navigation systems are being developed to reduce such acetabular cup errors.

However, existing patented devices use an optical measuring device, a pin is inserted into the pelvis and a marker attached, or even if the optical measuring device is not used. Most devices are used to navigate the cup. The procedure by these methods can determine the accuracy of the direction of the artificial joint by measuring the deviation and the like present in each of the pelvis using the three points of the pelvis. However, the use of electronic sensors has problems such as infection by wire cables, obstruction of surgery due to the use of a computer in a narrow place, expensive equipment cost, and increased operation time.

In order to solve this problem, the present invention has developed a device capable of navigating the acetabular cup simply, quickly and inexpensively without using a computer or electronic equipment by using an inexpensive mechanical link member without using an expensive optical three-dimensional measuring device.

Accordingly, the present invention has been made in view of the above-described conventional problems, an object of the present invention, mechanical acetabular navigation for reducing the insertion angle error of the acetabular cup inserted into the pelvis during the operation of hip joint surgery during orthopedic surgery To provide a device.

It is also an object of the present invention to provide a mechanical acetabular navigation device capable of quickly correcting the insertion angle and direction of an acetabular cup during an operation.

In addition, it is an object of the present invention, as well as to reduce the time required in the preparation step during the procedure to provide an inexpensive mechanical acetabular navigation device.

In order to achieve the object of the present invention, the mechanical acetabular navigation device according to the present invention is a navigation device for finding the direction of the acetabular cup inserted into the pelvis in artificial hip surgery, the guide portion fixedly fixed to; A link unit coupled to the guide unit to allow parallel rotation without rotation; A rotation measuring device coupled to the free end of the link unit; And one side is coupled to the rotation measuring instrument, the other side is characterized in that it comprises a connecting member coupled to the acetabular cup inserting device.

In addition, the fixing part fixed support plate to which the guide portion is fixedly coupled; A ball joint fixing part fitted to the fixed support plate; A ball joint rotatably coupled to the ball joint fixing part; And a pin fixing device capable of fixing the pin member fixed to the pelvis, wherein the ball joint is connected to an upper portion of the pin fixing device.

The guide unit may include a first guide bar and a first guide piece slidingly coupled to the first guide bar.

The link unit may include at least one or more articulated link members connected by a first hinge unit, and each of the articulated link members may have a link piece having a predetermined length spaced in parallel with one side thereof, and the other side thereof may have a first link portion. It is connected to each other by two hinge portions, the second hinge portion of one side is characterized in that the fixed to the first guide piece.

The link unit may include a second guide bar coupled to the first guide bar at right angles to the guide unit, and a third guide bar coupled to the second guide bar at right angles to form a right angle with the first guide bar. Is characterized in that the mutual sliding coupling.

In addition, each of the guide bar is characterized in that it further comprises a guide piece so as to enable parallel movement coupling without mutual rotation.

The link unit may have at least three degrees of freedom, and the link unit and the guide bar may be combined with each other in any order.

In addition, the rotation measuring device (C) has a connecting pin is fixedly coupled to the other end of the link portion, the rotation disk having a hole of a predetermined diameter through which the rotating shaft passes; A rotating shaft coupled to the rotating disc through the hole and having a fixing ring at one side and a bracket formed at the other side; A plate having a connection piece fixedly coupled to one side of the connection member; And angle measuring means provided to measure a relative rotation angle between the plate and the bracket, wherein the plate and the bracket are connected to each other through a connection supporting member.

The angle measuring means may include a protractor fixed to an outer surface of the bracket and a needle member fixed to the connection support member and provided at a corresponding position of the protractor.

In addition, the connection member is characterized in that one side is fixedly coupled to the connection piece, the other side is fitted into a predetermined position of the support rod of the acetabular cup inserting device.

Other objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and the preferred embodiments associated with the accompanying drawings.

Hereinafter, with reference to the accompanying drawings, the configuration of the present invention will be described in detail.

1 is a perspective view showing an embodiment of a mechanical acetabular navigation device according to the present invention, Figure 2 is an enlarged view of the portion A of Figure 1, Figure 3 is a side view of FIG. As shown in Figure 1, the mechanical acetabular navigation device is a measuring device for finding the direction of the acetabular cup inserted into the pelvis in artificial hip surgery, the guide portion 10, the link portion fixedly fixed to the fixed portion (not shown) 40, the rotation measuring device (C), and the connecting member 70 is coupled to the acetabular cup inserting device (300).

Here, the fixing part (not shown) may be a fixing bed directly connected to the operating bed or pelvic guide, or pelvis.

The guide part 10 has a predetermined width and is formed to extend in one direction, and the first guide bar 11 having grooves formed in the longitudinal direction on both sides thereof and the first guide bar 11 formed in the shape so as to correspond to the grooves so as to be slidable. It may be composed of one guide piece (12).

One end of the first guide bar 11 is attached to the operation bed or pelvic guide by fixing means such as a clamp (not shown), or is fixedly attached to the pelvis connection (not shown), the first guide piece 12 May move back and forth along the longitudinal direction of the first guide bar 11.

In addition, the link portion 40 may be composed of two articulated link members 41 and 42 connected to the first hinge portion 50.

Here, the first articulated link member 41 is composed of a pair of link pieces 41a and 41b of predetermined length spaced in parallel. One side of each of the link pieces 41a and 41b is coupled between the first hinge plate 51 through the first fastening member 52, and the other side thereof is the second hinge plate 61 of the second hinge part 60. Each of the link pieces 41a and 41b are coupled to each other through the second fastening member 62 therebetween, and the link pieces 41a and 41b may rotate together with the first fastening member 52 or the second fastening member 62 as an axis. Make sure Similarly, the second articulated link member 42 also includes a pair of link pieces 42a and 42b of predetermined length spaced in parallel, and one side of each link piece 42a or 42b is the first hinge portion 50. In addition, the other side is coupled to the second hinge portion (60 '), respectively, so that each link piece (42a, 42b) is connected to each other accompanying the first fastening member (52) or the second fastening member (62) as an axis Can be rotated.

In addition, the first hinge part 50 is composed of two trapezoidal first hinge plates 51 and four first fastening members 52, and the second hinge parts 60 and 60 ′ are each perpendicular to each other. It consists of a trapezoidal bracket-shaped second hinge plate 61 (61 ') and two second fastening members (62, 62'). The first fastening member 52 and the second fastening member 62, 62 'is composed of a butterfly bolt nut, but can be fastened in various ways.

In addition, the second hinge plate 61 of the first articulated link member 41 is fixedly attached to one side of the bracket-shaped fixed support 69 through the coupling member 65 with a third fastening member 67, and fixed. The bracket 69 is fixedly mounted to the first guide piece 12. The third fastening member 67 is composed of a conventional bolt nut, but can be fixed and attached by various methods such as thread coupling and welding.

In addition, a rotation measuring device C is attached to one outer surface of the second hinge plate 61 ′ of the second articulated link member 42, and the acetabular cup inserting device 300 is connected to the rotation measuring device by the connecting member 70. Is connected to. As shown in Figures 2 and 3, the rotation measuring device (C) may be composed of a rotating shaft 84, the plate 88 and the angle measuring means formed with a rotating disk 80 and the bracket (83).

Here, the rotation disc 80 is connected to the connecting pin 81 on one side and the angle scale is displayed so that the rotation angle can be measured on the other side, the center having a predetermined diameter hole (not shown) As a disc of thickness, it is attached to one outer side of the second hinge plate 61 'of the second articulated link member 42 via a connecting pin 81.

The rotating shaft 84 is a cylindrical shape having a predetermined diameter to which the fixing ring 85 can be coupled at one end, and the bracket 83 is integrally formed at the other end. The rotating shaft 84 is coupled to the rotating disk 80 by inserting a fixing ring at one end passing through a hole provided in the center of the rotating disk 80.

The plate 88 is a disc of a predetermined thickness having a coupling hole at the center and a connecting piece 87 at the side, and is sandwiched between the brackets 83 of the rotational shaft 84 and connected to each other through the connection supporting member 100.

In addition, the connecting member 70 is a fork shape of which one end is a 'U', one side is fixedly coupled to the connecting piece 87 by a butterfly bolt nut 72, the other 'U' end is inserted into a conventional acetabular cup It is fitted in a predetermined position of the support rod 320 of the device 300 is fixed with a fastener (74). The shape of one end of the connection member is not limited to the 'U' shape may be in a variety of shapes that can be easily removable.

Angle measuring means may be composed of a protractor 200 and the needle member (210). Protractor 200 is fixed to the outer surface of the bracket 83, the needle member 210 is fixed to the connection support member 100 to measure the relative rotation angle of the plate 88 and the bracket 83 It is provided at the corresponding position of the protractor 220.

The rotation measuring device having the above-described structure can measure the two rotation angles, that is, the relative rotation angle between the plate 88 and the bracket 83 and the relative rotation angle between the rotation disc 80 and the bracket 83. In addition to the tachometer can be made in a variety of shapes.

The conventional acetabular cup inserting apparatus 300 is composed of a thin hemisphere shaped acetabular cup 310 and a support rod 320 of a predetermined length vertically fixed to the acetabular cup 310, the support rod 320 is adjustable in position and easy to attach and detach. It is fitted to the 'U' end of the connecting member 70 in a predetermined position. Typically, the acetabular cup inserting device 300 is made of a material capable of high temperature disinfection and is treated in the same manner as a general surgical tool.

Figure 4 is a perspective view showing another embodiment of the mechanical acetabular navigation device according to the present invention, Figures 5 and 6 show a coupling relationship with the fixing portion 400 "that the acetabular navigation device of Figure 4 is directly installed in the pelvis. One exploded perspective view and side view, as shown in Figures 4, 5 and 6, the mechanical acetabular navigation device is a guide portion 10 fixedly fixed to the pelvic rest 400 ', or pelvic connection fixing 400 ". ); Link portion 40 '; Rotation measuring device (C); And a connecting member 70 coupled to the acetabular cup inserting apparatus 300.

Here, the pelvic guide 400 'may be any other support, such as a surgical bed, the first guide portion 11 may be fixed by a clamp (not shown) or the like.

In addition, the fixing part 400 ″ may include a fixing support plate 410, a ball joint fixing part 420, a ball joint 490, a pin member P, and a pin fixing device 440. .

The fixed support plate 410 has a guide groove in which the "U" -shaped elastic member 78 can be fitted is formed to be long in one direction, and two insertion holes H are formed.

The ball joint fixing part 420 is divided into the upper part 420a and the lower part 420b, and the space of a predetermined diameter is formed in the center. On the upper surface of the upper portion (420a) is formed a projection 421 that can be fitted to correspond to the two insertion holes (H), the upper portion (420a) and lower portion (420b) is fixedly fixed using a screw 76 do.

The ball joint 490 has a spherical shaft having a predetermined diameter and is fitted to the ball joint fixing part 420 so as to be freely rotatable.

Pin fixing device 440 is a pin insertion hole is formed to fix the pin member (P) is fixed to the pelvis, one side is provided with a bolt 77. The upper surface is coupled with the connecting shaft of the ball joint 490. By using such a fixed portion 400 ", the degree of freedom of the link portion 40 'of the acetabular navigation device can be increased.

As described above, the guide part 10 has a predetermined width and is elongated in one direction (X-axis), the first guide bar 11 having grooves formed in the longitudinal direction on both side surfaces thereof, and shaped in the grooves. Corresponding to the first guide piece 11 mounted to enable the sliding movement is provided to move back and forth along the longitudinal direction (X axis).

In addition, the link portion 40 ′ is coupled to the second guide bar 21 and the second guide bar 21 at a right angle (Y-axis) to the first guide bar 11 at a right angle, but is coupled to the first guide bar. The third guide bar 31 may also be formed at right angles (Z axis) to (11). The second guide bar 21 and the third guide bar 31 have the same shape as the first guide bar 11. In addition, the second guide bar 21 has a second guide piece 22 which is coupled to be slidable along the Y axis in a shape corresponding to the groove formed in the longitudinal direction (Y axis) on both sides, the first The guide piece 11 and the second guide piece 22 are fixedly attached to each other. As shown, the first guide piece 11 and the second guide piece 22 may be separately formed and then fixedly attached or may be integrally formed.

The third guide bar 31 has a third guide piece 33 mounted so as to be slid along the Z axis in the longitudinal direction corresponding to the grooves formed on both sides thereof, and the third guide piece 33 One end of the second guide bar 21 is fixedly coupled to the upper portion. Accordingly, the link portion 40 'may have three degrees of freedom with respect to the pelvic anchor 400' or the pelvic connecting anchor 400 ".

In addition, the shape of each guide piece (12, 22, 32) can be modified into a variety of structures that allow each guide bar (11, 21, 31) to be slidingly coupled to each other.

The above-described rotation measuring device C is attached to one end of the third guide bar 31, and the acetabular cup inserting device 300 is connected to the rotation measuring device C through a connecting member 70.

As described above, the link portion 40 ′ coupled to the guide portion 10 is provided with respect to the pelvic anchor or pelvic linkage of the patient for accurate measurement of the position of the pelvis on the plane and the height of the pelvis. It is desirable to have at least three degrees of freedom.

In addition to the illustrated structure, the link unit may be configured in various ways. That is, a part of the above-described link parts 40 and 40 'may be coupled to each other to form another link part, and another shape of the link part may be made by changing the coupling order. In addition, it is also possible to measure the rotation angle at each joint by connecting a rotation meter to each rotation joint. However, since the direction of the acetabular cup is determined by two angles (internal and external angle and foreground angle), at least two rotation measuring instruments are required.

Hereinafter, a method of using the mechanical acetabular navigation device according to the present invention will be described with reference to FIGS. 7 to 9.

7 to 9 are views showing the state of use of the acetabular navigation device of FIG. First, the acetabular cup direction vector is determined based on the anatomical alignment criteria based on the patient's pelvic anterior drawing (not shown). According to this information, the practitioner (doctor) fixes the first guide piece 12 of the acetabular navigation apparatus at a predetermined position on the X axis as shown, and first adjusts the link portion 40 on the YZ plane to insert the acetabular cup. The pelvis position coordinates are corrected, and then the coordinates are corrected on the XZ plane. Thereafter, by adjusting the fitting position of the two degrees of freedom of the rotation measuring device (C) and the acetabular cup inserting apparatus 300, the acetabular cup 310 is accurately inserted in accordance with the planned direction.

These mechanical acetabular navigation devices can also be operated manually. In addition, by installing a rotation measuring device for each rotational joint and connected to a computer, the direction of the acetabular cup inserting device is presented on a computer screen in real time to allow the operator (doctor) to monitor the angle of the acetabular cup inserting device in real time. This allows the operator to install the acetabular cup at the desired angle. At this time, the rotation measuring device may be configured as an electronic measuring device to inform the computer of the rotation of the acetabular cup in real time.

According to the mechanical acetabular navigation device according to an embodiment of the present invention having the above-described configuration, the acetabular cup is inserted into the pelvis according to the coordinate value accurately measured when performing an artificial hip surgery, thereby reducing the insertion angle error. have.

In addition, the device is not only inexpensive, but also easy to install, which can reduce the time required for the preparation stage of the hip joint surgery, as well as quickly correct the insertion angle and orientation of the acetabular cup during the operation.

Although the present invention has been described in connection with the above-mentioned preferred embodiments, various other modifications and variations may be made without departing from the spirit and scope of the invention. Accordingly, the appended claims include those modifications and variations that fall within the true scope of the invention.

Claims (10)

In the navigation device for finding the direction of the acetabular cup inserted into the pelvis in artificial hip surgery, A guide part 10 fixedly attached to the fixing parts 400, 400 ′ and 400 ″ to guide linear movement; A link unit 40, 40 ′ coupled to the guide unit 10 to enable sliding movement; A rotation measuring device (C) coupled to the free end of the link unit (40, 40 '); And One side is coupled to the rotation measuring device (C), the other side is a mechanical acetabular navigation device, characterized in that it comprises a connection member (70) coupled to the acetabular cup inserting device (300). The method of claim 1, The fixing part 400 " A fixed support plate 410 to which the guide part 10 is fixedly coupled; A ball joint fixing part 420 fitted to the fixed support plate 410; A ball joint 490 rotatably coupled to the ball joint fixing part 420; And It includes a pin fixing device 440 that can fix the pin member (P) is fixed to the pelvis, The ball joint 490 is a mechanical acetabular navigation device, characterized in that connected to the upper portion of the pin fixing device (440). The method of claim 1, The guide portion (10) is a mechanical acetabular navigation device, characterized in that composed of a first guide piece (12) slidingly coupled to the first guide bar (11) and the first guide bar (11). The method of claim 1, The link portion 40 includes at least one or more articulated link members 41 and 42 connected by the first hinge part 50, and each of the articulated link members 41 and 42 is spaced apart in parallel. The link pieces 41a, 41b, 42a, and 42b of the length are connected to each other by the first hinge part 50 on one side and the second hinge parts 60 and 60 'on the other side, and the second hinge part ( 60 is a mechanical acetabular navigation device, characterized in that fixed to the first guide piece (12). The method of claim 1, The link part 40 ′ is coupled to the second guide bar 21 and the second guide bar 21 at right angles to the first guide bar of the guide part 10, and is coupled to the first guide bar at right angles. And a third guide bar (31) which also forms a right angle with the (11), wherein each of the guide bars (11, 21, 31) is characterized in that the sliding sliding coupling mechanism. The method of claim 5, wherein Each of the guide bar (11, 21, 31) mechanical acetabular navigation device further comprises a guide piece (12, 22, 32) so as to enable parallel movement without mutual rotation. The method according to claim 4 or 5, The link portions 40 and 40 'have at least three degrees of freedom, and the link portions 40 and 40' and the guide bars 11, 21, and 31 may be combined in any order. Mechanical acetabular cup navigation system.  The method of claim 1, The rotation measuring device (C) A connecting pin 81 fixedly coupled to the other end of the link portion 40 and 40 'is attached to one side, and an angle scale for measuring the rotation angle is displayed on the other side, and a rotating shaft ( A rotation disc 80 having a hole 82 of a predetermined diameter through which 84 passes; A rotating shaft 84 coupled to the rotating disc 80 through the hole 82, having a fixing ring at one side and a bracket 83 formed at the other side; A plate 88 having a connection piece 87 fixedly coupled to one side of the connection member 70; And It includes an angle measuring means provided to measure the relative rotation angle between the plate 88 and the bracket 83, The plate 88 and the bracket 83 is a mechanical acetabular navigation device, characterized in that interconnected via a connecting support member (100). The method of claim 8, The angle measuring means includes a protractor 220 fixed to the outer surface of the bracket 83 and the needle member 210 fixed to the connection support member 100 and provided at a corresponding position of the protractor 220. Mechanical acetabular navigation device comprising a. The method of claim 1, The connecting member (70) is fixed to one side of the connecting piece (87), the other side is a mechanical acetabular navigation device, characterized in that the fitting position of the support rod 320 of the acetabular cup inserting device (300).

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