Positioner for replacing thighbone vertex by artificial hip joint

Abstract

The utility model discloses a positioner for replacing a thighbone vertex by an artificial hip joint. The positioner for replacing the thighbone vertex through the artificial hip joint comprises a supporting mechanism, two transverse rods are installed at one end of the supporting mechanism, positioning needles are installed at the ends of the transverse rods, a foldable bevel protractor is installed on one sides of the two transverse rods, a pointer and a limiting piece are installed on the supporting mechanism, and the limiting piece is used for limiting the transverse rods. According to the positioner for replacing the thighbone vertex through the artificial hip joint, the supporting mechanism, the transverse rod, the positioning needle, the bevel protractor, the pointer and the limiting piece are arranged, the transverse rod is folded on the side face of the supporting mechanism, the bevel protractor is folded, the device can be conveniently folded, the occupied space of the device can be effectively reduced, and the device is convenient to use. And the device is convenient to store and transport.

Description

Technical Field

[0001] The utility model relates to the technical field of orthopedic joint replacement, in particular to a locator for artificial hip joint replacement of femoral apex. Background Art

[0002] The hip joint is composed of the acetabulum and the femoral head. It is a typical ball-and-socket joint. It is wrapped in a strong, thick and tough joint capsule, surrounded by many ligaments and powerful muscle groups, and is extremely stable. The acetabulum is an inverted cup-shaped deep socket in the middle of the lateral surface of the hip bone, facing forward, outward and downward. It is composed of the ilium, ischium and pubic body, and articulates with the femoral head. The acetabulum joint cavity is the strongest and deepest in the upper posterior part. The articular cartilage is horseshoe-shaped or half-moon-shaped, called the lunar surface. The upper part is wider and thicker, and the front and back parts are slightly narrower and thinner. The bottom of the acetabulum in the center without articular cartilage is called the acetabular fossa. The surface of the fossa is filled with adipose tissue covered with synovium, which can be squeezed out or inhaled as the intra-articular pressure increases or decreases to maintain the balance of intra-articular pressure. When the normal acetabulum is in an upright position, its entrance plane is outward, forward and downward. The angle of outward and downward tilt is generally the abduction angle, and the angle of forward tilt is the anteversion angle. The abduction angle is 40°±10°, and the anteversion angle is 15°±10°. The femoral head is slightly flat at the top, and the whole body is spherical, accounting for about 2 / 3 of the spherical surface, tilting inward, upward, and forward, and articulating with the acetabulum. The front of the femoral neck is relatively flat, and the back is smooth and concave; the upper edge is short and blunt, and moves outward and downward to the greater trochanter of the femur; the lower edge is long and sharp, and moves outward and downward to the lesser trochanter of the femur. The axis of the femoral neck and the longitudinal axis of the femoral shaft form a neck-shaft angle of about 110° to 140°, with an average of 127°. An angle greater than this is called coxa valga, and an angle less than this is called coxa varum. In the sagittal plane, the long axis of the femoral neck and the frontal plane of the femoral shaft form another angle, called the anteversion angle, which is about 12° to 15 in adults. The main purpose of artificial hip replacement is to relieve hip pain, correct deformities, and restore and improve the movement function of the hip joint.

[0003] The existing document with publication number CN213190328U discloses a locator for the apex of the femur in artificial hip replacement, including a center seat, a column, a crossbar, a pointer and a semicircular disk; a crossbar is fixed on the center seat, one end of the crossbar is an anterior superior iliac spine positioning contact, and the other end is a pubic symphysis positioning contact, and the inner sides of the contacts at both ends of the crossbar are respectively connected to the semicircular disk, and the semicircular disk is provided with angle scale lines, and a pointer is provided on the center seat, and the pointer and the semicircular disk are in the same plane, and the pointer can rotate around the center seat; a column is connected to the center seat, and the column is perpendicular to the plane where the semicircular disk is located, and the top of the center seat is an acetabulum positioning contact; the pointer points to the apex of the greater trochanter, and the direction angle required for the prosthesis is read according to the pointer, and the length of the prosthesis is measured. The device is convenient for locating the acetabulum position, measuring the length and direction of the required prosthesis, and facilitating later surgery.

[0004] However, the device cannot be folded and cannot be reduced in size, and requires a large amount of storage space temporarily, so it is inconvenient to store.

[0005] Therefore, it is necessary to provide a locator for the apex of the femur in artificial hip replacement to solve the above technical problems. Utility Model Content

[0006] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a positioner for the apex of the femur of an artificial hip replacement, which can be folded for easy storage.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0008] The locator for the apex of the femur in artificial hip replacement includes: a support mechanism, two cross bars are installed at one end of the support mechanism, positioning pins are installed at the ends of the cross bars, and a foldable angle ruler is installed on one side of the two cross bars. The cross bars and the angle ruler can be folded inwards. A pointer and a limit piece are installed on the support mechanism, and the limit piece is used to limit the cross bar.

[0009] Preferably, the angle ruler comprises a first angle plate, two ends of the first angle plate are hingedly rotatably mounted with a second angle plate, one end of the second angle plate is fixedly connected to the cross bar, and scale lines are provided on the first angle plate and the second angle plate.

[0010] Preferably, the supporting mechanism includes a base, which is hinged to the cross bar, a limiting plate is installed at the bottom of the base, the limiting plate limits the bottom of the cross bar, a rotating shaft is installed at the top of the base, the rotating shaft is connected to the limiting piece, a handle is installed at the top of the rotating shaft, and the handle is fixedly connected to the pointer.

[0011] Preferably, a socket is provided on the handle.

[0012] Preferably, a center hole is provided in the middle of the limiting member, the rotating shaft passes through the center hole, and two limiting grooves are symmetrically provided on the limiting member, and the width of the limiting grooves is greater than the width of the cross bar.

[0013] Preferably, a non-slip sheet made of rubber is installed on the inner wall of the limiting groove.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] (1) The utility model is provided with a support mechanism, a cross bar, a positioning needle, an angle ruler, a pointer and a limiter. By folding the cross bar to the side of the support mechanism and folding the angle ruler, the device can be easily folded, which can effectively reduce the space occupied by the device and facilitate the storage and transportation of the device.

[0016] (2) The utility model can conveniently fold the angle ruler by providing an angle ruler including a first angle plate and two second angle plates;

[0017] (3) The utility model can conveniently support the crossbar and the pointer by providing a support mechanism including a base, a limit plate, a handle and a rotating shaft, so that the crossbar and the pointer can rotate;

[0018] (4) The utility model provides a socket on the handle to facilitate storage of the positioning pin, thereby improving the safety of the device;

[0019] (5) The utility model can conveniently limit the crossbar by symmetrically providing limiting grooves on the limiting member;

[0020] (6) The utility model can prevent the cross bar from falling out of the limit groove easily by installing an anti-slip sheet in the limit groove, thereby improving the stability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the structure of a locator for the apex of the femur in artificial hip replacement provided by the utility model;

[0022] Figure 2 for Figure 1 A schematic diagram of the use of a locator for the apex of a femur in an artificial hip replacement is shown;

[0023] Figure 3 for Figure 1 The schematic diagram of the structure of the angle ruler in the locator of the femoral apex of artificial hip replacement is shown;

[0024] Figure 4 for Figure 1 The schematic diagram of the structure of the support mechanism in the locator of the femoral apex of the artificial hip replacement is shown;

[0025] Figure 5 for Figure 1 The schematic diagram of the structure of the limiting component in the locator of the femoral apex of the artificial hip replacement is shown.

[0026] Among them, the names corresponding to the figure marks are: 1-support mechanism, 2-cross bar, 3-positioning needle, 4-angle ruler, 5-pointer, 6-first angle plate, 7-second angle plate, 8-base, 9-limiting plate, 10-handle, 11-jack, 12-rotating shaft, 13-limiting member, 14-center hole, 15-limiting groove. DETAILED DESCRIPTION

[0027] The present invention is further described below in conjunction with the accompanying drawings and embodiments. The present invention includes but is not limited to the following embodiments.

[0028] Embodiment 1:

[0029] like Figure 1-5 As shown, the utility model provides a locator for the apex of the femur of an artificial hip replacement, comprising: a support mechanism 1, one end of the support mechanism 1 is equipped with two cross bars 2, the end of the cross bar 2 is equipped with a positioning pin 3, and one side of the two cross bars 2 is equipped with a foldable angle ruler 4, such as Figure 2 As shown, the cross bar 2 and the angle ruler 4 can be folded inwards, and a pointer 5 and a limiter 13 are installed on the support mechanism 1. The limiter 13 is used to limit the cross bar 2. When in use, Figure 1 As shown, find the anterior superior iliac spine and pubic symphysis, insert two positioning needles 3 into the anterior superior iliac spine and pubic symphysis of the human body respectively, so that the device is fixed and stable, rotate the support mechanism 1, and make the pointer 5 rotate accordingly. When the pointer 5 points to the greater trochanter position, read the angle according to the scale line on the angle ruler 4 that is aligned with the pointer 5 to obtain the direction of the prosthesis, and then measure the prosthesis depth in this direction, which can facilitate the replacement of the hip joint prosthesis root and is easy to use. When the device is used, rotate the limiter 13 to release the angle limit on the cross bar 12, and then bend the distal end of the cross bar 2 (the end with the positioning needle 3) to the side close to the support mechanism 1, so that the cross bar 2 flips over, and the angle ruler 4 is folded along with the cross bar 2, so that the device finally presents Figure 2 The folded state shown can effectively reduce the space occupied by the device, making it easier to store and transport.

[0030] By setting up a support mechanism 1, a cross bar 2, a positioning needle 3, an angle ruler 4, a pointer 5 and a limit piece 13, and by folding the cross bar 2 to the side of the support mechanism 1 and folding the angle ruler 4, the device can be easily folded, which can effectively reduce the space occupied by the device and facilitate the storage and transportation of the device.

[0031] Embodiment 2:

[0032] like Figure 3 As shown, the angle ruler 4 includes a first angle plate 6, two ends of the first angle plate 6 are hingedly rotatably installed with two second angle plates 7, one end of the second angle plate 7 is fixedly connected to the cross bar 2, and scale lines are set on the first angle plate 6 and the second angle plate 7. When in use, the cross bar 2 rotates to drive the second angle plate 7 to rotate. After the second angle plates 7 at both ends of the first angle plate 6 are rotated 90 degrees, the angle ruler 4 is folded.

[0033] By providing the angle ruler 4 including the first angle plate 6 and the two second angle plates 7, the angle ruler 4 can be conveniently folded.

[0034] Embodiment 3:

[0035] like Figure 4As shown, the support mechanism 1 includes a base 8, the base 8 is hinged to the cross bar 2, a limit plate 9 is installed at the bottom of the base 8, the limit plate 9 limits the bottom of the cross bar 2, a rotating shaft 12 is installed at the top of the base 8, the rotating shaft 12 is connected to the limit member 13, a handle 10 is installed at the top of the rotating shaft 12, and the handle 10 is fixedly connected to the pointer 5. When in use, when the device is as shown in FIG. Figure 1 In the state shown, the limit plate 9 limits the bottom of the cross bar 2, and the limit member 13 limits the top of the cross bar 2, so that the angle of the cross bar 2 is fixed. The handle 10 is held and rotated about the rotation axis 12, so that the pointer 5 rotates with the handle 10.

[0036] By providing a support mechanism 1 including a base 8, a limiting plate 9, a handle 10 and a rotating shaft 12, the crossbar 2 and the pointer 5 can be conveniently supported so that the crossbar 2 and the pointer 5 can rotate.

[0037] Embodiment 4:

[0038] like Figure 2 and Figure 4 As shown, a socket 11 is provided on the handle 10. When the cross bar 2 is folded, the positioning pin 3 is inserted into the socket 11, so that the positioning pin 3 can be stored conveniently. The positioning pin 3 stored in the socket 11 is not easy to cause puncture when taking out the device, and is safer to use.

[0039] By providing the insertion hole 11 on the handle 10, the positioning pin 3 can be conveniently stored, thereby improving the safety of the device.

[0040] Embodiment 5:

[0041] like Figure 5 As shown, a center hole 14 is provided in the middle of the limiting member 13, and the rotating shaft 12 passes through the center hole 14, and two limiting grooves 15 are symmetrically provided on the limiting member 13, and the width of the limiting grooves 15 is greater than the width of the cross bar 2. When in use, the limiting member 13 is rotated, and when the limiting grooves 15 are aligned with the cross bar 2, the cross bar 2 can be flipped upward 90 degrees so that the cross bar 2 is inserted into the limiting grooves 15, thereby folding the cross bar 2. When the limiting grooves 15 are misaligned with the cross bar 2, the bottom of the limiting member 13 is pressed tightly against the top of the cross bar 2, thereby limiting the cross bar 2.

[0042] The limiting grooves 15 are symmetrically provided on the limiting member 13 , so that the cross bar 2 can be limited conveniently.

[0043] Embodiment 6:

[0044] A rubber anti-skid sheet is installed on the inner wall of the limiting groove 15. During use, when the cross bar 2 is inserted into the limiting groove 15, the cross bar 2 squeezes the anti-skid sheet and deforms it, so that the cross bar 2 and the limiting groove 15 are subjected to the self-stress of the anti-skid sheet, making it difficult for the cross bar 2 to fall out of the limiting groove 15, making the device difficult to fall apart after being folded, and being more stable.

[0045] By installing an anti-slip sheet in the limiting groove 15, the cross bar 2 is not easily dislodged from the limiting groove 15, thereby improving the stability of the device.

[0046] Working principle: When in use, find the anterior superior iliac spine and pubic symphysis, insert two positioning needles 3 into the anterior superior iliac spine and pubic symphysis of the human body respectively to fix and stabilize the device, rotate the support mechanism 1 to make the pointer 5 rotate accordingly, and when the pointer 5 points to the greater trochanter position, read the angle value according to the scale line on the angle ruler 4 that is aligned with the pointer 5 to obtain the direction of the prosthesis, and then measure the depth of the prosthesis in this direction, which can facilitate the replacement of the hip joint prosthesis and is easy to use. When the device is finished using, rotate the limiter 13 to release the angle limit on the cross bar 12, and then bend the distal end of the cross bar 2 (the end with the positioning needle 3) to the side close to the support mechanism 1 to flip the cross bar 2, and the angle ruler 4 is folded along with the cross bar 2 so that the device finally presents Figure 2 The folded state shown can effectively reduce the space occupied by the device, making it easier to store and transport.

Claims

1. A locator for the apex of the femur in artificial hip replacement, characterized in that: include: A support mechanism (1), wherein two cross bars (2) are mounted at one end of the support mechanism (1), positioning pins (3) are mounted at the ends of the cross bars (2), and a foldable angle ruler (4) is mounted on one side of the two cross bars (2). A pointer (5) and a limiter (13) are mounted on the support mechanism (1), and the limiter (13) is used to limit the cross bars (2).

2. A locator for the femoral apex of an artificial hip replacement according to claim 1, characterized in that: The angle ruler (4) comprises a first angle plate (6), and second angle plates (7) are rotatably mounted at both ends of the first angle plate (6), and one end of the second angle plate (7) is connected to the cross bar (2).

3. A locator for the femoral apex of an artificial hip replacement according to claim 1, characterized in that: The support mechanism (1) comprises a base (8), the base (8) is hinged to the cross bar (2), a limit plate (9) is installed at the bottom of the base (8), a rotating shaft (12) is installed at the top of the base (8), the rotating shaft (12) is connected to the limit member (13), a handle (10) is installed at the top of the rotating shaft (12), and the handle (10) is connected to the pointer (5).

4. A locator for the apex of a femur for artificial hip replacement according to claim 3, characterized in that: The handle (10) is provided with an insertion hole (11).

5. The locator for the femoral apex of artificial hip replacement according to claim 1, characterized in that: The limiting member (13) is provided with two limiting grooves (15).

6. A locator for the femoral apex of artificial hip replacement according to claim 5, characterized in that: An anti-slip sheet is installed inside the limiting groove (15).

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