Hip joint front inclination angle measuring device
By designing a hip joint forward angle measurement device including a spring and a threaded sleeve, the problem of loosening of the device in the prior art after a long time of use is solved, and more stable use and convenient maintenance are achieved.
Patent Information
- Application Number
- CN202421275424.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-05
- Publication Date
- 2025-03-21
- Estimated Expiration
- 2034-06-05
AI Technical Summary
After a long time of use, the existing hip joint anterior inclination measurement device is loosened between the various branches, causing the rotating parts to be unable to clamp, affecting subsequent use.
A hip joint forward angle measurement device including a first part, a second part, a calf reference part, an auxiliary reference part, a thread sleeve and a fixing rod is designed. By squeezing the spring and the arrangement of the thread sleeve and the screw, loosening is avoided and spring replacement is facilitated.
It effectively avoids loosening between the various parts, ensures that the rotating parts can be clamped, improves the stability of the device's use, and facilitates the replacement of damaged springs, extending the service life of the device.
Smart Images
Figure CN222640681U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of hip joint anteversion angle measurement, in particular to a hip joint anteversion angle measurement device. Background Art
[0002] Dislocation of joint prosthesis after total hip replacement is a common complication. There are many factors that lead to dislocation, the most important of which is inaccurate placement of the prosthesis anteversion angle during surgery. Generally, the anteversion angle includes the acetabular anteversion angle and the femoral stem anteversion angle. Under normal circumstances, it is recommended that the acetabular anteversion angle and the femoral stem anteversion angle are both 15°~20°, and the combined anteversion angle is 30°~40°. However, for patients with hip dysplasia, the femoral stem anteversion angle is very large and difficult to adjust to 15°~20°. At this time, the acetabular anteversion angle needs to be reduced. In the teaching of medical colleges, the teaching of this operation has always been relatively It is difficult. Due to the influence of many factors such as the lack of actual treatment experience of teachers, the accurate placement of the anteversion angle cannot be achieved, and the error is large. If the installation position of the prosthesis is incorrect during replacement, it may lead to severe movement restriction or prosthesis dislocation for the patient. In mild cases, the prosthesis is subjected to uneven force for a long time and wears out quickly, resulting in a sharp reduction in the service life of the prosthesis. Generally speaking, a successful artificial hip replacement can provide patients with 20 years or even longer service. However, if the joint is subjected to uneven force for a long time due to deviation in the installation position, the service life of the artificial hip joint will be sharply reduced to 7-8 years or even shorter.
[0003] The prior art patent CN114522000A discloses a hip joint anteversion angle measuring device and a measuring method thereof, comprising a reference portion, a calf reference portion vertically matched with the reference portion, and an angle-adjustable auxiliary reference portion matched with one end of the calf reference portion close to the reference portion. Through the right-angle reciprocal relationship in mathematical principles, a reliable device is provided to assist the key steps of anteversion angle measurement in teaching, making the determination of anteversion angle faster and simpler.
[0004] However, in the above-mentioned prior art, after long-term use, different degrees of looseness will occur between the first division, the second division, the calf reference portion, the auxiliary part reference portion and the rotating member, so that the rotating member cannot clamp the first division, the second division, the calf reference portion and the auxiliary part reference portion, thereby affecting subsequent use. Utility Model Content
[0005] The utility model aims to provide a device for measuring the anteversion angle of a hip joint, aiming to solve the technical problem in the prior art that after long-term use, the first division, the second division, the calf reference portion, the auxiliary component reference portion and the rotating member will become loose to varying degrees, so that the rotating member cannot clamp the first division, the second division, the calf reference portion and the auxiliary component reference portion, thereby affecting subsequent use.
[0006] To achieve the above-mentioned purpose, the utility model adopts a hip joint anteversion angle measuring device, including a first sub-section, a second sub-section, a calf reference section, an auxiliary part reference section, a threaded sleeve and a fixed rod, the calf reference section and the auxiliary part reference section are both provided with a length scale, one end of the threaded sleeve is provided with a holding ring, the head of the fixed rod is provided with a screw, the tail of the fixed rod is provided with a bottom plate, the fixed rod is sequentially sleeved with a spring, an angle dial, a first disc, a second disc, a third disc, a fourth disc and a bottom ring from the head to the tail, the first sub-section, the second sub-section, the lower leg reference section and the auxiliary part reference section are provided with a length scale, one end of the threaded sleeve is provided with a holding ring, the head of the fixed rod is provided with a screw, the tail of the fixed rod is provided with a bottom plate, the fixed rod is sequentially sleeved with a spring, an angle dial, a first disc, a second disc, a third disc, a fourth disc and a bottom ring from the head to the tail, The part, the calf reference part and the auxiliary part reference part are respectively slidably connected to the fixed rod and are sequentially sleeved on the fixed rod, and the first sub-part is located between the angle dial and the first disk, the second sub-part is located between the first disk and the second disk, the calf reference part is between the second disk and the third disk, the auxiliary part reference part is located between the third disk and the third disk, the threaded sleeve is threadedly connected to the screw rod and sleeved on the screw rod, and the spring is supported between the supporting ring and the angle dial.
[0007] Among them, the inner sides of the angle scale, the first disc, the second disc, the third disc and the fourth disc are all provided with a plurality of limit blocks, the outer side of the fixing rod has a plurality of limit grooves, and the limit blocks are located in the limit grooves.
[0008] The first disk, the second disk, the third disk and the fourth disk have the same structure, and the end faces of the first disk, the second disk, the third disk and the fourth disk all have a semicircular concave surface and a semicircular convex surface.
[0009] Wherein, the hip joint anteversion angle measuring device also includes a plurality of anti-slip protrusions, and the plurality of anti-slip protrusions are respectively bonded to the bottom film and are located on the other end surface of the bottom film.
[0010] Wherein, the hip joint anteversion angle measuring device also includes a first supporting surface and a second supporting surface, and one end of the first supporting surface and the second supporting surface are both provided with a contact block, the first supporting surface is bonded to the first division and is located on the back of the first division, and the second supporting surface is bonded to the second division and is located on the back of the second division.
[0011] Wherein, a plurality of anti-slip convex strips are arranged on the outer side of the threaded sleeve.
[0012] Wherein, the anti-slip protrusion, the first abutting surface, the second abutting surface, the contact block and the anti-slip convex strip are all made of natural rubber.
[0013] The utility model discloses a hip joint anteversion angle measuring device, comprising a first section, a second section, a calf reference section, an auxiliary component reference section, a threaded sleeve and a fixed rod, wherein the calf reference section and the auxiliary component reference section are both provided with length scales, one end of the threaded sleeve is provided with a supporting ring, the head of the fixed rod is provided with a screw rod, the tail of the fixed rod is provided with a bottom plate, the fixed rod is sequentially provided with a spring, an angle scale plate, a first disc, a second disc, a third disc, a fourth disc and a bottom ring from the head to the tail, the first section, the first section, the second section, the calf reference section and the auxiliary component reference section are sleeved on the fixed rod and squeezed by the spring to avoid looseness, and at the same time, the threaded sleeve and the screw rod are provided to facilitate subsequent replacement of the spring, so that the device will not be unusable due to damage to the spring. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0015] Figure 1 It is a three-dimensional stereogram of the first embodiment of the utility model.
[0016] Figure 2 It is a front view of the first embodiment of the utility model.
[0017] Figure 3 The utility model Figure 2 Section view along line AA.
[0018] Figure 4 The utility model Figure 3 A partial enlarged view of point B in the middle.
[0019] Figure 5 It is a structural schematic diagram of the fixing rod in the first embodiment of the utility model.
[0020] Figure 6 It is a structural schematic diagram of the first disc in the first embodiment of the utility model.
[0021] Figure 7 It is a three-dimensional stereogram of the second embodiment of the utility model.
[0022] Figure 8 It is a rear view of the second embodiment of the utility model.
[0023] Fig. 9 It is a schematic structural diagram of the components of the second embodiment of the utility model after being decomposed.
[0024] 101-first subsection, 102-second subsection, 103-calf reference section, 104-auxiliary part reference section, 105-threaded sleeve, 106-fixed rod, 107-length scale, 108-holding ring, 109-screw, 110-base film, 111-spring, 112-angle dial, 113-first disc, 114-second disc, 115-third disc, 116-fourth disc, 117-bottom ring, 118-limiting block, 119-limiting groove, 120-semicircular concave surface, 121-semicircular convex surface, 201-anti-slip protrusion, 202-first holding surface, 203-second holding surface, 204-contact block, 205-anti-slip convex strip. DETAILED DESCRIPTION
[0025] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.
[0026] First embodiment:
[0027] See also Figure 1 to Figure 6 ,in Figure 1 It is a three-dimensional stereogram of the first embodiment of the utility model. Figure 2 This is a front view of the first embodiment of the utility model. Figure 3 The utility model Figure 2 The cross-sectional view along the AA line. Figure 4 The utility model Figure 3 A partial enlarged view of point B in the middle. Figure 5 This is a schematic diagram of the structure of the fixing rod in the first embodiment of the utility model. Figure 6It is a structural schematic diagram of the first disc in the first embodiment of the utility model.
[0028] The utility model provides a hip joint anteversion angle measuring device, comprising a first section 101, a second section 102, a calf reference section 103, an auxiliary component reference section 104, a threaded sleeve 105 and a fixing rod 106. The above-mentioned scheme solves the technical problem that after long-term use, due to different degrees of looseness between the first section 101, the second section 102, the calf reference section 103, the auxiliary component reference section 104 and the rotating member, the rotating member cannot clamp the first section 101, the second section 102, the calf reference section 103 and the auxiliary component reference section 104, thereby affecting subsequent use.
[0029] According to this specific embodiment, the calf reference portion 103 and the auxiliary part reference portion 104 are both provided with a length scale 107, one end of the threaded sleeve 105 is provided with a supporting ring 108, the head of the fixing rod 106 is provided with a screw 109, the tail of the fixing rod 106 is provided with a bottom plate 110, and the fixing rod 106 is sequentially sleeved with a spring 111, an angle dial 112, a first disc 113, a second disc 114, a third disc 115, a fourth disc 116 and a bottom ring 117 from the head to the tail, the first division 101, the second division 102, the calf reference portion 103 and the auxiliary part reference portion 104 are respectively slidably connected to the fixing rod 106 and are sequentially sleeved on the fixing rod 106, and the first division 101 is located between the angle dial 112 and the first disc 113, and the second division 102 is located between the first disc 113 and the fourth disc 116. The second disc 114 is located between the calf reference portion 103 and the third disc 115, the auxiliary part reference portion 104 is located between the third disc 115 and the third disc 115, the threaded sleeve 105 is threadedly connected to the screw rod 109 and is sleeved on the screw rod 109, and the spring 111 is supported between the supporting ring 108 and the angle dial 112. By sleeved the first division 101, the first division 101, the second division 102, the calf reference portion 103 and the auxiliary part reference portion 104 on the fixing rod 106 and squeezed by the spring 111, looseness can be avoided. At the same time, the arrangement of the threaded sleeve 105 and the screw rod 109 can facilitate the subsequent replacement of the spring 111, and the device will not be unusable due to damage to the spring 111.
[0030] Among them, the inner sides of the angle dial 112, the first disc 113, the second disc 114, the third disc 115 and the fourth disc 116 are all provided with a plurality of limit blocks 118, the outer side of the fixed rod 106 has a plurality of limit grooves 119, and the limit blocks 118 are located in the limit grooves 119. The setting of the limit blocks 118 and the limit grooves 119 can easily prevent the angle dial 112, the first disc 113, the second disc 114, the third disc 115 and the fourth disc 116 from rotating on the fixed rod 106.
[0031] Secondly, the first disk 113, the second disk 114, the third disk 115 and the fourth disk 116 have the same structure, and the end faces of the first disk 113, the second disk 114, the third disk 115 and the fourth disk 116 all have a semicircular concave surface 120 and a semicircular convex surface 121. The arrangement of the semicircular concave surface 120 and the semicircular convex surface 121 can facilitate the limitation of the rotation angle of the first division 101, the first division 101, the second division 102, the calf reference portion 103 and the auxiliary part reference portion 104, thereby avoiding angles outside the specified range.
[0032] When using the utility model, first, the model patient is placed in a lateral position. When the acetabulum side is replaced during hip replacement, the angle before the acetabulum prosthesis is measured: the bottom ring 117 is placed on the body surface just above the acetabulum, the calf reference portion 103 is parallel to the longitudinal axis of the trunk, and the angle α formed by the auxiliary component reference portion 104 and the calf reference portion 103 is adjusted to an angle range of 15°-20°. At this time, the acetabulum file handle is abducted 45° on the plane of the auxiliary component reference portion 104 perpendicular to the bed surface to grind the acetabulum, and the acetabulum prosthesis is placed according to the grinding angle. When replacing the femoral side, the knee joint is flexed 90°, and the femur is flexed and internally rotated. The assistant holds the calf model so that the calf model is perpendicular to the bed surface, and a small femoral medullary file is inserted. At the same time, the first subdivision 101 and the first subdivision 101 are connected to the second subdivision 103. Place two parallel intramedullary cavity files on the surface of the connecting handle to start measuring the anteversion angle of the femoral prosthesis: the calf reference part 103 is placed perpendicular to the first subdivision 101 and the second subdivision 102, adjust the auxiliary part reference part 104 to make it parallel to the calf model, and adjust the position of the intramedullary cavity file by rotation to make the angle α formed by the auxiliary part reference part 104 and the calf reference part 103 in the range of 15°-20°. According to the principle of right angle complement, the value of this angle is the same as the value of the anteversion angle. After the femoral intramedullary cavity tunnel is expanded along this angle, the femoral prosthesis is inserted along the tunnel. Through the right angle complement relationship in mathematical principles, a reliable device is provided to assist the key steps of the anteversion angle measurement in teaching, making the determination of the anteversion angle faster and simpler.
[0033] The second embodiment is:
[0034] Based on the first embodiment, please refer to Figure 7 to Figure 9 ,in Figure 7 It is a three-dimensional stereogram of the second embodiment of the utility model. Figure 8 It is a rear view of the second embodiment of the utility model. Fig. 9 It is a schematic structural diagram of the components of the second embodiment of the utility model after being decomposed.
[0035] The utility model provides a hip joint anteversion angle measuring device, which also includes a plurality of anti-slip protrusions 201 , a first abutting surface 202 and a second abutting surface 203 .
[0036] According to this specific embodiment, the plurality of anti-slip protrusions 201 are respectively bonded to the base film 110 and are located on the other end surface of the base film 110. By setting the anti-slip protrusions 201, excessive rotation of the fixing rod 106 can be avoided when the spring 111 is replaced, thereby facilitating the removal of the threaded sleeve 105 from the screw rod 109.
[0037] Among them, a contact block 204 is provided at one end of the first supporting surface 202 and the second supporting surface 203, the first supporting surface 202 is bonded to the first section 101 and is located on the back side of the first section 101, and the second supporting surface 203 is bonded to the second section 102 and is located on the back side of the second section 102.
[0038] A plurality of anti-skid ridges 205 are disposed on the outer side of the threaded sleeve 105 , and the anti-skid ridges 205 can facilitate the rotation of the threaded sleeve 105 , thereby improving the gripping force.
[0039] The anti-slip protrusion 201 , the first abutting surface 202 , the second abutting surface 203 , the contact block 204 and the anti-slip convex strip 205 are all made of natural rubber.
[0040] When using a hip joint anteversion angle measuring device of the present embodiment, the anti-slip protrusion 201 is provided to prevent the fixing rod 106 from rotating excessively when the spring 111 is replaced, thereby facilitating the removal of the threaded sleeve 105 from the screw rod 109. The anti-slip protrusion 205 facilitates the rotation of the threaded sleeve 105, thereby improving the gripping force.
[0041] What is disclosed above is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope covered by the utility model.
Claims
1. A hip joint anteversion angle measuring device, characterized in that: The invention comprises a first sub-section, a second sub-section, a calf reference section, an auxiliary component reference section, a threaded sleeve and a fixed rod, wherein the calf reference section and the auxiliary component reference section are both provided with length scales, one end of the threaded sleeve is provided with a holding ring, the head of the fixed rod is provided with a screw, the tail of the fixed rod is provided with a bottom plate, the fixed rod is provided with a spring, an angle dial, a first disc, a second disc, a third disc, a fourth disc and a bottom ring in sequence from the head to the tail, the first sub-section, the second sub-section, the calf reference section and the auxiliary component reference section are provided with a length scale ..., The reference parts are respectively slidably connected to the fixed rods and are sequentially sleeved on the fixed rods, and the first division is located between the angle dial and the first disc, the second division is located between the first disc and the second disc, the calf reference part is between the second disc and the third disc, the auxiliary part reference part is located between the third disc and the third disc, the threaded sleeve is threadedly connected to the screw rod and sleeved on the screw rod, and the spring is supported between the supporting ring and the angle dial.
2. The hip joint anteversion angle measuring device according to claim 1, characterized in that: The inner sides of the angle scale, the first disc, the second disc, the third disc and the fourth disc are all provided with a plurality of limit blocks, the outer side of the fixing rod is provided with a plurality of limit grooves, and the limit blocks are located in the limit grooves.
3. The hip joint anteversion angle measuring device according to claim 2, characterized in that: The first disk, the second disk, the third disk and the fourth disk have the same structure, and the end surfaces of the first disk, the second disk, the third disk and the fourth disk all have a semicircular concave surface and a semicircular convex surface.
4. The hip joint anteversion angle measuring device according to claim 3, characterized in that: The hip joint anteversion angle measuring device also includes a plurality of anti-skid protrusions, which are respectively bonded to the bottom plate and located on the other end surface of the bottom plate.
5. The hip joint anteversion angle measuring device according to claim 4, characterized in that: The hip joint anteversion angle measuring device also includes a first supporting surface and a second supporting surface, and one end of the first supporting surface and the second supporting surface are both provided with a contact block, the first supporting surface is bonded to the first section and is located on the back of the first section, and the second supporting surface is bonded to the second section and is located on the back of the second section.
6. The hip joint anteversion angle measuring device according to claim 5, characterized in that: The outer side of the threaded sleeve is provided with a plurality of anti-slip convex strips.
7. The hip joint anteversion angle measuring device according to claim 6, characterized in that: The anti-slip protrusion, the first abutting surface, the second abutting surface, the contact block and the anti-slip convex strip are all made of natural rubber.