Tool for measuring abduction angle of acetabular cup and length of lower limb in hip replacement
By designing a tool for measuring the acetabular cup abduction angle and lower limb length during hip replacement surgery, and using a dial and scale lines to measure anatomical landmarks preoperatively, the problem of inaccurate assessment of the acetabular cup abduction angle and lower limb length caused by the small intraoperative fluoroscopic field of view was solved, achieving precise intraoperative measurement and improving surgical outcomes.
Patent Information
- Application Number
- CN202422933876.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-29
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2034-11-29
AI Technical Summary
In total hip arthroplasty, the small field of view during intraoperative C-arm fluoroscopy makes it impossible to accurately assess the acetabular cup abduction angle and the length of the operated lower limb, thus affecting the surgical outcome.
Design a tool for measuring the acetabular cup abduction angle and lower limb length during hip replacement surgery, including a transparent positioning ruler and a fixation device. The tool uses anatomical landmarks to measure the angles and distances between connecting lines preoperatively, and uses a dial and scale lines to accurately measure the acetabular cup abduction angle and lower limb length during surgery.
Under intraoperative fluoroscopic conditions, the abduction angle of the acetabular cup and the length of the lower limb can be accurately measured, reducing the prosthesis dislocation rate, prolonging the prosthesis lifespan, and improving the patient's postoperative lower limb walking comfort.
Smart Images
Figure CN223668123U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of measuring tools, and particularly relates to a hip joint replacement intraoperative acetabular cup abduction angle and lower limb length measurement tool. BACKGROUND
[0002] In order to reduce the artificial total hip replacement postoperative prosthesis dislocation rate, prolong the service life of the prosthesis, and improve the comfort of the patient's postoperative lower limb walking, many doctors often use the bedside X-ray perspective method to evaluate the placement angle of the acetabular cup and the length of the lower limb during the total hip replacement surgery. However, when C-arm perspective is performed during the operation, the small perspective field often cannot accurately find the common anatomical landmarks, which affects the evaluation of the acetabular cup abduction angle and the length of the lower limb on the surgical side. SUMMARY
[0003] In view of the above problems, the utility model aims to provide a hip joint replacement intraoperative acetabular cup abduction angle and lower limb length measurement tool to solve the problems raised in the background.
[0004] To achieve the above purpose, the utility model adopts the following technical scheme: a hip joint replacement intraoperative acetabular cup abduction angle and lower limb length measurement tool, comprising a transparent positioning ruler and a fixing piece, and the fixing piece is composed of a fixing buckle A, a fixing buckle B and a connecting belt, a first moving groove and a second moving groove are formed on the positioning ruler, a first scale line and a first degree disc are printed on one side of the positioning ruler, and a second scale line and a second degree disc are printed on the other side of the positioning ruler, a first screw and a second screw are arranged on the positioning ruler, the first screw is located at the center point of the first degree disc, and the second screw is located at the center point of the second degree disc, a first measuring ruler is movably connected to the first moving groove, and a second measuring ruler is movably connected to the second moving groove, a third scale line and a fourth scale line are respectively printed on the first measuring ruler and the second measuring ruler, the first screw is screwed through a first angle ruler and a first hand screw nut, and the second screw is screwed through a second angle ruler and a second hand screw nut, a plurality of clamping holes are formed on the first angle ruler and the second angle ruler, and the fixing piece is used to penetrate the clamping holes to fix the intersection of the first angle ruler and the second angle ruler.
[0005] The utility model has the advantages that: by using the measurement tool on the pelvic plain film before the operation, the angles of the lines are accurately and quickly measured by using the corresponding anatomical landmarks, and under the condition that only part of the anatomical landmarks can be exposed during the intraoperative perspective, the acetabular cup abduction angle and the length of the lower limb on the surgical side and the length of the lower limb on the healthy side can still be accurately measured.
[0006] In order to facilitate the confirmation of the angle values between the first angle ruler and the positioning ruler and the angle values between the second angle ruler and the positioning ruler:
[0007] As a further improvement of the above technical solution: the first dial and the second dial are respectively located above the middle part of the two sides of the positioning ruler, and are used to read the included angle value between the first angle ruler and the positioning ruler and the included angle value between the second angle ruler and the positioning ruler.
[0008] The beneficial effect of the improvement is that by setting the first dial and the second dial, the included angle value between the first angle ruler or the second angle ruler and the positioning ruler can be read and confirmed when the first angle ruler or the second angle ruler is rotated.
[0009] In order to facilitate displacement adjustment and reading of the displacement value of the first measuring ruler and the second measuring ruler:
[0010] As a further improvement of the above technical solution: the first moving groove and the second moving groove are respectively horizontally located on the two sides of the positioning ruler, and the first measuring ruler and the second measuring ruler are respectively vertically located in the first moving groove and the second moving groove, and the first scale line and the second scale line are respectively printed on the front end of the positioning ruler above the first moving groove and the second moving groove, and the third scale line and the fourth scale line are respectively printed on the front end of the first measuring ruler and the second measuring ruler.
[0011] The beneficial effect of the improvement is that by adjusting the use position of the first measuring ruler or the second measuring ruler, the vertical distance between the lower edge of the femoral trochanter on the surgical side and the positioning ruler can be measured using the first measuring ruler or the second measuring ruler, and the difference between the length of the lower limb on the surgical side and the length of the healthy side can be evaluated as a reference, and the first scale line and the second scale line can be used to read the movement distance of the first measuring ruler or the second measuring ruler.
[0012] In order to facilitate further position fixing of the first angle ruler and the second angle ruler:
[0013] As a further improvement of the above technical solution: the plurality of clamping holes are equidistantly arranged along the length direction of the first angle ruler and the second angle ruler.
[0014] The beneficial effect of the improvement is that after the first hand screw nut and the second hand screw nut are used to preliminarily fix the first angle ruler and the second angle ruler, only the clamping holes overlapped at the intersection of the first angle ruler and the second angle ruler need to be penetrated by the fixing buckle B, and the first angle ruler and the second angle ruler can be further fixed in position under the cooperation of the fixing buckle B and the fixing buckle A.
[0015] In order to facilitate the formation of a complete fixing member to increase the convenience of use:
[0016] As a further improvement of the above technical solution: the fixing buckle A is connected with the fixing buckle B through a connecting belt.
[0017] The improved beneficial effect is that the connection belt can connect the fixing buckle A and the fixing buckle B to form a complete fixing part, thereby increasing the convenience of taking and using. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 It is a front end structure schematic diagram of the utility model;
[0019] Figure 2 It is a rear end structure schematic diagram of the utility model;
[0020] Figure 3 It is a measuring ruler displacement adjustment and angle ruler angle adjustment structure schematic diagram of the utility model;
[0021] Figure 4 It is a Figure 1 It is a partial enlarged view of A in the utility model;
[0022] Figure 5 It is a Figure 3 It is a partial enlarged view of B in the utility model;
[0023] Figure 6 It is a fixing part structure schematic diagram of the utility model;
[0024] In the figure: 1, positioning ruler; 2, fixing part; 201, fixing buckle A; 202, fixing buckle B; 203, connection belt; 3, first moving groove; 4, second moving groove; 5, first scale line; 6, first degree disc; 7, second scale line; 8, second degree disc; 9, first screw; 10, first measuring ruler; 11, second measuring ruler; 12, third scale line; 13, fourth scale line; 14, first angle ruler; 15, first hand screw nut; 16, second angle ruler; 17, clamping hole. DETAILED DESCRIPTION
[0025] In order to make the skilled in the art better understand the technical scheme of the utility model, the utility model is described in detail below in combination with the drawings, and the description in this part is only exemplary and explanatory, and should not have any limiting effect on the protection scope of the utility model.
[0026] As Figures 1-6The utility model discloses a hip arthroplasty intraoperative acetabular cup abduction angle, lower limb length measurement tool, including transparent positioning ruler 1 and fixed part 2, and fixed part 2 is by fixed buckle A201, fixed buckle B202 and connecting band 203 constitutes, first mobile groove 3 and second mobile groove 4 are seted up on the positioning ruler 1, and the first degree line 5 with first degree plate 6 are printed on the one side of positioning ruler 1, and the second degree line 7 with second degree plate 8 are printed on the other side of positioning ruler 1, first screw 9 and second screw are provided on the positioning ruler 1, and first screw 9 is located the first degree plate 6 center point, and second screw is located the second degree plate 8 center point, first measuring scale 10 is movably connected with first mobile groove 3, and second measuring scale 11 is movably connected with second mobile groove 4, third degree line 12 and fourth degree line 13 are printed on first measuring scale 10 and second measuring scale 11 respectively, first screw 9 is threaded through first angle ruler 14 and first hand screw nut 15, and second screw is threaded through second angle ruler 16 and second hand screw nut, a plurality of clamping holes 17 are formed on first angle ruler 14 and second angle ruler 16, and fixed part 2 is used to pass through clamping hole 17 to fix the intersection of first angle ruler 14 and second angle ruler 16, by using the measuring tool on the preoperative pelvic plain film, the included angle of each connecting line is accurately and quickly measured by using corresponding anatomical landmarks, under the condition that only part of anatomical landmarks can be exposed during the intraoperative perspective, the abduction angle of acetabular cup, the length of operative side lower limb and healthy side lower limb can still be accurately measured, first degree plate 6 and second degree plate 8 are located above the two sides of the middle part of the positive end of positioning ruler 1 respectively, and are used to read the included angle value between first angle ruler 14 and positioning ruler 1 and the included angle value between second angle ruler 16 and positioning ruler 1, by the establishment of first degree plate 6 and second degree plate 8, the included angle value between first angle ruler 14 or second angle ruler 16 and positioning ruler 1 can be read and confirmed when first angle ruler 14 or second angle ruler 16 is rotated, first mobile groove 3 and second mobile groove 4 are horizontally located on the two sides of positioning ruler 1 respectively, and first measuring scale 10 and second measuring scale 11 are vertically located in first mobile groove 3 and second mobile groove 4 respectively, and first degree line 5 and second degree line 7 are printed on the positive end of positioning ruler 1 above first mobile groove 3 and second mobile groove 4 respectively, and third degree line 12 and fourth degree line 13 are printed on the positive end of first measuring scale 10 and second measuring scale 11 respectively, by adjusting the use position of first measuring scale 10 or second measuring scale 11, the vertical distance of first measuring scale 10 or second measuring scale 11 from positioning ruler 1 can be conveniently measured, and then the difference between the length of operative side lower limb and healthy side lower limb is evaluated, and the establishment of first degree line 5 and second degree line 7 can read the moving distance of first measuring scale 10 or second measuring scale 11, a plurality of clamping holes 17 are equidistantly formed along the length direction of first angle ruler 14 and second angle ruler 16, after first hand screw nut 15 and second hand screw nut are used,Only need to use the fixed buckle B202 through the first angle ruler 14 and the second angle ruler 16 at the intersection of the overlapping card hole 17, that is, the further position fixing of the first angle ruler 14 and the second angle ruler 16 can be carried out under the cooperation of the fixed buckle B202 and the fixed buckle A201, the fixed buckle A201 is connected with the fixed buckle B202 through the connecting belt 203, and the fixed buckle A201 and the fixed buckle B202 are connected to form a complete fixing piece 2 through the establishment of the connecting belt 203, so that the convenience of taking and using is increased.
[0027] The working principle of the utility model is: before operation, the first angle ruler 14 and the second angle ruler 16 are used to record the included angle of the outer upper edge of the acetabulum, the lower edge of the tear drop and the line connecting the bilateral ischial tuberosity, the first measuring ruler 10 and the second measuring ruler 11 are used to record the vertical distance from the line connecting the bilateral ischial tuberosity to the lower edge of the contralateral femoral lesser trochanter, when the acetabulum is seen in the operation, the angle between the first angle ruler 14 and the second angle ruler 16 and the positioning ruler 1 is adjusted to the measured value before operation, the first angle ruler 14 and the second angle ruler 16 are overlapped with the line connecting the outer upper edge of the acetabulum and the lower edge of the tear drop, then the length difference of the lower limbs on the operation side is evaluated by observing the first measuring ruler 10 and the second measuring ruler 11, the abduction angle of the acetabular cup is evaluated by observing the included angle of the line connecting the outer upper edge of the acetabulum and the lower edge of the tear drop, the outer upper edge of the acetabular cup and the inner lower edge, the shortcoming that the small field of view in the operation perspective cannot accurately find the anatomical landmarks and then measure the abduction angle of the acetabulum and the length difference of the lower limbs on the operation side and the contralateral lower limb is effectively made up.
[0028] By using the measuring tool on the preoperative pelvic plain film, the angles of each connecting line are accurately and quickly measured by using corresponding anatomical markers, so that the abduction angle of the acetabular cup and the length of the lower limb on the surgical side and the length of the lower limb on the healthy side can be accurately measured under the condition that only part of the anatomical markers can be exposed during the intraoperative fluoroscopy, the angle value between the first angle scale 14 or the second angle scale 16 and the positioning scale 1 can be read and confirmed when the first angle scale 14 or the second angle scale 16 is rotated, the vertical distance between the first measuring scale 10 or the second measuring scale 11 and the positioning scale 1 can be measured by adjusting the use position of the first measuring scale 10 or the second measuring scale 11, thereby providing a reference for evaluating whether there is a difference in the length of the lower limb on the surgical side and the length of the lower limb on the healthy side, and the first scale line 5 and the second scale line 7 are provided to read the movement distance of the first measuring scale 10 or the second measuring scale 11, after the first hand screw nut 15 and the second hand screw nut are used to preliminarily fix the first angle scale 14 and the second angle scale 16, only the fixing buckle B202 is needed to penetrate the overlapping clamping hole 17 at the intersection of the first angle scale 14 and the second angle scale 16, so that the first angle scale 14 and the second angle scale 16 can be further positionally fixed under the cooperation and connection of the fixing buckle B202 and the fixing buckle A201, and the connection belt 203 is provided to simultaneously connect the fixing buckle A201 and the fixing buckle B202 to form a complete fixing member 2, thereby increasing the convenience of taking and using.
[0029] It should be noted that in this document, the terms "comprising", "containing", or any other similar term are intended to encompass non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or inherent to such a process, method, article or device.
[0030] The principle and implementation mode of the present application are described by using specific examples in this document, and the above example is only used to help understand the method and core idea of the present application. The above description is only the preferred implementation mode of the present application, and it should be pointed out that due to the limited expression, there are infinite specific structures objectively, and for ordinary skilled persons in the technical field, some improvements, decorations or changes can be made without departing from the principle of the present application, and the above technical features can be combined in a proper way, and these improvements, decorations, changes or combinations, or the direct application of the concept and technical scheme of the present application to other occasions without improvement, should be regarded as the protection scope of the present application.
Claims
1. A hip joint replacement intraoperative acetabular cup abduction angle and lower limb length measurement tool, comprising a transparent positioning ruler (1) and a fixing piece (2), and the fixing piece (2) is composed of a fixing buckle A (201), a fixing buckle B (202) and a connecting belt (203), characterized in that: The positioning ruler (1) is provided with a first moving groove (3) and a second moving groove (4), the positioning ruler (1) is provided with a first scale line (5) and a first dial (6) on one side, and the positioning ruler (1) is provided with a second scale line (7) and a second dial (8) on the other side, the positioning ruler (1) is provided with a first screw (9) and a second screw, the first screw (9) is located at the center point of the first dial (6), and the second screw is located at the center point of the second dial (8), the first moving groove (3) is movably connected with a first measuring ruler (10), and the second moving groove (4) is movably connected with a second measuring ruler (11), the first measuring ruler (10) and the second measuring ruler (11) are respectively provided with a third scale line (12) and a fourth scale line (13), the first screw (9) penetrates a first angle ruler (14) and a first hand nut (15) and is screwed, and the second screw penetrates a second angle ruler (16) and a second hand nut and is screwed, the first angle ruler (14) and the second angle ruler (16) are provided with a plurality of clamping holes (17), and the fixing piece (2) is used for penetrating the clamping holes (17) to fix the intersection of the first angle ruler (14) and the second angle ruler (16).
2. The tool for measuring the abduction angle of the acetabular cup and the length difference of lower limbs in hip arthroplasty according to claim 1, characterized in that: The first dial (6) and the second dial (8) are located above the two sides of the middle part of the positioning ruler (1), and are used for reading the included angle value between the first angle ruler (14) and the positioning ruler (1) and the included angle value between the second angle ruler (16) and the positioning ruler (1).
3. The tool for measuring the abduction angle of the acetabular cup and the length difference between the lower limbs according to claim 1, characterized in that: The first moving groove (3) and the second moving groove (4) are horizontally located on the two sides of the positioning ruler (1), the first measuring ruler (10) and the second measuring ruler (11) are vertically located in the first moving groove (3) and the second moving groove (4) respectively, and the first scale line (5) and the second scale line (7) are respectively marked on the positioning ruler (1) of the upper side of the first moving groove (3) and the second moving groove (4), and the third scale line (12) and the fourth scale line (13) are respectively marked on the first measuring ruler (10) and the second measuring ruler (11).
4. The intraoperative acetabular cup abduction angle and lower extremity length measurement tool of claim 1, wherein: A plurality of clamping holes (17) are equidistantly provided along the length direction of the first angle ruler (14) and the second angle ruler (16).
5. The intraoperative hip resurfacing femoral cup version and leg length measurement tool of claim 1, wherein: The fixed buckle A (201) is connected with the fixed buckle B (202) through the connecting belt (203).