Tool for measurement in artificial hip replacement

Abstract

The utility model discloses a tool for measurement in artificial hip joint replacement. The tool comprises an eccentric distance measuring assembly and a height measuring assembly arranged on the eccentric distance measuring assembly. The eccentric distance measuring assembly is in a T shape and comprises a transverse section and a vertical section arranged at one end of the transverse section in the length direction, the transverse section is provided with a first scale groove, and the bottom end of the vertical section is provided with an arc-shaped face tangent to the bottom face of the transverse section and matched with the arc face of the top end of the thighbone greater trochanter. The device can adapt to different conditions of different patients and improve the measurement accuracy during prosthesis mold testing in an operation, meanwhile, due to the determined right-angle relation among the transverse section, the vertical section and the measurement ruler, an operator can be prevented from finding a vertical line in the operation, the height of a rotation center can be directly measured, and the measurement accuracy is improved. The purpose of noninvasive measurement in an operation is achieved through arc-shaped surface positioning.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument technical field especially relates to a tool for measuring in artificial hip joint replacement. BACKGROUND

[0002] The statements herein merely provide background information related to the utility model and do not necessarily constitute the prior art.

[0003] In artificial hip joint replacement, how to determine the required femoral eccentricity and the height of the rotation center is very important. At present, the vernier caliper is generally used for measurement, but the existing vernier caliper can only measure the vertical line at the greater trochanter of the femur to determine the eccentricity, and the height of the rotation center can only be visually observed, which causes difficulties for precise operation in surgery. The inventors have noticed that similar patents have been invented to solve similar problems, but they all require intramedullary positioning or steel nail or kirschner wire positioning. For hip replacement, the invasive positioning operation in the operation is complex, time-consuming and laborious, and cannot be coordinated with the steps such as "trial fitting and prosthesis comparison" in the operation process. Invasive measurement also prolongs the operation time, which is not conducive to elderly patients and patients with high risk of anesthesia. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at the above-mentioned deficiencies and provides a tool for measuring in artificial hip joint replacement to achieve the purpose of non-invasive measurement in the operation.

[0005] To solve the above technical problems, the utility model adopts the following technical scheme: a tool for measuring in artificial hip joint replacement, comprising an eccentricity measuring assembly and a height measuring assembly arranged on the eccentricity measuring assembly.

[0006] The eccentricity measuring assembly is T-shaped, and comprises a horizontal section and a vertical section arranged at one end of the horizontal section in the length direction, a first scale groove is formed on the horizontal section, and an arc surface is arranged at the bottom end of the vertical section and is tangent to the bottom surface of the horizontal section and is matched with the arc surface of the top end of the greater trochanter of the femur.

[0007] The height measuring assembly comprises at least one measuring scale capable of sliding up and down and a sliding part for driving the measuring scale to move along the length direction of the horizontal section, and a second scale groove is formed on the side of the measuring scale away from the horizontal section.

[0008] Further, the sliding part comprises a sliding block sleeved on the measuring scale and a sliding rail for guiding the sliding block to move along the length direction of the horizontal section, the sliding rail is fixedly connected with the horizontal section, a sliding groove is formed on the sliding block for the up and down movement of the measuring scale, and a hollow hole is formed on the side of the sliding block away from the horizontal section and is communicated with the sliding groove, the hollow hole is used for observing the position of the second scale groove on the measuring scale.

[0009] Further, the first scale groove is arranged on both sides of the width direction of the transverse section, the number of the measuring scale is two, and the two measuring scales are arranged on both sides of the width direction of the transverse section respectively, and the top of the measuring scale is provided with a connecting assembly for synchronously moving the two measuring scales.

[0010] Further, the connecting assembly comprises a connecting plate, the top of the connecting plate is provided with a clamping block capable of moving along the length direction of the transverse section and abutting against the vertical section, and the top of the two measuring scales is fixedly connected with the connecting plate.

[0011] Further, the cross section of the sliding rail is T-shaped, one end of the sliding rail is fixedly provided with a fixed baffle for limiting the sliding block from separating from the sliding rail, the other end of the sliding rail is detachably provided with a movable baffle for limiting the sliding block from separating from the sliding rail, the bottom of the measuring scale is detachably provided with a limiting block capable of moving up and down along with the measuring scale, and the limiting block is used for limiting the measuring scale from separating from the sliding block.

[0012] The beneficial effects of the utility model lie in:

[0013] The utility model discloses a arc-shaped surface is arranged on the vertical section of eccentricity measuring assembly and is matched with the top arc surface of femoral greater trochanter, when detecting in operation, only need to abut the arc-shaped surface at the top arc surface of femoral greater trochanter first, and the angle of transverse section is adjusted slightly, makes the transverse section with the perpendicular of femoral anatomical axis after, through the measuring scale and moves to the prosthetic femoral rotation center along the length direction of transverse section, can calculate the eccentricity through reading the first scale groove, and then through the up and down sliding of measuring scale, makes the measuring scale close to the prosthetic femoral rotation center, can calculate the rotation center height through reading the second scale groove, not only can be adapted to the different conditions of different patients, improves the measurement precision when trying the model of prosthesis in operation, and because of the right angle relation between transverse section, vertical section and measuring scale, can avoid the vertical line of operator in operation, can directly measure the height of rotation center, realizes the purpose of noninvasive measurement in operation through the arc-shaped surface positioning. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 It is the operation schematic view of the utility model;

[0015] Fig. 2 It is the perspective view of the utility model.

[0016] In the drawing:

[0017] 1, eccentricity measuring assembly;11, transverse section;12, vertical section;

[0018] 2, height measuring assembly;21, measuring scale;22, sliding part;221, sliding block;222, sliding rail;

[0019] 3, connecting assembly; 31, connecting plate; 32, clamp block. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. The embodiments in the present application and the features in the embodiments can be combined with each other without conflict. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0021] Please refer to Figs. 1-2 The utility model discloses a kind of tools for measuring in artificial hip arthroplasty, including eccentricity measuring assembly 1 and the height measuring assembly 2 of setting on eccentricity measuring assembly 1;

[0022] Eccentricity measuring assembly 1 is T-shaped, eccentricity measuring assembly 1 includes horizontal section 11 and the vertical section 12 of setting in the length direction one end of horizontal section 11, first scale groove is opened in horizontal section 11, and the arc surface that is tangent with the bottom surface of horizontal section 11 and is adapted with the top end arc surface of greater trochanter of femur is provided in the bottom end of vertical section 12.

[0023] Height measuring assembly 2 includes at least one measuring scale 21 that can slide up and down and the sliding component 22 for driving measuring scale 21 along the length direction of horizontal section 11, and second scale groove is opened in the side of measuring scale 21 away from horizontal section 11.

[0024] The utility model discloses a kind of tools for measuring in artificial hip arthroplasty, including eccentricity measuring assembly 1 and the height measuring assembly 2 of setting on eccentricity measuring assembly 1;Eccentricity measuring assembly 1 is T-shaped, eccentricity measuring assembly 1 includes horizontal section 11 and the vertical section 12 of setting in the length direction one end of horizontal section 11, first scale groove is opened in horizontal section 11, and the arc surface that is tangent with the bottom surface of horizontal section 11 and is adapted with the top end arc surface of greater trochanter of femur is provided in the bottom end of vertical section 12.

[0025] In an embodiment, the sliding component 22 comprises a sliding block 221 sleeved on the measuring scale 21 and a sliding rail 222 for guiding the sliding block 221 to move along the length direction of the transverse section 11, the sliding rail 222 is fixedly connected with the transverse section 11, the sliding block 221 is provided with a sliding groove for the up-and-down movement of the measuring scale 21, and the sliding block 221 is provided with a hollow hole in communication with the sliding groove at the side away from the transverse section 11, the hollow hole is used for observing the position of the second scale groove on the measuring scale 21.

[0026] In this way, the surgical staff can conveniently observe the position of the second scale groove on the moving measuring scale 21 from the hollow hole, so as to achieve the purpose of measuring and quickly reading the detection result at the same time.

[0027] In an embodiment, the first scale groove is arranged on both sides of the transverse section 11 in the width direction, the number of the measuring scales 21 is two, and the two measuring scales 21 are respectively arranged on both sides of the transverse section 11 in the width direction, and the top end of the measuring scale 21 is provided with a connecting assembly 3 for synchronously moving the two measuring scales 21.

[0028] In this way, the detection data can be read without obstruction on both sides of the measuring tool, so as to adapt to the measurement and detection requirements of the left and right limbs of the patient.

[0029] It should be noted that the distance between the two measuring scales 21 is greater than the diameter of the femoral head connecting rod, so that the measuring scale 21 can avoid colliding with the femoral head connecting rod when moving to the rotation center of the femoral head, and it is also more convenient for the surgical staff to observe whether the measuring scale 21 moves to the rotation center marked on the femoral head connecting rod.

[0030] In an embodiment, the connecting assembly 3 comprises a connecting plate 31, the top end of the two measuring scales 21 is fixedly connected with the connecting plate 31, and the top of the connecting plate 31 is provided with a clamping block 32 capable of moving along the length direction of the transverse section 11 and abutting against the vertical section 12.

[0031] In this way, by placing the femoral head cut by the patient during the operation between the clamping block 32 and the vertical section 12, the diameter of the femoral head can be calculated by using the first scale groove when the measuring scale 21 moves along the length direction of the transverse section 11 and the clamping block 32 and the vertical section 12 abut against the femoral head, so as to meet the remaining measurement requirements during the operation.

[0032] In an embodiment, the sliding rail 222 is in T-shaped cross section, one end of the sliding rail 222 is fixedly provided with a fixed baffle for limiting the sliding block 221 from separating from the sliding rail 222, the other end of the sliding rail 222 is detachably provided with a movable baffle for limiting the sliding block 221 from separating from the sliding rail 222, and the bottom end of the measuring scale 21 is detachably provided with a limiting block capable of moving up and down with the measuring scale 21, the limiting block is used for limiting the measuring scale 21 from separating from the sliding block 221.

[0033] In this way, the movable baffle and the fixed baffle are used in cooperation to prevent the sliding block 221 from being separated from the slide rail 222, and the limiting block and the connecting plate 31 are used in cooperation to prevent the measuring scale 21 from being separated from the sliding block 221, so that the stability of the detection tool during detection is ensured, and after use, the movable baffle and the limiting block can be removed, so that the detection tool is separated into independent parts for cleaning and maintenance.

[0034] It should be noted that if the embodiments of the utility model have directionality indications (such as up, down, left, right, front, back, etc.), the directionality indications are only used to explain the relative position relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), if the specific posture changes, the directionality indications also change accordingly.

[0035] In addition, if the embodiments of the utility model have descriptions of "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled persons in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the utility model.

[0036] In addition, "multiple" refers to more than two.

[0037] The above is only the preferred embodiment of the utility model, and is not used to limit the utility model, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A tool for use in measuring in artificial hip replacement surgery, characterized in that: The eccentricity measuring assembly (1) and the height measuring assembly (2) arranged on the eccentricity measuring assembly (1); The eccentricity measuring assembly (1) is T-shaped, and comprises a horizontal section (11) and a vertical section (12) arranged at one end of the horizontal section (11) in the length direction; the horizontal section (11) is provided with a first scale groove; and the vertical section (12) is provided with an arc surface at the bottom end, which is tangent to the bottom surface of the horizontal section (11) and is adapted to the arc surface of the top end of the greater trochanter of the femur. The height measuring assembly (2) comprises at least one measuring scale (21) capable of sliding up and down and a sliding component (22) for driving the measuring scale (21) to move along the length direction of the horizontal section (11); and the side of the measuring scale (21) away from the horizontal section (11) is provided with a second scale groove.

2. The tool for measuring in artificial hip replacement according to claim 1, characterized in that: The sliding component (22) comprises a sliding block (221) sleeved on the measuring scale (21) and a sliding rail (222) for guiding the sliding block (221) to move along the length direction of the horizontal section (11); the sliding rail (222) is fixedly connected with the horizontal section (11); the sliding block (221) is provided with a sliding groove for the up and down movement of the measuring scale (21); and the side of the sliding block (221) away from the horizontal section (11) is provided with a hollow hole in communication with the sliding groove, which is used for observing the position of the second scale groove of the measuring scale (21).

3. The tool for measuring in artificial hip replacement according to claim 1, characterized in that: The horizontal section (11) is provided with the first scale groove on both sides in the width direction; the number of the measuring scales (21) is two; and the two measuring scales (21) are respectively located on both sides in the width direction of the horizontal section (11); and the top end of the measuring scale (21) is provided with a connecting assembly (3) for synchronously moving the two measuring scales (21).

4. The tool for measuring in artificial hip replacement according to claim 3, characterized in that: The connecting assembly (3) comprises a connecting plate (31); the top end of each of the two measuring scales (21) is fixedly connected with the connecting plate (31); and the connecting plate (31) is provided with a clamping block (32) at the top, which can move along the length direction of the horizontal section (11) and abut against the vertical section (12).

5. The tool for measuring in artificial hip replacement according to claim 2, characterized in that: The sliding rail (222) is T-shaped in cross section; one end of the sliding rail (222) is fixedly provided with a fixed baffle for limiting the sliding block (221) from separating from the sliding rail (222); the other end of the sliding rail (222) is detachably provided with a movable baffle for limiting the sliding block (221) from separating from the sliding rail (222); the bottom end of the measuring scale (21) is detachably provided with a limiting block capable of moving up and down with the measuring scale (21); and the limiting block is used for limiting the measuring scale (21) from separating from the sliding block (221).

Images