Distal radioulnar joint stability measuring instrument

Abstract

The present invention provides a distal radioulnar joint stability measuring instrument, which relates to the technical field of clinical detection of the distal radioulnar joint. The distal radioulnar joint stability measuring instrument provided by the present invention comprises: a clamping assembly for clamping the distal radioulnar joint; a displacement sensor for detecting pressure on the distal radioulnar joint; and a pressure sensor for detecting displacement of the distal radioulnar joint. The distal radioulnar joint stability measuring instrument provided by the present invention can objectively measure the stability of the distal radioulnar joint.

Description

Technical Field

[0001] The invention relates to the technical field of clinical detection of distal radioulnar joint, in particular to a distal radioulnar joint stability measuring instrument. Background Art

[0002] Distal radioulnar joint instability is a common wrist disorder encountered clinically, which causes patients to experience wrist pain, decreased strength, and even inability to complete daily activities such as twisting a towel or opening a bottle cap, seriously affecting their work and life. The assessment of the stability of the distal radioulnar joint is not only important for clinicians to make a correct diagnosis, but also has important reference significance for the design of treatment plans. However, the distal radioulnar joint stress test commonly used in clinical judgment of distal radioulnar joint stability is that the doctor holds the patient's distal radius with one hand and the patient's distal ulna with the other hand, and applies stress in opposite directions to induce dorsal and volar separation of the distal radioulnar joint. By comparing with the healthy side, the conclusion of negative or positive distal radioulnar joint stress test is obtained.

[0003] However, the above tests are highly subjective, and the results of different doctors examining the same patient may be inconsistent. Even the results of the same doctor examining the same patient at different times may be different. Summary of the Invention

[0004] The purpose of the present invention is to provide a distal radioulnar joint stability measuring instrument, which can objectively measure the stability of the distal radioulnar joint.

[0005] In a first aspect, the present invention provides a distal radioulnar joint stability measuring instrument, comprising: a clamping assembly, a displacement sensor, and a pressure sensor;

[0006] The clamping assembly is used to clamp the distal radioulnar joint;

[0007] The pressure sensor is used to detect the pressure on the distal radioulnar joint;

[0008] The displacement sensor is used to detect the displacement of the distal radioulnar joint.

[0009] In combination with the first aspect, the present invention provides a first possible implementation of the first aspect, wherein the displacement sensor and the pressure sensor are respectively connected to a controller, and the controller is connected to a display.

[0010] In combination with the first aspect, the present invention provides a second possible implementation of the first aspect, wherein the clamping assembly includes: a clamping seat, a first clamping member, and a second clamping member;

[0011] The clamping seat comprises: a first clamping seat and a second clamping seat, wherein a first clamping area is formed between the first clamping seat and the first clamping member, and a second clamping area is formed between the second clamping seat and the second clamping member;

[0012] The first clamping area and the second clamping area jointly accommodate the wrist, and clamp the distal end of the radius between the first clamp seat and the first clamping member, and clamp the distal end of the ulna between the second clamp seat and the second clamping member.

[0013] In combination with the second possible implementation manner of the first aspect, the present invention provides a third possible implementation manner of the first aspect, wherein the clamping assembly includes a displacement adjustment member, and the first clamping seat and the second clamping seat are respectively movably connected to the transverse slide via the displacement adjustment member;

[0014] The displacement adjustment member is used to drive the first clamping seat and / or the second clamping seat to move either the distal end of the ulna or the distal end of the radius relative to the other in a direction perpendicular to the palm.

[0015] In combination with the second possible implementation of the first aspect, the present invention provides a fourth possible implementation of the first aspect, wherein the clamping assembly includes: a first slide rail and a second slide rail;

[0016] The first slide rail is connected to the first clamping seat, and the first clamping member is slidably connected to the first slide rail;

[0017] The second slide rail is connected to the second clamping seat, and the second clamping member is slidably connected to the second slide rail.

[0018] In combination with the fourth possible implementation of the first aspect, the present invention provides a fifth possible implementation of the first aspect, wherein the clamping assembly further includes: a first adjusting member and a second adjusting member;

[0019] The first adjusting member is cooperatively connected to the first clamping member, and the first adjusting member is used to drive the first clamping member to move along the first slide rail and lock the first clamping member;

[0020] The second adjusting member is cooperatively connected to the second clamping member, and the second adjusting member is used to drive the second clamping member to move along the second slide rail and lock the second clamping member.

[0021] In combination with the first aspect, the present invention provides a sixth possible implementation of the first aspect, wherein the distal radioulnar joint stability measuring instrument comprises: a first arm frame and a second arm frame connected to the first arm frame, the clamping assembly being connected to the second arm frame;

[0022] The first arm extends along a first direction, the second arm extends along a second direction, and the first direction is perpendicular to the second direction.

[0023] In combination with the sixth possible implementation of the first aspect, the present invention provides a seventh possible implementation of the first aspect, wherein the second arm comprises: a longitudinal support frame and a longitudinal slide, the longitudinal slide is slidably connected to the longitudinal support frame along the second direction, and the clamping assembly is connected to the longitudinal slide.

[0024] In combination with the seventh possible implementation of the first aspect, the present invention provides an eighth possible implementation of the first aspect, wherein the longitudinal slide is connected to a transverse slide rail, and the clamping assembly is slidably connected to the transverse slide rail along the first direction.

[0025] In combination with the eighth possible implementation of the first aspect, the present invention provides a ninth possible implementation of the first aspect, wherein the second arm further includes a third adjusting member, the third adjusting member is cooperatively connected to the clamping assembly, and the third adjusting member is used to drive the clamping assembly to move along the first direction and lock the clamping assembly.

[0026] The embodiments of the present invention bring the following beneficial effects: the distal radioulnar joint is clamped by a clamping assembly, the pressure on the distal radioulnar joint is detected by a pressure sensor, and the displacement of the distal radioulnar joint is detected by a displacement sensor, thereby avoiding the influence of the doctor's strength difference on the measurement result, and the stability of the distal radioulnar joint can be objectively measured.

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in related technologies, the following briefly introduces the drawings required for use in the specific embodiments or related technical descriptions. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 A schematic diagram of a displacement sensor, a pressure sensor, a controller, and a display of a distal radioulnar joint stability measuring instrument provided in an embodiment of the present invention;

[0030] Figure 2 A cross-sectional view of a clamping seat of a distal radioulnar joint stability measuring instrument provided by an embodiment of the present invention;

[0031] Figure 3 A schematic diagram of a clamping base of a distal radioulnar joint stability measuring instrument provided by an embodiment of the present invention;

[0032] Figure 4A schematic diagram of a clamping assembly, a first arm, and a second arm of a distal radioulnar joint stability measuring instrument provided by an embodiment of the present invention;

[0033] Figure 5 A schematic diagram of the clamping assembly and the second arm of the distal radioulnar joint stability measuring instrument provided in an embodiment of the present invention.

[0034] Icons: 100-clamping assembly; 110-clamping seat; 111-first clamping seat; 112-second clamping seat; 113-horizontal slide; 120-first clamping member; 130-second clamping member; 140-first slide rail; 150-second slide rail; 160-first adjusting member; 170-second adjusting member; 180-displacement adjusting member; 181-screw; 182-screw connecting plate; 200-displacement sensor; 300-pressure sensor; 400-display; 500-controller; 600-first arm; 610-strap; 700-second arm; 710-longitudinal support frame; 720-longitudinal slide; 730-horizontal slide; 740-third adjusting member; x-first direction; z-second direction. DETAILED DESCRIPTION

[0035] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0036] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second" and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. Physical quantities in formulas, unless separately marked, should be understood as basic quantities of the International System of Units, or derived quantities derived from basic quantities through mathematical operations such as multiplication, division, differentiation or integration.

[0037] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0038] Example 1

[0039] like Figure 1 、 Figure 2 and Figure 3 As shown, the distal radioulnar joint stability measuring instrument provided by an embodiment of the present invention includes: a clamping assembly 100, a displacement sensor 200 and a pressure sensor 300; the clamping assembly 100 is used to clamp the distal radioulnar joint; the pressure sensor 300 is used to detect the pressure on the distal radioulnar joint; the displacement sensor 200 is used to detect the displacement of the distal radioulnar joint.

[0040] In one embodiment, a displacement sensor 200 and a pressure sensor 300 are each connected to the clamping assembly 100. When the clamping assembly 100 clamps the wrist, the displacement sensor 200 detects the displacement of the distal ulna under pressure, and the pressure sensor 300 detects the pressure applied to the distal ulna. Alternatively, two displacement sensors 200 and two pressure sensors 300 may be provided, with one displacement sensor 200 detecting the displacement of the distal ulna and the other pressure sensor 300 detecting the displacement of the distal radius; and one pressure sensor 300 detecting the pressure applied to the distal ulna and the other pressure sensor 300 detecting the pressure applied to the distal radius.

[0041] In another embodiment, when the clamping assembly 100 clamps the wrist, the displacement sensor 200 and the pressure sensor 300 are respectively inserted between the distal end of the ulna and the clamping assembly 100. The displacement sensor 200 detects the displacement of the distal end of the ulna under pressure, and the pressure sensor 300 detects the pressure applied to the distal end of the ulna. Similarly, the displacement sensor 200 and the pressure sensor 300 can also be inserted between the distal end of the radius and the clamping assembly 100, and the displacement of the radius can be detected by the displacement sensor 200, thereby comparing the displacement of the ulna relative to the radius under the same pressure.

[0042] In the embodiment of the present invention, the displacement sensor 200 and the pressure sensor 300 are respectively connected to the controller 500 , and the controller 500 is connected to the display 400 .

[0043] Specifically, the controller 500 displays the pressure value of the ulna, the pressure value of the radius, the ulna displacement, and the radius displacement on the display 400 according to the information from the displacement sensor 200 and the pressure sensor 300 .

[0044] Furthermore, the clamping assembly 100 includes: a clamping seat 110, a first clamping member 120 and a second clamping member 130; the clamping seat 110 includes: a first clamping seat 111 and a second clamping seat 112, a first clamping area is formed between the first clamping seat 111 and the first clamping member 120, and a second clamping area is formed between the second clamping seat 112 and the second clamping member 130; the first clamping area and the second clamping area jointly accommodate the wrist, and enable the distal end of the radius to be clamped between the first clamping seat 111 and the first clamping member 120, and enable the distal end of the ulna to be clamped between the second clamping seat 112 and the second clamping member 130.

[0045] During use, the distal end of the radius is clamped together by the first clamping member 120 and the first clamping seat 111, and the distal end of the ulna is clamped together by the second clamping member 130 and the second clamping seat 112. The first clamping member 120 and the second clamping member 130 can be subjected to external forces respectively, so that the distal end of the ulna and the distal end of the radius are subjected to pressures of different magnitudes respectively.

[0046] Furthermore, the clamping assembly 100 includes a displacement adjustment member 180, and the first clamping seat 111 and the second clamping seat 112 are respectively movably connected to the transverse slide 113 through the displacement adjustment member 180; the displacement adjustment member 180 is used to drive the first clamping seat 111 and / or the second clamping seat 112 so that either the distal end of the ulna or the distal end of the radius moves relative to the other in a direction perpendicular to the palm.

[0047] Specifically, the displacement adjustment member 180 includes a screw 181 and a screw connecting plate 182. Two screws 181 and two screw connecting plates 182 are provided, one first clamping seat 111 is connected to the first slide rail 140, and the other screw connecting plate 182 is connected to the second clamping seat 112. The two screws 181 are respectively rotatably connected to the transverse slide 113, and the two screws 181 are matched with the two screw connecting plates 182 in a one-to-one correspondence. Rotating the two screws 181 separately can drive the first clamping seat 111 and the second clamping seat 112 to move along the axis of the screws 181. The screws 181 extend in a direction perpendicular to the palm, thereby causing the distal ends of the ulna and the distal ends of the radius to move relative to each other in a direction perpendicular to the palm. Rotating only one of the screws 181 can cause the corresponding first clamping seat 111 or second clamping seat 112 to move, thereby causing one of the distal ends of the ulna and the distal ends of the radius to move relative to the other. By adjusting the screw 181 to drive the distal end of the ulna and the distal end of the radius to move relative to each other, it can be suitable for patients whose distal end of the ulna has a larger range of motion than that of the distal end of the radius.

[0048] It should be noted that two pressure sensors 300 are provided: one pressure sensor 300 is positioned between the second clamping seat 112 and the distal end of the ulna, and the other pressure sensor 300 is positioned between the first clamping seat 111 and the distal end of the radius, thereby respectively measuring the pressures exerted on the distal ends of the ulna and radius. Alternatively, a single pressure sensor 300 may be provided, with the pressure sensor 300 positioned between the second clamping seat 112 and the distal end of the ulna to measure the pressure exerted on the distal end of the ulna, and the pressure sensor 300 positioned between the first clamping seat 111 and the distal end of the radius to measure the pressure exerted on the distal end of the radius. Similarly, two displacement sensors 200 can be provided, one displacement sensor 200 is connected to the first clamping seat 111, and the other displacement sensor 200 is connected to the second clamping seat 112. After the distal end of the ulna and the distal end of the radius are clamped respectively, the first clamping seat 111 can be moved relative to the second clamping seat 112 in a direction perpendicular to the palm by adjusting the screw 181, so that the displacement of the distal end of the ulna relative to the distal end of the radius can be detected by the displacement sensor 200.

[0049] Furthermore, the clamping assembly 100 includes: a first slide rail 140 and a second slide rail 150; the first slide rail 140 is connected to the first clamping seat 111, and the first clamping member 120 is slidably connected to the first slide rail 140; the second slide rail 150 is connected to the second clamping seat 112, and the second clamping member 130 is slidably connected to the second slide rail 150.

[0050] Specifically, the first slide rail 140 and the second slide rail 150 are respectively provided with slide grooves, the first clamping member 120 slides on the first slide rail 140, and the second clamping member 130 slides on the second slide rail 150, so that the distance between the first clamping member 120 and the first clamping seat 111 can be adjusted by sliding, and the distance between the second clamping member 130 and the second clamping seat 112 can be adjusted, thereby adjusting the clamping force of the distal end of the ulna and the distal end of the radius respectively.

[0051] Furthermore, the clamping assembly 100 also includes: a first adjusting member 160 and a second adjusting member 170; the first adjusting member 160 is cooperatively connected to the first clamping member 120, and the first adjusting member 160 is used to drive the first clamping member 120 to move along the first slide rail 140 and lock the first clamping member 120; the second adjusting member 170 is cooperatively connected to the second clamping member 130, and the second adjusting member 170 is used to drive the second clamping member 130 to move along the second slide rail 150 and lock the second clamping member 130.

[0052] Specifically, the first adjusting member 160 and the second adjusting member 170 both include a screw member, which is rotatably connected to the clamping seat 110 and is axially fixed relative to the clamping seat 110 by a retaining ring. The two screw members are matched and connected to the first clamping member 120 and the second clamping member 130 in a one-to-one manner. The first clamping member 120 and the second clamping member 130 can be driven to move by rotating the screw member, thereby adjusting the pressure of the first clamping member 120 and the second clamping member 130 on the wrist respectively.

[0053] In addition, in some embodiments, the first adjustment member 160 and the second adjustment member 170 can both adopt electric telescopic rods, and the two electric telescopic rods respectively drive the first clamping member 120 and the second clamping member 130 to clamp the wrist and clamp the distal end of the radius and the distal end of the ulna respectively.

[0054] like Figure 4 and Figure 5 As shown, the distal radioulnar joint stability measuring instrument includes: a first arm 600 and a second arm 700 connected to the first arm 600, and the clamping assembly 100 is connected to the second arm 700; the first arm 600 extends along a first direction x, and the second arm 700 extends along a second direction z, and the first direction x is perpendicular to the second direction z.

[0055] When performing distal radioulnar joint testing, the upper arm is placed on the first armrest 600, the arm is bent, and the wrist is clamped by the clamping assembly 100, so that the arm posture is fixed to prevent the arm state from affecting the test results.

[0056] In another embodiment, the first arm 600 is movably connected to the second arm 700, allowing the second arm 700 to swing about an axis parallel to the first direction x. The upper arm is fixed to the first arm 600, and the second arm 700 can swing forward or backward about an axis parallel to the first direction x. This allows the stability of the radioulnar joint to be measured when the forearm swings forward 90 degrees or backward 90 degrees, respectively. It should be noted that the second arm 700 is rotatably connected to the first arm 600 via a rotating shaft. A jackscrew is connected to the first arm 600, and the jackscrew abuts the second arm 700, allowing the second arm 700 to be locked at any angle after swinging.

[0057] Furthermore, the second arm 700 includes: a longitudinal support frame 710 and a longitudinal slide 720 . The longitudinal slide 720 is slidably connected to the longitudinal support frame 710 along the second direction z, and the clamping assembly 100 is connected to the longitudinal slide 720 .

[0058] Specifically, the longitudinal support frame 710 is provided with a slide groove extending along the second direction z, and the longitudinal support frame 710 is slidably connected to the slide groove. By adjusting the clamping assembly 100 to slide along the second direction z, the position of the clamping assembly 100 can be adjusted according to the length of the arm.

[0059] Furthermore, the longitudinal slide 720 is connected to the transverse slide rail 730 , and the clamping assembly 100 is slidably connected to the transverse slide rail 730 along the first direction x.

[0060] Specifically, the transverse slide rail 730 includes a guide rod extending along the first direction x, the guide rod is inserted into the through hole of the longitudinal slide 720, and the guide rod is fixedly connected to the clamping seat 110. The clamping seat 110 and the guide rod can be driven to slide together along the first direction x, thereby adjusting the position of the clamping assembly 100 in the first direction x.

[0061] Furthermore, the second arm 700 also includes a third adjustment member 740, which is coupled to the clamping assembly 100 and is used to drive the clamping assembly 100 to move along the first direction x and to lock the clamping assembly 100. The third adjustment member 740 includes a screw, which is rotatably coupled to the transverse slide 113. The transverse slide 113 is fixed axially relative to the screw via a retaining ring. The screw is coupled to the longitudinal slide 720. Rotating the screw can drive the clamping assembly 100 to move along the first direction x. The screw also has a self-locking function, which can lock the clamping base 110 in the first direction x.

[0062] Furthermore, a strap 610 is provided on the first arm support 600 for securing the upper arm. The strap 610 is positioned around the upper arm, with both ends connected via Velcro to prevent the upper arm from becoming loose. By securing the arm, the subject's position can be stabilized, thereby preventing the impact of positional changes on distal radioulnar joint stability. This in turn increases the repeatability of the test. By measuring and recording the distal radioulnar joint stability of the subject before and after treatment, the treatment effect can be objectively evaluated, avoiding the influence of the physician's subjective judgment.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A distal radioulnar joint stability measuring instrument, characterized in that: include: A clamping assembly (100), a displacement sensor (200), and a pressure sensor (300); The clamping assembly (100) is used to clamp the distal radioulnar joint; The pressure sensor (300) is used to detect the pressure exerted on the distal radioulnar joint; The displacement sensor (200) is used to detect the displacement of the distal radioulnar joint; The clamping assembly (100) comprises: a clamping seat (110), a first clamping member (120) and a second clamping member (130); The clamping seat (110) comprises: a first clamping seat (111) and a second clamping seat (112), wherein a first clamping area is formed between the first clamping seat (111) and the first clamping member (120), and a second clamping area is formed between the second clamping seat (112) and the second clamping member (130); The first clamping area and the second clamping area jointly accommodate the wrist, and the distal end of the radius is clamped between the first clamping seat (111) and the first clamping member (120), and the distal end of the ulna is clamped between the second clamping seat (112) and the second clamping member (130); The clamping assembly (100) includes a displacement adjustment member (180), and the first clamping seat (111) and the second clamping seat (112) are respectively movably connected to the transverse slide (113) via the displacement adjustment member (180); The displacement adjustment member (180) is used to drive the first clamping seat (111) and / or the second clamping seat (112) to move either the distal end of the ulna or the distal end of the radius relative to the other in a direction perpendicular to the palm; The clamping assembly (100) comprises: a first slide rail (140) and a second slide rail (150); The first slide rail (140) is connected to the first clamping seat (111), and the first clamping member (120) is slidably connected to the first slide rail (140); The second slide rail (150) is connected to the second clamping seat (112), and the second clamping member (130) is slidably connected to the second slide rail (150); The displacement adjustment member (180) comprises: a screw rod (181) and a screw rod connecting plate (182), wherein two screw rods (181) and two screw rod connecting plates (182) are respectively provided, one screw rod connecting plate (182) is connected to the first clamping seat (111), and the other screw rod connecting plate (182) is connected to the second clamping seat (112), the two screw rods (181) are respectively rotatably connected to the transverse slide (113), and the two screw rods (181) are matched with the two screw rod connecting plates (182) in a one-to-one correspondence, and the two screw rods (181) are respectively rotated to drive the first clamping seat (111) and the second clamping seat (112) to move along the axial direction of the screw rod (181), and the screw rod (181) extends in a direction perpendicular to the palm; The clamping assembly (100) further includes: a first adjusting member (160) and a second adjusting member (170); the first adjusting member (160) is cooperatively connected to the first clamping member (120), and the first adjusting member (160) is used to drive the first clamping member (120) to move along the first slide rail (140) and lock the first clamping member (120); the second adjusting member (170) is cooperatively connected to the second clamping member (130), and the second adjusting member (170) is used to drive the second clamping member (130) to move along the second slide rail (150) and lock the second clamping member (130); The distal radioulnar joint stability measuring instrument comprises: a first arm frame (600) and a second arm frame (700) connected to the first arm frame (600), the clamping assembly (100) being connected to the second arm frame (700); the first arm frame (600) extending along a first direction (x), the second arm frame (700) extending along a second direction (z), the first direction (x) being perpendicular to the second direction (z); The second arm (700) comprises: a longitudinal support frame (710) and a longitudinal slide (720), the longitudinal slide (720) being slidably connected to the longitudinal support frame (710) along the second direction (z), and the clamping assembly (100) being connected to the longitudinal slide (720); The longitudinal slide (720) is connected to the transverse slide rail (730), and the clamping assembly (100) is slidably connected to the transverse slide rail (730) along the first direction (x).

2. The distal radioulnar joint stability measuring instrument according to claim 1, characterized in that: The displacement sensor (200) and the pressure sensor (300) are respectively connected to a controller (500), and the controller (500) is connected to a display (400).

3. The distal radioulnar joint stability measuring instrument according to claim 1, characterized in that: The second arm (700) further includes a third adjusting member (740), wherein the third adjusting member (740) is connected to the clamping assembly (100) and is used to drive the clamping assembly (100) to move along the first direction (x) and to lock the clamping assembly (100).

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