CN112826506A - Axial displacement measuring equipment for knee joint cruciate ligament injury - Google Patents
Axial displacement measuring equipment for knee joint cruciate ligament injury Download PDFInfo
- Publication number
- CN112826506A CN112826506A CN202110176968.XA CN202110176968A CN112826506A CN 112826506 A CN112826506 A CN 112826506A CN 202110176968 A CN202110176968 A CN 202110176968A CN 112826506 A CN112826506 A CN 112826506A
- Authority
- CN
- China
- Prior art keywords
- guide plate
- displacement sensor
- cruciate ligament
- axial displacement
- ligament injury
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
- A61B5/11—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb
- A61B5/1121—Determining geometric values, e.g. centre of rotation or angular range of movement
- A61B5/1122—Determining geometric values, e.g. centre of rotation or angular range of movement of movement trajectories
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
- A61B5/11—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/45—For evaluating or diagnosing the musculoskeletal system or teeth
- A61B5/4533—Ligaments
Abstract
The invention relates to the technical field of axial displacement measurement, and discloses axial displacement measurement equipment for knee joint cruciate ligament injury, which comprises: a guide plate, a displacement sensor; the lower end of the guide plate is fixed on the shank and is tightly attached to the shank; the upper end of the guide plate is fixed on the femoral condyle, and the upper end of the guide plate deviates from the patella and the tibia by a certain distance through a supporting device arranged on the upper end of the guide plate, so that a movable space is reserved for the tibia when the axial displacement measurement is carried out; the displacement sensor is arranged on the guide plate, and during measurement, the front end of the displacement sensor is propped against the tibial tubercle. The tibial anterior displacement and dislocation reduction speed and amplitude data under different flexion and extension and varus and valgus conditions can be measured, quantitative measurement is carried out on cruciate ligament injury, and a doctor is assisted in diagnosing a patient.
Description
Technical Field
The invention relates to the technical field of axial displacement measurement, in particular to axial displacement measurement equipment for knee joint cruciate ligament injury.
Background
The cruciate ligament of the knee joint is a cruciate ligament positioned in the knee joint, so the cruciate ligament is also called as a cruciate ligament and positioned slightly behind the center of the knee joint, and is mainly used for stabilizing the front and back structures of the knee joint and avoiding the unstable front and back movement of the knee joint. In daily life, after the injury of external force around the knee joint part is easily caused, the injury of the cruciate ligament of the knee joint is caused, obvious swelling and pain of the knee joint part can be caused, and the stability of the knee joint part can be influenced. Therefore, after the cruciate ligament injury of the knee joint of the patient occurs, the patient must be treated in time to recover the stability of the knee joint part and avoid the influence on the function of the knee joint part caused by the instability of the knee joint in the later period.
Knee joint cruciate ligament injury is a more common sports injury in clinic, and currently, the diagnosis of the knee joint cruciate ligament injury is mainly performed through a manual examination (as shown in fig. 1) in an outpatient clinic, but the methods lack quantitative indexes which can be compared and counted, and the examination results are greatly influenced by the experience and the exertion of an examiner and have no uniform standard. In addition, current cruciate ligament reconstructive surgery, which is becoming mature, still lacks an effective, quantitative method of assessing ligament stability post-operatively.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide an axial displacement measurement device for knee joint cruciate ligament injury, which can measure the anterior movement, dislocation reduction speed and amplitude data of tibia under different flexion and extension and varus and valgus conditions, perform quantitative measurement for cruciate ligament injury, and assist doctors in diagnosing patients.
The above object of the present invention is achieved by the following technical solutions:
an axial displacement measurement device for cruciate ligament injury in a knee joint, comprising: a guide plate, a displacement sensor;
the lower end of the guide plate is fixed on the shank and is tightly attached to the shank;
the upper end of the guide plate is fixed on the femoral ankle, and the upper end of the guide plate deviates from the patella and the tibia by a certain distance through a supporting device arranged on the upper end of the guide plate, so that a movable space is reserved for the tibia when the axial displacement measurement is carried out;
the displacement sensor is arranged on the guide plate, and during measurement, the front end of the displacement sensor is propped against the tibial tubercle.
Further, the axial displacement measuring device for knee joint cruciate ligament injury still includes: a position tracker;
the position tracker, further comprising: a first position tracker and a second position tracker;
the first position tracker is fixed at the front end of the displacement sensor, and the second position tracker is fixed on the femur;
the first position tracker is matched with the second position tracker to acquire the bending angle of the tibia and the acceleration of the tibia during movement through the first position tracker.
Further, the supporting device is a knee joint jaw; the knee joint clamping jaws are fixedly connected with the upper ends of the guide plates; during measurement, the knee joint clamping jaws are clamped on the patella.
Further, the displacement sensor is movably connected with the guide plate; adjusting the position of the displacement sensor along the up-down direction of the guide plate so that the displacement sensor is positioned at the tibial tubercle; adjusting the position of the displacement sensor in the anterior-posterior direction of the guide plate so that the anterior end of the displacement sensor abuts the tibial tubercle.
Further, the axial displacement measuring device for knee joint cruciate ligament injury still includes: a first knob and a second knob; the first knob is used for adjusting the position of the displacement sensor along the up-down direction of the guide plate; and the second knob is used for adjusting the position of the displacement sensor along the front-back direction of the guide plate.
Further, the axial displacement measuring device for knee joint cruciate ligament injury still includes: a tibial strap; the tibia bandage is arranged at the lower end of the guide plate and used for fixing the lower end of the guide plate on the shank.
Further, the axial displacement measuring device for knee joint cruciate ligament injury still includes: an upper fixing strap; the upper fixing strap is tied on the femur, the front end of the upper fixing strap is connected with the upper end of the guide plate, and the joint of the upper fixing strap and the guide plate can move in six degrees of freedom after connection.
Further, the front end of the upper fixing belt is made of elastic materials, so that the subsequent measuring action has operability.
Further, the axial displacement measuring device for knee joint cruciate ligament injury still includes: an instrument panel; the instrument panel is used for acquiring the measurement data of the displacement sensor and the position tracker and displaying the measurement data on the instrument panel.
Furthermore, the instrument panel is hung at any position of the axial displacement measuring equipment, or is independently arranged and connected in any one of a wired mode and a wireless mode.
Compared with the prior art, the invention has the beneficial effects that:
(1) by providing an axial displacement measurement device for cruciate ligament injury in a knee joint, comprising: a guide plate, a displacement sensor; the lower end of the guide plate is fixed on the shank and is tightly attached to the shank; the upper end of the guide plate is fixed on the femoral ankle, and the upper end of the guide plate deviates from the patella and the tibia by a certain distance through a supporting device arranged on the upper end of the guide plate, so that a movable space is reserved for the tibia when the axial displacement measurement is carried out; the displacement sensor is arranged on the guide plate, and during measurement, the front end of the displacement sensor is propped against the tibial tubercle. Above-mentioned technical scheme, through a measuring equipment, when the cruciate ligament damage, carry out the quantization measurement to the distance of shin bone antedisplacement through displacement sensor, according to the antedisplacement distance data of specific quantization, the accurate degree of judging the cruciate ligament damage.
(2) By adding two position trackers into the axial movement measuring equipment and acquiring the position information of the two position trackers simultaneously, the bending angle of the tibia relative to the straightening state can be calculated. Further, through a position tracker provided on the tibia, the acceleration of the movement of the tibia at the time of measurement can be acquired. The tibial dislocation reduction speed and amplitude data can be acquired through the acceleration and the angle, the cruciate ligament injury degree can be judged in an auxiliary mode, and the accurate operation of an operator can be guided according to the acceleration and angle information displayed on the instrument panel.
Drawings
FIG. 1 is a schematic diagram of a manual inspection in the prior art;
FIG. 2 is a schematic view of an axial displacement measurement device without a position tracker according to the present invention;
FIG. 3 is a schematic view of an axial displacement measurement device with a position tracker according to the present invention.
Reference numerals
1. A guide plate;
2. a displacement sensor;
3. a position tracker; 31. a first position tracker; 32. a second position tracker;
4. a knee joint jaw;
5. a first knob;
6. a second knob;
7. a tibial strap;
8. an upper fixing strap;
9. an instrument panel.
Detailed Description
Unless otherwise defined, technical or scientific terms used herein in the specification and claims should have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings. It is noted that in the detailed description of these embodiments, in order to provide a concise description, all features of an actual implementation may not be described in detail.
Example one
As shown in fig. 2, the present embodiment provides an axial displacement measuring apparatus for cruciate ligament injury of knee joint, including: a guide plate 1, a displacement sensor 2;
the lower end of the guide plate 1 is fixed on the shank and is tightly attached to the shank; the upper end of the guide plate 1 is fixed on a femoral ankle, and the upper end of the guide plate 1 deviates from the patella and the tibia by a certain distance through a supporting device arranged on the upper end of the guide plate 1, so that a movable space is reserved for the tibia when axial movement measurement is carried out; the displacement sensor 2 is vertically arranged on the guide plate 1, and during measurement, the front end of the displacement sensor 2 is propped against the tibial tubercle.
Specifically, in the present embodiment, before measuring the injury of the cruciate ligament of the knee joint, the axial movement measuring device needs to be fixed first, so that the axial movement measuring device is not moved while measuring. The specific fixing mode is as follows:
the lower end of the guide plate 1 is fixed on a proper position of the shank, and the upper end of the guide plate 1 is fixed on the femoral condyle, so that the axial movement measuring equipment is fixed in position, and the proximal end of the tibia can move freely during measurement. After the position of the guide plate 1 is fixed, the position of the displacement sensor 2 needs to be adjusted due to individual difference, the displacement sensor 2 is adjusted to the tibial tubercle (because there is no way to rightly point the tibial tubercle, the general tibial tubercle can be slightly deviated from a small distance to be set, such as 2CM, but in order to enable the measurement data to be accurate, the tibial tubercle needs to be infinitely close to as far as possible), and the distance before and after adjustment enables the top point of the displacement sensor 2 to just abut against the tibia, and the position is set to be the current measurement displacement zero point.
Further, the supporting device disposed at the upper end of the guide plate 1 in this embodiment is a knee joint jaw 4; the knee joint clamping jaws 4 are fixedly connected with the upper end of the guide plate 1; during measurement, the knee joint clamping jaws 4 are clamped on the patella.
Further, the displacement sensor 2 is movably connected with the guide plate 1; adjusting the position of the displacement sensor 2 along the up-down direction of the guide plate 1, so that the displacement sensor 2 is positioned at a preset fixed distance below the tibial tubercle; the position of the displacement sensor 2 is adjusted in the anteroposterior direction of the guide plate 1 so that the front end of the displacement sensor 2 is abutted under the tibial tubercle.
Further, in order to realize the free adjustment of the free sensor of the displacement sensor 2, the method further comprises the following steps: a first knob 5 and a second knob 6; the first knob 5 is used for adjusting the position of the displacement sensor along the vertical direction of the guide plate; and the second knob 6 is used for adjusting the position of the displacement sensor along the front and back directions of the guide plate.
Further, in order to realize the stable fixation of the lower end of the guide plate 1, the following are also provided: a tibia tie 7;
the tibia bandage 7 is arranged at the lower end of the guide plate 1 and used for fixing the lower end of the guide plate 1 on the lower leg.
Further, in order to realize the stable fixation of the upper end of the guide plate 1, the following components are also arranged: an upper fixing band 8;
the upper fixing strap 8 is tied on the femur, the front end of the upper fixing strap 8 is connected with the upper end of the guide plate 1, and the joint of the upper fixing strap and the guide plate can move with six degrees of freedom after connection.
Further, the front end of the upper fixing belt 8 is made of elastic material, so that the subsequent measuring action can be operated.
Further, the present invention further includes: an instrument panel 9; the instrument panel 9 is used for acquiring the measurement data of the displacement sensor 2 and displaying the measurement data on the instrument panel 9.
The instrument panel 9 is arranged in a mode of being externally hung at any position of the axial displacement measuring equipment, or the instrument panel 9 is independently arranged and connected in any mode including wired and wireless modes.
Example two
As shown in fig. 3, the structure of the present embodiment is basically the same as that of the first embodiment, except that a position tracker 3 is added to the present embodiment;
the position tracker 3, further comprising: a first position tracker 31 and a second position tracker 32; the first position tracker 31 is fixed on the front end of the displacement sensor 2, and the second position tracker 32 is fixed on the femur; the first position tracker 31 and the second position tracker 32 cooperate to acquire the angle of the tibia bending and the acceleration of the tibia during movement through the first position tracker 31.
In particular, in order to make the measurement of the injury degree of the cruciate ligament more accurate, the invention adds a position tracker 3 on the basis of the displacement sensor 2.
Through setting up respectively in displacement sensor 2 front end to and two position tracker 3 on being fixed in the thighbone cooperate, obtain two position tracker 3's positional information after, can calculate the crooked angle of shin bone for straightening the state. It should be noted that the present invention mainly protects the mechanical structure of the axial displacement measuring device, and the specific way of obtaining the angle calculated by the two position trackers 3 is not limited in any way. For example, a reference coordinate system for the overall measurement can be established, coordinate information of the first position tracker 31, the second position tracker 32 and the patella center can be obtained, and a vector from the first position tracker 31 to the patella center and a vector from the patella center to the second position tracker 32 can be calculated according to the coordinate information. The angle between the two vectors is calculated, which is the angle of the tibia bent relative to the straightened state.
Further, by tracking the position of the first position tracker 31 in real time, acceleration information during the movement of the tibia can be acquired.
The degree of cruciate ligament injury can be judged in an auxiliary manner according to the expression of each level of cruciate ligament injury degree through the angle and the acceleration information. And simultaneously, the accurate operation of the operator can be guided according to the acceleration and angle information displayed on the instrument panel.
Further, in order to fix the second position tracker 32, the second position tracker 32 may be disposed on the upper fixing strap 8, and after the upper fixing strap 8 is bound, the second position tracker 32 is fixed on the femur.
Similarly, the measurement data of the position tracker 3 is acquired by the position tracker 3 and then fed back to the instrument panel 9 for display.
EXAMPLE III
This example provides 3 specific operation modes of the present invention, which are as follows:
(1) the patient is adjusted to be in a supine position, the examiner stands outside the examined limb, passively straightens the knee joint, clicks a round button on the instrument panel, and resets the display of the displacement sensor. One hand grasps the heel to pronate the calf and the other hand applies eversion stress to the proximal tibia. The knee begins to bend gradually from 0 degrees extension, and after the knee is out of the locked position, the external tibial condyle begins to gradually subluxate anteriorly. When the knee is slowly bent for 30-40 degrees (the angle calculated by the position tracker), the tibia is suddenly restored backwards, and the mutation values (displacement and acceleration) are recorded by checking the display values so as to measure the damage degree of the ligament.
(2) The patient lies on the back, the examiner fixes his ankle after bending his knee 90 degrees (angle calculated by the position tracker), and holds the upper end of the lower leg with both hands to stretch from back to front. And recording and comparing detection data, wherein the leg is positive when the leg is more than 5 mm.
(3) The patient bends 30 degrees (the angle calculated by the position tracker), the examiner holds the distal femur of one hand and fixes the femur, holds the proximal tibia of the other hand and pulls the proximal femur from the back to the front, the healthy side is recorded and compared, and if the proximal tibia of the examiner exceeds the normal side by 5mm, the patient is positive.
After the measurement, the degree of cruciate ligament injury was judged by the injury degree classification table (table 1). It should be noted that the ranking criteria including performance and tibial advancement distance ranking in table 1 are only a specific example. In actual use, different grading standards can be provided according to the difference of each device and the difference of various different populations, and the specific grading standard is not limited by the invention.
TABLE 1
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (10)
1. An axial displacement measurement device for cruciate ligament injury in a knee joint, comprising: a guide plate, a displacement sensor;
the lower end of the guide plate is fixed on the shank and is tightly attached to the shank;
the upper end of the guide plate is fixed on the femoral ankle, and the upper end of the guide plate deviates from the patella and the tibia by a certain distance through a supporting device arranged on the upper end of the guide plate, so that a movable space is reserved for the tibia when the axial displacement measurement is carried out;
the displacement sensor is arranged on the guide plate, and during measurement, the front end of the displacement sensor is propped against the tibial tubercle.
2. The axial displacement measurement device for knee cruciate ligament injury according to claim 1, further comprising: a position tracker;
the position tracker, further comprising: a first position tracker and a second position tracker;
the first position tracker is fixed at the front end of the displacement sensor, and the second position tracker is fixed on the femur;
the first position tracker is matched with the second position tracker to acquire the bending angle of the tibia and the acceleration of the tibia during movement through the first position tracker.
3. The axial displacement measurement device for knee cruciate ligament injury according to claim 1, further comprising:
the supporting device is a knee joint jaw;
the knee joint clamping jaws are fixedly connected with the upper ends of the guide plates;
during measurement, the knee joint clamping jaws are clamped on the patella.
4. The axial displacement measurement device for knee cruciate ligament injury according to claim 1, further comprising:
the displacement sensor is movably connected with the guide plate;
adjusting the position of the displacement sensor along the up-down direction of the guide plate so that the displacement sensor is positioned at the tibial tubercle;
adjusting the position of the displacement sensor in the anterior-posterior direction of the guide plate so that the anterior end of the displacement sensor abuts the tibial tubercle.
5. The axial displacement measurement device for knee cruciate ligament injury according to claim 4, further comprising: a first knob and a second knob;
the first knob is used for adjusting the position of the displacement sensor along the up-down direction of the guide plate;
and the second knob is used for adjusting the position of the displacement sensor along the front-back direction of the guide plate.
6. The axial displacement measurement device for knee cruciate ligament injury according to claim 1, further comprising: a tibial strap;
the tibia bandage is arranged at the lower end of the guide plate and used for fixing the lower end of the guide plate on the shank.
7. The axial displacement measurement device for knee cruciate ligament injury according to claim 1, further comprising: an upper fixing strap;
the upper fixing strap is tied on the femur, the front end of the upper fixing strap is connected with the upper end of the guide plate, and the joint of the upper fixing strap and the guide plate can move in six degrees of freedom after connection.
8. The axial displacement measurement device for knee cruciate ligament injury according to claim 7, further comprising:
the front end of the upper fixing belt is made of elastic materials, so that subsequent measuring actions can be operated.
9. The axial displacement measurement device for knee cruciate ligament injury according to claim 2, further comprising: an instrument panel;
the instrument panel is used for acquiring the measurement data of the displacement sensor and the position tracker and displaying the measurement data on the instrument panel.
10. The axial displacement measurement device for knee cruciate ligament injury according to claim 9, further comprising:
the instrument panel is hung outside at any position of the axial displacement measuring equipment, or is independently arranged and connected in any one of a wired mode and a wireless mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110176968.XA CN112826506A (en) | 2021-02-07 | 2021-02-07 | Axial displacement measuring equipment for knee joint cruciate ligament injury |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110176968.XA CN112826506A (en) | 2021-02-07 | 2021-02-07 | Axial displacement measuring equipment for knee joint cruciate ligament injury |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112826506A true CN112826506A (en) | 2021-05-25 |
Family
ID=75933047
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110176968.XA Pending CN112826506A (en) | 2021-02-07 | 2021-02-07 | Axial displacement measuring equipment for knee joint cruciate ligament injury |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112826506A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117158976A (en) * | 2023-11-03 | 2023-12-05 | 北京大学第三医院（北京大学第三临床医学院） | Novel forward looseness measuring instrument for knee joint |
| CN117297611A (en) * | 2023-09-27 | 2023-12-29 | 上海逸动医学科技有限公司 | Auxiliary device for knee joint pressure measurement |
-
2021
- 2021-02-07 CN CN202110176968.XA patent/CN112826506A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117297611A (en) * | 2023-09-27 | 2023-12-29 | 上海逸动医学科技有限公司 | Auxiliary device for knee joint pressure measurement |
| CN117158976A (en) * | 2023-11-03 | 2023-12-05 | 北京大学第三医院（北京大学第三临床医学院） | Novel forward looseness measuring instrument for knee joint |
| CN117158976B (en) * | 2023-11-03 | 2024-01-30 | 北京大学第三医院（北京大学第三临床医学院） | Novel forward looseness measuring instrument for knee joint |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4583555A (en) | Knee ligament testing system | |
| US8840570B2 (en) | Multi-section limb and ligament evaluation apparatus and associated methods for using same | |
| Markolf et al. | In vivo knee stability. A quantitative assessment using an instrumented clinical testing apparatus. | |
| US10813591B2 (en) | Robotic knee testing device, subjective patient input device and method for using same | |
| US10925519B2 (en) | Robotic knee testing (RKT) device having decoupled drive capability and systems and methods providing the same | |
| Jurist et al. | Anteroposterior tibiofemoral displacements during isometric extension efforts: the roles of external load and knee flexion angle | |
| US20110213275A1 (en) | Device for determining the stability of a knee joint | |
| EP3383284B1 (en) | Alignment device | |
| WO2005104945A2 (en) | Measurement of laxity of human joints | |
| CN112826506A (en) | Axial displacement measuring equipment for knee joint cruciate ligament injury | |
| Milner et al. | A comparison of four in vivo methods of measuring tibial torsion | |
| US20210077012A1 (en) | Robotic joint testing apparatus and coordinate systems for joint evaluation and testing | |
| Ramsey et al. | Methodological concerns using intra-cortical pins to measure tibiofemoral kinematics | |
| EP3251589B1 (en) | Robotic knee testing apparatus and patient and apparatus set-up methods | |
| US20120226199A1 (en) | The device for detecting and following up a complete or partial anterior cruciate ligament injury by means of comparing the two limbs | |
| US20210251566A1 (en) | Multi-axial joint laxity testing apparatus and method | |
| CN215017461U (en) | Axial displacement measuring equipment for knee joint cruciate ligament injury | |
| Jagodzinski et al. | Experimental and clinical assessment of the accuracy of knee extension measurement techniques | |
| JP2013502253A (en) | Measuring device for measuring knee instability | |
| CN213345593U (en) | Measurement system suitable for stability around rabbit knee joint | |
| US20220409142A1 (en) | Multi-axial joint laxity testing apparatus and method | |
| WO2021158956A1 (en) | Joint motion measurement apparatus and method of use | |
| RU2336816C2 (en) | Device for research of knee joint front back instability | |
| KR101867185B1 (en) | Method for lower extrmities range of motion measurements | |
| RU11677U1 (en) | DEVICE FOR X-RAY DIAGNOSTICS OF DAMAGES OF THE ANKLE AND TANTA JOINT |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |