CN213993566U - Axial displacement detection device - Google Patents
Axial displacement detection device Download PDFInfo
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- CN213993566U CN213993566U CN202022041163.8U CN202022041163U CN213993566U CN 213993566 U CN213993566 U CN 213993566U CN 202022041163 U CN202022041163 U CN 202022041163U CN 213993566 U CN213993566 U CN 213993566U
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Abstract
The utility model discloses an axial displacement detection device, which comprises a tibia acceleration sensor assembly, an upper computer and a display screen, wherein the tibia acceleration sensor assembly and the display screen are electrically connected with the upper computer; the tibia acceleration sensor component is used for detecting triaxial acceleration data of a tibia relative to a femur during knee joint movement, and sending the triaxial acceleration data to an upper computer in a wireless mode, wherein the upper computer is used for controlling the sampling rate of the tibia acceleration sensor component and storing the triaxial acceleration data, and analyzing the maximum acceleration and the minimum acceleration of the tibia in the axial displacement phenomenon through a graph of dynamic display time and acceleration signals of a display screen. The utility model discloses small, sensitivity is high, with low costs, has overcome clinical manual measurement and has not had objective index, precision low, the slow shortcoming of speed.
Description
Technical Field
The utility model relates to a medical measuring instrument technical field especially relates to an axial displacement detection device based on acceleration sensor.
Background
The axial shift test is a clinical method for checking the highest specificity of the rotation instability after the injury of the anterior cruciate ligament of the knee joint. The examination of the axial shift test can specifically judge whether the anterior cruciate ligament of the knee joint is damaged or not, the severity of the damage and the like, and is an important reference index for clinically diagnosing the injury of the anterior cruciate ligament and formulating a treatment scheme.
At present, the clinical axial displacement test result (0-normal, I-sliding, II-jumping, III-twist lock or semi-dislocation) is mainly judged subjectively by a clinician during physical examination, and more subjective factors and inevitable problems exist during the examination of the axial displacement test, such as the judgment of the physical examination result is related to the clinical experience of different examiners and the operation during physical examination. In addition, the result grade of the axial shift test is judged by the individual subjective judgment of the examiner.
Therefore, how to objectively, accurately and quickly judge the result of the axial shift test becomes a problem to be solved in clinic.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to current inspection shaft shift test method and judge the not enough of testing result, provide a novel axle based on acceleration sensor and move detection device, through the acceleration value of shin bone when detecting the shaft shift test, can accurately judge the shaft shift test result.
The utility model discloses a solve above-mentioned technical problem through following technical scheme:
the utility model provides an axial displacement detection device, which is characterized in that the axial displacement detection device comprises a tibia acceleration sensor component, an upper computer and a display screen, wherein the tibia acceleration sensor component and the display screen are both electrically connected with the upper computer, and the tibia acceleration sensor component is fixed between a Gredy nodule of a knee joint on an examination side and a fibula capitula;
the tibia acceleration sensor assembly comprises an acceleration sensor, a sampling module, a power management module, a storage and a wireless communication module, wherein the acceleration sensor, the storage and the wireless communication module are all electrically connected with the acquisition module, the power management module is electrically connected with the sampling module and the acceleration sensor, and the wireless communication module is electrically connected with an upper computer.
Preferably, the acceleration sensor is a MEMS acceleration sensor.
Preferably, the wireless communication module adopts a bluetooth transmitting module or a WIFI transmitting module.
Preferably, the tibial acceleration sensor assembly is fixed between the knee joint Gredy's tuberosity and the fibula capitis on the examination side by using double-faced adhesive tape.
On the basis of the common knowledge in the field, the above preferred conditions can be combined at will to obtain the preferred embodiments of the present invention.
The utility model discloses an actively advance the effect and lie in:
the utility model discloses an axial displacement detection device, acceleration sensor are accelerated speed value when being used for detecting the axial displacement test, through collection module and wireless communication module with acceleration signal transmission to the host computer, the relative thighbone acceleration signal of shin bone when the host computer obtains the knee joint motion to judge whether positive in the axial displacement test. The utility model discloses small, sensitivity is high, with low costs, has overcome clinical manual measurement and has not had objective index, precision low, the slow shortcoming of speed.
Drawings
Fig. 1 is a schematic structural view of an axial displacement detecting device according to a preferred embodiment of the present invention.
Fig. 2 is a schematic circuit diagram of the axial displacement detecting device according to the preferred embodiment of the present invention.
Fig. 3 is a schematic diagram of a standard axial displacement test method according to a preferred embodiment of the present invention.
Fig. 4 is a diagram of the axial displacement detection data according to the preferred embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1 and fig. 2, the present embodiment provides an axial displacement detection device, which includes a tibial acceleration sensor assembly 1, an upper computer 2 and a display screen 3, where the tibial acceleration sensor assembly 1 and the display screen 3 are both electrically connected to the upper computer 2.
The tibia acceleration sensor component 1 is used for detecting triaxial (x, y, z) acceleration data of the tibia relative to the femur during knee joint movement, sending the triaxial acceleration data to the upper computer 2 in a wireless mode, the upper computer 2 is used for controlling the sampling rate of the tibia acceleration sensor component 1 and storing the triaxial acceleration data, dynamically displaying a time and acceleration signal curve diagram through the display screen 3, and analyzing the maximum acceleration and the minimum acceleration of the tibia in the axial displacement phenomenon.
Wherein, shin bone acceleration sensor subassembly 1 includes MEMS acceleration sensor 11, sampling module 12, power management module 13, memory 14 and wireless communication module 15, MEMS acceleration sensor 11, memory 14 and wireless communication module 15 all are connected with collection module 12 electricity, power management module 13 is connected with sampling module 12 and MEMS acceleration sensor 11 electricity, wireless communication module 15 is connected with 2 electricity on the host computer, wireless communication module 15 adopts bluetooth emission module or WIFI emission module.
As shown in fig. 3, the standard axial shift test procedure is: after the anesthesia achievement, the patient takes the supine position, is fixed in between inspection side knee joint Gredy tubercle and the fibula microcephaly with shin bone acceleration sensor subassembly 1 using the double faced adhesive tape, consequently the shin bone lateral surface is pressed close to most in the department, can reflect the relative activity of shin bone in the axle shift test most. The examiner stands on one side of the tested knee joint of the patient; the examiner holds the ankle joint of the patient with one hand and applies a certain stress to make the shank in the internal rotation position, and holds the knee joint with the other hand and applies a certain eversion stress to make the lower limb of the patient in the eversion and internal rotation position. And finally, applying an axial stress while keeping the internal rotation and the external rotation to enable the knee joint to bend and straighten at a constant speed. When the knee joint is bent by 20-30 degrees, if the tibia of a patient can be observed and felt to obviously accelerate to slide forwards or jump after the anterior cruciate ligament of the patient is damaged, the MEMS acceleration sensor 11 can acquire the acceleration data of the tibia and transmit the acceleration data to an upper computer through a Bluetooth module, and the maximum acceleration and the minimum acceleration of the tibia in the axial displacement phenomenon are analyzed according to the acquired data. The axial shift test grading (0-normal; I degree-slip; II degree-jump; III degree-twist or subluxation) is evaluated clinically in terms of anterior sliding or dislocation of the tibia relative to the femur. With this test instrument and method, we wish to quantitatively assess the result rating of the axial shift test by tibial acceleration values.
As shown in figure 4, the instrument and the method are adopted to test 32 cases of anterior cruciate ligament injury patients who undergo harvesting and treatment operations in the department of China from 2018.12 months to 2019.10 months in clinic, all the axis shift test tests are completed by the same experienced master doctor, the knee joint axis shift tests on the healthy side and the affected side are performed after the patients are anesthetized, the axis shift test grading is clinically evaluated, the axis shift test of each knee joint is repeated for 3 times, and the recorded data is collected. Then the data is processed in a computer, the maximum acceleration (flexion) and the minimum acceleration (extension) of the tibia in the knee joint axial displacement test of the healthy side and the affected side are respectively selected for 3 times, and finally the accelerations of the tibia of the healthy side and the affected side are compared. Data analysis independent sample t-tests were performed using SPSS22 software. The test result shows that the tibial acceleration value in the axial shift test of the affected knee joint after the injury of the anterior cruciate ligament is obviously larger than that of the healthy knee joint, and the statistical significance is achieved (p is less than 0.05).
TABLE 1 group statistics
TABLE 2 independent sample assay
TABLE 3 independent sample assay
Although particular embodiments of the present invention have been described above, it will be appreciated by those skilled in the art that these are examples only and that the scope of the present invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and the principles of the present invention, and these changes and modifications are all within the scope of the present invention.
Claims (4)
1. The axial displacement detection device is characterized by comprising a tibia acceleration sensor assembly, an upper computer and a display screen, wherein the tibia acceleration sensor assembly and the display screen are both electrically connected with the upper computer, and the tibia acceleration sensor assembly is fixed between a knee joint Gredy nodule on an examination side and a fibula capitulum;
the tibia acceleration sensor assembly comprises an acceleration sensor, a sampling module, a power management module, a storage and a wireless communication module, wherein the acceleration sensor, the storage and the wireless communication module are all electrically connected with the acquisition module, the power management module is electrically connected with the sampling module and the acceleration sensor, and the wireless communication module is electrically connected with an upper computer.
2. The axial displacement sensing device of claim 1, wherein the acceleration sensor is a MEMS acceleration sensor.
3. The axial displacement detection device of claim 1, wherein the wireless communication module is a bluetooth transmission module or a WIFI transmission module.
4. The axial displacement sensing device of claim 1, wherein the tibial acceleration sensor assembly is secured between the gledy's tuberosity and the fibula capitis of the exam-side knee joint using double-sided adhesive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022041163.8U CN213993566U (en) | 2020-09-17 | 2020-09-17 | Axial displacement detection device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022041163.8U CN213993566U (en) | 2020-09-17 | 2020-09-17 | Axial displacement detection device |
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| CN213993566U true CN213993566U (en) | 2021-08-20 |
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