CN213993565U - Lower limb joint rehabilitation measuring device - Google Patents

Abstract

The utility model discloses lower limb joint rehabilitation measuring device, including sensor subassembly, device shell, calculation processing terminal, the sensor subassembly includes flexible piezo-resistor card, flesh electric electrode piece and thermistor, and the encapsulation is equipped with flesh electric signal conditioning module, power management module, body temperature signal compensation conditioning module, crookedness signal conditioning module, rechargeable battery, microcontroller and wireless communication module in the device shell; the bending signal conditioning module receives and conditions bending signals collected by the flexible piezoresistor sheet, the electromyographic signal conditioning module receives and conditions electromyographic signals collected by the electromyographic electrode sheet, and the body temperature signal compensation conditioning module receives and conditions body temperature signals collected by the thermistor; the microcontroller transmits the received conditioned bending degree signal, electromyographic signal and body temperature signal to a calculation processing terminal in real time by using a wireless communication module for calculation and storage, and displays the processing result on the calculation processing terminal.

Description

Lower limb joint rehabilitation measuring device

Technical Field

The utility model relates to a medical treatment measures technical field, especially relates to a recovered measuring device of low limbs joint.

Background

The joint mobility is the range of motion of the joint. Knee joint postoperative patient often fears to carry out the function exercise because of postoperative pain, joint swelling and inflammatory response, leads to postoperative early knee joint mobility to lose, and then leads to knee joint dysfunction. The knee joint mobility is an important index in the evaluation of knee joint function.

The surface myoelectricity, i.e., the potential at the time of contraction and relaxation of the muscle, is collected and conducted by an electromyographic sensor attached to the superficial skin of the muscle to obtain an electromyographic signal. Knee joint surface myoelectricity is a basic parameter for the evaluation of muscle, nerve and muscle coordination.

The skin temperature of the knee joint is the skin temperature on the surface of the knee joint. After knee joint operation, joint swelling is often caused by hematoma in joints, which in turn induces inflammatory reaction and even causes infection in joints, resulting in local skin temperature rise. The knee joint skin temperature is an early and sensitive index of the knee joint postoperative inflammatory reaction.

Joint mobility is currently measured clinically mainly by using joint angle rulers or disc protractors. The joint angle ruler or the disc protractor consists of a movable arm, a fixed arm and a movable center. The following problems exist in measuring joint mobility using a protractor. Firstly, the placing of the protractor can be influenced by the soft tissue of the human body, and the measuring results are different when the protractor is placed by different people; secondly, the measurement accuracy is also reduced by the non-standard angle display, the scale error, the manufacturing process and the like. At present, methods such as images and optical dotting marks are also used for measuring the joint mobility, but the methods are easily interfered by the outside, and the required equipment is expensive, so that the methods are not beneficial to clinical popularization. After knee joint replacement and knee joint movement injury, patients often suffer from muscle force reduction caused by postoperative pain and joint swelling, so that the flexion and extension activities of the knee joint are limited, and finally, the knee joint dysfunction is caused. At present, the lower limb muscle strength and the muscle coordination of a patient are clinically evaluated mainly through physical examination of a doctor, a quantitative evaluation method is lacked, and the lower limb muscle strength cannot be accurately and effectively evaluated. The knee joint postoperative patient can cause joint swelling and skin red swelling due to joint effusion, inflammatory reaction, infection and the like. At present, the knee joint skin temperature is clinically detected, the skin temperature of a healthy patient side is usually compared by the hand touch feeling of a doctor, the subjective feeling of an inspector is totally relied on, and the error is large. The joint mobility and the skin temperature cannot be accurately and effectively evaluated.

Therefore, we utility model a device of wearable real-time aassessment knee joint activity degree, surface flesh electricity and skin temperature can accurate joint activity degree, muscle power, muscle harmony and skin temperature of assessing effectively, helps accurate aassessment patient postoperative rehabilitation state of doctor, the local inflammatory response of knee joint, in time guides postoperative patient function to take exercise, early discovery postoperative excessive inflammation, prevention postoperative infection.

SUMMERY OF THE UTILITY MODEL

The utility model provides a recovered measuring device of low limbs joint to the problem that prior art exists with not enough.

The utility model discloses a solve above-mentioned technical problem through following technical scheme:

the utility model provides a recovered measuring device of low limbs joint, its characteristics lie in, it includes sensor assembly, device shell, calculation processing terminal, sensor assembly includes flexible piezo-resistor piece, flesh electric electrode piece and thermistor, the encapsulation has flesh electric signal conditioning module, power management module, body temperature signal compensation conditioning module, crookedness signal conditioning module, rechargeable battery, microcontroller and wireless communication module in the device shell, flexible piezo-resistor piece and crookedness signal conditioning module electricity are connected, flesh electric electrode piece and flesh electric signal conditioning module electricity are connected, thermistor and body temperature signal compensation conditioning module electricity are connected.

Preferably, the device further comprises a wire harness, wherein the wire harness comprises a first lead, an electrode plate snap fastener and a second lead, the electrode plate snap fastener is connected with the electromyographic electrode plate and the electromyographic signal conditioning module, the first lead is connected with the flexible piezoresistor sheet and the curvature signal conditioning module, and the second lead is connected with the thermistor and the body temperature signal compensation conditioning module.

Preferably, the myoelectric electrode plate is a disposable Ag/AgCl myoelectric electrode plate.

Preferably, the top end of the device shell is provided with a power supply electric quantity prompting lamp, and the wire harness input/output end is provided with a power supply switch.

Preferably, the flexible piezoresistor sheet is fixed at the popliteal fossa position or the outer side of the knee joint, the myoelectric electrode sheet is pasted at the lower end of quadriceps femoris, and the thermistor is pasted at the skin position before the patella.

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 a wearable measuring device that detects knee joint activity degree, surface flesh electricity and skin temperature, including sensor assembly (bend and stretch angle sensor, flesh electricity sensor, temperature sensor), power, microcontroller, communication module, device shell, data processing storage and display end. The utility model discloses combine knee joint activity degree, surface flesh electricity, skin temperature together, constitute wearing formula check out test set, calculate angle, temperature and flesh electrical signal simultaneously through microcontroller, realize knee joint activity degree, surface flesh electricity and skin temperature synchronous and real-time detection record, detect more simply swiftly.

Drawings

FIG. 1 is a block diagram of the measuring device for detecting the knee joint mobility, surface myoelectricity and skin temperature of the present invention;

FIG. 2a is a schematic diagram of the measuring device of the present invention for detecting the knee joint mobility, surface myoelectricity and skin temperature;

fig. 2b is a schematic diagram of the measuring device of the present invention in which flexible piezoresistors are mounted outside the knee joint;

fig. 3 is a schematic diagram of the results of measuring the knee joint mobility by two measurement modes.

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, the utility model provides a wearable measuring device that detects knee joint activity degree, surface flesh electricity and skin temperature, including sensor assembly 1, pencil 2, device shell 3, calculation processing terminal 4. The sensor assembly 1 is composed of a flexible piezoresistor sheet 1a, a disposable Ag/AgCl myoelectricity electrode sheet 1b and a thermistor 1 c; the wire harness 2 consists of a first conducting wire, an electrode plate snap fastener and a second conducting wire; a power supply electric quantity prompting lamp is designed at the top end of the device shell 3, a green lamp indicates that the device is powered on and the electric quantity is sufficient, and a power supply switch is designed at the wire harness input/output end; the device shell 3 is packaged with an electromyographic signal conditioning module 3c, a power supply management module 3d, a body temperature signal compensation conditioning module 3e, a curvature signal conditioning module 3f, a rechargeable battery 3g, an MCU (microprogrammed control unit) microcontroller 3h and a wireless communication module 3 i; the electrode plate is connected with the disposable Ag/AgCl myoelectric electrode plate 1b and the myoelectric signal conditioning module 3c in a snap-in mode, the first lead is connected with the flexible piezoresistor sheet 1a and the bending signal conditioning module 3f, and the second lead is connected with the thermistor 1c and the body temperature sensor signal compensation conditioning module 3 e; the rechargeable battery 3g provides power for all the active components, and the power management module 3d controls and adjusts working voltage and charging voltage; the calculation processing terminal 4 is composed of a computer and a display screen.

As shown in fig. 2a, the utility model provides a wearable measuring device who detects knee joint activity degree, surface flesh electricity and skin temperature before detecting activity degree, surface flesh electricity and three parameters of skin temperature, adopts the elasticity socks will flexible pressure sensitive resistance piece 1a is fixed in popliteal fossa position, perhaps knee joint outside position (as shown in fig. 2 b), disposable Ag AgCl flesh electricity electrode piece 1b is pasted at quadriceps femoris lower extreme position, thermistor 1c is pasted in the skin position before the kneecap. The bending degree signal conditioning module 3f is used for receiving and conditioning bending degree signals collected by the flexible pressure sensitive resistor sheet 1a, the electromyographic signal conditioning module 3c is used for receiving and conditioning electromyographic signals collected by the electromyographic electrode sheet 1b, and the body temperature signal compensation conditioning module 3e is used for receiving and conditioning body temperature signals collected by the thermistor 1 c. The MCU 3h collects three parameters, a local area network is established with the calculation processing terminal 4 through a WiFi module of the wireless communication module 3i, the three parameters are transmitted to the computer 4a in real time for calculation and storage, and a processing result is displayed on the display screen 4 b.

After wearing the measuring device, the computer records the skin temperature before testing. Then, the examinee is ordered to carry out flexion, the midpoint of the protractor is placed on the outer side of the knee joint from the extension position, the two ends of the protractor are respectively attached to the femur long axis and the tibia long axis, the knee joint extension position angle is recorded, the elbow joint is gradually flexed to 60 degrees until the maximum flexion activity degree is reached, the knee joint activity degrees (extension angle and flexion angle) of the examinee are recorded, and the output result is shown in fig. 3. Meanwhile, the results of the knee joint mobility test by comparing the two measurement methods are shown in table 1 a. When the surface myoelectricity is tested, the knee joint isomotor test and the knee joint resistance motor test are respectively carried out. When the isomotor test is carried out, a testee takes a sitting position, the hip joint bends 85 degrees, the knee joint stretches from the 90-degree bending position to the 0-degree bending position at a constant speed for 3 times, the test is carried out at intervals of 30 seconds, the surface myoelectricity is recorded, and the average value of the 3 times of tests is taken as the final measurement value. When the knee joint resistance movement test is carried out, a testee takes a sitting position, the hip joint bends 85 degrees, the knee joint bends 90 degrees, the testee holds the front of the ankle joint of the testee with a hand, resistance is given, the testee contracts with force for 3 times, the test is carried out for 30 seconds, the average value of the test of 3 times is taken as the final measurement value after recording the surface myoelectricity, and the result is shown in tables 1b and 1 c.

TABLE 1a results of measuring knee joint mobility by two measurement methods

TABLE 1b Knee Joint skin temperature results measured with temperature sensor

TABLE 1c results of superficial myoelectricity of the rectus femoris for isotonic and anti-obstructive exercise

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 (5)

1. The utility model provides a recovered measuring device of low limbs joint, its characterized in that, it includes sensor subassembly, device shell, calculation processing terminal, sensor subassembly includes flexible piezo-resistor piece, flesh electric electrode piece and thermistor, the encapsulation is equipped with flesh electric signal conditioning module, power management module, body temperature signal compensation conditioning module, crookedness signal conditioning module, rechargeable battery, microcontroller and wireless communication module in the device shell, flexible piezo-resistor piece and crookedness signal conditioning module electricity are connected, flesh electric electrode piece and flesh electric signal conditioning module electricity are connected, thermistor and body temperature signal compensation conditioning module electricity are connected.

2. The lower limb joint rehabilitation measuring device of claim 1, further comprising a wire harness, wherein the wire harness comprises a first conducting wire, an electrode plate snap fastener and a second conducting wire, the electrode plate snap fastener is connected with the electromyographic electrode plate and the electromyographic signal conditioning module, the first conducting wire is connected with the flexible piezoresistor plate and the bending signal conditioning module, and the second conducting wire is connected with the thermistor and the body temperature signal compensation conditioning module.

3. The lower limb joint rehabilitation measuring device of claim 1, wherein the myoelectric electrode plate is a disposable Ag/AgCl myoelectric electrode plate.

4. The lower limb joint rehabilitation measuring device of claim 1, wherein a power supply capacity indicator lamp is arranged at the top end of the device shell, and a power supply switch is arranged at the wire harness input/output end.

5. The lower limb joint rehabilitation measuring device of claim 1, wherein the flexible pressure sensitive resistor sheet is fixed at the popliteal fossa part or the part outside the knee joint, the myoelectric electrode sheet is adhered at the lower end part of quadriceps femoris, and the thermistor is adhered at the skin part before the patella.

Images