CN112244881A - Wearable lower limb joint rehabilitation measuring device - Google Patents
Wearable lower limb joint rehabilitation measuring device Download PDFInfo
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- CN112244881A CN112244881A CN202010978154.3A CN202010978154A CN112244881A CN 112244881 A CN112244881 A CN 112244881A CN 202010978154 A CN202010978154 A CN 202010978154A CN 112244881 A CN112244881 A CN 112244881A
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- 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
- A61B5/1118—Determining activity level
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- 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
- A61B5/4538—Evaluating a particular part of the muscoloskeletal system or a particular medical condition
- A61B5/4585—Evaluating the knee
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
- A61B5/6802—Sensor mounted on worn items
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
- A61B5/6813—Specially adapted to be attached to a specific body part
- A61B5/6828—Leg
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
- G01K7/22—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor
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Abstract
The wearable lower limb joint rehabilitation measuring device comprises a sensor assembly, a device shell and a calculation processing terminal, wherein the sensor assembly comprises a flexible piezoresistor sheet, an electromyographic electrode sheet and a thermistor, and an electromyographic signal conditioning module, a power supply management module, a body temperature signal compensation conditioning module, a curvature signal conditioning module, a rechargeable battery, a microcontroller and a wireless communication module are packaged 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
Technical Field
The invention relates to the technical field of medical measurement, in particular to a wearable lower limb joint rehabilitation measuring device.
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, the wearable device for evaluating the activity degree of the knee joint, the surface myoelectricity and the skin temperature in real time can accurately and effectively evaluate the activity degree of the knee joint, the muscle strength, the muscle coordination and the skin temperature, assist a doctor to accurately evaluate the postoperative rehabilitation state and the local inflammatory reaction of the knee joint of a patient, guide the functional exercise of the postoperative patient in time, discover excessive inflammation after operation in early stage and prevent postoperative infection.
Disclosure of Invention
Aiming at the problems and the defects in the prior art, the invention provides a wearable lower limb joint rehabilitation measuring device.
The invention solves the technical problems through the following technical scheme:
the invention provides a wearable lower limb joint rehabilitation measuring device which is characterized by comprising a sensor assembly, a device shell and a calculation processing terminal, wherein the sensor assembly comprises a flexible piezoresistor sheet, a myoelectric electrode sheet and a thermistor, a myoelectric signal conditioning module, a power supply management module, a body temperature signal compensation conditioning module, a curvature signal conditioning module, a rechargeable battery, a microcontroller and a wireless communication module are packaged in the device shell, the flexible piezoresistor sheet is electrically connected with the curvature signal conditioning module, the myoelectric electrode sheet is electrically connected with the myoelectric signal conditioning module, and the thermistor is electrically connected with the body temperature signal compensation conditioning module;
the rechargeable battery provides power for all packaged active components, and the power management module is used for controlling and adjusting working voltage and charging voltage;
the myoelectric signal processing module is used for receiving and processing a bending signal acquired by the flexible piezoresistor sheet, the myoelectric signal processing module is used for receiving and processing a myoelectric signal acquired by the myoelectric electrode sheet, and the body temperature signal compensation processing module is used for receiving and processing a body temperature signal acquired by the thermistor;
the microcontroller is used for transmitting the received conditioned bending degree signal, the conditioned electromyographic signal and the conditioned body temperature signal to the calculation processing terminal in real time by using the wireless communication module for calculation and storage, and displaying the processing result on the calculation processing terminal.
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 randomly to obtain the preferred embodiments of the invention.
The positive progress effects of the invention are as follows:
the invention discloses a wearable measuring device for detecting knee joint activity, surface myoelectricity and skin temperature. According to the invention, the knee joint activity, the surface myoelectricity and the skin temperature are combined together to form the wearable detection device, the microcontroller is used for simultaneously calculating the angle, the temperature and the myoelectricity signal, so that the knee joint activity, the surface myoelectricity and the skin temperature are synchronously detected and recorded in real time, and the detection is simpler and quicker.
Drawings
FIG. 1 is a block diagram of a wearable measurement device for detecting knee joint activity, surface myoelectricity and skin temperature according to the present invention;
FIG. 2a is a schematic diagram of the wearable measuring device of the present invention for detecting knee joint activity, surface myoelectricity and skin temperature;
fig. 2b is a schematic view of the wearable measuring device according to the present invention with the flexible varistor being 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 technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the 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. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
As shown in fig. 1, the wearable measurement device for detecting knee joint activity, surface myoelectricity and skin temperature according to the present invention includes a sensor assembly 1, a wire harness 2, a device housing 3 and a 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, before detecting three parameters of activity, surface myoelectricity and skin temperature, the wearable measurement device for detecting knee joint activity, surface myoelectricity and skin temperature provided by the invention adopts an elastic sock to fix the flexible piezoresistor sheet 1a at the popliteal fossa position or at the outer side of the knee joint (as shown in fig. 2 b), the disposable Ag/AgCl myoelectricity electrode sheet 1b is adhered at the lower end of quadriceps femoris, and the thermistor 1c is adhered at the skin position before patella. 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
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that these are by way of example only, and that the scope of the 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 scope of the invention, and these changes and modifications are within the scope of the invention.
Claims (5)
1. A wearable lower limb joint rehabilitation measuring device is characterized by comprising a sensor assembly, a device shell and a calculation processing terminal, wherein the sensor assembly comprises a flexible piezoresistor sheet, a myoelectric electrode sheet and a thermistor, a myoelectric signal conditioning module, a power management module, a body temperature signal compensation conditioning module, a curvature signal conditioning module, a rechargeable battery, a microcontroller and a wireless communication module are packaged in the device shell, the flexible piezoresistor sheet is electrically connected with the curvature signal conditioning module, the myoelectric electrode sheet is electrically connected with the myoelectric signal conditioning module, and the thermistor is electrically connected with the body temperature signal compensation conditioning module;
the rechargeable battery provides power for all packaged active components, and the power management module is used for controlling and adjusting working voltage and charging voltage;
the myoelectric signal processing module is used for receiving and processing a bending signal acquired by the flexible piezoresistor sheet, the myoelectric signal processing module is used for receiving and processing a myoelectric signal acquired by the myoelectric electrode sheet, and the body temperature signal compensation processing module is used for receiving and processing a body temperature signal acquired by the thermistor;
the microcontroller is used for transmitting the received conditioned bending degree signal, the conditioned electromyographic signal and the conditioned body temperature signal to the calculation processing terminal in real time by using the wireless communication module for calculation and storage, and displaying the processing result on the calculation processing terminal.
2. The wearable lower limb joint rehabilitation measuring device of claim 1, further comprising a wire harness, wherein the wire harness comprises a first wire, an electrode plate snap fastener and a second wire, the electrode plate snap fastener is connected with the electromyographic electrode plate and the electromyographic signal conditioning module, the first wire is connected with the flexible piezoresistor plate and the bending signal conditioning module, and the second wire is connected with the thermistor and the body temperature signal compensation conditioning module.
3. The wearable lower limb joint rehabilitation measuring device of claim 1, wherein the myoelectric electrode sheet is a disposable Ag/AgCl myoelectric electrode sheet.
4. The wearable lower limb joint rehabilitation measuring device of claim 1, wherein a power supply capacity indicator lamp is disposed at the top end of the device housing, and a power switch is disposed at the harness input/output end.
5. The wearable lower limb joint rehabilitation measuring device of claim 1, wherein the flexible pressure sensitive resistor sheet is fixed to a popliteal fossa portion or a portion outside a knee joint, the myoelectric electrode sheet is attached to a lower end portion of quadriceps femoris, and the thermistor is attached to a portion of skin in front of a patella.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010978154.3A CN112244881A (en) | 2020-09-17 | 2020-09-17 | Wearable lower limb joint rehabilitation measuring device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010978154.3A CN112244881A (en) | 2020-09-17 | 2020-09-17 | Wearable lower limb joint rehabilitation measuring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113456024A (en) * | 2021-06-01 | 2021-10-01 | 北京大学口腔医学院 | Method and device for directly measuring joint surface pressure in real time |
Citations (5)
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| CN105286804A (en) * | 2015-12-04 | 2016-02-03 | 重庆大学 | Wearable knee-crawling movement physiological parameter detection device |
| US20160302686A1 (en) * | 2015-04-20 | 2016-10-20 | Össur Iceland Ehf | Electromyography with prosthetic or orthotic devices |
| CN107126225A (en) * | 2017-05-09 | 2017-09-05 | 南方医科大学南方医院 | A kind of knee joint remote rehabilitation system |
| CN110338953A (en) * | 2019-07-24 | 2019-10-18 | 浙江工业大学 | A kind of auxiliary hip joint orthopedic system and straightening method |
| CN209885031U (en) * | 2019-03-25 | 2020-01-03 | 四川大学华西医院 | Differential functional electrical stimulation device with angle measurement bandage and autonomous mirror image control |
-
2020
- 2020-09-17 CN CN202010978154.3A patent/CN112244881A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160302686A1 (en) * | 2015-04-20 | 2016-10-20 | Össur Iceland Ehf | Electromyography with prosthetic or orthotic devices |
| CN105286804A (en) * | 2015-12-04 | 2016-02-03 | 重庆大学 | Wearable knee-crawling movement physiological parameter detection device |
| CN107126225A (en) * | 2017-05-09 | 2017-09-05 | 南方医科大学南方医院 | A kind of knee joint remote rehabilitation system |
| CN209885031U (en) * | 2019-03-25 | 2020-01-03 | 四川大学华西医院 | Differential functional electrical stimulation device with angle measurement bandage and autonomous mirror image control |
| CN110338953A (en) * | 2019-07-24 | 2019-10-18 | 浙江工业大学 | A kind of auxiliary hip joint orthopedic system and straightening method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113456024A (en) * | 2021-06-01 | 2021-10-01 | 北京大学口腔医学院 | Method and device for directly measuring joint surface pressure in real time |
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