CN107242907B - Knee joint unicondylar pressure measuring device and system - Google Patents
Knee joint unicondylar pressure measuring device and system Download PDFInfo
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- CN107242907B CN107242907B CN201710620938.7A CN201710620938A CN107242907B CN 107242907 B CN107242907 B CN 107242907B CN 201710620938 A CN201710620938 A CN 201710620938A CN 107242907 B CN107242907 B CN 107242907B
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- unicondylar
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/06—Measuring instruments not otherwise provided for
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
- A61F2/4603—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof
- A61F2/461—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof of knees
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
- A61F2/4657—Measuring instruments used for implanting artificial joints
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B2017/564—Methods for bone or joint treatment
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/06—Measuring instruments not otherwise provided for
- A61B2090/064—Measuring instruments not otherwise provided for for measuring force, pressure or mechanical tension
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
- A61F2/4657—Measuring instruments used for implanting artificial joints
- A61F2002/4666—Measuring instruments used for implanting artificial joints for measuring force, pressure or mechanical tension
Abstract
The invention provides a knee joint unicondylar pressure measuring device and a system, wherein the knee joint unicondylar pressure measuring device comprises a pressure measuring head, a connecting part and a holding handle; the holding handle is connected with the pressure measuring head through a connecting part; the upper surface of the pressure measuring head is provided with a half-moon-shaped groove which is matched with the femoral unicondylar prosthesis; the pressure measuring head comprises a containing cavity, wherein a pressure sensor is arranged in the containing cavity and used for measuring the pressure born by the pressure measuring head and generating a pressure signal. In the operation of knee joint unicondylar replacement, after the femur unicondylar prosthesis and the tibia prosthesis are installed, the knee joint unicondylar pressure measuring device provided by the embodiment of the invention is used for measuring the pressure between joints between the femur unicondylar prosthesis and the tibia prosthesis, so that a doctor can know the pressure magnitude and the pressure distribution of joint gaps in the operation process, the accuracy of positioning and size selection of a meniscus liner is improved, and the stress balance of the implanted knee joint prosthesis is ensured.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a knee joint unicondylar pressure measuring device and system.
Background
Osteoarthritis is a common clinical orthopedic disorder, and osteoarthritis of the knee joint is one of the more frequent cases. In the later stage of osteoarthritis of the knee joint, the joint mobility is severely affected by pain and swelling of the knee joint. For late stage knee osteoarthritis, the typical treatment is: artificial knee joint replacement. Artificial knee arthroplasty can be distinguished according to the degree of retention of the knee joint: total knee replacement and knee unicondylar replacement.
The knee joint unicondylar replacement is a minimally invasive technique of MIS (minimally invasive surgery), so that the pain of a patient is reduced, the hospitalization time is shortened, and the function is quickly recovered. In the unicondylar replacement of knee joint, the knee joint prosthesis generally includes a femoral unicondylar prosthesis, a tibial prosthesis and a meniscus liner, wherein the meniscus liner is arranged between the femoral unicondylar prosthesis and the tibial prosthesis, and is used for stabilizing the femoral unicondylar prosthesis and preventing the femoral prosthesis from shifting, and is also used for transmitting the load force of the knee joint to play a role in stabilizing the load. Therefore, after the femoral unicondylar prosthesis and the tibial prosthesis are installed in the knee joint unicondylar replacement operation, accurate positioning and size selection of the meniscus liner are of great importance in order to ensure balanced stress of the implanted knee joint prosthesis.
In the prior art, doctors often rely on subjective judgment for placement and size selection of meniscal liners and cannot perform accurate positioning, and therefore the balance of stress of implanted knee joint prostheses cannot be ensured.
Disclosure of Invention
In view of the above, the present invention aims to provide a knee joint unicondylar pressure measurement device and system to alleviate the technical problem that in the prior art, when a surgeon performs placement and size selection on a meniscus liner, the meniscus liner cannot be accurately positioned by subjective judgment, which may result in failure to ensure balanced stress of an implanted knee joint prosthesis.
In a first aspect, an embodiment of the present invention provides a knee joint unicondylar pressure measurement device, including a pressure measurement head, a connection portion, and a grip handle; the holding handle is connected with the pressure measuring head through the connecting part;
the upper surface of the pressure measuring head is provided with a half-moon-shaped groove, and the groove is matched with the femoral unicondylar prosthesis; the pressure measuring head comprises a containing cavity, a pressure sensor is arranged in the containing cavity and used for measuring the pressure born by the pressure measuring head and generating a pressure signal.
With reference to the first aspect, an embodiment of the present invention provides a first possible implementation manner of the first aspect, wherein a processor connected to the pressure sensor is further disposed inside the grip handle, and the processor receives the pressure signal, processes the pressure signal, and generates a pressure data packet, where the pressure data packet includes pressure data.
With reference to the first possible implementation manner of the first aspect, an embodiment of the present invention provides a second possible implementation manner of the first aspect, wherein a first wireless communication module is further disposed inside the holding handle, and the processor sends the pressure data packet to a receiver corresponding to a terminal device through the first wireless communication module.
With reference to the second possible implementation manner of the first aspect, the present invention provides a third possible implementation manner of the first aspect, wherein a first battery is further disposed inside the grip handle, and the first battery supplies power to the pressure sensor, the processor, and the first wireless communication module.
With reference to the third possible implementation manner of the first aspect, an embodiment of the present invention provides a fourth possible implementation manner of the first aspect, where the present invention further includes a power management chip disposed inside the grip handle, and the power management chip is connected to the first battery, and is configured to convert, distribute, and detect a power output signal of the first battery, generate a stable voltage signal, and transmit the stable voltage signal to the pressure sensor, the processor, and the first wireless communication module.
With reference to the third possible implementation manner of the first aspect, the present invention provides a fifth possible implementation manner of the first aspect, wherein a display screen is disposed on an upper surface of the grip handle, and the display screen is connected to the processor and the first battery and is used for displaying the pressure data.
With reference to the first aspect, an embodiment of the present invention provides a sixth possible implementation manner of the first aspect, wherein the pressure measurement head is detachably connected to the connecting portion.
With reference to the first aspect, an embodiment of the present invention provides a seventh possible implementation manner of the first aspect, wherein a plurality of heightening gaskets are connected to the bottom of the pressure measurement head.
In a second aspect, an embodiment of the present invention further provides a knee joint unicondylar pressure measurement system, which includes a terminal device, a receiver, and the knee joint unicondylar pressure measurement apparatus according to the first aspect, where the terminal device and the knee joint unicondylar pressure measurement apparatus are respectively connected to the receiver.
With reference to the second aspect, an embodiment of the present invention provides a first possible implementation manner of the second aspect, where the receiver includes a second wireless communication module, a data processing circuit, and a terminal communication interface, which are connected in sequence;
the second wireless communication module receives a pressure data packet and sends the pressure data packet to the data processing circuit;
the data processing circuit receives the pressure data packet, demodulates the pressure data packet to generate a pressure demodulation signal, and sends the pressure demodulation signal to the terminal communication interface so as to transmit the pressure demodulation signal to the terminal equipment;
the receiver further comprises a second battery, and the second battery supplies power to the second wireless communication module, the data processing circuit and the terminal communication interface.
The embodiment of the invention has the following beneficial effects:
in the embodiment provided by the invention, the knee joint unicondylar pressure measuring device comprises a pressure measuring head, a connecting part and a holding handle; the holding handle is connected with the pressure measuring head through a connecting part; the upper surface of the pressure measuring head is provided with a half-moon-shaped groove which is matched with the femoral unicondylar prosthesis; the pressure measuring head comprises a containing cavity, wherein a pressure sensor is arranged in the containing cavity and used for measuring the pressure born by the pressure measuring head and generating a pressure signal. In the operation of knee joint unicondylar replacement, after a femur unicondylar prosthesis and a tibia prosthesis are installed, the knee joint unicondylar pressure measuring device provided by the embodiment of the invention is placed in a joint gap between the femur unicondylar prosthesis and the tibia prosthesis, and the stress condition of the joint gap, namely the stress condition of a meniscus liner, is measured in real time, so that a pressure signal is generated. Therefore, a doctor can fully know the pressure size and the pressure distribution of the joint clearance according to the pressure signal in the operation process, the accuracy of positioning and size selection of the meniscus liner is improved, and the stress balance of the implanted knee joint prosthesis is ensured.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a first schematic structural view of a unicondylar knee pressure measurement device according to an embodiment of the present invention;
FIG. 2 is a top view of a unicondylar knee pressure measurement device provided in accordance with an embodiment of the present invention;
FIG. 3 is a bottom view of a unicondylar knee pressure measurement device provided in accordance with an embodiment of the present invention;
FIG. 4 is a left side view of a knee unicondylar pressure measurement device provided in accordance with an embodiment of the present invention;
FIG. 5 is a second schematic diagram of a unicondylar knee pressure measurement device according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of an array sensor in a knee unicondylar pressure measurement device according to an embodiment of the present invention;
FIG. 7 is a circuit diagram of a knee unicondylar pressure measurement device provided in accordance with an embodiment of the present invention;
FIG. 8 is a schematic structural view of a knee unicondylar pressure measurement system provided in accordance with an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a receiver in a knee unicondylar pressure measurement system according to an embodiment of the present invention.
Icon:
10-a pressure measuring head; 110-a pressure sensor; 120-a processor; 130-a first wireless communication module; 140-a first battery; 150-a display screen; 20-a connecting part; 30-a grip handle; 100-a terminal device; 200-a receiver; 210-a second wireless communication module; 220-data processing circuitry; 230-terminal communication interface; 240-a second battery; 300-knee unicondylar pressure measurement device; 400-femoral unicondylar prosthesis; 500-tibial prosthesis.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the prior art, doctors often rely on subjective judgment for placement and size selection of meniscal liners and cannot perform accurate positioning, and therefore the balance of stress of implanted knee joint prostheses cannot be ensured. Based on this, the embodiment of the invention provides a knee joint unicondylar pressure measuring device and a knee joint unicondylar pressure measuring system, in the knee joint unicondylar replacement surgery, after a femur unicondylar prosthesis and a tibia prosthesis are installed, the knee joint unicondylar pressure measuring device provided by the embodiment of the invention is placed in a joint gap between the femur unicondylar prosthesis and the tibia prosthesis, and the stress condition of the joint gap, namely the stress condition of a meniscus liner, is measured in real time, so that a pressure signal is generated. Therefore, a doctor can fully know the pressure size and the pressure distribution of the joint clearance according to the pressure signal in the operation process, the accuracy of positioning and size selection of the meniscus liner is improved, and the stress balance of the implanted knee joint prosthesis is ensured.
For the convenience of understanding the present embodiment, a knee unicondylar pressure measurement device disclosed in the present embodiment will be described in detail first.
The first embodiment is as follows:
fig. 1 shows a schematic structural diagram of a knee joint unicondylar pressure measurement device provided by an embodiment of the invention. As shown in fig. 1, the knee joint unicondylar pressure measuring device includes a pressure measuring head 10, a connecting portion 20 and a holding handle 30; wherein the grip handle 30 is connected to the pressure measuring head 10 by means of the connecting portion 20.
The upper surface of the pressure measuring head 10 is provided with a half-moon shaped recess which matches the femoral unicondylar prosthesis. In particular, to facilitate the determination of the size and mounting position of the meniscal pad, the shape of the pressure measurement head 10 is the same as the shape of the meniscal pad that the patient needs to replace. Specifically, the top view, the bottom view and the left side view of the knee joint unicondylar pressure measuring device provided by the embodiment of the invention are shown in fig. 2, fig. 3 and fig. 4, wherein the knee joint unicondylar pressure measuring device is of a symmetrical structure, and the left side view and the right side view are the same.
Further, the pressure measuring head 10 comprises a receiving cavity, in which a pressure sensor is arranged, the pressure sensor is used for measuring the pressure of the pressure measuring head 10 and generating a pressure signal, wherein the pressure is the pressure of the meniscus liner to be installed between the femoral unicondylar prosthesis and the tibial prosthesis.
Further, the pressure measuring head 10 is detachably connected to the connecting portion 20, wherein the connecting means includes any one of a screw connection, a snap connection and a hinge connection. The pressure measuring head 10 may have a plurality of models, each corresponding to a different size. During the measurement, the pressure measuring head 10 can be replaced according to the specific sizes of the femoral unicondylar prosthesis and the tibial prosthesis of the patient.
After the pressure measuring head 10 is sized, a plurality of heightening gaskets can be connected to the bottom of the pressure measuring head 10, so that the pressure measuring head 10 can be better matched with the joint clearance between the femoral unicondylar prosthesis and the tibial prosthesis. Specifically, the number of the shims for increasing may be selected according to the actual joint space size, and then the number of shims for increasing and the type of the pressure measurement head 10 may be selected to match the number of shims for increasing.
Further, the pressure sensor may be selected to be of different types according to the shape and size of the pressure measuring head 10. The pressure sensors can also be selected in different numbers and arrangements according to functional requirements, for example: if it is desired to differentiate between the medial and lateral pressure distributions of the femoral unicondylar prosthesis, as shown in FIG. 5, a plurality of pressure sensors 110 may be arranged laterally, wherein the lateral direction is the direction of extension of the pressure measuring head 10 toward the end of the grip handle 30 remote from the connecting portion 20; if it is desired to measure the motion trajectory of the femoral unicondylar prosthesis relative to the upper surface of the tibial prosthesis, a plurality of pressure sensors 110 may be arranged longitudinally, where the longitudinal direction is a direction perpendicular to the lateral direction.
Further, in order to simplify the manufacturing process of the pressure measuring head 10, an array sensor may be installed inside the pressure measuring head 10, wherein the array sensor may be arranged in a linear arrangement, a circumferential arrangement, a rectangular arrangement, or other polygonal arrangements. Preferably, in one embodiment, as shown in fig. 6, the array sensors may be selected in a matrix arrangement, thereby saving area, i.e., a larger number of pressure sensors 110 can be placed in a unit area, so as to detect pressures distributed at different positions, and thus make the measurement result more accurate. Specifically, in the embodiment provided by the present invention, the array sensor needs to meet the requirements of the preset measurement accuracy and the preset measurement range, and the preset measurement accuracy and the preset measurement range may be set according to the actual needs, which is not limited herein.
In the embodiment provided by the invention, the knee joint unicondylar pressure measuring device comprises a pressure measuring head, a connecting part and a holding handle; the holding handle is connected with the pressure measuring head through a connecting part; the upper surface of the pressure measuring head is provided with a half-moon-shaped groove which is matched with the femoral unicondylar prosthesis; the pressure measuring head comprises a containing cavity, wherein a pressure sensor is arranged in the containing cavity and used for measuring the pressure born by the pressure measuring head and generating a pressure signal. In the operation of knee joint unicondylar replacement, after a femur unicondylar prosthesis and a tibia prosthesis are installed, the knee joint unicondylar pressure measuring device provided by the embodiment of the invention is placed in a joint gap between the femur unicondylar prosthesis and the tibia prosthesis, and the stress condition of the joint gap, namely the stress condition of a meniscus liner, is measured in real time, so that a pressure signal is generated. Therefore, a doctor can fully know the pressure size and the pressure distribution of the joint clearance according to the pressure signal in the operation process, the accuracy of positioning and size selection of the meniscus liner is improved, and the stress balance of the implanted knee joint prosthesis is ensured.
Further, as shown in fig. 5 and 7, a processor 120 connected to the pressure sensor 110 is further disposed inside the grip handle 30, the processor 120 receives a pressure signal sent by the pressure sensor 110, processes the pressure signal to generate a pressure data packet, wherein the pressure data packet includes pressure data, the type of the pressure signal may be an analog signal or a digital signal, and when the type of the pressure signal is an analog signal, the processor 120 performs analog-to-digital conversion on the pressure signal. Preferably, to save volume, the processor 120 is a microprocessor in this embodiment.
In one embodiment, the type of the pressure signal generated by the pressure sensor 110 is an analog signal, and the processor 120 includes an analog-to-digital conversion circuit, a noise reduction circuit, and a digital modulation circuit connected in sequence, where the analog-to-digital conversion circuit performs analog-to-digital conversion on the pressure signal to generate a digital pressure signal, the noise reduction circuit performs noise reduction on the digital pressure signal to generate a noise reduction digital signal, and the digital modulation circuit modulates the noise reduction digital signal to generate a pressure data packet.
Further, as shown in fig. 7, in order to facilitate the doctor to check the pressure signal, a first wireless communication module 130 is further disposed inside the grip handle 30, and the processor 120 sends the pressure data packet to a receiver corresponding to the terminal device through the first wireless communication module 130, so that the doctor corresponding to the terminal device checks the pressure signal.
Further, a first battery 140 is disposed inside the grip handle 30, the first battery 140 is connected to the pressure sensor 110, the processor 120 and the first wireless communication module 130, and the pressure sensor 110, the processor 120 and the first wireless communication module 130 supply power. Specifically, the first battery 140 may be a rechargeable battery detachably mounted inside the grip handle 30. In order to charge the first battery 140, a charging plug is further provided at one end of the grip handle 30 for supplying power to the first battery 140.
Furthermore, in consideration of the power source inconsistency required by the pressure sensor 110, the processor 120 and the first wireless communication module 130, the knee joint unicondylar pressure measurement device further includes a power source management chip, which is connected to the first battery 140 and is used for transforming, distributing and detecting the power source output signal of the first battery 140, generating a stable voltage signal and transmitting the stable voltage signal to the pressure sensor 110, the processor 120 and the first wireless communication module 130 respectively. Wherein the power management chip can be any one of HIP6301, IS6537 and RT 9237.
Further, as shown in fig. 1 and 7, a display 150 is disposed on the upper surface of the grip handle 30, the display 150 is connected to the processor 120 and the first battery 140, the first battery 140 supplies power to the display 150, and the display 150 is used for displaying the pressure data transmitted by the processor 120. Thus, during the operation of knee joint unicondylar replacement, the doctor can directly know the pressure between the femoral unicondylar prosthesis and the tibial prosthesis through the display screen 150 on the upper surface of the holding handle 30.
Further, the pressure sensor 110 may also be a piezoelectric pressure sensor, which converts external pressure change into voltage change by using the piezoelectric property of the piezoelectric material, so as to generate a pressure signal. Thus, the pressure sensor 110 can operate normally without an external power supply.
Further, the grip handle 30 is provided with a switch button for controlling the opening and closing of the knee joint unicondylar pressure measuring device.
Further, the grip handle 30 is provided with a memory card interface connected to the processor 120, the interface being used for connecting a memory card for storing pressure data during measurement. In addition, the grip handle 30 is further provided with a storage button for activating a storage function and connecting a memory card to store the pressure data.
Example two:
fig. 8 shows a schematic structural diagram of a knee joint unicondylar pressure measurement system provided by an embodiment of the invention. As shown in fig. 8, the knee unicondylar pressure measurement system includes a terminal device 100, a receiver 200, and a knee unicondylar pressure measurement device 300 according to the first embodiment, wherein the terminal device 100 and the knee unicondylar pressure measurement device 300 are respectively connected to the receiver 200.
Specifically, when the device 300 is used, the knee unicondylar pressure measurement device 300 is placed in a joint gap between the femoral unicondylar prosthesis 400 and the tibial prosthesis 500, the knee unicondylar pressure measurement device 300 sends a pressure data packet to the receiver 200, the receiver 200 receives the pressure data packet and then performs corresponding processing to generate pressure display data, the pressure display data is sent to the terminal device 100, the terminal device 100 displays the pressure display data in a preset mode by running corresponding software, and therefore the pressure and the distribution condition between the joint gap between the femoral unicondylar prosthesis 400 and the tibial prosthesis 500 measured by the knee unicondylar pressure measurement device 300 can be displayed on a display of the terminal device 100 clearly, so that a doctor can accurately select the model of a meniscus liner and accurately position the meniscus liner. The preset mode at least includes one or more of image display, text display and table display, and the terminal device 100 includes one or more of a mobile phone, a notebook computer, a desktop computer and a tablet computer.
In one embodiment, as shown in fig. 9, the receiver 200 includes a second wireless communication module 210, a data processing circuit 220 and a terminal communication interface 230, which are connected in sequence. The second wireless communication module 210 receives the pressure data packet sent by the knee joint unicondylar pressure measuring device 300, and sends the pressure data packet to the data processing circuit 220; after receiving the pressure data packet, the data processing circuit 220 demodulates the pressure data packet to generate a pressure demodulation signal, and transmits the pressure demodulation signal as pressure display data to the terminal device 100 through the terminal communication interface 230. Specifically, the data processing circuit 220 may be a microprocessor.
Further, the receiver 200 further includes a second battery 240, and the second battery 240 is connected to the second wireless communication module 210, the data processing circuit 220 and the terminal communication interface 230, and is used for supplying power to the second wireless communication module 210, the data processing circuit 220 and the terminal communication interface 230.
In the embodiment provided by the invention, the knee joint unicondylar pressure measuring device comprises a pressure measuring head, a connecting part and a holding handle; the holding handle is connected with the pressure measuring head through a connecting part; the upper surface of the pressure measuring head is provided with a half-moon-shaped groove which is matched with the femoral unicondylar prosthesis; the pressure measuring head comprises a containing cavity, wherein a pressure sensor is arranged in the containing cavity and used for measuring the pressure born by the pressure measuring head and generating a pressure signal. In the operation of knee joint unicondylar replacement, after a femur unicondylar prosthesis and a tibia prosthesis are installed, the knee joint unicondylar pressure measuring device provided by the embodiment of the invention is placed in a joint gap between the femur unicondylar prosthesis and the tibia prosthesis, and the stress condition of the joint gap, namely the stress condition of a meniscus liner, is measured in real time, so that a pressure signal is generated. Therefore, a doctor can fully know the pressure size and the pressure distribution of the joint clearance according to the pressure signal in the operation process, the accuracy of positioning and size selection of the meniscus liner is improved, and the stress balance of the implanted knee joint prosthesis is ensured.
The knee joint unicondylar pressure measurement system provided by the embodiment of the invention has the same technical characteristics as the knee joint unicondylar pressure measurement device provided by the embodiment, so that the same technical problems can be solved, and the same technical effects are achieved.
It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working process of the knee unicondylar pressure measuring system described above may refer to the corresponding process in the aforementioned knee unicondylar pressure measuring apparatus embodiment, and will not be described herein again.
In addition, in the description of the embodiments of the present invention, 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 meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. A knee joint unicondylar pressure measuring device is characterized by comprising a pressure measuring head, a connecting part and a holding handle; the holding handle is connected with the pressure measuring head through the connecting part; the pressure measuring head is detachably connected with the connecting part;
the upper surface of the pressure measuring head is provided with a half-moon-shaped groove, and the groove is matched with the femoral unicondylar prosthesis; the pressure measuring head comprises an accommodating cavity, a pressure sensor is arranged in the accommodating cavity, and the pressure sensor is used for measuring the pressure born by the pressure measuring head and generating a pressure signal; the bottom of the pressure measuring head is connected with a plurality of heightening gaskets;
wherein the pressure is the pressure to which a meniscal pad needs to be installed between the femoral unicondylar prosthesis and the tibial prosthesis;
the pressure sensor is arranged in the handle, the processor is connected with the pressure sensor and used for receiving the pressure signal, processing the pressure signal and generating a pressure data packet, and the pressure data packet comprises pressure data.
2. The unicondylar knee pressure measurement device according to claim 1, wherein a first wireless communication module is further disposed inside the grip handle, and the processor sends the pressure data packet to a receiver corresponding to a terminal device through the first wireless communication module.
3. The knee unicondylar pressure measurement device of claim 2, wherein a first battery is further disposed inside the grip handle, the first battery powering the pressure sensor, the processor, and the first wireless communication module.
4. The knee unicondylar pressure measurement device according to claim 3, further comprising a power management chip disposed inside the grip handle, wherein the power management chip is connected to the first battery, and is configured to convert, distribute, and detect a power output signal of the first battery, generate a stable voltage signal, and transmit the stable voltage signal to the pressure sensor, the processor, and the first wireless communication module.
5. The knee unicondylar pressure measurement device of claim 3, wherein a display screen is disposed on an upper surface of the grip handle, the display screen being connected to the processor and the first battery for displaying the pressure data.
6. A knee unicondylar pressure measurement system comprising a terminal device, a receiver and the knee unicondylar pressure measurement device of any one of claims 1 to 5, the terminal device and the knee unicondylar pressure measurement device being respectively connected to the receiver.
7. The knee unicondylar stress measurement system of claim 6, wherein said receiver comprises a second wireless communication module, a data processing circuit and a terminal communication interface connected in series;
the second wireless communication module receives a pressure data packet and sends the pressure data packet to the data processing circuit;
the data processing circuit receives the pressure data packet, demodulates the pressure data packet to generate a pressure demodulation signal, and sends the pressure demodulation signal to the terminal communication interface so as to transmit the pressure demodulation signal to the terminal equipment;
the receiver further comprises a second battery, and the second battery supplies power to the second wireless communication module, the data processing circuit and the terminal communication interface.
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| CN201710620938.7A CN107242907B (en) | 2017-07-26 | 2017-07-26 | Knee joint unicondylar pressure measuring device and system |
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| CN201710620938.7A CN107242907B (en) | 2017-07-26 | 2017-07-26 | Knee joint unicondylar pressure measuring device and system |
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| CN107242907B true CN107242907B (en) | 2020-09-04 |
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| CN109758274B (en) * | 2019-02-28 | 2020-12-29 | 清华大学 | Method and system for measuring force line track of distal femur relative to prosthesis pad in unicondylar knee joint replacement |
| CN110542497A (en) * | 2019-10-15 | 2019-12-06 | 中国科学院电子学研究所 | meniscus-like distributed pressure sensor for knee replacement and method of making same |
| CN110974491B (en) * | 2019-12-19 | 2021-07-30 | 北京航空航天大学 | Knee joint unicondylar friction measuring device based on pressure measurement |
| CN111067675B (en) * | 2019-12-31 | 2021-05-04 | 牛依芃 | Knee joint unicondylar pressure and frictional force measuring device |
| CN111839840B (en) * | 2020-07-24 | 2021-07-30 | 北京市春立正达医疗器械股份有限公司 | Electronic force measuring device for soft tissue balance |
| CN112656552A (en) * | 2020-12-14 | 2021-04-16 | 清华大学 | Wireless portable force line track measuring system in single condyle knee joint replacement |
| CN113069222A (en) * | 2021-04-08 | 2021-07-06 | 太原理工大学 | Device and method for detecting pressure between bones in bone joint operation |
| CN114848245B (en) * | 2022-07-06 | 2022-09-06 | 北京大学 | Knee joint replacement gap balance measuring system, preparation method and measuring method |
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