WO2023030254A1

WO2023030254A1 - Gap gauge having knee joint pressure measurement function

Info

Publication number: WO2023030254A1
Application number: PCT/CN2022/115514
Authority: WO
Inventors: 徐志宏; 钱坤; 黄志俊
Original assignee: 南京鼓楼医院
Priority date: 2021-08-30
Filing date: 2022-08-29
Publication date: 2023-03-09

Abstract

The present invention provides a gap gauge having a knee joint pressure measurement function, comprising a pressure measurement module and a signal conversion module that are signally connected to each other. The pressure measurement module measures pressure received by a knee joint upon stretching or flexing, and sends a detected signal to the signal conversion module. The signal conversion module converts the received signal into a pressure digital display signal for display. According to the present invention, a pressure sensor is added to a conventional gap gauge, such that upon measuring a knee joint gap, not only can the thickness between knee joints be measured, but also the pressure received by the knee joint upon stretching or flexing can further be accurately displayed on a crystal screen to quantify the pressure on the knee joint, thereby reducing surgical barriers while greatly increasing the accuracy of pressure measurement.

Description

A gap gauge with knee joint pressure detection function

technical field

The invention relates to the technical field of gap gauges, in particular to a gap gauge with the function of detecting knee joint pressure.

Background technique

In traditional surgery, the gap ruler can only measure the knee joint gap, and the pressure between the joints can only be judged by the doctor's years of experience. The disadvantage is that it is too dependent on the doctor's feel and requires years of experience to judge Inaccurate; there are high surgical barriers, and young doctors are restricted.

Contents of the invention

In order to solve the above problems, the present invention discloses a gap ruler with a knee joint pressure detection function. When measuring the knee joint gap, it can not only measure the thickness between the knee joints, but also accurately measure the pressure on the knee joint when the knee is stretched or flexed. Displayed on the crystal screen, the knee joint pressure is quantified.

The specific plan is as follows:

A gap ruler with a knee joint pressure detection function is characterized in that: it includes a pressure detection module and a signal conversion module connected with each other, the pressure detection module detects the pressure received when the knee joint is stretched or flexed, and converts the detected signal The signal is sent to the signal conversion module, and the signal conversion module converts the received signal into a pressure digital display signal for display.

As a further improvement of the present invention, the pressure detection module includes a pressure plate, an upper cover and a lower cover that are sequentially assembled and combined from top to bottom. There is a gap between the pressure plate and the upper cover that the pressure plate moves up and down under force. A pressure transmission block and a pressure diaphragm are arranged between the upper cover and the lower cover. The upper end of the pressure transmission block passes through the upper cover and is connected with the bottom of the pressure plate. The pressure diaphragm is fitted on the bottom of the pressure transmission block. , and connected to the signal conversion module through a signal cable.

As a further improvement of the present invention, the pressure plate is a plate-shaped structure, and its bottom is provided with a mounting bump, and the middle part of the bottom surface of the mounting bump is provided with a slot, and the upper cover is a plate-shaped structure. The corresponding position of the mounting bump is provided with a matching perforation. The pressure transmission block is a stepped cylindrical structure with a small upper part and a larger lower part. Its upper end is fitted in the slot of the mounting bump. There is a mounting groove for accommodating the pressure transmission block and the pressure diaphragm.

As a further improvement of the present invention, a first silicone ring is embedded between the edges of the upper cover and the lower cover.

As a further improvement of the present invention, the pressure plate, the upper cover and the lower cover are installed and fixed through four distributed screws, wherein the pressure plate can move up and down within the range of the gap relative to the screws, and the upper cover and the lower cover connect the first The silicone ring is pressed tightly.

As a further improvement of the present invention, the signal conversion module includes an upper case and a lower case arranged up and down, a crystal screen for display is embedded on the upper case, a receiving module, a second A signal processor and a second signal processor, the first signal processor collects the current signal flowing through the pressure diaphragm through the receiving module, and sends it to the second signal processor, and the second signal processor converts the current signal Convert it into a pressure digital display signal and send it to the crystal screen for display.

As a further improvement of the present invention, a second silicone ring is embedded between the edges of the upper shell and the lower shell.

As a further improvement of the present invention, the signal cable jacket is provided with a supporting shell, and the two ends of the supporting shell are respectively fixedly connected with the lower cover and the lower shell, and the lower cover and the lower shell are respectively provided with a signal cable hole through.

The beneficial effect of the present invention is that: a pressure sensor is added on the basis of the traditional gap ruler. When measuring the knee joint gap, not only the thickness between the knee joints can be measured, but also the pressure on the knee joint when the knee is stretched or flexed can be accurately displayed on the On the crystal screen, the pressure of the knee joint is quantified, thereby greatly increasing the accuracy of pressure detection and lowering the surgical barrier.

Description of drawings

Fig. 1 is the overall schematic diagram of the present invention.

Fig. 2 is a top exploded view of the pressure detection module.

Fig. 3 is a bottom exploded view of the pressure detection module.

Fig. 4 is a schematic diagram of the lower case in the signal conversion module.

Fig. 5 is a schematic diagram of the principle of the present invention.

List of reference signs:

1-pressure plate, 2-upper cover, 3-lower cover, 4-pressure transmission block, 5-pressure diaphragm, 6-installation bump, 7-installation groove, 8-first silicone ring, 9-upper shell, 10-lower shell, 11-crystal screen, 12-second silicone ring, 13-supporting shell.

Detailed ways

The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

As shown in the figure, a gap gauge with a knee joint pressure detection function is characterized in that it includes a pressure detection module and a signal conversion module connected to each other by signals, the pressure detection module detects the pressure received when the knee joint is extended or flexed, and detects The received signal is sent to the signal conversion module, and the signal conversion module converts the received signal into a pressure digital display signal for display.

In this embodiment, the pressure detection module includes a pressure plate 1, an upper cover 2 and a lower cover 3 that are sequentially assembled from top to bottom. There is a gap between the pressure plate 1 and the upper cover 2 for the pressure plate 1 to move up and down under force. A pressure transmission block 4 and a pressure diaphragm 5 are provided between the upper cover 2 and the lower cover 3. The upper end of the pressure transmission block 4 passes through the upper cover 2 and is connected with the bottom of the pressure plate 1. The pressure diaphragm 5 is installed in the pressure transmission The bottom of block 4, and connect with the signal conversion module through the signal cable.

Wherein, the pressure plate 1 is a plate-shaped structure, and its bottom is provided with a mounting bump 6, and the middle part of the bottom surface of the mounting bump 6 is provided with a slot. There is a matching perforation at the position. The pressure transmission block 4 is a stepped cylindrical structure with a small upper part and a larger lower part. Block 4 and mounting groove 7 for pressure diaphragm 5 .

In this embodiment, a first silicone ring 8 is embedded between the edges of the upper cover 2 and the lower cover 3, and the pressure plate 1, the upper cover 2 and the lower cover 3 are installed and fixed by four distributed screws, wherein the pressure plate 1 can move up and down within the range of the gap relative to the screw, and the upper cover 2 and the lower cover 3 press the first silicone ring 8 tightly.

In this embodiment, the signal conversion module includes an upper case 9 and a lower case 10 arranged up and down, the upper case 9 is embedded with a crystal screen 11 for display, and a receiving module, a first A signal processor and a second signal processor, the first signal processor collects the current signal flowing through the pressure diaphragm 5 through the receiving module, and sends it to the second signal processor, and the second signal processor converts the current signal into a pressure value Display the signal and send it to the crystal screen 11 for display. Wherein, a second silicone ring 12 is embedded between the edges of the upper shell 9 and the lower shell 10 .

In this embodiment, the signal cable jacket is provided with a supporting shell 13, and the two ends of the supporting shell 13 are fixedly connected with the lower cover 3 and the lower shell 10 respectively, and the lower cover 3 and the lower shell 10 are respectively provided with a support for the signal cable to pass through. through the hole.

The present invention adds a pressure sensor to the traditional gap ruler, and then when measuring the knee joint gap, it can not only measure the thickness between the knee joints, but also accurately display the pressure on the knee joint when the knee is stretched or flexed on the crystal screen, and the knee Joint pressure quantification; Among them, the working principle of the pressure conversion module is: when there is no pressure on the pressure diaphragm, it is an infinite resistance, and the current tends to be infinitely small. When an external force is applied, the resistance decreases, the current increases, and the pressure increases. Larger, the smaller the resistance, the greater the current. After the current passes through the high-precision sampling resistor, it will be converted into a sampleable voltage value. After passing through the adc module, the corresponding voltage analog value can be converted into a digital value, that is, a pressure value. The controller can convert this The pressure value is displayed bit by bit on the crystal screen; in addition, the present invention can measure the pressure between the knee joints more accurately by enlarging the area of the pressure sensor; silicone rings are respectively added to the shells of the pressure detection module and the signal conversion module , in order to achieve a better waterproof effect. The technical means disclosed in the solutions of the present invention are not limited to the technical means disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be pointed out that those skilled in the art can make some improvements and modifications without departing from the principle of the present invention, and these improvements and modifications are also regarded as the protection scope of the present invention.

Claims

A gap ruler with a knee joint pressure detection function is characterized in that: it includes a pressure detection module and a signal conversion module connected with each other, the pressure detection module detects the pressure received when the knee joint is stretched or flexed, and converts the detected signal The signal is sent to the signal conversion module, and the signal conversion module converts the received signal into a pressure digital display signal for display.
A gap gauge with knee joint pressure detection function according to claim 1, characterized in that: the pressure detection module includes a pressure plate (1), an upper cover (2) and a lower cover (2) assembled sequentially from top to bottom Cover (3), there is a gap between the pressure plate (1) and the upper cover (2) for the pressure plate (1) to move up and down under force, and a pressure gap is provided between the upper cover (2) and the lower cover (3). The transmission block (4) and the pressure diaphragm (5), the upper end of the pressure transmission block (4) passes through the upper cover (2) and is connected with the bottom of the pressure plate (1), and the pressure diaphragm (5) Fittingly installed on the bottom of the pressure transmission block (4), and connected with the signal conversion module through the signal cable.
A gap gauge with knee joint pressure detection function according to claim 2, characterized in that: the pressure plate (1) is a plate-shaped structure, and its bottom is provided with a mounting bump (6), and the mounting bump The middle part of the bottom surface of the block (6) is provided with a slot, and the upper cover (2) is a plate-shaped structure, and the corresponding position of the upper cover (2) and the mounting bump (6) is provided with a perforation that matches it. The pressure transmission block (4) is a stepped cylindrical structure with a small top and a large bottom, and its upper end is fitted in the slot of the mounting bump (6). The middle part of the lower cover (3) is provided with a pressure transmission block (4) and the mounting groove (7) for the pressure diaphragm (5).
The gap gauge with knee joint pressure detection function according to claim 3, characterized in that: a first silicone ring (8) is embedded between the edges of the upper cover (2) and the lower cover (3).
A gap gauge with knee joint pressure detection function according to claim 4, characterized in that: said pressure plate (1), upper cover (2) and lower cover (3) are installed through four distributed screws Fixing, wherein, the pressure plate (1) can move up and down within the range of the gap relative to the screw, and the upper cover (2) and the lower cover (3) compress the first silicone ring (8).
A kind of gap ruler with knee joint pressure detection function according to claim 2, characterized in that: said signal conversion module comprises an upper shell (9) and a lower shell (10) arranged up and down, said upper shell (9) ) is embedded with a crystal screen (11) for display, a receiving module, a first signal processor and a second signal processor are arranged between the upper shell (9) and the lower shell (10), and the first signal The processor collects the current signal flowing through the pressure diaphragm (5) through the receiving module, and sends it to the second signal processor, and the second signal processor converts the current signal into a pressure digital display signal and sends it to the crystal screen (11 )show.
The gap gauge with knee joint pressure detection function according to claim 6, characterized in that: a second silicone ring (12) is embedded between the edges of the upper shell (9) and the lower shell (10).
A kind of gap gauge with knee joint pressure detection function according to claim 6, characterized in that: the signal cable jacket is provided with a support housing (13), and the two ends of the support housing (13) are respectively connected to The lower cover (3) and the lower case (10) are fixedly connected, and the lower cover (3) and the lower case (10) are respectively provided with openings for passing signal cables.