Joint postoperative infection detection device

Abstract

The utility model belongs to the technical field of medical instruments, and particularly discloses a joint postoperative infection detection device. The joint postoperative infection detection device comprises a shell, a circuit board, a temperature sensor and a push needle, wherein the shell is provided with a mounting cavity; the circuit board is arranged in the mounting cavity; the temperature sensor is electrically connected with the circuit board, a detection head of the temperature sensor is located outside the shell, and the temperature sensor is used for acquiring temperature information of the contact body / implant; the pushing needle is arranged in the shell and has a protection state arranged outside the detection head and an avoiding state separated from the detection head. According to the joint infection detection device, a patient can conveniently detect the joint infection condition by himself / herself, and infection can be controlled in time.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical devices, and particularly relates to a detection device for joint postoperative infection. Background Technique

[0002] Periprosthetic Joint Infection (PJI) refers to the infection that occurs in the tissues around the prosthesis after artificial joint replacement surgery. As one of the most serious complications after artificial joint replacement, PJI brings a heavy economic burden to patients and seriously affects the postoperative joint function. Therefore, timely specific diagnosis and effective treatment measures in the early stage of PJI are of great significance for controlling the development of infection and secondary prosthesis replacement.

[0003] The diagnosis of PJI usually requires methods such as extracting joint cavity effusion and taking tissue from the infected site, and comprehensive evaluation is carried out in combination with laboratory tests, histopathology, microbiology, clinical manifestations and imaging, which is not conducive to patients' timely detection and timely control of infection. Summary of the Invention

[0004] The utility model aims to solve at least one of the technical problems in the related technologies to a certain extent. For this purpose, an embodiment of the utility model proposes a detection device for joint postoperative infection, which can facilitate patients to detect the joint infection situation by themselves and is beneficial to timely control of infection.

[0005] The detection device for joint postoperative infection in the embodiment of the utility model includes a housing, a circuit board, a temperature sensor and a push needle. The housing has an installation cavity; the circuit board is arranged in the installation cavity; the temperature sensor is electrically connected to the circuit board, and the detection head of the temperature sensor is located outside the housing. The temperature sensor is used to obtain the temperature information of the contact body / implant; the push needle is arranged on the housing, and the push needle has a protection state arranged outside the detection head and an avoidance state separated from the detection head.

[0006] In this embodiment, by arranging a temperature sensor in the housing, the temperature sensor obtains the temperature information of the detection position by contacting the skin or implanting into the body. The infection situation at the detection position is judged through the obtained temperature information. During the process of the temperature sensor contacting the skin or implanting into the body, the push needle protects the temperature sensor and assists the temperature sensor to be implanted into the body. When detecting, the push needle can be moved to separate the push needle from the detection head to avoid affecting the detection of the detection head. Thus, it is convenient for patients to detect the joint infection situation by themselves using the detection device for joint postoperative infection, quickly obtain the detection result, and is beneficial to timely control of infection.

[0007] In this embodiment, a receiving cavity extending along the length direction of the pushing needle is provided at one end of the pushing needle facing the detection head. In the protected state, the detection head is located in the receiving cavity, and the end face of the pushing needle facing the detection head is an inclined cut surface so that the end of the pushing needle forms a tip.

[0008] In this embodiment, an avoidance groove communicating with the receiving cavity is formed on the side wall of the pushing needle.

[0009] In this embodiment, a through hole is provided on the housing, and the detection head is coaxially arranged with the through hole. In the protected state, the pushing needle penetrates through the through hole and the detection head is located in the receiving cavity through the avoidance groove.

[0010] In this embodiment, the pushing needle includes a holding portion and a needle body connected to each other. The needle body penetrates through the through hole, and the outer diameter of the holding portion is larger than the outer diameter of the through hole so that the holding portion abuts against the outer wall of the housing.

[0011] In this embodiment, a limiting post is arranged in the housing, and a limiting hole corresponding to the limiting post is arranged on the circuit board. The limiting post is inserted into the limiting hole.

[0012] In this embodiment, the joint postoperative infection detection device further includes a fixing member. The fixing member is arranged at one end of the housing facing the detection head, and the fixing member is used to fix the housing at the detection position.

[0013] In this embodiment, the temperature sensor is a platinum resistance, and the package diameter of the temperature sensor is 0.8 mm to 1 mm.

[0014] In this embodiment, the circuit board includes a temperature measurement circuit. The temperature measurement circuit includes a Wheatstone bridge, and the platinum resistance is arranged on one arm of the Wheatstone bridge.

[0015] In this embodiment, the circuit board further includes a Bluetooth transmission circuit. The Bluetooth transmission circuit is electrically connected to the temperature sensor, and the Bluetooth transmission circuit is used to transmit the temperature information detected by the temperature sensor to the terminal. Description of the Drawings

[0016] Figure 1 is a perspective view of the joint postoperative infection detection device according to an embodiment of the present invention.

[0017] Figure 2 is an exploded view of the joint postoperative infection detection device according to an embodiment of the present invention.

[0018] Figure 3 is a perspective view of the pushing needle according to an embodiment of the present invention.

[0019] Figure 4 It is a perspective view of the first housing of the embodiment of the present utility model.

[0020] Figure 5 It is a partial structural schematic diagram of the temperature sensor of the embodiment of the present utility model.

[0021] Figure 6 It is a perspective view of the second housing of the embodiment of the present utility model.

[0022] Figure 7 It is a structural schematic diagram of the temperature measurement circuit of the embodiment of the present utility model.

[0023] Figure 8 It is a structural schematic diagram of the power-on and power-off circuit of the embodiment of the present utility model.

[0024] Reference numerals:

[0025] 1, housing; 11, first housing; 12, second housing; 13, through hole; 2, circuit board; 3, temperature sensor; 4, push needle; 41, accommodation cavity; 42, avoidance groove; 43, holding portion; 44, needle body; 5, limit post; 6, fixing member; 7, temperature measurement circuit; 71, Wheatstone bridge; 711, first bridge arm; 712, second bridge arm; 713, third bridge arm; 714, fourth bridge arm; 72, operational amplifier; 8, power-on and power-off circuit; 81, power supply; 82, controller; 83, single-pole double-throw switch. Detailed implementation manners

[0026] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present utility model, and should not be construed as a limitation to the present utility model.

[0027] In this embodiment, as shown in Figure 1 and Figure 2 , the joint postoperative infection detection device includes a housing 1, a circuit board 2, a temperature sensor 3 and a push needle 4. The housing 1 has an installation cavity; the circuit board 2 is disposed in the installation cavity; the temperature sensor 3 is electrically connected to the circuit board 2, and the detection head of the temperature sensor 3 is located outside the housing 1. The temperature sensor 3 is used to obtain the temperature information of the contact body / implant; the push needle 4 is disposed in the housing 1, and the push needle 4 has a protection state disposed outside the detection head and an avoidance state of disengaging from the detection head.

[0028] For example, as shown in Figure 2 , Figure 4 and Figure 6As shown, the housing 1 includes a first housing 111 and a second housing 121. The first housing 111 includes a first end plate and a first side plate surrounding the circumference of the end plate. The second housing 121 includes a second end plate and a second side plate surrounding the circumference of the second end plate. The second side plate is inserted into the first side plate. The outer wall of the second side plate and the inner wall of the first side plate can be connected by means such as snap connection, bonding, or screw connection, so as to form an installation cavity between the first housing 111 and the second housing 121. Both the first end plate and the second end plate can be circular. Of course, the first end plate and the second end plate can also be set to other shapes, which are not limited here.

[0029] It should be noted that the temperature sensor 3 is used to obtain the temperature information of the contact body / implant means that the temperature sensor 3 can obtain the temperature information by contacting the skin or implanting into the body. The way for the temperature sensor 3 to obtain the temperature can be set according to needs, which is not limited here.

[0030] In this embodiment, by arranging the temperature sensor 3 in the housing 1, the temperature sensor 3 obtains the temperature information of the detection position by contacting the skin or implanting into the body. The infection situation at the detection position is judged through the obtained temperature information. And during the process of the temperature sensor 3 contacting the skin or implanting into the body, the pusher needle 4 protects the temperature sensor 3 and assists the temperature sensor 3 to be implanted into the body. When detecting, the pusher needle 4 can be moved so that the pusher needle 4 is separated from the detection head to avoid affecting the detection of the detection head. Thus, it is convenient for the patient to use the joint postoperative infection detection device by himself to detect the joint infection situation and quickly obtain the detection result, which is beneficial to timely control of the infection.

[0031] In this embodiment, as Figure 1 and Figure 3 shown, a receiving cavity 41 extending along the length direction of the pusher needle 4 is provided at one end of the pusher needle 4 facing the detection head. In the protection state, the detection head is located in the receiving cavity 41, and the end face of the pusher needle 4 facing the detection head is an inclined section so that the end of the pusher needle 4 forms a tip.

[0032] It can be understood that by arranging the receiving cavity 41 in the needle body 44, in the protection state, the detection head is arranged in the receiving cavity 41, the detection head is protected by the outer wall of the receiving cavity 41, and the end face of the pusher needle 4 is set as an inclined section so that the end of the pusher needle 4 forms a tip. The pusher needle 4 can be inserted into the body to drive the detection head to be inserted into the body. After the pusher needle 4 is brought into the body, the pusher needle 4 is removed from the body, so that the detection head can perform temperature detection in the body.

[0033] In this embodiment, as Figure 3 shown, an avoidance groove 42 communicating with the receiving cavity 41 is formed on the side wall of the pusher needle 4.

[0034] It should be noted that since one end of the temperature sensor 3 generally needs to be directly connected to the circuit board 2 or connected through a wire, when the push needle 4 is pushed towards the temperature sensor 3, the end of the temperature sensor 3 connected to the circuit board 2 will interfere with the pushing of the push needle 4. By providing an avoidance groove 42 on the side wall of the push needle 4, the connection end of the temperature sensor 3 can be avoided, and there is no need to provide an extended wire between the temperature sensor 3 and the circuit board 2 for avoidance, which is beneficial to making the overall structure more compact.

[0035] In this embodiment, as Figure 1 and Figure 2 shown, a through hole 13 is provided on the housing 1, and the detection head is coaxially arranged with the through hole 13. In the protection state, the push needle 4 passes through the through hole 13 and the detection head is located in the accommodation cavity 41 through the avoidance groove 42.

[0036] Specifically, when the position of the through hole 13 is opposite to the circuit board 2, an avoidance hole can be provided at the position of the circuit board 2 corresponding to the through hole 13 to facilitate the push needle 4 to pass through the circuit board 2. In addition, as Figure 2 and 5 shown, the detection head can be coaxially arranged with the through hole 13 by bending the temperature sensor 3.

[0037] It can be understood that by providing the through hole 13 on the housing 1, the push needle 4 can be guided through the through hole 13. In addition, the detection head and the through hole 13 are coaxially arranged. During the process of pushing the push needle 4 in the through hole 13, the push needle 4 can be pushed to the outside of the detection head, so that the sensor can be protected by the push needle 4. Or when the push needle 4 is inserted into the body, the detection head can be inserted into the body at the same time, and the push needle 4 can be removed along the reverse direction of insertion into the body, without moving the push needle 4 in other directions, which is beneficial to reducing the pain at the detection site.

[0038] In this embodiment, as Figure 2 and Figure 3 shown, the push needle 4 includes a holding portion 43 and a needle body 44 connected to each other. The needle body 44 passes through the through hole 13, and the outer diameter of the holding portion 43 is larger than the outer diameter of the through hole 13, so that the holding portion 43 abuts against the outer wall of the housing 1.

[0039] The holding portion 43 is arranged on the side of the housing 1 away from the detection head. During detection, the side of the housing 1 facing the detection head can be attached to the skin, which can facilitate fixing the housing 1 on the skin during detection, making the detection process more convenient and beneficial to improving the user experience.

[0040] Specifically, the gripping portion 43 includes a crimping section and a transition section connected to each other, the needle body 44 is connected to the transition section, and the outer diameter of the crimping section is larger than the diameter of the transition section. When operating the push needle 4, the transition section can be held and abutted against the hand, which is conducive to stably holding the push needle 4 and reducing slipping. The diameter of the transition section is larger than the diameter of the through hole 13, and the transition section can be abutted against the housing 1, so that when the push needle 4 is pushed relative to the housing 1, the push needle 4 can be limited.

[0041] It can be understood that the push needle 4 includes a holding portion 43. When performing detection, the operation can be performed by holding the holding portion 43, which can make the operation more convenient. The outer diameter of the holding portion 43 is larger than the outer diameter of the through hole 13. When the push needle 4 moves relative to the shell 1, the push needle 4 can be limited, so as to timely confirm whether the push needle 4 has moved into place.

[0042] In this embodiment, if Figure 2 and Figure 4 As shown, a limiting post 5 is arranged in the housing 1, and a limiting hole is arranged in the circuit board 2 corresponding to the limiting post 5, and the limiting post 5 is inserted in the limiting hole.

[0043] Specifically, the limiting column 5 is disposed on the inner wall of the housing 1 and can be integrally formed with the housing 1 , which is beneficial for increasing the strength of the limiting column 5 .

[0044] It can be understood that by setting a limit column 5 in the shell 1 and setting a limit hole corresponding to the limit column 5 on the circuit board 2, the circuit board 2 is positioned when installing through the cooperation of the limit column 5 and the limit hole, which facilitates the subsequent installation and positioning of related components.

[0045] In this embodiment, if Figure 2 As shown, the joint surgery infection detection device further includes a fixing member 6, which is disposed at one end of the housing 1 facing the detection head, and is used to fix the housing 1 at a detection position.

[0046] For example, the fixing member 6 is an adhesive sticker, which can be a medical adhesive sticker to reduce the adverse effects of the adhesive sticker on the skin. The adhesive sticker can facilitate the fixing of the housing 1 on the skin and is easy to remove from the skin. It is easy to use and is conducive to improving the user experience. Specifically, both sides of the adhesive sticker are sticky, one side is attached to the housing 1, and the other side can be attached to the skin. The fixing member 6 can also be set as a structure such as a strap, and the specific form of the fixing member 6 can be set as needed, which is not limited here.

[0047] It can be understood that, by providing the adhesive sticker, the housing 1 can be fixed on the skin using the fixing member 6 during detection, making the detection process more convenient.

[0048] In this embodiment, the temperature sensor 3 is a platinum resistor, and the package diameter of the temperature sensor 3 is 0.8 mm to 1 mm.

[0049] For example, the package diameter of the sensor can be 0.8 mm, 0.85 mm, 0.9 mm, 0.95 mm, or 1 mm, etc. If the package diameter of the temperature sensor 3 is too small, it is not conducive to packaging. If the package diameter of the temperature sensor 3 is too large, it is easy to cause pain at the detection position. Further, the package length of the temperature sensor 3 is 5 mm to 7 mm. For example, the package length of the temperature sensor 3 can be 5 mm, 6 mm, or 7 mm, etc. Without the need for extension through a wire under the condition of meeting the usage requirements, it is convenient for installation.

[0050] In this embodiment, the temperature sensor 3 is set as a platinum resistor. The resistance value of the platinum resistor changes with temperature. By measuring its resistance value, the temperature of the object to be measured can be deduced, which is conducive to accurate temperature detection. Setting the package diameter of the platinum resistor to 0.8 mm to 1 mm is convenient for packaging while reducing the pain at the detection position. Of course, those skilled in the art can also set the temperature sensor 3 in other forms, which is not limited herein.

[0051] In this embodiment, as Figure 7 shown, the circuit board 2 includes a temperature measurement circuit 7. The temperature measurement circuit 7 includes a Wheatstone bridge 71, and the platinum resistor is disposed on one arm of the Wheatstone bridge 71.

[0052] Specifically, as Figure 7 shown, the temperature measurement circuit 7 further includes an operational amplifier 72. Resistors with a resistance value of R6 are respectively disposed on the first arm 711 and the second arm 712 of the Wheatstone bridge 71, a resistor with a resistance value of R6 is disposed on the third arm 713, and the platinum resistor is disposed on the fourth arm 714. Two input terminals of the operational amplifier 72 are respectively connected to the node between the first arm 711 and the third arm 713 and the node between the second arm 712 and the fourth arm 714, so that the signal difference can be amplified by the operational amplifier 72, enhancing the signal strength, improving the overall accuracy and stability of the system, and being conducive to realizing high-precision measurement. For example, the model of the operational amplifier 72 can be AD623.

[0053] It can be understood that the temperature measurement circuit 7 in this embodiment includes a Wheatstone bridge 71. By disposing the platinum resistor on one arm of the Wheatstone bridge 71, when the temperature changes, the bridge is no longer balanced, and the output voltage of the bridge will change accordingly. The temperature value can be deduced based on the change in the voltage value.

[0054] In this embodiment, the circuit board 2 further includes a Bluetooth transmission circuit (not shown in the figure). The Bluetooth transmission circuit is electrically connected to the temperature sensor 3 and is used to transmit the temperature information detected by the temperature sensor 3 to the terminal.

[0055] Specifically, the terminal can be a mobile phone, an iPad, a computer, or the like. The specific structure of the Bluetooth circuit is a conventional existing technology, and those skilled in the art can select it according to needs, which will not be elaborated here.

[0056] It can be understood that in this embodiment, by setting the Bluetooth transmission circuit to transmit the temperature information to the terminal, it is convenient for the operator to intuitively obtain the detection result, which is beneficial to improving the user experience.

[0057] In this embodiment, as Figure 8 shown, the circuit board 2 further includes a power-on / off circuit 8. The power-on / off circuit 8 is electrically connected to the temperature sensor 3 and is used to control the on / off of the temperature sensor 3.

[0058] Specifically, as Figure 8 shown, the power-on / off circuit 8 includes a power supply 81, a controller 82, and a single-pole double-throw switch 83 that are electrically connected. When one position of the single-pole double-throw switch 83 is connected to the VCOM position, the voltage on the P_Hold pin of the controller 82 becomes high level, thereby allowing the power supply 81 to continue supplying power. When the switch is switched to the GND position, the voltage on the P_Hold pin becomes low level, causing the power supply 81 to stop supplying power. The model of the controller 82 can be the MAX4715 chip. During the process of the switch moving from the VCOM position to the GND position, the power supply 81 will not be immediately turned off, but will be turned off after a delay, which can avoid the impact on the system due to sudden power-off.

[0059] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0060] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0061] In the present utility model, unless otherwise clearly defined and limited, terms such as "installed", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or communicable with each other; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0062] In the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0063] In the present utility model, terms such as "an embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0064] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present utility model.

Claims

1. An infection detection device for after joint surgery, characterized in that, Comprising: A housing having an installation cavity; A circuit board disposed in the installation cavity; A temperature sensor electrically connected to the circuit board, and a detection head of the temperature sensor is located outside the housing, and the temperature sensor is used to obtain temperature information of a contact body / implant; A push needle disposed in the housing, the push needle having a protection state in which it is disposed outside the detection head and an avoidance state in which it is separated from the detection head.

2. The joint postoperative infection detection device according to claim 1, wherein One end of the push needle facing the detection head is provided with a receiving cavity extending along the length direction of the push needle. In the protection state, the detection head is located in the receiving cavity, and an end face of the push needle facing the detection head is an inclined section so that the end of the push needle forms a tip.

3. The joint postoperative infection detection device according to claim 2, wherein, An avoidance groove communicating with the receiving cavity is formed in a side wall of the push needle.

4. The joint postoperative infection detection device according to claim 3, wherein A through hole is provided in the housing, and the detection head is coaxially arranged with the through hole. In the protection state, the push needle penetrates through the through hole and enables the detection head to be located in the receiving cavity through the avoidance groove.

5. The joint postoperative infection detection device according to claim 4, wherein The push needle includes a holding portion and a needle body connected to each other. The needle body penetrates through the through hole, and an outer diameter of the holding portion is larger than an outer diameter of the through hole so that the holding portion abuts against an outer wall of the housing.

6. The joint postoperative infection detection device according to claim 1, wherein A limiting post is arranged in the housing, and a limiting hole corresponding to the limiting post is arranged on the circuit board, and the limiting post is inserted into the limiting hole.

7. The joint postoperative infection detection device according to claim 1, wherein, Further comprising a fixing member disposed at one end of the housing facing the detection head, and the fixing member is used to fix the housing at a detection position.

8. The joint postoperative infection detection device according to any one of claims 1 to 7, characterized in that, The temperature sensor is a platinum resistance, and a packaging diameter of the temperature sensor is 0.8 mm to 1 mm.

9. The joint postoperative infection detection device according to claim 8, wherein, The circuit board includes a temperature measurement circuit, and the temperature measurement circuit includes a Wheatstone bridge, and the platinum resistance is disposed on one arm of the Wheatstone bridge.

10. The joint postoperative infection detection device according to any one of claims 1 to 7, characterized in that, The circuit board further includes a Bluetooth transmission circuit electrically connected to the temperature sensor, and the Bluetooth transmission circuit is used to transmit the temperature information detected by the temperature sensor to a terminal.

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