A medical pressure sensing device

Abstract

This application discloses a medical pressure sensing device, including a double-layered shell, a top cover, a pressure-sensing module, and a thin-film pressure sensor. The double-layered shell contains an accommodating space and a horizontally placed support plate. A first hole is provided on the support plate, dividing the accommodating space into a first space and a second space. The first space accommodates the pressure-sensing module and the thin-film pressure sensor. The thin-film pressure sensor includes a pressure-measuring part, a connecting part, and a signal transmission part connected in sequence. The pressure-measuring part is located on the upper surface of the support plate, and the pressure-sensing module is located on the upper surface of the pressure-measuring part. The connecting part passes through the first hole into the second space, and the signal transmission part extends out of the double-layered shell through a through-hole on one side of the second space, connecting to an external pressure display to show the tube wall pressure value. This medical pressure sensing device has low cost, can measure the tube wall pressure value without contact with the liquid medication, is easy to disassemble and maintain, and is reusable. It also has advantages such as small size, accurate pressure measurement, and stable signal transmission.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and more specifically, to a medical pressure sensing device. Background Technology

[0002] With the continuous improvement of people's living standards and the increasing abundance of material resources, the incidence of vascular diseases has significantly increased compared to the past. Monitoring the flow or pressure of medical tubing used to treat these diseases allows for direct observation of blockages or leaks within the tubing. In many scenarios, this can alert medical personnel and prevent serious medical accidents. As a result, flow monitoring or pressure monitoring of medical tubing has gradually become a focus of attention, especially since the medical industry often requires pressure sensing devices to have many limitations, such as zero contact with the medication, easy disassembly and maintenance, and reusability.

[0003] Existing flow sensors, both domestically and internationally, have many shortcomings in monitoring flow in small-diameter pipes. They often use ultrasonic sensors to monitor the flow inside the pipe, which is often quite expensive. Lower-cost sensors require breaking the pipe at the monitoring point (cutting off the connecting pipe) to insert the sensor inside for monitoring, which makes it difficult to meet the sterile environment required by the medical industry. Moreover, because they come into contact with the liquid medicine, they need to be used and discarded immediately, and cannot be reused, resulting in a huge waste of resources.

[0004] In summary, most medical tubing pressure sensing devices currently on the market have problems such as needing to be in direct contact with the liquid medication, being expensive, having a complex structure that is not easy to repair or disassemble, and not being able to be reused multiple times. Therefore, they cannot directly meet the multiple medical requirements in medical scenarios, such as zero contact with the liquid medication, easy disassembly, low cost, and reusability. Utility Model Content

[0005] One objective of this application is to provide a medical pressure sensing device that can at least solve the aforementioned technical problems in the prior art. To achieve the above objective, this application provides the following technical solution.

[0006] According to the first aspect of this application, a medical pressure sensing device for testing the pressure value of a medical hose wall includes a double-layered shell, a top cover, a pressure sensing module, and a thin-film pressure sensor. The double-layered shell has an accommodating space and a horizontally placed support plate. The support plate has a first hole, which divides the accommodating space into a first space and a second space. The first space is located above the second space and is used to accommodate the pressure sensing module and the thin-film pressure sensor. The thin-film pressure sensor includes a pressure measuring part, a connecting part, and a signal transmission part connected in sequence. The pressure measuring part is mounted on the upper surface of the support plate, and the pressure sensing module is mounted on the upper surface of the pressure measuring part. The connecting part passes through the first hole into the second space, and the signal transmission part extends out of the double-layered shell through a through hole on one side of the second space, so that an external pressure display is connected to the signal transmission part and displays the pressure value of the medical hose wall measured by the pressure measuring part.

[0007] Optionally, the top cover has a placement slot adapted to the shape of the medical tubing.

[0008] Optionally, one end of the top cover is movably connected to the double-layer shell, and the other end of the top cover is provided with a connecting buckle. The double-layer shell is provided with a protrusion. When the top cover is in the closed state, the connecting buckle is engaged and fixed with the protrusion.

[0009] Optionally, the pressure-sensing module includes a first pressure-sensing element and a second pressure-sensing element embedded in the first pressure-sensing element.

[0010] Optionally, the double-layer shell has a fixing part in the first space, and the first pressure-sensing element has mounting parts at both ends, with the mounting parts docking with the fixing part.

[0011] Optionally, the support plate is provided with a boss that supports the first pressure-sensing component.

[0012] Optionally, the upper surfaces of the first pressure-sensing element and the second pressure-sensing element are provided with placement grooves adapted to the shape of the medical tubing, and the upper surface of the second pressure-sensing element is higher than the upper surface of the first pressure-sensing element.

[0013] Optionally, a silicone disc is provided on the upper surface of the pressure measuring part.

[0014] Optionally, the two ends of the double-layer shell are respectively provided with a first extension and a second extension, the first extension and the second extension are provided with a receiving space and communicate with the second space, and a through hole is provided on the side of one of the first extension and the second extension.

[0015] Optionally, the medical pressure sensing device also includes a bottom cover plate, on the side of the bottom cover plate facing the support plate, there are four mounting columns, the mounting columns are provided with internal threads, and there are four through holes on the double-layer housing corresponding to the mounting columns, and the bottom cover plate and the double-layer housing are fixed together by screws screwed into the through holes.

[0016] The medical pressure sensing device of this application includes a double-layered housing, a top cover, a pressure-sensing module, and a thin-film pressure sensor. The double-layered housing contains an accommodating space and a horizontally placed support plate. A first hole is provided on the support plate, dividing the accommodating space into a first space and a second space. The first space is located above the second space and is used to accommodate the pressure-sensing module and the thin-film pressure sensor. The thin-film pressure sensor includes a pressure-measuring part, a connecting part, and a signal transmission part connected in sequence. The pressure-measuring part is mounted on the upper surface of the support plate, and the pressure-sensing module is mounted on the upper surface of the pressure-measuring part. The connecting part passes through the first hole into the second space, and the signal transmission part extends out of the double-layered housing through a through-hole on one side of the second space, allowing an external pressure display to connect to the signal transmission part and display the pressure value. Therefore, the thin-film pressure sensor used in the medical pressure sensing device of this application has relatively low cost and can measure the pressure value of the medical tubing wall without contacting the liquid in the test tubing, offering good economic efficiency and convenience. Furthermore, the medical pressure sensing device provided by this application is easy to disassemble for later maintenance, is fully reusable, and also has advantages such as small size, accurate pressure measurement, and stable transmission of the pressure measurement electrical signal.

[0017] Other features and advantages of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present application and, together with their description, serve to explain the principles of the present application.

[0019] Figure 1 This is a three-dimensional structural schematic diagram of a medical pressure sensing device according to an embodiment of this application;

[0020] Figure 2 This is a three-dimensional structural schematic diagram of a medical pressure sensing device according to another embodiment of this application;

[0021] Figure 3 A left view of a medical pressure sensing device according to another embodiment of this application;

[0022] Figure 4 This is a three-dimensional structural schematic diagram of a medical pressure sensing device according to another embodiment of this application;

[0023] Figure 5 This is a perspective structural diagram of the bottom cover plate according to another embodiment of the present application;

[0024] Figure 6 An exploded view of the internal structure of a medical pressure sensing device with a hidden double-layer housing according to another embodiment of this application;

[0025] Figure 7This is a three-dimensional structural schematic diagram of a pressure-sensing module according to another embodiment of this application;

[0026] Figure 8 A bottom view of a first pressure-sensing element according to another embodiment of this application;

[0027] Figure 9 A bottom view of a medical pressure sensing device according to another embodiment of this application, with the bottom cover hidden.

[0028] Attached icon number

[0029] 1000 medical pressure sensing devices;

[0030] Double-layer shell 100; support plate 101; first hole 102; through hole 103; protrusion 104; fixing part 105; boss 106; first extension 107; second extension 108; protrusion 109;

[0031] Top cover 200; placement slot 201; connecting buckle 202;

[0032] Pressure sensing module 300; first pressure sensing element 301; mounting part 302; second pressure sensing element 303; placement groove 304; recessed space 305; mounting block 306;

[0033] Thin-film pressure sensor 400; pressure measuring part 401; connecting part 402; signal transmission part 403; silicone disc 404;

[0034] Bottom cover plate 500; mounting column 501. Detailed Implementation

[0035] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present application.

[0036] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the scope of this application and its application or use.

[0037] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0038] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0039] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0040] A medical pressure sensing device 1000 according to an embodiment of this application is described in detail below with reference to the accompanying drawings.

[0041] In one embodiment of this application, the medical pressure sensing device 1000 provided in this application can be used to test the wall pressure value of a medical tubing. The medical pressure sensing device 1000 includes a double-layer housing 100, a top cover 200, a pressure sensing module 300, and a thin-film pressure sensor 400. The double-layer housing 100 has an accommodating space and a horizontally placed support plate 101. A first hole 102 is formed on the support plate 101. The support plate 101 divides the accommodating space into a first space and a second space. The first space is located above the second space and is used to accommodate the pressure sensing module 300 and the thin-film pressure sensor 400. The thin-film pressure sensor 400 includes a pressure measuring part 401, a connecting part 402, and a signal transmission part 403 connected in sequence. The pressure measuring part 401 is mounted on the upper surface of the support plate 101, and the pressure sensing module 300 is mounted on the upper surface of the pressure measuring part 401. The connecting part 402 passes through the first hole 102 into the second space, and the signal transmission part 403 extends out of the double-layer housing 100 through the through hole 103 opened on one side of the second space, so that the external pressure display can be connected to the signal transmission part and display the pressure value of the medical hose wall measured by the pressure measuring part.

[0042] Specifically, such as Figures 1 to 6 As shown, the medical pressure sensing device 1000 in this embodiment may include a double-layered housing 100, a top cover 200, a pressure-sensing module 300, and a thin-film pressure sensor 400. The double-layered housing 100 has a hollow interior with a receiving space. This receiving space is divided into upper and lower spaces by a support plate 101, namely a first space and a second space. The first space is located above the second space. In this embodiment, the first space may house the pressure-sensing module 300 and the thin-film pressure sensor 400. Figure 6 As shown, the thin-film pressure sensor 400 used in this embodiment includes three parts connected in sequence: a pressure measuring part 401, a connecting part 402, and a signal transmission part 403. The pressure measuring part 401 of the thin-film pressure sensor 400 can be fixedly mounted on the upper surface of the support plate 101. The pressure measuring part 401 can sense the pressure value applied to its surface and output it. The connecting part 402 is a flexible, bendable thin film with connecting wires inside for transmitting electrical signals. One end of the connecting part 402 is electrically connected to the pressure measuring part 401, and the other end is electrically connected to the signal transmission part 403. The pressure sensing module 300 can be mounted above the pressure measuring part 401, and the bottom of the pressure sensing module 300 is in contact with the upper surface of the pressure measuring part 401. Figure 4As shown, the support plate 101 in this embodiment has a long, narrow first hole 102. The connecting part 402 of the thin-film pressure sensor 400 can pass through the first hole 102 into the lower second space. Simply put, the second space inside the double-layer housing 100 can accommodate the connecting part 402 and the signal transmission part 403 of the thin-film pressure sensor 400. A through hole 103 communicating with the outside can be provided on one side of the second space. The signal transmission part 403 connected to the other end of the connecting part 402 can be connected to an external pressure display through this through hole 103, thereby allowing the external pressure display to show the pressure value received by the pressure measuring part 401, i.e., the wall pressure value of the tested medical tubing.

[0043] In another embodiment of this application, the top cover 200 is provided with a placement groove 201 adapted to the shape of the medical tubing.

[0044] Specifically, the medical pressure sensing device 1000 of this application embodiment aims to measure the change in pressure value of the medical hose wall without contacting the medication inside the medical hose, by employing a method such as... Figure 1 The medical tubing shown is placed horizontally inside the medical pressure sensing device 1000 of this application, and then the top cover 200 is closed, so that the top cover 200 and the double-layer housing 100 are in a compressed and closed state. Figure 2 As shown, the upper cover 200 may have a placement groove 201 adapted to the shape of the outer wall of the medical tubing. Furthermore, the upper cover 200 is hollowed out to accommodate the pressure sensing module 300 and adapt to its shape when the upper cover 200 is in place, ensuring a tight seal between the upper cover 200 and the double-layered housing 100, allowing only the tubing to pass through. When the upper cover 200 and the double-layered housing 100 are closed, the placement groove 201 on the upper cover 200 fits tightly against the tubing wall, rather than flattening it. This not only makes the measured pressure value of the medical tubing wall more accurate but also does not affect the normal flow and transmission of the medication within the medical tubing. The dashed lines in the attached diagram are outlines.

[0045] In another embodiment of this application, one end of the top cover 200 is movably connected to the double-layer shell 100, and the other end of the top cover 200 is provided with a connecting buckle 202. The double-layer shell 100 is provided with a protrusion 104. When the top cover 200 is in the closed state, the connecting buckle 202 and the protrusion 104 are fastened and fixed.

[0046] Specifically, such as Figure 2As shown, one end of the top cover 200 can be movably connected to one end of the top surface of the double-layer shell 100. A protrusion 109 can be provided at one end of the top surface of the double-layer shell 100. The protrusion 109 can have a transverse through hole. Corresponding side holes can be provided at the position where the top cover 200 mates with the protrusion 109. Specifically, a retractable elastic metal needle can be inserted through the transverse through hole of the protrusion 109, and then both ends of the retractable elastic metal needle can be inserted into the side holes of the top cover 200, thereby achieving a movable connection between the top cover 200 and the double-layer shell 100, meaning the top cover 200 can be opened or closed. A connecting buckle 202 is provided at the other end of the top cover 200, and a protrusion 104 is provided at a corresponding position on the double-layer shell 100. The position and shape of the protrusion 104 match those of the connecting buckle 202. When the connecting buckle 202 of the top cover 200 is fastened and fixed to the protrusion 104 on the double-layer shell 100, the top cover 200 and the double-layer shell 100 are in a pressed and closed state.

[0047] In another embodiment of this application, the pressure-sensing module 300 includes a first pressure-sensing element 301 and a second pressure-sensing element 303 embedded in the first pressure-sensing element 301.

[0048] Specifically, such as Figure 2 , Figure 7 and Figure 8 As shown, the pressure-sensing module 300 located in the first space includes a first pressure-sensing element 301 and a second pressure-sensing element 303. The second pressure-sensing element 303 can be embedded in the first pressure-sensing element 301. Simply put, as... Figure 7 As shown, a mounting block 306 is provided at each of the two ends of the side of the second pressure-sensing component 303. Figure 8 As shown, the bottom of the first pressure-sensing component 301 has a corresponding recessed space 305 for accommodating the mounting blocks 306 at both ends of the side of the second pressure-sensing component 303, thereby allowing the second pressure-sensing component 303 to be nested within the first pressure-sensing component 301. The main body of the first pressure-sensing component 301 is annular, while the main body of the second pressure-sensing component 303 is cylindrical. Therefore, the main body of the second pressure-sensing component 303 can extend vertically upward from the center of the annulus inside the first pressure-sensing component 301. However, due to the vertical restriction imposed by the recessed space 305 at the bottom of the first pressure-sensing component 301 on the mounting blocks 306 at both ends of the side of the second pressure-sensing component 303, the second pressure-sensing component 303 cannot fully extend upward in the vertical direction to detach from the first pressure-sensing component 301. After installation, the second pressure sensing element 303 and the first pressure sensing element 301 are not in a fixed relative position. This is because when the medical tubing is placed in the placement slot 201 of the second pressure sensing element 303 and the top cover 200 is closed, the downward pressure generated by the flow of the medicine in the medical tubing causes the second pressure sensing element 303 to move slightly downward in the vertical direction relative to the first pressure sensing element 301 and squeeze the pressure measuring part 401 of the thin-film pressure sensor 400 located below it.

[0049] In some other embodiments of this application, the double-layer shell 100 is provided with a fixing part 105 in the first space, and the first pressure sensing member 301 is provided with mounting parts 302 at both ends, and the mounting parts 302 are connected to the fixing part 105.

[0050] Specifically, such as Figure 4 As shown, a fixing part 105 is provided in the first space of the double-layer shell 100. Specifically, the fixing part 105 can be a slot on both sides of the double-layer shell 100. Correspondingly, mounting parts 302 are provided at corresponding positions at both ends of the first pressure sensing member 301 for docking with the fixing part 105. The mounting parts 302 at both ends of the first pressure sensing member 301 can fit into the fixing parts 105 at both ends of the double-layer shell 100. After installation, the first pressure sensing member 301 and the double-layer shell 100 are in a fixed relative position.

[0051] In another embodiment of this application, a boss 106 is provided on the support plate 101, and the boss 106 supports the first pressure-sensing member 301.

[0052] Specifically, such as Figure 4 As shown, the upper surface of the support plate 101 is provided with an annular boss 106 along its edge. The first hole 102 can be provided between the first and second ends of the annular boss 106. When the pressure-sensing module 300 is installed in the first space, the bottom surface of the first pressure-sensing component 301 contacts the top surface of the annular boss 106, that is, the boss 106 plays the role of supporting the first pressure-sensing component 301.

[0053] In another embodiment of this application, the upper surfaces of the first pressure-sensing member 301 and the second pressure-sensing member 303 are provided with placement grooves 201 adapted to the shape of the medical tubing, and the upper surface of the second pressure-sensing member 303 is higher than the upper surface of the first pressure-sensing member 301.

[0054] Furthermore, such as Figure 2 As shown, in this embodiment, the pressure-sensing module 300 and the placement groove 201 of the upper cover 200 adopt the same structural design. Similarly, the upper surfaces of the first pressure-sensing component 301 and the second pressure-sensing component 303 are provided with placement grooves 201 that are adapted to the shape of the outer wall of the medical hose, thereby adapting to the shape of the medical hose wall. The placement grooves 201 on the upper surfaces of the first pressure-sensing component 301 and the second pressure-sensing component 303 allow the pressure-sensing module 300 to fit tightly against the wall of the medical hose when the upper cover 200 and the double-layer shell 100 are in a compressed and closed state, avoiding flattening the wall of the medical hose. This not only makes the subsequently measured pressure value of the medical hose wall more accurate, but also does not affect the normal flow and transmission of the medicine in the medical hose.

[0055] According to the above description of this application, the pressure-sensing module 300 is mounted on the upper surface of the pressure measuring unit 401. More specifically, in this embodiment, the pressure-sensing module 300 is a second pressure-sensing element 303 mounted on the upper surface of the pressure measuring unit 401, i.e., as shown... Figure 6 The bottom of the second pressure-sensing element 303 is in contact with the upper surface of the pressure measuring part 401. For example... Figure 3 As shown, in this embodiment, the upper surface of the second pressure-sensing element 303 in the installed pressure-sensing module 300 can be set to be higher than the upper surface of the first pressure-sensing element 301. Based on this, when the medical tubing to be tested is normally placed in the medical pressure sensing device 1000, that is, the wall of the medical tubing is tightly fitted with the upper cover 200 and the upper and lower placement grooves 201 of the second pressure-sensing element 303, when the pressure value of the medical tubing wall increases, since the upper wall of the medical tubing is pressed against by the upper cover 200, the lower wall of the medical tubing will press down on the placement groove 201 on the upper surface of the second pressure-sensing element 303, thereby further pressing down on the pressure measuring part 401 located below by the second pressure-sensing element 303, so that the pressure measuring part 401 can measure the pressure value of the medical tubing wall.

[0056] Since the upper surface of the second pressure-sensing element 303 in this embodiment is higher than the upper surface of the first pressure-sensing element 301, when the second pressure-sensing element 303 is pressed downward, the contact part between the medical hose and the medical pressure sensing device 1000 is always the part of the medical hose located in the placement groove 201 of the second pressure-sensing element 303, and will not make pressurized contact with the placement groove 201 of the first pressure-sensing element 301, thereby interfering with the pressure value of the medical hose wall measured by the pressure measuring unit 401. This makes the pressure value of the medical hose wall measured by the pressure measuring unit 401 more accurate.

[0057] The testing procedure for the pressure value of the medical tubing wall is as follows: First, place the empty tubing without liquid inside into the placement slot 201 of the second pressure sensor 303; second, cover the top cover 200, and fasten the connecting buckle 202 with the protrusion 104, so that the top cover 200 and the double-layer shell 100 are in a compressed and closed state; third, regardless of the pressure value output by the membrane pressure sensor 400 in real time, the tube wall pressure value displayed on the external pressure display is cleared to zero as the test reference pressure value; fourth, inject the medicine into the medical tubing. At this time, the upper and lower walls of the tubing will collide and squeeze the top cover 200 and the second pressure sensor 303. Since the top cover 200 is tightly pressed against the upper wall of the tubing, the lower wall of the tubing will squeeze the second pressure sensor 303, and then the second pressure sensor 303 will squeeze downward to transmit the vertical pressure to the pressure measuring part 401 of the membrane pressure sensor 400 located below. The signal transmission part 403 sends an electrical signal to the external pressure display in real time and displays the real-time tube wall pressure value, thereby realizing real-time monitoring of changes in tube wall pressure value. This is not the focus of this application, so I will not elaborate further.

[0058] In another embodiment of this application, a silicone disc 404 is provided on the upper surface of the pressure measuring part 401.

[0059] In simple terms, in this embodiment, the pressure measuring part 401 can be disc-shaped, and its diameter can be the same as the bottom diameter of the second pressure sensing element 303. Based on this, a silicone disc 404 can be fixedly disposed on the upper surface of the pressure measuring part 401. The silicone disc 404 can also be disc-shaped, and its surface diameter can be set to be no larger than the upper surface diameter of the pressure measuring part 401. Therefore, the bottom of the second pressure sensing element 303 does not directly contact the upper surface of the pressure measuring part 401, but directly contacts the silicone disc 404 fixedly disposed on the upper surface of the pressure measuring part 401, thereby indirectly transmitting the downward squeezing force to the pressure measuring part 401. The advantage of this is that the second pressure sensing element 303 directly contacts the silicone disc 404 instead of directly contacting the pressure measuring part 401, and the downward pressure transmitted from the silicone disc 404 is more even, thus making the pressure value of the medical tubing wall measured by the pressure measuring part 401 more accurate.

[0060] In some other embodiments of this application, the two ends of the double-layer shell 100 are respectively provided with a first extension 107 and a second extension 108. The first extension 107 and the second extension 108 are provided with a receiving space and communicate with the second space. A through hole 103 is provided on the side of one of the first extension 107 and the second extension 108.

[0061] Specifically, such as Figure 2 As shown, in this embodiment, the two ends of the double-layer shell 100 can be respectively provided with a first extension 107 and a second extension 108. The first extension 107 and the second extension 108 are hollow inside and have accommodating spaces. Figure 9 As shown, in this embodiment, the accommodating spaces inside the first extension 107 and the second extension 108 can be connected to the second space inside the double-layer shell 100. According to the above description in this application, a through hole 103 communicating with the outside can be provided on one side of the second space. Further, in this embodiment, as... Figure 3As shown, a through hole 103 can be provided on the side of either the first extension 107 or the second extension 108 to allow the signal transmission part 403 of the thin-film pressure sensor 400 to extend out of the medical pressure sensing device 1000. This has the advantage that, since the connecting part 402 of the thin-film pressure sensor 400 is typically quite long, the increased accommodating space provided by the first extension 107 and the second extension 108 reduces the number of bends in the connecting part 402 within the second space, thereby further ensuring the stability of the pressure signal transmission. Secondly, the first extension 107 and the second extension 108 also make the medical pressure sensing device 1000 of this embodiment wider and more stable in its lateral structure.

[0062] In another embodiment of this application, the medical pressure sensing device 1000 further includes a bottom cover plate 500. The bottom cover plate 500 has four mounting posts 501 on the side facing the support plate 101. The mounting posts 501 are provided with internal threads. The double-layer housing 100 has four through holes 103 at the corresponding positions of the mounting posts 501. The bottom cover plate 500 and the double-layer housing 100 are fixed together by screws screwed into the through holes 103.

[0063] Specifically, such as Figure 5 As shown, the medical pressure sensing device 1000 also includes a bottom cover plate 500. In this embodiment, the shape of the bottom cover plate 500 can match the outer contour of the edge of the first extension 107, the second extension 108, and the space after the second space is connected. Four mounting posts 501 are provided on the side of the bottom cover plate 500 facing the support plate 101. In this embodiment, the mounting posts 501 are hollow and may have internal threads. For example... Figure 4 As shown, each of the four corners of the top surface of the double-layer housing 100 can be provided with a through hole 103. The positions of these through holes 103 correspond to the positions of the four mounting posts 501 provided on the bottom cover plate 500. In this embodiment, screws can be inserted into the four through holes 103 and then screwed into the internal threads of the four mounting posts 501 to fix the bottom cover plate 500 to the double-layer housing 100, which also facilitates later maintenance and disassembly.

[0064] In summary, the medical pressure sensing device provided in this application includes a double-layered housing, a top cover, a pressure-sensing module, and a thin-film pressure sensor. The double-layered housing contains an accommodating space and a horizontally positioned support plate. A first hole is provided on the support plate, dividing the accommodating space into a first space and a second space. The first space is located above the second space and is used to accommodate the pressure-sensing module and the thin-film pressure sensor. The thin-film pressure sensor includes a pressure-measuring part, a connecting part, and a signal transmission part connected in sequence. The pressure-measuring part is mounted on the upper surface of the support plate, and the pressure-sensing module is mounted on the upper surface of the pressure-measuring part. The connecting part passes through the first hole into the second space, and the signal transmission part extends out of the double-layered housing through a through-hole on one side of the second space, allowing an external pressure display to connect to the signal transmission part and display the pressure value. Therefore, the thin-film pressure sensor used in the medical pressure sensing device of this application has a relatively low cost. It can measure the pressure value of the medical tubing wall without contacting the drug solution in the test tubing, which has good economy and convenience. Moreover, the medical pressure sensing device provided by this application is easy to disassemble for later maintenance and can be reused. In addition, it has the advantages of small size, accurate pressure measurement and stable transmission of pressure measurement electrical signal.

[0065] While specific embodiments of this application have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of this application. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of this application. The scope of this application is defined by the appended claims.

Claims

1. A medical pressure sensing device for testing a medical hose wall pressure value, characterized by The device includes a double-layered housing, a top cover, a pressure-sensing module, and a thin-film pressure sensor. The double-layered housing has an internal accommodating space and a horizontally placed support plate. The support plate has a first opening, dividing the accommodating space into a first space and a second space. The first space is located above the second space and is used to accommodate the pressure-sensing module and the thin-film pressure sensor. The thin-film pressure sensor includes a pressure-measuring part, a connecting part, and a signal transmission part connected in sequence. The pressure-measuring part is mounted on the upper surface of the support plate, and the pressure-sensing module is mounted on the upper surface of the pressure-measuring part. The connecting part passes through the first opening into the second space, and the signal transmission part extends out of the double-layered housing through a through hole on one side of the second space, so that an external pressure display can be connected to the signal transmission part to display the pressure value of the medical tubing wall measured by the pressure-measuring part.

2. The medical pressure sensing device of claim 1, wherein, The top cover is provided with a placement groove that is adapted to the shape of the medical tubing.

3. The medical pressure sensing device of claim 2, wherein, One end of the top cover is movably connected to the double-layer shell, and the other end of the top cover is provided with a connecting buckle. The double-layer shell is provided with a protrusion. When the top cover is in the closed state, the connecting buckle is engaged and fixed with the protrusion.

4. The medical pressure sensing device of claim 3, wherein, The pressure-sensing module includes a first pressure-sensing element and a second pressure-sensing element embedded in the first pressure-sensing element.

5. The medical pressure sensing device according to claim 4, characterized in that, The double-layer shell has a fixing part in the first space, and the first pressure sensing element has mounting parts at both ends, with the mounting parts docking with the fixing part.

6. The medical pressure sensing device according to claim 5, characterized in that, The support plate is provided with a boss, which supports the first pressure-sensing element.

7. The medical pressure sensing device according to claim 6, characterized in that, The upper surfaces of the first pressure-sensing element and the second pressure-sensing element are provided with placement grooves adapted to the shape of the medical tubing, and the upper surface of the second pressure-sensing element is higher than the upper surface of the first pressure-sensing element.

8. The medical pressure sensing device according to claim 7, characterized in that, The upper surface of the pressure measuring part is provided with a silicone disc.

9. The medical pressure sensing device according to claim 8, characterized in that, The double-layer shell has a first extension and a second extension at each end. The first extension and the second extension have a receiving space and communicate with the second space. The through hole is provided on the side of one of the first extension and the second extension.

10. The medical pressure sensing device according to claim 9, characterized in that, The medical pressure sensing device also includes a bottom cover plate, on the side of the bottom cover plate facing the support plate, there are four mounting columns, the mounting columns are provided with internal threads, and the double-layer shell is provided with four through holes at the corresponding positions of the mounting columns. The bottom cover plate and the double-layer shell are fixed together by screws screwed into the through holes.

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