Pressure monitor and blood purification equipment

Abstract

The utility model belongs to the technical field of medical instruments, and discloses a pressure monitor and blood purification equipment. The blood purification equipment comprises an equipment body and a pressure monitor, wherein the pressure monitor is arranged on the equipment body. The pressure monitor comprises a pressure sensor and a pressure bag, the pressure sensor comprises a main body, the top of the main body is provided with a boss, the boss is provided with a pressure sensing piece, and the peripheral side of the main body is further provided with a first connecting part; the boss is sleeved with the pressure bag, a pressure conduction piece is arranged at the bottom of the pressure bag, a second connecting part is arranged on the peripheral side of the pressure bag, the pressure sensor and the pressure bag rotate relatively so that the first connecting part and the second connecting part can be wedged tightly, and the pressure induction piece abuts against the pressure conduction piece. By arranging the first connecting part and the second connecting part, wedge-caulking is realized through rotation, so that the pressure sensor and the pressure bag can be tightly matched and firmly and smoothly connected, a fixed pressure head does not need to be additionally arranged, the appearance is concise and smooth, and cleaning and disinfection are convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a pressure monitor and blood purification equipment. Background Art

[0002] Blood purification therapy refers to drawing blood out of the body and removing harmful substances from the blood through a purification device, thereby achieving the purpose of treating the disease. During the entire process of blood purification therapy, a pressure monitor needs to be set up to detect the power and pressure of the liquids in each pipeline, such as blood, dialysate, and replacement fluid. Once the blood circuit conditions change, such as blocked blood flow, coagulation of the purification device, folding of the blood circuit tube, and detachment of the connector, the pressure monitor can monitor the pressure, issue an alarm in time, and take measures to ensure the safety of blood purification therapy.

[0003] There are two types of pressure monitors. One is the drip pressure pot. Due to its large size, it increases the amount of extracorporeal blood circulation. With air as the medium, there is a risk of air pollutants entering the pipeline, blood leakage, and coagulation. The other is the membrane pressure pot, which transmits the pressure directly to the surface of the pressure sensor through the membrane of the pressure bag to test the pressure. In the existing model pressure pot, the pressure bag and the pressure sensor combination need to be additionally set with a fixed pressure head to press or connect by edge clamping. The additional fixed pressure head makes the appearance structure complicated and difficult to clean and disinfect. The edge clamping is easy to get stuck or stuck and cannot be smoothly put into place.

[0004] That is, the existing pressure sensor and pressure bag have the disadvantages of complex structure, unsophisticated appearance, dead corners for cleaning and disinfection, loose connection and difficulty in smooth engagement. Utility Model Content

[0005] The utility model aims to provide a pressure monitor and a blood purification device to solve the problems of the existing pressure sensor and pressure bag cooperation, such as complex structure, unsophisticated appearance, dead angles in cleaning and disinfection, loose connection and difficulty in smooth engagement.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] The utility model provides a pressure monitor, which comprises:

[0008] A pressure sensor, the pressure sensor comprising a main body, a boss is provided on the top of the main body, a pressure sensing element is provided on the boss, and a first connecting portion is also provided on the peripheral side of the main body;

[0009] A pressure bag, wherein the pressure bag is sleeved outside the boss, a pressure transmission component is provided at the bottom of the pressure bag, and a second connection portion is provided on the peripheral side of the pressure bag. The relative rotation of the pressure sensor and the pressure bag can wedge the first connection portion and the second connection portion, and the pressure sensing component and the pressure transmission component are tightly pressed against each other.

[0010] As an optional technical solution of the pressure monitor, the first connecting part is a hook, the hook and the main body together form a guide groove, and the guide groove has a limiting plane or a limiting inclined surface;

[0011] The second connecting portion is a clamping block, and the clamping block has a limiting inclined surface or a limiting plane. The clamping block can be rotated into the guiding groove to wedge the limiting plane and the limiting inclined surface.

[0012] As an optional technical solution of a pressure monitor, at least two first connecting parts are arranged at intervals around the circumference of the pressure sensor, and the second connecting parts are arranged in a one-to-one correspondence with the first connecting parts.

[0013] As an optional technical solution of a pressure monitor, the pressure bag includes:

[0014] A substrate, wherein a measuring cavity is provided in the substrate for fluid flow;

[0015] The diaphragm structure, as the pressure transmission component, is used to transmit the pressure of the fluid. The diaphragm structure is connected to the base body and closes the measuring cavity.

[0016] As an optional technical solution for a pressure monitor, the base is provided with an insertion hole, and the diaphragm structure includes:

[0017] A diaphragm, used to abut against the pressure sensing element;

[0018] A fixing column is connected to the diaphragm, the fixing column is inserted into the insertion hole, and the maximum inner diameter of the insertion hole is smaller than the maximum outer diameter of the fixing column.

[0019] As an optional technical solution of a pressure monitor, the pressure sensing element is a diaphragm, and the diaphragm is tightly fitted with the diaphragm to transmit the pressure to the diaphragm.

[0020] As an optional technical solution of the pressure monitor, the fixing column has a tapered fastening section in the middle, and the outer diameter of the fastening section gradually decreases in a direction away from the diaphragm.

[0021] As an optional technical solution for a pressure monitor, the diaphragm is circular, the fixing post is perpendicular to the plane where the diaphragm is located, and a plurality of the fixing posts are evenly spaced around the diaphragm.

[0022] As an optional technical solution for a pressure monitor, the measuring cavity is an arc-shaped cavity, and the middle space of the arc-shaped cavity is smaller than the surrounding space.

[0023] The utility model provides a blood purification device, which comprises a device body and a pressure monitor, wherein the pressure monitor is arranged on the device body.

[0024] Beneficial effects:

[0025] The utility model provides a pressure monitor, which includes a pressure sensor and a pressure capsule. The pressure sensor includes a main body, a boss is provided on the top of the main body, a pressure sensing component is provided on the boss, and a first connecting part is provided on the peripheral side of the main body; the pressure capsule is sleeved outside the boss, a pressure transmitting component is provided on the bottom of the pressure capsule, and a second connecting part is provided on the peripheral side of the pressure capsule. The relative rotation of the pressure sensor and the pressure capsule can wedge the first connecting part and the second connecting part, and the pressure sensing component and the pressure transmitting component are tightly pressed against each other. By setting the first connecting part and the second connecting part to achieve wedge tightening through rotation, the pressure sensor and the pressure capsule can be closely matched, the pressure sensing component and the pressure transmitting component are pressed against each other to monitor the fluid pressure, the connection is firm and smooth, no additional fixed pressure head is required, the appearance is simple and smooth, and it is easy to clean and disinfect.

[0026] The utility model provides a blood purification device, which comprises a device body and a pressure monitor. The pressure monitor is arranged on the device body. By arranging a wedged pressure bag and a pressure sensor, the stability of the connection is improved, the appearance is smooth, and the formation of dead corners for cleaning and disinfection is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is an exploded diagram of a pressure monitor provided by an embodiment of the utility model;

[0028] Figure 2 The structure diagram of the pressure monitor provided by the embodiment of the utility model is Figure 1 ;

[0029] Figure 3 The structure diagram of the pressure monitor provided by the embodiment of the utility model is Figure 2 ;

[0030] Figure 4 The pressure monitor provided by the utility model is a cross-sectional view Figure 1 ;

[0031] Figure 5 is an exploded view of a pressure bag provided by an embodiment of the utility model;

[0032] Figure 6 The pressure monitor provided by the utility model is a cross-sectional view Figure 2.

[0033] In the figure:

[0034] 10. pressure sensor; 11. first connecting portion; 12. diaphragm;

[0035] 20. Pressure bladder;

[0036] 21. substrate; 211. flow channel; 212. measuring cavity; 213. second connecting portion;

[0037] 22. Diaphragm structure; 221. Diaphragm; 222. Fixed column. DETAILED DESCRIPTION

[0038] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0039] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0041] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0042] like Figure 1 and Figure 2 As shown, the utility model provides a pressure monitor and a blood purification device. The blood purification device includes a device body and a pressure monitor. The pressure monitor is arranged on the device body.

[0043] The pressure monitor includes a pressure sensor 10 and a pressure capsule 20. The pressure sensor 10 includes a main body, a boss is provided on the top of the main body, a pressure sensing element is provided on the boss, and a first connecting portion 11 is provided on the peripheral side of the main body. The first connecting portion 11 is used to cooperate with the pressure capsule 20. The pressure sensor 10 cooperates with the pressure capsule 20 to detect the pressure of the fluid passing through the pressure capsule 20. In this embodiment, the fluid is blood; in other embodiments, the fluid may also be other liquids.

[0044] Specifically, the pressure bag 20 is arranged above the pressure sensor 10; the main body is in a truncated cone shape, and a circular boss is provided in the middle position of the top of the main body, and the diameter of the boss is smaller than the diameter of the main body; the first connecting part 11 is arranged at the outer contour edge of the main body.

[0045] In order to enable the first connection part 11 to cooperate with the pressure bag 20, the first connection part 11 is a hook, and the hook and the main body together form a guide groove, and the guide groove has a limiting plane or a limiting slope. In this embodiment, the first connection part 11 includes a connecting section and a guiding section. The connecting section extends along the axial direction of the main body, one end of the connecting end is connected to the main body and the other end is connected to the guiding section; the guiding section extends along the circumferential direction of the main body, and the position of the extension section is higher than the position of the main body. The connecting section and the guiding section form an L-shaped first connection part 11, and the first connection part 11 and the edge of the main body form a guide groove, and the guide groove has a limiting plane for cooperating with the pressure bag 20.

[0046] The pressure sensing part is a diaphragm 12, which is used to sense and conduct the pressure from the pressure capsule 20. When the pressure sensor 10 and the pressure capsule 20 are assembled, after the pressure sensor 10 and the pressure capsule 20 are matched, the diaphragm 12 is located on the top surface of the main body, so as to fit closely with the pressure capsule 20; the diaphragm 12 is a metal film diaphragm, and the diaphragm 12 is the main position of the pressure sensor 10 to sense pressure.

[0047] like Figures 2 to 6 As shown, the pressure bag 20 includes a base 21 and a pressure transmission component. A measuring cavity 212 is provided in the base 21 for fluid flow. The diaphragm structure 22 serves as a pressure transmission component for transmitting the fluid pressure in the pressure bag 20 . The diaphragm structure 22 is connected to the base 21 and closes the measuring cavity 212 .

[0048] Preferably, the measuring cavity 212 is an arc-shaped cavity, and the middle space of the arc-shaped cavity is smaller than the surrounding space. A flow channel 211 is also provided in the base 21, and the flow channel 211 includes a liquid inlet flow channel and a liquid outlet flow channel; one end of the liquid inlet flow channel is connected to the measuring cavity 212, and the other end of the liquid inlet flow channel is used to connect the liquid inlet pipeline; one end of the liquid outlet flow channel is connected to the measuring cavity 212, and the other end of the liquid outlet flow channel is used to connect the liquid outlet pipeline. In this embodiment, the measuring cavity 212 is located in the middle of the base 21, and the liquid inlet flow channel and the liquid outlet flow channel are respectively located on both sides of the measuring cavity 212.

[0049] By setting up an arc-shaped cavity, the fluid enters the arc-shaped cavity from the liquid inlet channel, so that the fluid is adjusted to a turbulent state and the flow is turbulent; the flow range in the middle space of the arc-shaped cavity is narrow, and the flow range around it is wide, so that the fluid will not be in a laminar state in the arc-shaped cavity, and the speed of the fluid changes continuously with the change of the cross-sectional area of ​​the space through which it flows; when the fluid flows out through the liquid outlet channel, the fluid will gather. Through simulation software analysis, when the simulation conditions are blood density of 1.060 kg / m3, viscosity of 3.5 times that of water, the internal roughness of the substrate 21 is 3.2 microns, the blood flow rate in the liquid inlet channel is 20 ml per second, and the blood pressure at the liquid outlet channel is 300 mmHg; the arc-shaped cavity structure will not cause blood retention and will not form a dead cavity.

[0050] In order to cooperate with the pressure sensor 10, the pressure capsule 20 is sleeved outside the boss of the pressure sensor 10, the second connection part 213 is provided on the peripheral side of the base 21, and the pressure transmission part is provided at the bottom of the base 21. The relative rotation of the pressure sensor 10 and the pressure capsule 20 can make the first connection part 11 and the second connection part 213 wedge tight, and the pressure sensing part and the pressure transmission part are tightly pressed. In this embodiment, the second connection part 213 is convexly provided on the outer wall of the base 21; the first connection part 11 is a hook, and the second connection part 213 is a block, and the block is a Luer thread structure. There is a large friction between the hook and the block, so that the two are tightly matched.

[0051] Preferably, at least two first connection parts 11 are arranged at intervals around the circumference of the pressure sensor 10, and the second connection parts 213 are arranged one-to-one with the first connection parts 11. By arranging at least two first connection parts 11 around the pressure sensor 10 for matching and snapping, the stability of the connection between the pressure sensor 10 and the pressure capsule 20 is ensured, and the pressure sensor 10 and the pressure capsule 20 are prevented from being separated during use.

[0052] In this embodiment, the second connecting portion 213 has a limiting inclined surface, and the second connecting portion 213 can be rotated into the guide groove, and the limiting inclined surface is used to cooperate and press against the limiting plane of the guide groove of the pressure sensor 10. In other embodiments, the guiding groove may also have a limiting inclined surface, and the second connecting portion 213 may have a limiting plane.

[0053] Furthermore, in order to fix the diaphragm structure 22 on the base 21, an insertion hole is provided on the base 21. The diaphragm structure 22 includes a diaphragm 221 and a fixing column 222. The diaphragm 221 is used to abut against the pressure sensing component. The fixing column 222 is connected to the diaphragm 221. The fixing column 222 is inserted into the insertion hole. The maximum inner diameter of the insertion hole is smaller than the maximum outer diameter of the fixing column 222. By setting the fixing column 222 to be inserted and matched with the base 21, the fixing column 222 and the insertion hole of the base 21 are interference-fitted, so that the diaphragm structure 22 is tightly fixed on the base 21 to prevent the diaphragm 221 from falling off; the diaphragm 221 closes the measuring cavity 212 to isolate the fluid and the air, effectively avoiding cross infection, and improving the accuracy and precision of monitoring.

[0054] In this embodiment, the insertion hole passes through the base 21, and the fixing column 222 passes through the insertion hole and the end is exposed on the base 21; the fixing column 222 has a tapered fastening section, and the outer diameter of the fastening section gradually decreases in the direction away from the diaphragm 221; the fastening section is in a tapered truncated cone shape. By providing the fixing column 222 with the fastening section, when the fixing column 222 is inserted into the insertion hole, when the fastening section is installed to the top position of the insertion hole, the outer surface of the fastening section is pressed against the inner wall of the insertion hole, and the diaphragm structure 22 is tightly combined with the base 21, which is safe and reliable.

[0055] In order to ensure that the edge of the diaphragm 221 can fit with the base 21 to close the measuring cavity 212, the diaphragm 221 is circular, the fixing column 222 is perpendicular to the plane where the diaphragm 221 is located, and multiple fixing columns 222 are evenly spaced around the diaphragm 221. In this embodiment, four fixing columns 222 are evenly spaced; the fixing columns 222 and the diaphragm 221 are integrally formed by injection molding and are both made of silicone; by evenly spaced around the circular diaphragm 221, the diaphragm 221 is subjected to uniform force, ensuring the stability of the edge of the diaphragm 221 fitting with the base 21.

[0056] The following is the specific installation and use process of the pressure monitor:

[0057] The diaphragm structure 22 is pressed onto the base body 21 so that the fixing columns 222 all pass through the insertion holes of the base body 21 , thereby obtaining the pressure bag 20 .

[0058] Place the pressure capsule 20 above the pressure sensor 10 so that the second connection part 213 is close to the first connection part 11; rotate the pressure capsule 20 so that the second connection part 213 moves along the first connection part 11, and the limiting inclined surface of the second connection part 213 is pressed against the limiting plane of the first connection part 11 (once the positions of the first connection part 11 and the second connection part 213 are not aligned, it will be difficult to achieve a wedge-tight fit, thereby effectively preventing mistakes).

[0059] The fluid enters from the liquid inlet channel, passes through the measuring cavity 212, and finally flows out from the liquid outlet channel; the pressure generated by the fluid passing through the measuring cavity 212 is transmitted to the diaphragm 221 of the pressure bag 20, and the diaphragm 221 transmits the induced pressure to the diaphragm 12 of the pressure sensor 10. The diaphragm 12 generates strain, causing the strain resistor directly diffused on it to produce a change proportional to the measured pressure, and then the corresponding voltage output signal is obtained by the bridge circuit to test the corresponding pressure.

[0060] By setting the first connecting part 11 and the second connecting part 213 to achieve wedging through rotation, the pressure sensor 10 and the pressure bag 20 can fit closely, and the connection is firm and smooth. There is no need to set up an additional fixed pressure head. The appearance is simple and smooth, and it is easy to clean and disinfect. There is no need to purchase from abroad, which reduces the investment cost.

[0061] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A pressure monitor, characterized in that: include: A pressure sensor, the pressure sensor comprising a main body, a boss is provided on the top of the main body, a pressure sensing element is provided on the boss, and a first connecting portion is also provided on the peripheral side of the main body; A pressure bag, wherein the pressure bag is sleeved outside the boss, a pressure transmission component is provided at the bottom of the pressure bag, and a second connection portion is provided on the peripheral side of the pressure bag. The relative rotation of the pressure sensor and the pressure bag can wedge the first connection portion and the second connection portion, and the pressure sensing component and the pressure transmission component are tightly pressed against each other.

2. The pressure monitor according to claim 1, characterized in that: The first connecting part is a hook, and the hook and the main body together form a guide groove, and the guide groove has a limiting plane or a limiting inclined surface; The second connecting portion is a clamping block, and the clamping block has a limiting inclined surface or a limiting plane. The clamping block can be rotated into the guiding groove to wedge the limiting plane and the limiting inclined surface.

3. The pressure monitor according to claim 1, characterized in that: At least two first connection parts are arranged at intervals around the circumference of the pressure sensor, and the second connection parts are arranged in a one-to-one correspondence with the first connection parts.

4. The pressure monitor according to claim 1, characterized in that: The pressure bag comprises: A substrate, wherein a measuring cavity is provided in the substrate for fluid flow; The diaphragm structure, as the pressure transmission component, is used to transmit the pressure of the fluid. The diaphragm structure is connected to the base body and closes the measuring cavity.

5. The pressure monitor according to claim 4, characterized in that: The base is provided with an insertion hole, and the diaphragm structure comprises: A diaphragm, used to abut against the pressure sensing element; A fixing column is connected to the diaphragm, the fixing column is inserted into the insertion hole, and the maximum inner diameter of the insertion hole is smaller than the maximum outer diameter of the fixing column.

6. The pressure monitor according to claim 5, characterized in that: The pressure sensing element is a diaphragm, and the diaphragm is closely fitted with the diaphragm to transmit the pressure to the diaphragm.

7. The pressure monitor according to claim 5, characterized in that: The fixing column has a tapered fastening section in the middle, and the outer diameter of the fastening section gradually decreases in a direction away from the diaphragm.

8. The pressure monitor according to claim 5, characterized in that: The diaphragm is circular, the fixing column is perpendicular to the plane where the diaphragm is located, and a plurality of the fixing columns are evenly spaced around the diaphragm.

9. The pressure monitor according to claim 4, characterized in that: The measuring cavity is an arc-shaped cavity, and the middle space of the arc-shaped cavity is smaller than the surrounding space.

10. A blood purification device, characterized in that: It comprises a device body and a pressure monitor as described in any one of claims 1 to 9, wherein the pressure monitor is arranged on the device body.

Images