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 is provided with a first clamping structure, the pressure bag comprises a base body, a sliding locking piece and a pressure conduction piece, the sliding locking piece is provided with a second clamping structure, and the pressure conduction piece is arranged at the bottom end of the base body and used for making contact with the pressure sensor so as to conduct the pressure of fluid in the pressure bag; after the pressure conduction piece makes contact with the pressure sensor, the first clamping structure and the second clamping structure can be clamped in a matched mode by rotating the sliding locking piece so as to lock the pressure bag and the pressure sensor. The first clamping structure and the second clamping structure can be clamped only by rotating the sliding locking piece, connection of the pressure sensor and the pressure bag is achieved, the structure is simple, and clamping is firm and smooth; and the appearance is simple 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. For example, in the treatment of acute and chronic renal failure, the purification device is usually a dialyzer composed of 8,000 to 15,000 hollow fibers. Blood and dialysate exchange substances inside and outside the hollow fibers through physical effects such as diffusion, convection, ultrafiltration, and adsorption, removing metabolic waste from the blood to maintain electrolyte and acid-base balance, while removing excess water from the body, and finally returning the purified blood.

[0003] During the whole process of blood purification treatment, it is necessary to detect the power and pressure of the liquids in various pipelines such as blood, dialysate and replacement fluid. In the prior art, the pressure sensor and the pressure capsule are closely matched to effectively measure the pressure; the combination of the pressure sensor and the pressure capsule needs to be additionally provided with a fixed pressure head to be pressed or connected 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 be 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, wherein the pressure sensor is provided with a first clamping structure;

[0009] A pressure bag, the pressure bag comprises a base, a sliding locking piece and a pressure transmission piece, the sliding locking piece is rotatably sleeved outside the base, and a second clamping structure is provided on the sliding locking piece; the pressure transmission piece is arranged at the bottom end of the base, and is used to contact the pressure sensor to transmit the pressure of the fluid in the pressure bag; after the pressure transmission piece contacts the pressure sensor, the first clamping structure and the second clamping structure can be matched and clamped by rotating the sliding locking piece to lock the pressure bag and the pressure sensor.

[0010] As an optional technical solution of a pressure monitor, the first clamping structure is a clamping groove arranged on the side wall of the pressure sensor, and the second clamping structure is a protrusion arranged on the inner side of the sliding locking member;

[0011] And / or, the first clamping structure is a protrusion arranged on the side wall of the pressure sensor, and the second clamping structure is a clamping groove arranged on the inner side of the sliding locking member.

[0012] As an optional technical solution for a pressure monitor, the card slot includes:

[0013] An access section, the access section extending along the axial direction of the pressure sensor and forming an access port at the top end of the pressure sensor;

[0014] The screw-on section is connected with the access section, the screw-on section extends along the circumference of the pressure sensor, the protrusion can enter the access section through the access port, and the protrusion can slide into the screw-on section by rotating the sliding locking member.

[0015] As an optional technical solution of a pressure monitor, at least two first clamping structures are arranged at intervals around the circumference of the pressure sensor, and the second clamping structures are arranged in a one-to-one correspondence with the first clamping structures.

[0016] As an optional technical solution for a pressure monitor, the snap-in slot is L-shaped.

[0017] As an optional technical solution for a pressure monitor, a measuring cavity for the fluid to pass through is provided in the base body; the pressure transmission element is a diaphragm, which is connected to the base body and closes the measuring cavity.

[0018] As an optional technical solution of a pressure monitor, the pressure sensor is further provided with a diaphragm, and the diaphragm is arranged on the top surface of the pressure sensor;

[0019] The diaphragm is located at the bottom end of the base, and the diaphragm can be closely fitted with the diaphragm to transmit pressure to the diaphragm.

[0020] As an optional technical solution for a pressure monitor, a positioning groove is provided at the bottom end of the base, and a connecting portion is protruding from the edge of the diaphragm. The connecting portion is tightly pressed into the positioning groove to fix the diaphragm to the base.

[0021] As an optional technical solution of a pressure monitor, the substrate is further provided with a flow channel, and the flow channel includes:

[0022] A liquid inlet channel, connected to the measuring cavity to allow the fluid to enter;

[0023] A liquid outlet channel is connected to the measuring cavity to allow the fluid to flow out.

[0024] 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.

[0025] Beneficial effects:

[0026] The utility model provides a pressure monitor, which includes a pressure sensor and a pressure capsule. The pressure sensor is provided with a first clamping structure. The pressure capsule includes a base, a sliding locking piece and a pressure transmission piece. The sliding locking piece is rotatably sleeved outside the base. The sliding locking piece is provided with a second clamping structure. The pressure transmission piece is arranged at the bottom end of the base and is used to contact the pressure sensor to transmit the pressure of the fluid in the pressure capsule. After the pressure transmission piece contacts the pressure sensor, the first clamping structure and the second clamping structure can be matched and clamped by rotating the sliding locking piece to lock the pressure capsule and the pressure sensor. By providing a pressure capsule with a sliding locking piece, the first clamping structure and the second clamping structure can be matched and clamped by rotating the sliding locking piece. The structure is simple and the clamping is firm. The connection between the pressure sensor and the pressure capsule can be achieved by rotating the sliding locking piece. The operation is simple and the clamping is smooth. There is no need to set an additional fixed pressure head. The appearance is simple and smooth, which is convenient for cleaning and disinfection.

[0027] The utility model provides a blood purification device, which includes a device body and the above-mentioned pressure monitor. The pressure monitor is arranged on the device body. By arranging a snap-fitting pressure bag and a pressure sensor, the stability of the connection is improved, the appearance is smooth, and the formation of blind spots for cleaning and disinfection is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of a pressure monitor provided by an embodiment of the utility model;

[0029] Figure 2 It is a schematic diagram of the structure of the pressure sensor provided by the embodiment of the utility model;

[0030] Figure 3 It is a schematic diagram of the structure of the pressure bag provided by the embodiment of the utility model;

[0031] Figure 4 is an exploded diagram of a pressure monitor provided by an embodiment of the utility model;

[0032] Figure 5 It is a cross-sectional view of a pressure monitor provided by an embodiment of the utility model.

[0033] In the figure:

[0034] 10. Pressure sensor; 11. Card slot; 12. Diaphragm;

[0035] 20. Pressure bladder;

[0036] 21. substrate; 211. flow channel; 212. measuring cavity;

[0037] 22. Sliding locking member; 221. Protrusion;

[0038] 23. Diaphragm. DETAILED DESCRIPTION

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] The pressure detector includes a pressure sensor 10 and a pressure capsule 20. The pressure sensor 10 is provided with a first clamping structure, which is used to cooperate with the pressure capsule 20. The pressure sensor 10 and the pressure capsule 20 are combined to detect the pressure of the fluid passing through the pressure capsule 20. In this embodiment, the fluid is blood; the first clamping structure is a clamping groove 11. In other embodiments, the fluid may also be other liquids.

[0045] Specifically, the pressure bag 20 is arranged above the pressure sensor 10; the pressure sensor 10 includes a base and a main body, the main body is integrated with the base and the main body is arranged on the base, and a snap-in groove 11 is provided on the side wall of the main body, and the snap-in groove 11 is arranged near the top of the main body.

[0046] Furthermore, the snap-in groove 11 includes an access section and a screw-on section. The access section extends along the axial direction of the pressure sensor 10, and the access section extends to the top of the main body and forms an access port. The screw-on section is connected to the access section, and the screw-on section extends along the circumferential direction of the main body. By providing the snap-in groove 11, an access port is formed on the main body of the pressure sensor 10, which facilitates the docking and engagement of the pressure capsule 20. Preferably, the snap-in groove 11 is L-shaped. In other embodiments, the snap-in groove 11 may also be T-shaped.

[0047] The pressure sensor 10 is also provided with a diaphragm 12, which is arranged on the top surface of the main body. When the pressure sensor 10 and the pressure capsule 20 are assembled, after the pressure sensor 10 and the pressure capsule 20 are engaged, the diaphragm 12 is arranged on the top surface, so as to fit closely with the pressure capsule 20. The pressure capsule 20 can sense pressure and transmit the sensed pressure to the diaphragm 12; the diaphragm 12 is a silicon diaphragm, and the diaphragm 12 is the main position for the pressure sensor 10 to sense pressure.

[0048] like Figures 3 to 5As shown, the pressure capsule 20 includes a base 21, a sliding locking member 22 and a pressure transmission member. The sliding locking member 22 is rotatably sleeved on the outside of the base 21. A second clamping structure is provided on the sliding locking member 22. The pressure transmission member is arranged at the bottom end of the base 21 and is used to contact the pressure sensor 10 to transmit the pressure of the fluid in the pressure capsule 20. After the pressure transmission member contacts the pressure sensor 10, the first clamping structure and the second clamping structure can be engaged by rotating the sliding locking member 22 to lock the pressure capsule 20 and the pressure sensor 10.

[0049] In this embodiment, the second clamping structure is a protrusion 221, which is arranged on the inner side of the sliding locking member 22; the protrusion 221 can enter the access section through the access port of the clamping groove 11, and the sliding locking member 22 is rotated to make the protrusion 221 slide into the screwing section to achieve clamping. In other embodiments, the protrusion 221 can also be arranged on the side wall of the pressure sensor 10, and the clamping groove 11 can be arranged on the inner side of the sliding locking member 22 of the pressure capsule 20, that is, the first clamping structure is a protrusion, and the second clamping structure is a clamping groove.

[0050] Preferably, at least two first clamping structures are arranged at intervals around the circumference of the pressure sensor 10, and the second clamping structures are arranged one-to-one corresponding to the first clamping structures. By arranging at least two clamping structures around the pressure sensor 10 for coordinated clamping, 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.

[0051] A measuring cavity 212 for fluid to pass through is provided in the base 21, and 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 to 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 to 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.

[0052] Preferably, the measuring cavity 212 is an arc-shaped cavity. The middle space of the arc-shaped cavity is smaller than the surrounding space, which promotes the flow of fluid and avoids the phenomenon of blood coagulation. By setting the 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 of the middle space of the arc-shaped cavity is narrow, and the flow range of the surrounding space 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; 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 is 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 will not cause blood retention and will not form a dead cavity.

[0053] The pressure transmission part is a diaphragm 23, which is connected to the base 21. The diaphragm 23 closes the measuring cavity 212 to isolate the fluid from the air. The diaphragm 23 can sense the pressure and separate the fluid from the air, effectively avoiding cross infection and improving the accuracy and precision of monitoring. In this embodiment, the diaphragm 23 is made of silicone material; the diaphragm 23 is located at the bottom of the base 21, and the diaphragm 23 is used to fit tightly with the diaphragm 12 of the pressure sensor 10 to transmit the pressure to the diaphragm 12.

[0054] In order to fix the diaphragm 23 on the base 21, a positioning groove is provided on the base 21, and a connecting portion is convexly provided on the edge of the diaphragm 23, and the connecting portion is tightly pressed into the positioning groove to fix the diaphragm 23 to the base 21. By providing the connecting portion and the positioning groove, the connecting portion is tightly pressed into the positioning groove, so that the diaphragm 23 is stably fixed on the base 21, and the diaphragm 23 is prevented from being separated from the base 21 under the action of fluid pressure. In this embodiment, the diaphragm 23 is circular; the connecting portion is a circular protrusion, which is conducive to ensuring that the edge of the diaphragm 23 is evenly pressed on the base 21.

[0055] The following is the specific installation and use process of the pressure monitor:

[0056] The sliding locking member 22 is disposed on the base 21 and connected to the base 21 as a whole; the diaphragm 23 is tightly pressed and installed in the positioning groove of the base 21 to obtain the pressure bag 20.

[0057] The pressure capsule 20 is placed above the pressure sensor 10 so that the protrusion 221 is aligned with the access port of the snap-in groove 11 (once the position is not aligned, the protrusion 221 is difficult to insert into the snap-in groove 11, which can effectively prevent mistakes), so that the pressure sensor 10 can partially extend to the middle of the sliding locking member 22, and the protrusion 221 enters the access section of the snap-in groove 11 from the access port; then the sliding locking member 22 is rotated, and the protrusion 221 slides into the screw-in section of the snap-in groove 11 to achieve the snap-in connection. The sliding locking member 22 is rotated to a certain angle. If the protrusion 221 slides to the end of the screw-in section, the sliding locking member 22 cannot be rotated further at this time, and the sliding locking member 22 is screwed into place. It can be understood that the combination of the pressure sensor 10 and the pressure capsule 20 can be achieved by snapping the protrusion 221 of the sliding locking member 22 into the screw-in section of the snap-in groove 11, and the specific angle of rotation of the sliding locking member 22 can be adjusted according to actual operation.

[0058] 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 23 of the pressure bag 20, and the diaphragm 23 transmits the induced pressure to the diaphragm 12 of the pressure sensor 10. The diaphragm 12 generates strain, causing the strain resistor directly diffused thereon 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.

[0059] By setting a pressure bag 20 with a sliding locking piece 22, the sliding locking piece 22 is rotated to make the first clamping structure and the second clamping structure cooperate and clamp together. The structure is simple and the clamping is firm. The connection between the pressure sensor 10 and the pressure bag 20 can be achieved by only rotating the sliding locking piece 22, which improves the stability of the connection, and the operation is simple and the clamping is smooth. There is no need to set up an additional fixed pressure head, the appearance is simple and smooth, it is easy to clean and disinfect, and the formation of dead corners for cleaning and disinfection is avoided, which is convenient for clinical operation and use.

[0060] 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, wherein the pressure sensor is provided with a first clamping structure; A pressure bag, the pressure bag comprises a base, a sliding locking piece and a pressure transmission piece, the sliding locking piece is rotatably sleeved outside the base, and a second clamping structure is provided on the sliding locking piece; the pressure transmission piece is arranged at the bottom end of the base, and is used to contact the pressure sensor to transmit the pressure of the fluid in the pressure bag; after the pressure transmission piece contacts the pressure sensor, the first clamping structure and the second clamping structure can be matched and clamped by rotating the sliding locking piece to lock the pressure bag and the pressure sensor.

2. The pressure monitor according to claim 1, characterized in that: The first clamping structure is a clamping groove provided on the side wall of the pressure sensor, and the second clamping structure is a protrusion provided on the inner side of the sliding locking member; And / or, the first clamping structure is a protrusion arranged on the side wall of the pressure sensor, and the second clamping structure is a clamping groove arranged on the inner side of the sliding locking member.

3. The pressure monitor according to claim 2, characterized in that: The card slot comprises: An access section, the access section extending along the axial direction of the pressure sensor and forming an access port at the top end of the pressure sensor; The screw-on section is connected with the access section, the screw-on section extends along the circumference of the pressure sensor, the protrusion can enter the access section through the access port, and the protrusion can slide into the screw-on section by rotating the sliding locking member.

4. The pressure monitor according to claim 2, characterized in that: At least two first clamping structures are arranged at intervals around the circumference of the pressure sensor, and the second clamping structures are arranged in a one-to-one correspondence with the first clamping structures.

5. The pressure monitor according to claim 2, characterized in that: The clamping groove is L-shaped.

6. The pressure monitor according to claim 1, characterized in that: A measuring cavity for the fluid to pass through is disposed in the base body; the pressure transmission element is a diaphragm, which is connected to the base body and closes the measuring cavity.

7. The pressure monitor according to claim 6, characterized in that: The pressure sensor is also provided with a diaphragm, and the diaphragm is arranged on the top surface of the pressure sensor; The diaphragm is located at the bottom end of the base, and the diaphragm can be closely fitted with the diaphragm to transmit pressure to the diaphragm.

8. The pressure monitor according to claim 6, characterized in that: A positioning groove is provided at the bottom end of the base, and a connecting portion is protruding from the edge of the diaphragm. The connecting portion is tightly pressed into the positioning groove to fix the diaphragm to the base.

9. The pressure monitor according to claim 6, characterized in that: The substrate is also provided with a flow channel, and the flow channel comprises: A liquid inlet channel, connected to the measuring cavity to allow the fluid to enter; A liquid outlet channel is connected to the measuring cavity to allow the fluid to flow out.

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.

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