CN116492112A - Valve simulation device and blood pump test system - Google Patents

Valve simulation device and blood pump test system Download PDF

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Publication number
CN116492112A
CN116492112A CN202310297675.6A CN202310297675A CN116492112A CN 116492112 A CN116492112 A CN 116492112A CN 202310297675 A CN202310297675 A CN 202310297675A CN 116492112 A CN116492112 A CN 116492112A
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CN
China
Prior art keywords
valve
cavity
liquid
simulation device
blood pump
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310297675.6A
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Chinese (zh)
Inventor
娄厦
吴迪
余顺周
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Shenzhen Core Medical Technology Co Ltd
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Shenzhen Core Medical Technology Co Ltd
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Application filed by Shenzhen Core Medical Technology Co Ltd filed Critical Shenzhen Core Medical Technology Co Ltd
Priority to CN202310297675.6A priority Critical patent/CN116492112A/en
Publication of CN116492112A publication Critical patent/CN116492112A/en
Pending legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/24—Heart valves ; Vascular valves, e.g. venous valves; Heart implants, e.g. passive devices for improving the function of the native valve or the heart muscle; Transmyocardial revascularisation [TMR] devices; Valves implantable in the body
    • A61F2/2472—Devices for testing
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
    • A61M60/10—Location thereof with respect to the patient's body
    • A61M60/122—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body
    • A61M60/165—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body implantable in, on, or around the heart
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
    • A61M60/80—Constructional details other than related to driving
    • A61M60/855—Constructional details other than related to driving of implantable pumps or pumping devices

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  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Cardiology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biomedical Technology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Mechanical Engineering (AREA)
  • Anesthesiology (AREA)
  • Hematology (AREA)
  • Transplantation (AREA)
  • Vascular Medicine (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • External Artificial Organs (AREA)

Abstract

The invention relates to a valve simulation device and a blood pump test system. The valve simulation device comprises a shell, a mounting frame and a valve. The shell is provided with a containing cavity, a liquid inlet and a liquid outlet; the mounting frame is arranged in the accommodating cavity to be mounted by the blood supply pump; the mounting frame or the shell is provided with a plugging part; the valve is arranged in the accommodating cavity so as to separate the liquid inlet from the liquid outlet; the valve is provided with a valve hole for communicating the liquid inlet and the liquid outlet, the valve is provided with a closed position for blocking the valve hole by the blocking part and an open position separated from the blocking part to open the valve hole, and the valve can move relative to the shell under the action of pressure difference between the liquid inlet and the liquid outlet and is switched between the closed position and the open position. The valve simulation device provided by the invention can truly simulate the opening and closing of the heart valve, and improves the accuracy of the service life test result of the blood pump.

Description

Valve simulation device and blood pump test system
Technical Field
The invention relates to the technical field of medical equipment, in particular to a valve simulation device and a blood pump test system comprising the same.
Background
A blood pump is a blood pumping device that can be advanced into a patient's heart through a patient's blood vessel, with the blood pump extending into the heart through a valve orifice of a heart valve to pump blood from the heart into an arterial blood vessel. Currently, in order to test the service life of a blood pump, the blood pump is usually placed in a valve simulator to simulate the opening and closing of a heart valve by means of the valve simulator, so as to test the blood pump. However, it is difficult for the conventional valve simulation device to accurately simulate the opening and closing of the heart valve, resulting in inaccurate test results of the service life of the blood pump.
Disclosure of Invention
The invention provides a valve simulation device, which aims to improve the authenticity of the valve simulation device for simulating the opening and closing of a heart valve and improve the accuracy of blood pump test so as to solve the problem of lower test accuracy of the traditional valve simulation device.
In one embodiment, the valve simulation device provided by the invention comprises a shell, a mounting rack and a valve; wherein the shell is provided with a containing cavity, a liquid inlet and a liquid outlet; the mounting frame is arranged in the accommodating cavity so as to mount the blood supply pump; the mounting frame or the shell is provided with a plugging part; the valve is arranged in the accommodating cavity so as to separate the liquid inlet from the liquid outlet; the valve is provided with a valve hole for communicating the liquid inlet and the liquid outlet, the valve is provided with a closed position for blocking the valve hole by the blocking part and an open position separated from the blocking part to open the valve hole, and the valve can move relative to the shell under the action of pressure difference between the liquid inlet and the liquid outlet and is switched between the closed position and the open position.
In one embodiment, the plugging part comprises a bottom plate arranged at the liquid inlet and a fixed table arranged on the bottom plate; wherein the fixing table is arranged protruding from the bottom plate towards the accommodating cavity so as to enable the valve annulus to seal the valve hole; the outer periphery of the bottom plate and the inner periphery of the liquid inlet are arranged at intervals, the bottom plate is provided with a stop surface encircling the periphery of the fixed table, and the stop surface faces the accommodating cavity so as to be attached to the valve.
In one embodiment, the mounting frame comprises a mounting seat and a guide part; wherein the mounting seat is fixedly connected with the shell; the guide part extends from the mounting seat towards the liquid inlet and penetrates through the valve hole of the valve to be connected with the blocking part, so that the valve can slide along the extending direction of the guide part.
In one embodiment, the accommodating cavity of the shell comprises a first cavity communicated with the liquid outlet and a second cavity which is positioned between the first cavity and the liquid inlet and communicated with the first cavity, and a supporting table is arranged between the second cavity and the first cavity; the mounting seat comprises a seat plate and a sleeve; the seat board is arranged on the supporting table and is provided with a communication hole which is opposite to the fixing hole and used for the blood pump to pass through; the sleeve is connected with the seat plate and surrounds the periphery of the guide part, and extends from the seat plate to the second cavity to be in contact fit with the inner peripheral wall of the second cavity.
In one embodiment, at least one of the mounting seat and the guide part is provided with a hole for communicating the first cavity with the second cavity; and/or the plugging part is penetrated with a fixing hole opposite to the valve hole, and the fixing hole can be used for the blood pump to pass through to be matched with the blood pump in an inserting way.
In one embodiment, the guide part includes a plurality of guide ribs, and the plurality of guide ribs are annularly arranged at intervals and extend from the mounting seat towards the liquid inlet; and the pore is formed between two adjacent guide ribs.
In one embodiment, the guide rib comprises a connecting section, a reducing section and a guide section; the connecting section is connected with the mounting seat and extends from the mounting seat towards the liquid inlet; the diameter-reducing section extends inwards along the radial direction from one end of the connecting section, which faces the liquid inlet; the guide section extends from the inner end of the diameter-reducing section towards the liquid inlet; the valve ring is sleeved on the guide section; the mount has a bottom end surface facing the valve, and a spacing between the bottom end surface and the plug is less than a spacing between the reduced diameter section and the plug.
In one embodiment, the valve simulating assembly further comprises a resilient member mounted within the housing, the resilient member being connected to the valve, the resilient member being capable of urging the valve from the open position to the closed position by releasing elastic potential energy.
The invention also provides a blood pump test system which comprises a first box body, a second box body, a pipeline assembly and the valve simulation device according to any one of the above. Wherein, the first box body is provided with a first liquid storage cavity; the second box body is provided with a second liquid storage cavity with a variable volume; the pipeline assembly comprises a connecting pipe and a one-way valve, two ends of the connecting pipe are respectively communicated with the first liquid storage cavity and the second liquid storage cavity, and the one-way valve is arranged in the pipeline cavity so that liquid flows from the first liquid storage cavity to the second liquid storage cavity unidirectionally; the liquid inlet of the valve simulation device is communicated with the second liquid storage cavity, and the liquid outlet of the valve simulation device is communicated with the first liquid storage cavity.
According to the valve simulation device, the valve capable of moving relative to the shell is arranged in the shell, and can move relative to the shell under the action of pressure difference between the liquid inlet and the liquid outlet so as to switch between the closed position and the open position, so that the opening and closing of the heart valve are simulated truly, the blood pump is ensured to be in a relatively real simulation environment, and the accuracy of the service life test result of the blood pump is improved.
Drawings
FIG. 1 is a schematic diagram of one embodiment of a blood pump system of the present invention;
FIG. 2 is a schematic illustration of the blood pump and valve simulation device of FIG. 1 after assembly;
FIG. 3 is a schematic view of the valve simulation device of FIG. 2 in a closed position in cooperation with a blood pump;
FIG. 4 is a schematic view of the valve simulation device of FIG. 3 moved to a closed position in cooperation with a blood pump;
FIG. 5 is a schematic diagram of one embodiment of a valve simulation apparatus of the present invention;
FIG. 6 is an exploded view of the valve simulation device of FIG. 5;
FIG. 7 is a schematic view of the valve simulation device of FIG. 4 in a closed position;
FIG. 8 is a view of P shown in FIG. 7 1 An enlarged view of the location;
FIG. 9 is a schematic view of the valve simulation device of FIG. 7 moved to an open position;
FIG. 10 is the P of FIG. 9 2 An enlarged view of the location;
FIG. 11 is the view P of FIG. 9 3 An enlarged view of the location;
FIG. 12 is a schematic view of the mounting frame of the valve simulation device of FIG. 4;
FIG. 13 is a schematic view of an alternative view of the mount of FIG. 12;
FIG. 14 is a schematic view of the internal structure of the mount of FIG. 12;
fig. 15 is a schematic view of the valve of fig. 6.
Reference numerals:
10. blood pump test system 11, first tank 111, first liquid storage cavity
12. Second tank 121 second liquid storage cavity 13 and pipeline assembly
131. Connecting pipe 132, one-way valve 14 and valve simulation device
20. Blood pump 200, casing 210, and accommodation chamber
211. First cavity 212, second cavity 213, and support table
222. Liquid outlet 230, bottom wall 231 and liquid inlet
240. Step surface 300, mounting rack 310 and mounting seat
311. Seat plate 3111, communication hole 312, sleeve
3121. Bottom end face 320, guide portion 321 and guide rib
3211. Connecting segment 3212, reducing segment 3213 and guiding segment
322. The aperture 330, the blocking portion 331 and the fixing hole
332. Bottom plate 3321, blocking portion 333, and fixing base
400. Valve 410, valve orifice
Detailed Description
In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. The drawings illustrate preferred embodiments of the invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "inner", "outer", "left", "right" and the like are used herein for illustrative purposes only and do not represent the only embodiment.
Referring to fig. 1-4, an embodiment of a valve simulation device and a blood pump testing system 10 is provided, wherein the blood pump testing system 10 is used for simulating a heart environment to measure the service life of a blood pump 20. The blood pump testing system 10 comprises a first housing 11, a second housing 12, a tubing assembly 13 and the valve simulation device 14. The pipeline assembly 13 comprises a connecting pipe 131 and a one-way valve 132, the first box 11 is provided with a first liquid storage cavity 111, the first liquid storage cavity 111 is used for simulating an arterial cavity, the second box 12 is provided with a second liquid storage cavity 121 with a variable volume, and the second liquid storage cavity 121 is used for simulating a ventricular cavity. The valve simulation device 14 is connected to the first housing 11 and the second housing 12, the valve simulation device 14 is used for simulating a heart valve, the blood pump 20 is transmitted in the simulated heart valve, the inlet 21 of the blood pump 20 is located in the second liquid storage cavity 121, and the outlet 22 of the blood pump 20 is located in the first liquid storage cavity 111. The two ends of the connecting pipe 131 are respectively communicated with the first liquid storage cavity 111 and the second liquid storage cavity 121, and the one-way valve 132 is arranged on the connecting pipe 131, so that the liquid in the first liquid storage cavity 111 can flow to the second liquid storage cavity 121 in one way. The volume of the second reservoir 121 may be changed, and as the volume of the second reservoir 121 is compressed to decrease, the fluid pressure in the second reservoir 121 increases, thereby simulating the contraction and expansion of the heart. For example, the second case 12 may elastically deform under the pressing force, and compress the second liquid storage chamber 121 by pressing the second case 12; when the pressing force is canceled, the volume of the second liquid storage chamber 121 is restored.
When the blood pump 20 is tested by using the blood pump testing system 10, the blood pump 20 is first passed through the valve simulation device 14 from the first liquid storage cavity 111 of the first case 11 and is then extended into the second liquid storage cavity 121 of the second case 12, so that the inlet 21 of the blood pump 20 is located in the second liquid storage cavity 121, and the outlet 22 of the blood pump 20 is located in the first liquid storage cavity 111. Next, the blood pump test system 10 is activated to contract the volume of the second liquid storage chamber 121, the liquid in the second liquid storage chamber 121 is squeezed, and a part of the liquid enters the first liquid storage chamber 111 through the valve simulation device 14 (L in fig. 4 1 As shown), a portion of the liquid may enter the blood pump 20 from the inlet 21 of the blood pump 20 and flow from the outlet 22 of the blood pump 20 into the first reservoir 111 (e.g., L in FIG. 4) 2 Shown). The liquid in the first liquid storage cavity 111 flows back to the second liquid storage cavity 121 through the connecting pipe 131 under the action of the one-way valve 132, so that the circulation of the liquid is realized. However, under the blocking effect of the check valve 132, the liquid in the second liquid storage chamber 121 cannot flow into the first liquid storage chamber 111 through the connection pipe 131, that is, the check valve 132 is used to control the liquid in the first liquid storage chamber 111 to flow into the second liquid storage chamber 121 in one direction through the connection pipe 131.
The specific structure of the valve simulation device 14 will be described below.
Referring to fig. 5-7, in one embodiment, the valve simulation device 14 includes a housing 200, a mounting frame 300, and a valve 400. Wherein, the housing 200 is provided with a containing cavity 210, a liquid inlet 231 and a liquid outlet 222; the mounting frame 300 is disposed in the accommodating chamber 210 to mount the blood supply pump 20; the mounting frame 300 or the housing 200 is provided with a blocking part 330; the valve 400 is disposed in the accommodating chamber 210 to separate the liquid inlet 231 from the liquid outlet 222; the valve 400 is provided with a valve hole 410 for communicating the liquid inlet 231 and the liquid outlet 222, the valve 400 has a closed position where the plugged portion 330 plugs the valve hole 410, and an open position where the valve hole 410 is opened by being separated from the plugged portion 330, and the valve 400 is movable relative to the housing 200 by a hydraulic pressure difference between the liquid inlet 231 and the liquid outlet 222, and is switched between the closed position and the open position.
Specifically, the housing 200 may alternatively be provided in a tubular structure. The housing 200 includes a bottom wall 230, a liquid inlet 231 disposed on the bottom wall 230, and a step surface 240 disposed on the bottom wall 230, wherein the step surface 240 surrounds the liquid inlet 231. The liquid inlet 231 and the liquid outlet 222 are disposed at both ends of the receiving chamber 210 in the axial direction of the housing 200 such that the receiving chamber 210 is located between the liquid inlet 231 and the liquid outlet 222. The liquid inlet 231 is used for communicating with the second liquid storage cavity 121 of the second box body 20; the liquid outlet 222 is used for communicating with the first liquid storage cavity 111 of the first box 11. Both the valve 400 and the blocking portion 330 are disposed within the receiving cavity 210, and the blocking portion 330 may extend into the fluid inlet 231 or near the fluid inlet 231. The valve 400 is located on the side of the occlusion 330 facing away from the fluid inlet 231. The valve 400 is movably mounted within the receiving chamber 210 such that the valve 400 is movable relative to the housing 200 to switch between the closed position and the open position.
Referring to fig. 1 and 3, when the blood pump 20 is mounted on the valve simulation device 14, the distal end of the blood pump 20 (i.e. the end provided with the inlet 21 of the blood pump 20) sequentially passes through the liquid outlet 222, the accommodating chamber 210, the mounting frame 300 and the liquid inlet 231 of the valve simulation device 14, so that the inlet 21 of the blood pump 20 passes through the liquid inlet 231 into the second liquid storage chamber 121 of the second housing 20. And, after the blood pump 20 is mounted, the blood pump 20 is fixed in cooperation with the mounting frame 300 to be supported by the mounting frame 300 and fix the blood pump 20.
Referring to fig. 1 and 3, in an initial state, the hydraulic pressure of the first reservoir 111 is higher than that of the second reservoir 121, and the valve simulator 14The valve 400 of the valve 400 is matched with the blocking part 3321 under the hydraulic action of the first liquid storage cavity 111, the valve hole 410 on the valve 400 is blocked by the blocking part 3321, and the valve 400 is in a closed position; at this point, the blocking portion 3321 may support and block the valve 400. Referring to fig. 4, the volume of the second liquid storage chamber 121 is then driven to shrink, the liquid in the second liquid storage chamber 121 is extruded so that the pressure of the liquid inlet 231 is greater than the pressure of the liquid outlet 222, and the liquid in the second liquid storage chamber 121 flows from the liquid inlet 231 of the valve simulation device 14 to the accommodating chamber 210 (as shown by L in fig. 4 1 As shown), and then the valve 400 is pushed from the liquid inlet 231 towards the direction of the accommodating cavity 210, so that the valve 400 is separated from the blocking part 3321, the valve hole 410 of the valve 400 is exposed, the valve 400 is switched to the open position, the liquid in the second liquid storage cavity 121 can enter the area of the accommodating cavity 210 between the valve 400 and the liquid outlet 222 from the liquid inlet 231 and the valve hole 410, and finally flows from the liquid outlet 222 to the first liquid storage cavity 111 of the first box 11; at the same time, part of the liquid in the second liquid storage chamber 121 enters the blood pump 20 from the inlet 21 of the blood pump 20 (L in FIG. 4 2 Shown) and then delivered to the first reservoir 111 via the outlet 22 of the blood pump 20.
Then, the second liquid storage cavity 121 is released to expand the volume, the pressure of the liquid inlet 231 becomes smaller than the pressure of the liquid outlet 222, so that the liquid in the valve simulation device 14 has a trend of flowing towards the liquid inlet 231, and the valve 400 is driven to push from the accommodating cavity 210 towards the liquid inlet 231, so that the valve hole 410 of the valve 400 contacts the blocking part 3321 and is blocked by the blocking part 3321, and the valve 400 is switched to the closed position; at the same time, the liquid in the first tank 11 will also flow back to the second liquid storage chamber 121 of the second tank 12 via the pipe assembly 13, and enter the next circulation.
As can be seen from the above description, the valve simulation device 14 of the present invention, by providing the valve 400 capable of moving relative to the housing 200 inside the housing 200, the valve 400 can move relative to the housing 200 under the action of the hydraulic pressure difference between the liquid inlet 231 and the liquid outlet 222, so that the valve 400 is periodically switched between the closed position and the open position, and the valve hole 410 of the valve 400 is periodically plugged and opened, thereby truly simulating the opening and closing of the heart valve.
Referring to fig. 6 and 7, in some embodiments, the valve 400 is a flat sheet-like structure. The central region of the valve 400 is provided with a valve orifice 410 (as shown in fig. 15), the valve orifice 410 being disposed opposite the blocking portion 3321. The periphery of the valve 400 is in sealing engagement with the inner wall surface of the receiving chamber 210 such that the valve 400 can slide relative to the inner wall surface of the receiving chamber 210. Specifically, the accommodating cavity 210 includes a first cavity 211 that communicates with the liquid outlet 222, and a second cavity 212 that is located between the first cavity 211 and the liquid inlet 231 and communicates with the first cavity 211; the valve 400 is disposed within the second chamber 212 and slidably engages with an inner wall surface of the second chamber 212 such that the valve 400 can reciprocate up and down in the second chamber 212.
Referring to fig. 7, 9 and 10, in one embodiment, the plugging portion 330 includes a base plate 332 disposed at the liquid inlet 231, and a fixing table 333 disposed on the base plate 332; wherein, the outer periphery of the bottom plate 332 is spaced from the inner periphery of the liquid inlet 231; the fixing table 333 protrudes from the bottom plate 332 toward the accommodating cavity 210, so that the valve 400 is sleeved around the ring to seal the valve hole 410.
Specifically, the bottom plate 332 of the plugging portion 330 is circularly disposed, and the outer diameter of the bottom plate 332 is smaller than the inner diameter of the liquid inlet 231, such that a liquid flow channel is formed between the outer periphery of the bottom plate 332 and the inner periphery of the liquid inlet 231, so that the liquid can pass through after the valve 400 moves to the open position. The outer diameter of the fixation table 333 may be consistent with the diameter of the valve orifice 410 of the valve 400 so that the valve 400 can be looped over the fixation table 333 through the valve orifice 410. In other words, the fixing table 333 cooperates with the valve orifice 410, so that the fixing table 333 plays a role in plugging the valve orifice 410, thereby improving the plugging effect of the whole plugging portion 3321330 on the valve orifice 410 and improving the authenticity of the valve simulation device 14. When the valve 400 is in the closed position, the valve 400 is looped over the mounting table 333 on the base plate 332 through the valve orifice 410, and the valve 400 covers the fluid inlet 231 while the valve orifice 410 of the valve 400 is blocked by the mounting table 333 in the closed position.
Optionally, the bottom plate 332 is provided with a stop surface 3321 surrounding the outer periphery of the fixing table 333, and the stop surface 3321 faces the accommodating cavity 210 for fitting the valve 400. When the valve 400 is in the closed position, the valve 400 is attached to the stop surface 3321, and the stop surface 3321 not only can cover the valve hole 410 of the valve 400 to improve the sealing property, but also can support the valve 400 to reduce the occurrence of the situation that the valve 400 is deformed by hydraulic extrusion. Further, the housing 200 is provided with a stepped surface 240 around the inner circumference of the inlet 231 for fitting the valve 400. The step surface 240 may be flush with the stop surface 3321 to collectively support the valve 400.
In view of the flush of the blocking portion 3321 and the step surface 240, the valve 400 can simultaneously abut and fit against the blocking portion 3321 and the step surface 240, so that the blocking portion 3321 and the step surface 240 together support and limit the valve 400. Of course, in other embodiments, only one of the step surface 240 and the stop surface 3321 may be capable of conforming to the valve 400 to support the valve 400.
Referring to fig. 7, 12 and 13, in some embodiments, the mounting frame 300 is fixedly connected to the housing 200, and the mounting frame 300 includes a mounting seat 310 and a guiding portion 320. The mounting seat 310 is fixedly connected with the housing 200, and the guide part 320 extends from the mounting seat 310 toward the liquid inlet 231 and passes through the valve hole 410 of the valve 400, so that the valve 400 can slide along the extending direction of the guide part 320. This allows the valve 400 to slide along the guide 320, and thus, misalignment is less likely to occur.
Since one end of the guide portion 320 extends toward the liquid inlet 231, the blocking portion 330 may be integrally connected with the guide portion 320, i.e., the blocking portion 330 is disposed on the mounting frame 300. Optionally, the blocking portion 330 is connected to an end of the guiding portion 320 facing the liquid inlet 231. The blocking portion 330, the guide portion 320, and the mount 310 are integrally formed. Further, the blocking portion 330 is provided with a fixing hole 332 opposite to the valve hole 410, and the fixing hole 331 can pass through the blood pump 20 to be inserted and matched with the blood pump 20.
Specifically, the fixing hole 331 penetrates the bottom plate 332 and the fixing table 333 of the plugging portion 330, the diameter of the fixing hole 331 may be approximately equal to the diameter of the blood pump 20, and when the blood pump 20 is inserted into the fixing hole 331, the blood pump 20 and the fixing hole 331 may form an interference fit relationship, so that the blood pump 20 is fixed in the fixing hole 331, and finally the blood pump 20 is fixed on the plugging portion 330, and obviously, the blood pump 20 will also form a plugging effect on the fixing hole 331. Of course, in other embodiments, the blocking portion 330 may not be connected to the guiding portion 320. For example, a plurality of connection ribs are provided on the outer periphery of the blocking portion 330, and the plurality of connection ribs are connected to the inner periphery of the liquid inlet 231.
Referring to fig. 7 and 8, there are various designs for fixing the mounting seat 31 of the mounting frame 300. In one embodiment, the accommodating cavity 210 of the housing 200 includes a first cavity 211 communicating with the liquid outlet 222, and a second cavity 212 located between the first cavity 211 and the liquid inlet 231 and communicating with the first cavity 211, and a supporting table 213 is disposed between the second cavity 212 and the first cavity 211; the mounting base 310 is mounted on the support stand 213. Specifically, the inner diameter of the first cavity 211 is larger than the inner diameter of the second cavity 212, so that the support stand 213 is formed between the transition positions of the first cavity 211 and the second cavity 212.
Referring to fig. 7, 8 and 14, alternatively, the mounting base 310 includes a seat plate 311 and a sleeve 312, the seat plate 311 may be a circular plate, and the sleeve 312 may be a cylindrical shape. The seat board 311 is accommodated in the first cavity 211, the diameter of the seat board 311 can be approximately equal to that of the first cavity 211, the seat board 311 is borne on the supporting table 213, the supporting table 213 plays a role in bearing and limiting the seat board 311, the outer side surface of the seat board 311 is in contact fit with the inner peripheral wall of the first cavity 211, and a gap is not formed between the seat board 311 and the shell 200 in the radial direction of the shell 200, so that the seat board 311 plays a role in sealing the first cavity 211. The seat plate 311 may be fixed to the support stand 213 by means of adhesive bonding and bolting, thereby fixing the mount 310 and the entire mount 300 to the housing 200.
The mount 310 is provided with a hole communicating the first cavity 211 and the second cavity 212. Specifically, the seat plate 311 of the mounting base 310 is provided with a communication hole 3111, the communication hole 3111 penetrates the entire seat plate 311 in the thickness direction, and the communication hole 3111 is disposed coaxially with the accommodating chamber 210. The first and second cavities 211 and 212 communicate with each other through the communication hole 3111. The number of the communication holes 3111 may be one or plural. In one embodiment, the number of the communication holes 3111 is one, the diameter of the communication holes 3111 may be larger than the diameter of the blood pump 20, and when the blood pump 20 is inserted into the communication holes 3111, a circulation gap not filled by the blood pump 20 remains in the communication holes 3111, and a hole for communicating the first cavity 211 with the second cavity 212 is formed from the communication holes 3111, and the hole may allow liquid to circulate, that is, the liquid in the second cavity 212 may enter the first cavity 211 through the hole. In another embodiment, the number of the communication holes 3111 is plural, wherein one communication hole 3111 has a diameter equal to that of the blood pump 20, so that the blood pump 20 is fixedly inserted into the communication hole 3111, and the other communication holes 3111 form pores for communicating the first cavity 211 with the second cavity 212, so that liquid can enter the first cavity 211 from the second cavity 212 through the overflow hole.
The sleeve 312 of the mount 310 extends from the seat plate 311 toward the second cavity 212, and the sleeve 312 surrounds the outer circumference of the guide 320 such that the sleeve 312 is received in the second cavity 212. The outer diameter of the sleeve 312 may be substantially equal to the diameter of the second cavity 212 such that the side circumferential surface of the sleeve 312 is in contact engagement with the inner circumferential wall of the second cavity 212 such that there is no gap between the sleeve 312 and the housing 200 in the radial direction of the housing 200, thereby causing the sleeve 312 to seal against the second cavity 212. The diameter of the communication hole 3111 may be smaller than the inner diameter of the sleeve 312, i.e., the sleeve 312 is disposed around the communication hole 3111, and the communication hole 3111 communicates with the inner cavity of the sleeve 312.
Referring to fig. 9, 13 and 14, in some embodiments, the guide portion 320 is provided with an aperture that communicates the first cavity 211 with the second cavity 212. Specifically, the guiding portion 320 includes a plurality of guiding ribs 321, and the plurality of guiding ribs 321 are arranged at intervals in a ring shape and extend from the mounting base 310 toward the liquid inlet 231. An aperture 322 is formed between two adjacent guide ribs 321, and the aperture 322 can communicate the first cavity 211 and the second cavity 212 with each other.
One end of the guide rib 321 is fixedly connected with the seat plate 311, the other end of the guide rib 321 is fixedly connected with the plugging portion 330, and the plurality of guide ribs 321 are arranged around the communication hole 3111, so that the plurality of guide ribs 321 are arranged at intervals along the circumferential direction of the communication hole 3111. The aperture of the valve hole 410 may be larger than the diameter of the small grating cylinder formed by the guide rib 321, so that the guide rib 321 and the valve 400 may be prevented from interfering.
In an embodiment, the guiding rib 321 may include a connection section 3211, a diameter-reduced section 3212 and a guiding section 3213, where the connection section 3211 is fixedly connected to the seat plate 311, and the connection section 3211 may extend from the mounting seat 310 toward the liquid inlet 231 along the axial direction of the housing 200. The reducing section 3212 extends inward in the radial direction from one end of the connecting section 3211 facing the liquid inlet 231, and the guide section 3213 extends from the inner end of the reducing section 3212 toward the liquid inlet 231; the valve 400 is wrapped around the outer periphery of the guide segments 3213 of the plurality of guide ribs 321.
Specifically, the reduced diameter section 3212 is connected between the connection section 3211 and the guide section 3213, the extension directions of the connection section 3211 and the guide section 3213 are parallel to each other, and the connection section 3211 and the reduced diameter section 3212 may be perpendicular to each other. In popular terms, the connecting sections 3211 of the guide ribs 321 enclose a large grating cylinder, the guide sections 3213 of the guide ribs 321 enclose a small grating cylinder, and the diameter of the large grating cylinder is larger than that of the small grating cylinder. The valve 400 is surrounded by the valve hole 410 on the outer periphery of the plurality of guide ribs 321, namely, the periphery of the small grid cylinder. And, the valve orifice 410 has a diameter greater than the diameter of the small grating cylinder and less than the diameter of the large grating cylinder. So that the valve 400 does not easily contact the guide ribs 321 to interfere during movement of the valve 400. At the same time, the large grating cylinder has a relatively large diameter, thereby reducing the flow resistance of the liquid in the second cavity 212, improving the smoothness of the liquid flow and reducing the vortex, and improving the authenticity of the valve simulation device 14 simulation and the accuracy of the blood pump 20 service life test result. This design can reduce the turbulence of the fluid relative to separating the blood pump 20 from the valve orifice 410.
Referring to fig. 7, 9 and 14, it is contemplated herein that when the valve 400 is switched from the closed position to the open position, the valve 400 slides toward the reduced diameter segment 3212 of the guide 320, and if the valve 400 slides into contact with the reduced diameter segment 3212, the reduced diameter segment 3212 may partially occlude the valve orifice 410 of the valve 400. In view of this, to avoid this, optionally, sleeve 312 of mount 310 has a bottom end surface 3121, bottom end surface 3121 being disposed facing valve 400, bottom end surface 3121And a gap D between the blocking portions 3321 1 Is smaller than the distance D between the diameter-reducing segment 3212 and the blocking part 3321 2 D is 1 ＜D 2 。
When the valve 400 is switched from the closed position to the open position, the bottom end surface 3121 of the sleeve 312 contacts the valve 400 before the reduced diameter segment 3212 of the guide 320, thereby limiting the valve 400 from sliding further toward the reduced diameter segment 3212 of the guide 320, so that the valve 400 is prevented from abutting against the reduced diameter segment 3212 and the reduced diameter segment 3212 shields the valve orifice 410. Thus, by engaging sleeve 312 with blocking portion 3321, the stroke of valve 400 to slide up and down can be limited. In fact, when the valve 400 is moved away from the blocking portion 3321 to be separated from the blocking portion 3321, the valve orifice 410 is switched to the open position.
When pressure is applied to the second tank 12, the second reservoir 121 is compressed and the pressure increases, and the liquid in the second reservoir 121 enters the liquid inlet 231 and applies pressure to the valve 400, thereby overcoming the liquid pressure in the second chamber 212, causing the valve 400 to move upward and disengage from the blocking portion 3321 and the step surface 240. Referring to fig. 10, when the fixing table 333 is completely separated from the valve hole 410 during the upward movement of the valve 400, the valve 400 is in an open position relative to the mounting frame 300, so that the mounting frame 300 completely opens the valve hole 410, and at this time, the liquid in the liquid inlet 231 enters the portion of the second cavity 212 above the valve 400 through the valve hole 410, and then flows into the first liquid storage cavity 111 through the holes 322 between the guide ribs 321, the communication holes 3111, the first cavity 211, and the liquid outlet 222.
Referring to fig. 1 and 3, prior to testing the life of the blood pump 20, the blood pump 20 is inserted through the valve simulation device 14. Specifically, the distal end of the blood pump 20 extends from the first liquid storage chamber 111 of the first housing 11 through the liquid outlet 222 of the valve simulation device 14, and the liquid outlet 222 extends into the second liquid storage chamber 121 of the second housing 12 through the communication hole 3111 of the mounting frame 300 in the valve simulation device 14, the valve hole 410 of the valve 400, the blocking portion 330, and the liquid inlet 231, such that the inlet 21 of the blood pump 20 is located in the second liquid storage chamber 121, and the outlet 22 of the blood pump 20 is located in the first liquid storage chamber 111. Wherein, the blood pump 20 forms an interference fit with the fixing hole 331 of the blocking portion 330, thereby fixing the blood pump 20 on the blocking portion 330. The second liquid storage cavity 121 and the liquid inlet 231 are always communicated with each other, and the first liquid storage cavity 111, the first cavity 211 and the second cavity 212 are always communicated with each other. As shown in fig. 3, in the initial state, the pressure in the second cavity 212 is greater than the pressure in the liquid inlet 231, so that the valve 400 abuts against the blocking portion 3321 and the step surface 240, the mounting frame 300 has a blocking effect on the valve hole 410, the valve 400 is in the closed position, and the blood pump 20 will also have a blocking effect on the fixing hole 331, so that the liquid in the liquid inlet 231 cannot enter the second cavity 212, and the liquid in the second liquid storage cavity 121 cannot enter the first liquid storage cavity 111 through the accommodating cavity 210.
As shown in fig. 4, when pressure is applied to the second tank 12 to compress the second liquid storage chamber 121, the liquid in the second liquid storage chamber 121 flows toward the liquid inlet 231, the pressure at the liquid inlet 231 increases, so that the pressure at the liquid inlet 231 is greater than the pressure at the liquid outlet 222, and thus the liquid in the liquid inlet 231 pushes the valve 400 to move from the closed position toward the liquid outlet to the open position, so that the liquid in the liquid inlet 231 can pass through the valve hole 410 to enter the second chamber 212 of the valve simulation device, and then enter the first liquid storage chamber 111 from the second chamber 212 and the first chamber 211 through the liquid outlet 222.
Of course, the liquid in the second liquid storage chamber 121 may also enter the blood pump 20 through the inlet 21 of the blood pump 20 and flow from the outlet 22 of the blood pump 20 into the first liquid storage chamber 111. When the volume of the second tank 12 is expanded, the second reservoir 121 returns to its original state, the pressure of the liquid outlet 222 is greater than the pressure in the liquid inlet 231, the valve 400 will move from the open position toward the liquid inlet 231 to return to the closed position, and the liquid in the first reservoir 111 can flow back to the second reservoir 121 through the check valve 132 and the connection pipe 131 to circulate the liquid back to the second tank 12.
Therefore, the volume of the second liquid storage cavity 121 is periodically changed by periodically compressing the second case 12, so as to adjust the pressure difference between the liquid inlet 231 and the second cavity 212, so that the valve 400 is periodically switched between the closed position and the open position, and the valve hole 410 is periodically plugged and opened, so that the opening and closing of the heart valve are truly simulated, the blood pump 20 is ensured to be in a truly simulated environment, and the accuracy of the service life test result of the blood pump 20 is improved.
In view of the fact that the blood pump 20 is disposed in the valve hole 410 in a penetrating manner, when the valve 400 is in the open position, liquid flowing from the valve hole 410 can pass through the holes 322 among the guide ribs 321, so that the blood pump 20 is surrounded by the whole circumference of the blood pump 20, and then flows along the circumferential wall of the blood pump 20 along the axial direction to the liquid outlet 222, so that vortex generated in the flowing process of the liquid is reduced, influence of the open and close state of the true heart valve on the flow field of the blood pump 20 is simulated to the greatest extent, the simulation reality of the valve simulation device 14 is further improved, and the accuracy of the service life test result of the blood pump 20 is improved.
In view of the distance D between the bottom end surface 3121 and the closure 3321 1 Is smaller than the distance D between the diameter-reducing segment 3212 and the blocking part 3321 2 When the valve 400 is in the open position, the valve 400 can be abutted against the bottom end surface 3121, and through the interference action of the sleeve 312, the valve 400 and the reduced diameter section 3212 can be effectively prevented from contacting each other, so that the reduced diameter section 3212 is prevented from shielding the valve hole 410, a larger flow area of blood is ensured, the flow resistance of liquid in the second cavity 212 is reduced, the smoothness of the liquid flow is improved, the vortex is reduced, the authenticity of the valve simulation device 14 simulation and the accuracy of the service life test result of the blood pump 20 are improved.
In some embodiments, the valve orifice 410 has an aperture A and the fixed orifice 331 has an aperture B, where 1.5:1.ltoreq.A/B.ltoreq.3: 1. for example, the specific value of A/B may be 1.5:1, 2:1 or 3:1, etc. In view of the fact that the aperture of the fixed orifice 331 is approximately equal to the diameter of the blood pump 20, the blood pump 20 still passes through the valve orifice 410 when the valve 400 is in the open position, so that it is ensured that there is enough space for the fluid to flow out of the valve orifice 410 and that the fluid can flow out against the blood pump 20, the influence of the heart valve on the flow field of the blood pump 20 is simulated as much as possible, and the authenticity of the simulation of the valve simulation device 14 and the accuracy of the service life test result of the blood pump 20 are improved.
In some embodiments, the valve simulation device 14 further includes a resilient member (not shown) mounted within the housing 200; the elastic member is coupled to the valve 400, the elastic member being capable of urging the valve 400 from the open position to the closed position by releasing elastic potential energy. For example, a groove is provided on the step surface 240; the elastic member is a spring, one end of the spring is fixed in the groove, and the other end of the spring is connected with the valve 400. The spring is in an initial state when the valve 400 is in the closed position; when the valve 400 is moved to the open position by the hydraulic pressure of the inlet 231, the spring is stretched to accumulate elastic potential energy; when the hydraulic pressure of the inlet 231 drops, the spring releases the elastic potential energy and rapidly pulls the valve 400 back to the closed position.
Of course, in other embodiments, the resilient member may also be disposed between the valve 400 and the mount 310 of the mount 300. When the valve 400 moves to the open position under the hydraulic pressure of the liquid inlet 231, the elastic member is compressed to accumulate elastic potential energy; when the hydraulic pressure of the inlet 231 drops, the elastic member releases the elastic potential energy to rapidly push the valve 400 back to the closed position.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims (10)

1. A valve simulation device, the valve simulation device comprising:
the shell is provided with a containing cavity, a liquid inlet and a liquid outlet;
the mounting frame is arranged in the accommodating cavity so as to mount the blood supply pump; the mounting frame or the shell is provided with a plugging part; and
the valve is arranged in the accommodating cavity so as to separate the liquid inlet from the liquid outlet; the valve is provided with a valve hole for communicating the liquid inlet and the liquid outlet, the valve is provided with a closed position for blocking the valve hole by the blocking part and an open position separated from the blocking part to open the valve hole, and the valve can move relative to the shell under the action of a hydraulic pressure difference between the liquid inlet and the liquid outlet and is switched between the closed position and the open position.
2. The valve simulation device according to claim 1, wherein the valve orifice is provided in a central region of the valve, and a peripheral edge of the valve is in sealing engagement with an inner wall surface of the receiving chamber so that the valve can slide with respect to the inner wall surface of the receiving chamber.
3. The valve simulation device of claim 1, wherein the occlusion comprises a bottom plate disposed at the liquid inlet, and a fixed table disposed on the bottom plate; wherein the fixing table is arranged protruding from the bottom plate towards the accommodating cavity so as to enable the valve annulus to seal the valve hole; the outer periphery of the bottom plate and the inner periphery of the liquid inlet are arranged at intervals, the bottom plate is provided with a stop surface encircling the periphery of the fixed table, and the stop surface faces the accommodating cavity so as to be attached to the valve.
4. The valve simulation device of any one of claims 1 to 3, wherein the mounting frame comprises a mount and a guide; wherein the mounting seat is fixedly connected with the shell; the guide part extends from the mounting seat towards the liquid inlet and penetrates through the valve hole of the valve to be connected with the blocking part, so that the valve can slide along the extending direction of the guide part.
5. The valve simulation device of claim 4, wherein the housing cavity of the housing comprises a first cavity communicated with the liquid outlet and a second cavity positioned between and communicated with the first cavity, and a support table is arranged between the second cavity and the first cavity; the mounting seat comprises a seat plate and a sleeve; the seat board is arranged on the supporting table and is provided with a communication hole which is opposite to the fixing hole and used for the blood pump to pass through; the sleeve is connected with the seat plate and surrounds the periphery of the guide part, and extends from the seat plate to the second cavity to be in contact fit with the inner peripheral wall of the second cavity.
6. The valve simulation device of claim 4 wherein at least one of the mount and the guide is provided with an aperture that communicates the first cavity with the second cavity; and/or the plugging part is penetrated with a fixing hole opposite to the valve hole, and the fixing hole can be used for the blood pump to pass through to be matched with the blood pump in an inserting way.
7. The valve simulation device of claim 6 wherein the guide portion comprises a plurality of guide ribs, the plurality of guide ribs being annularly spaced apart and extending from the mount toward the fluid inlet; and the pore is formed between two adjacent guide ribs.
8. The valve simulation device of claim 7, wherein the guide ribs comprise a connecting section, a reducing section, and a guide section; the connecting section is connected with the mounting seat and extends from the mounting seat towards the liquid inlet; the diameter-reducing section extends inwards along the radial direction from one end of the connecting section, which faces the liquid inlet; the guide section extends from the inner end of the diameter-reducing section towards the liquid inlet; the valve ring is sleeved on the guide section; the mount has a bottom end surface facing the valve, and a spacing between the bottom end surface and the plug is less than a spacing between the reduced diameter section and the plug.
9. A valve simulation device according to any of claims 1-3, further comprising a resilient member mounted within the housing, the resilient member being connected to the valve, the resilient member being capable of urging the valve from the open position to the closed position by releasing elastic potential energy.
10. A blood pump testing system, the blood pump testing system comprising:
the first box body is provided with a first liquid storage cavity;
the second box body is provided with a second liquid storage cavity with a variable volume;
the pipeline assembly comprises a connecting pipe and a one-way valve, two ends of the connecting pipe are respectively communicated with the first liquid storage cavity and the second liquid storage cavity, and the one-way valve is arranged in the pipeline cavity so that liquid flows from the first liquid storage cavity to the second liquid storage cavity unidirectionally; and
the valve simulation device of any one of claims 1 to 9, wherein a liquid inlet of the valve simulation device is in communication with the second liquid storage chamber and a liquid outlet of the valve simulation device is in communication with the first liquid storage chamber.
CN202310297675.6A 2023-03-23 2023-03-23 Valve simulation device and blood pump test system Pending CN116492112A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310297675.6A CN116492112A (en) 2023-03-23 2023-03-23 Valve simulation device and blood pump test system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310297675.6A CN116492112A (en) 2023-03-23 2023-03-23 Valve simulation device and blood pump test system

Publications (1)

Publication Number Publication Date
CN116492112A true CN116492112A (en) 2023-07-28

Family

ID=87329347

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310297675.6A Pending CN116492112A (en) 2023-03-23 2023-03-23 Valve simulation device and blood pump test system

Country Status (1)

Country Link
CN (1) CN116492112A (en)

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