Test device
By optimizing the floor plan layout of the simulation chamber and the stacking arrangement of the connecting pipes, the problem of the large area occupied by the dual ventricle auxiliary device testing equipment was solved, achieving a compact equipment design and high-precision testing results.
Patent Information
- Application Number
- CN202520597982.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-01
- Publication Date
- 2026-03-06
- Estimated Expiration
- 2035-04-01
AI Technical Summary
Existing in vitro performance testing equipment for biventricular assist devices occupies a large area, making it difficult to effectively reduce its size.
By altering the floor plan of the simulation chamber and stacking the connecting pipes, a compact modular structure is designed to utilize the space in the vertical direction, forming a closed and circulating loop, thus reducing the floor area occupied.
It effectively reduces the footprint of the testing equipment, improves the space utilization of the testing equipment, ensures testing accuracy and flexibility, and adapts to the dynamic pressure simulation of the human circulatory system.
Smart Images
Figure CN223976862U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of medical device technology, and in particular to a testing device. Background Technology
[0002] After a biventricular assist device (BAV) is implanted in the human body, its working environment is the human circulatory system. The BAV and the circulatory system influence each other. The BAV needs to be tested over a long period of time using a testing device that simulates the circulatory system. However, the testing equipment currently used for in vitro performance testing of BAV occupies a large area. Utility Model Content
[0003] Based on this, this application provides a testing device to reduce the area occupied by the testing device.
[0004] A testing device includes: a first module and a second module;
[0005] The simulation chambers of both the first and second modules include a pulsation chamber, a compliance chamber, and a reservoir chamber, and the simulation chambers of the two modules are respectively located on both sides of the first central reference line; wherein, the first central reference line and the second central reference line are perpendicular to each other; the pulsation chamber and the compliance chamber of the same module are respectively located on both sides of the second central reference line, and along the extension direction of the first central reference line, the reservoir chamber is located between the pulsation chamber and the compliance chamber;
[0006] The connecting pipes of the first module and the second module each include a first connecting pipe, a second connecting pipe and a third connecting pipe. The liquid storage chamber and the pulsation chamber in the same module are connected by the first connecting pipe, the pulsation chamber and the compliance chamber in the same module are connected by the second connecting pipe, and the liquid storage chamber and the compliance chamber in different modules are connected by the third connecting pipe; wherein, the third connecting pipes in the two modules are arranged in a cross-layered manner.
[0007] In one embodiment, the second and third connecting pipes in the same module are arranged in a cross-layered manner.
[0008] In one embodiment, at least two of the following features are included:
[0009] The pulsation chambers of the first module and the second module are symmetrically arranged based on the first central baseline;
[0010] The compliance chambers of the first module and the second module are symmetrically arranged based on the first central baseline;
[0011] The liquid storage chambers of the first module and the second module are symmetrically arranged based on the first central baseline.
[0012] In one embodiment, the compliance chamber is provided with a regulating valve that can regulate the pressure in the compliance chamber.
[0013] In one embodiment, the first connecting pipe includes a first main pipe and a first one-way valve. The first one-way valve is disposed in the first main pipe and can control the flow of fluid in the first main pipe from the storage chamber to the pulsation chamber.
[0014] In one embodiment, the second connecting pipe includes a main pipe and a first branch pipe and a second branch pipe connected in parallel. One port of the main pipe is connected to the compliance chamber, and the other port of the main pipe is connected to one port of the first branch pipe and the second branch pipe. The other end of the first branch pipe is connected to the pulsation chamber, and the other port of the second branch pipe is connected to the ventricular assist device inside the pulsation chamber. The first branch pipe is equipped with a second one-way valve, which can control the flow of fluid in the first branch pipe from the pulsation chamber to the main pipe. The second branch pipe is equipped with a first flow sensor, which can detect the pumped fluid volume of the ventricular assist device. The main pipe is equipped with a second flow sensor, which can detect the flow rate of fluid flowing through the main pipe.
[0015] In one embodiment, the first branch pipe and the second branch pipe include a straight pipe section and a curved pipe section, with the curved pipe section smoothly connected between the straight pipe section and the main pipe.
[0016] In one embodiment, the radius of curvature of the curved pipe segment is R, which satisfies the relationship: 140mm≤R≤150mm.
[0017] In one embodiment, the first branch pipe and the second branch pipe are arranged along the height direction; the height direction is perpendicular to both the first center reference line and the second center reference line.
[0018] In one embodiment, the third connecting pipe includes a third main pipe and a damper, the damper being able to adjust the flow resistance experienced by the fluid within the third main pipe.
[0019] The aforementioned testing equipment, by changing the planar layout of the simulation chambers in the first and second modules and making full use of the space in the height direction by stacking some connecting pipes, makes the overall structure of the first and second modules more compact, and reduces the planar area occupied by the circuit formed together, which is beneficial to reducing the area occupied by the testing equipment. Attached Figure Description
[0020] Figure 1 This is a diagram showing the arrangement of the pulsating chamber, compliance chamber, and reservoir chamber in a dual-ventricle auxiliary device of a related technology.
[0021] Figure 2 This is a perspective view of a test apparatus according to an embodiment of this application.
[0022] Figure 3 for Figure 2 Enlarged view of point A in the middle.
[0023] Figure 4This is a layout diagram of a first module and a second module according to an embodiment of this application.
[0024] Figure label:
[0025] 01a, First pulsation chamber; 01b, Second pulsation chamber; 02a, First compliance chamber; 02b, Second compliance chamber; 03a, First reservoir chamber; 03b, Second reservoir chamber; 04a, First connecting pipe one; 04b, First connecting pipe two; 05a, Second connecting pipe one; 05b, Second connecting pipe two; 06a, Third connecting pipe one; 06b, Third connecting pipe two;
[0026] 100. Test equipment; S1. First center baseline; S2. Second center baseline; 1. Pulsation chamber; 1a. First pulsation chamber; 1b. Second pulsation chamber; 2. Compliance chamber; 20. Control valve; 2a. First compliance chamber; 2b. Second compliance chamber; 3. Liquid storage chamber; 3a. First liquid storage chamber; 3b. Second liquid storage chamber; 4. First connecting pipe; 4a. First connecting pipe one; 4b. First connecting pipe two; 41. First main pipe; 42. First single... 5. Second connecting pipe; 5a. Second connecting pipe one; 5b. Second connecting pipe two; 51. Main pipe; 52. First branch pipe; 53. Second branch pipe; 521. Straight pipe section; 522. Curved pipe section; 54. First flow sensor; 55. Second flow sensor; 56. Second check valve; 6. Third connecting pipe; 6a. Third connecting pipe one; 6b. Third connecting pipe two; 61. Third main pipe; 62. Damper; 7. Equipment base. Detailed Implementation
[0027] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.
[0028] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.
[0029] Furthermore, where the terms "first" and "second" appear, these terms are merely descriptive and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0030] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0031] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0032] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.
[0033] The blood flow in the human body follows this path: left atrium → left ventricle → systemic circulation → right atrium → right ventricle → pulmonary circulation → left atrium. A test device capable of testing biventricular assist devices should include at least two pulsating chambers (first and second pulsating chambers), two compliance chambers (first and second compliance chambers), and two reservoirs (first and second reservoirs). The first reservoir, first pulsating chamber, first compliance chamber, second reservoir, second pulsating chamber, and second compliance chamber are sequentially connected, and the second compliance chamber is also connected to the first reservoir, thus constructing a closed and circulating circuit within the test device.
[0034] In this circuit, the fluid flow direction is configured as follows: first reservoir → first pulsating chamber → first compliant chamber → second reservoir → second pulsating chamber → second compliant chamber → first reservoir, thus simulating the blood flow direction in the human body: left atrium → left ventricle → systemic circulation channel → right atrium → right ventricle → pulmonary circulation channel → left atrium. The left ventricular assist device of the biventricular assist device is located in the first pulsating chamber, and the right ventricular assist device is located in the second pulsating chamber. Under the driving action of the biventricular assist device, the fluid in the circuit circulates.
[0035] like Figure 1 As shown, in the related technology, the first liquid storage chamber 03a, the first pulsation chamber 01a, the first compliance chamber 02a, the second liquid storage chamber 03b, the second pulsation chamber 01b, and the second compliance chamber 02b are connected in sequence, making the entire circuit rectangular. However, with this arrangement, the circuit occupies a large area, resulting in a larger size for placing the test equipment. Therefore, a large space is required to meet the needs of placing the test equipment, which is not conducive to the placement of the test equipment.
[0036] See Figures 2 to 4 As shown, the test device 100 according to some embodiments of this application includes a first module and a second module. The simulation chambers of both the first and second modules include a pulsation chamber 1, a compliance chamber 2, and a reservoir chamber 3, and the simulation chambers of the two modules are respectively disposed on both sides of a first central reference line S1. The first central reference line S1 is perpendicular to the second central reference line S2. The pulsation chamber 1 and the compliance chamber 2 of the same module are respectively disposed on both sides of the second central reference line S2, and the reservoir chamber 3 is disposed between the pulsation chamber 1 and the compliance chamber 2 along the extending direction of the first central reference line S1.
[0037] The connecting pipes of both the first and second modules include a first connecting pipe 4, a second connecting pipe 5, and a third connecting pipe 6. The liquid storage chamber 3 and the pulsation chamber 1 in the same module are connected through the first connecting pipe 4, the pulsation chamber 1 and the compliance chamber 2 in the same module are connected through the second connecting pipe 5, and the compliance chamber 2 and the liquid storage chamber 3 in different modules are connected through the third connecting pipe 6. The third connecting pipes in the two modules are arranged in a cross-layered manner.
[0038] It should be understood that in the following description, the pulse chamber 1 in the first module will be referred to as the first pulse chamber 1a, the compliance chamber 2 in the first module as the first compliance chamber 2a, the liquid storage chamber 3 in the first module as the first liquid storage chamber 3a, the pulse chamber 1 in the second module as the second pulse chamber 1b, the compliance chamber 2 in the second module as the second compliance chamber 2b, and the liquid storage chamber 3 in the second module as the second liquid storage chamber 3b. Similarly, the first connecting pipe 4 in the first module will be referred to as the first connecting pipe one 4a, the first connecting pipe 4 in the second module as the first connecting pipe two 4b, the second connecting pipe 5 in the first module as the second connecting pipe one 5a, the second connecting pipe 5 in the second module as the second connecting pipe two 5b, the third connecting pipe 6 in the first module as the third connecting pipe one 6a, and the third connecting pipe 6 in the second module as the third connecting pipe two 6b.
[0039] The first connecting pipe 4a is connected between the first liquid storage chamber 3a and the first pulsating chamber 1a to achieve the effect of fluid flow between the first liquid storage chamber 3a and the first pulsating chamber 1a; the second connecting pipe 4b is connected between the second liquid storage chamber 3b and the second pulsating chamber 1b to achieve the effect of fluid flow between the second liquid storage chamber 3b and the second pulsating chamber 1b. The two second connecting pipes 5 are the second connecting pipe 5a and the second connecting pipe 5b, respectively. The second connecting pipe 5a is connected between the first pulsating chamber 1a and the first compliant chamber 2a to achieve the effect of fluid flow between the first pulsating chamber 1a and the first compliant chamber 2a; the second connecting pipe 5b is connected between the second pulsating chamber 1b and the second compliant chamber 2b to achieve the effect of fluid flow between the second pulsating chamber 1b and the second compliant chamber 2b. The third connecting pipe 6a is connected between the first liquid storage chamber 3a and the second compliant chamber 2b to achieve the effect of fluid flowing between the first liquid storage chamber 3a and the second compliant chamber 2b; the third connecting pipe 6b is connected between the second liquid storage chamber 3b and the first compliant chamber 2a to achieve the effect of fluid flowing between the second liquid storage chamber 3b and the first compliant chamber 2a.
[0040] This results in the first liquid storage chamber 3a, the first pulsating chamber 1a, the first compliant chamber 2a, the second liquid storage chamber 3b, the second pulsating chamber 1b, and the second compliant chamber 2b forming a closed and circulating loop. The flow direction of the fluid in the loop is configured as follows: first liquid storage chamber 3a → first pulsating chamber 1a → first compliant chamber 2a → second liquid storage chamber 3b → second pulsating chamber 1b → second compliant chamber 2b → first liquid storage chamber 3a.
[0041] Combination Figures 2 to 4 As shown, in some embodiments, the first center reference line S1 is parallel to the length direction of the test device 100 (e.g., ...). Figure 2 The second center reference line S2 is parallel to the X-direction shown in the figure, and the width direction of the test equipment 100 is parallel to the X-direction shown in the figure. Figure 2 The Y-direction shown is arranged in parallel. The first liquid storage chamber 3a, the first pulsation chamber 1a and the first compliance chamber 2a are all located to the left of the first central reference line S1, while the second liquid storage chamber 3b, the second pulsation chamber 1b and the second compliance chamber 2b are all located to the right of the first central reference line S1. That is, the simulation chambers of the two modules are respectively located on both sides of the first central reference line S1.
[0042] Based on the second central reference line S2, the first pulsating chamber 1a and the second pulsating chamber 1b are located behind the second central reference line S2, and the first compliance chamber 2a and the second compliance chamber 2b are located in front of the second central reference line S2. This ensures that, to the left of the first central reference line S1, the first pulsating chamber 1a and the first compliance chamber 2a extend along the direction of extension of the first central reference line S1 (e.g., ...). Figure 2 The arrangement is as shown in the X direction, and to the right of the first central reference line S1, the second pulsating chamber 1b and the second compliant chamber 2b extend along the extension direction of the first central reference line S1 (as shown in the X direction). Figure 2 The X-axis layout shown is illustrated. Combined with... Figure 2 and Figure 4 As shown, in some embodiments of this application, the connecting line between the first pulsating chamber 1a and the first compliant chamber 2a is parallel to the first central reference line S1, and the connecting line between the second pulsating chamber 1b and the second compliant chamber 2b is parallel to the first central reference line S1.
[0043] However, this application is not limited to this. In another embodiment of this application, the connecting line between the first pulsating chamber 1a and the first compliant chamber 2a forms an angle with the first central reference line S1, and the connecting line between the second pulsating chamber 1b and the second compliant chamber 2b is parallel to the first central reference line S1; or, the connecting line between the first pulsating chamber 1a and the first compliant chamber 2a is parallel to the first central reference line S1, and the connecting line between the second pulsating chamber 1b and the second compliant chamber 2b forms an angle with the first central reference line S1; or, the connecting line between the first pulsating chamber 1a and the first compliant chamber 2a forms an angle with the first central reference line S1, and the connecting line between the second pulsating chamber 1b and the second compliant chamber 2b forms an angle with the first central reference line S1.
[0044] Furthermore, along the extension direction of the first central reference line S1, the first liquid storage chamber 3a is located between the first pulsating chamber 1a and the first compliant chamber 2a, and the second liquid storage chamber 3b is located between the second pulsating chamber 1b and the second compliant chamber 2b. For example, see [reference needed]. Figure 2 and Figure 4 As shown, in one embodiment, along the width direction of the testing device 100, the first liquid reservoir 3a is located to the left of the first pulsating chamber 1a and the first compliant chamber 2a (i.e., the first liquid reservoir 3a is located to the left of the line connecting the first pulsating chamber 1a and the first compliant chamber 2a), and the second liquid reservoir 3b is located to the right of the second pulsating chamber 1b and the second compliant chamber 2b (the second liquid reservoir 3b is located to the right of the line connecting the second pulsating chamber 1b and the second compliant chamber 2b). This arrangement makes the height direction of the testing device 100 (e.g., ...) more suitable for the test device 100. Figure 2 In the Z-direction shown, the second connecting pipe 5a and the third connecting pipe 6a are stacked; the second connecting pipe 5b and the third connecting pipe 6b are stacked; and the third connecting pipe 6a and the third connecting pipe 6b are stacked. That is, the second connecting pipes 5 and 6 in the same module are stacked crosswise, and the third connecting pipes 6 in two modules are stacked crosswise. Thus, by changing the planar layout of the simulation chambers in the first and second modules and making some connecting pipes stacked to make full use of the space in the height direction, the overall structure of the first and second modules becomes more compact, and the planar area occupied by the circuit formed together is reduced, which is beneficial to reducing the area occupied by the test equipment 100.
[0045] Alternatively, in another embodiment, along the width direction of the testing device 100, the first reservoir 3a is located to the right of the first pulsating chamber 1a and the first compliant chamber 2a (i.e., the first reservoir 3a is located to the right of the line connecting the first pulsating chamber 1a and the first compliant chamber 2a), and the second reservoir 3b is located to the left of the second pulsating chamber 1b and the second compliant chamber 2b (the second reservoir 3b is located to the left of the line connecting the second pulsating chamber 1b and the second compliant chamber 2b). This arrangement makes the height direction of the testing device 100 (e.g., ...) more suitable for the test device 100. Figure 1 In the Z-direction shown, the third connecting pipe 6a and the third connecting pipe 6b are stacked, that is, the third connecting pipes 6 in the two modules are stacked crosswise. Thus, by changing the planar layout of the simulation chambers in the first and second modules and making some connecting pipes stacked to fully utilize the space in the vertical direction, the overall structure of the first and second modules becomes more compact, the planar area occupied by the circuit they form is reduced, and this helps to reduce the area occupied by the test equipment 100.
[0046] It should be noted that the pulsation chamber 1, compliance chamber 2 and liquid storage chamber 3 in the two modules all have a certain height, allowing two connecting pipes to be connected along the height direction. Thus, the second connecting pipe 5 and the third connecting pipe 6 in the same module can be cross-stacked, as can the third connecting pipe 6 in the two modules be cross-stacked.
[0047] Compared to the scheme that only allows the third connecting pipes 6 in the two modules to be stacked in a cross manner, the scheme that allows the third connecting pipes 6 in the two modules to be stacked in a cross manner, and the second connecting pipes 5 and the third connecting pipes 6 in the same module to also be stacked in a cross manner, can further utilize the space in the height direction, thereby making the overall structure of the first module and the second module more compact, and the plane area occupied by the circuit formed together is smaller.
[0048] In some embodiments of this application, the first pulsating chamber 1a and the second pulsating chamber 1b are symmetrically arranged based on the first central reference line S1; the first compliance chamber 2a and the second compliance chamber 2b are symmetrically arranged based on the first central reference line S1.
[0049] In other embodiments, the first compliance chamber 2a and the second compliance chamber 2b are symmetrically arranged based on the first central reference line S1; the first liquid storage chamber 3a and the second liquid storage chamber 3b are symmetrically arranged based on the first central reference line S1.
[0050] In other embodiments, the first pulsating chamber 1a and the second pulsating chamber 1b are symmetrically arranged based on the first central reference line S1; the first liquid storage chamber 3a and the second liquid storage chamber 3b are symmetrically arranged based on the first central reference line S1.
[0051] In some embodiments, the first pulsation chamber 1a and the second pulsation chamber 1b are symmetrically arranged based on the first central reference line S1; the first compliance chamber 2a and the second compliance chamber 2b are symmetrically arranged based on the first central reference line S1; and the first liquid storage chamber 3a and the second liquid storage chamber 3b are symmetrically arranged based on the first central reference line S1.
[0052] See Figure 2 and Figure 4 As shown, in one embodiment, the first pulsation chamber 1a and the second pulsation chamber 1b are symmetrically arranged based on the first central reference line S1, and the first compliance chamber 2a and the second compliance chamber 2b are also symmetrically arranged based on the first central reference line S1. This arrangement ensures that the lengths of the first connecting pipe 5a and the second connecting pipe 5b are equal. Furthermore, the first liquid storage chamber 3a and the second liquid storage chamber 3b are symmetrically arranged based on the first central reference line S1. This arrangement ensures that the lengths of the first connecting pipe 4a and the second connecting pipe 4b are equal, as are the lengths of the first connecting pipe 6a and the second connecting pipe 6b. This allows the second connecting pipe 5a and the second connecting pipe 5b to be selected using the same fittings, the first connecting pipe 4a and the second connecting pipe 4b to be selected using the same fittings, and the third connecting pipe 6a and the second connecting pipe 6b to be selected using the same fittings. Because the same fittings can be used, production complexity and production costs can be reduced.
[0053] For example, see Figure 1As shown, in the related technology, the first liquid storage chamber 03a, the first pulsating chamber 01a, the first compliant chamber 02a, the second liquid storage chamber 03b, the second pulsating chamber 01b, the second compliant chamber 02b, and the first liquid storage chamber 03a are connected sequentially, so that the entire circuit is arranged in a rectangular pattern. Specifically, a first connecting pipe 04a connects the first liquid storage chamber 03a and the first pulsating chamber 01a; a second connecting pipe 05a connects the first pulsating chamber 01a and the first compliant chamber 02a; a third connecting pipe 0b connects the first compliant chamber 02a and the second liquid storage chamber 03b; a second connecting pipe 04b connects the second liquid storage chamber 03b and the second pulsating chamber 01b; a second connecting pipe 05b connects the second pulsating chamber 01b and the second compliant chamber 02b; and a third connecting pipe 06a connects the second compliant chamber 02b and the first liquid storage chamber 03a. For the rectangular plane occupied by the loop, the length of the rectangular plane L01 = 1126.24 mm, the width of the rectangular plane L02 = 552.65 mm, and the area of the rectangular plane is 0.6224 m².
[0054] See Figure 4 As shown, the test device 100 according to an embodiment of this application adopts a first pulsation chamber 1a, a second pulsation chamber 1b, a first compliance chamber 2a, a second compliance chamber 2b, a first liquid storage chamber 3a, a second liquid storage chamber 3b with the same specifications and dimensions as in the related art, and a first connecting pipe 4a, a first connecting pipe 4b, a second connecting pipe 5a, a second connecting pipe 5b, a third connecting pipe 6a, and a third connecting pipe 6b with the same specifications and dimensions.
[0055] The first pulsation chamber 1a and the second pulsation chamber 1b are symmetrically arranged based on the first central reference line S1; the first compliance chamber 2a and the second compliance chamber 2b are symmetrically arranged based on the first central reference line S1; the first liquid storage chamber 3a and the second liquid storage chamber 3b are symmetrically arranged based on the first central reference line S1; the first pulsation chamber 1a and the first compliance chamber 2a are symmetrically arranged based on the second central reference line S2; and the second pulsation chamber 1b and the second compliance chamber 2b are symmetrically arranged based on the second central reference line S2. This layout results in a hexagonal shape for the loop formed by the first and second modules. The rectangular plane occupied by this loop has a length L1 = 740 mm, a width L2 = 620 mm, and an area of 0.4588 m².
[0056] Therefore, by comparing the loop layout of this example with the loop layout of related technologies, the planar area occupied by the loop layout of this example is reduced by 24%. Since the planar area occupied by the loop is effectively reduced, the overall size of the test equipment 100 can be effectively controlled, thereby reducing the overall size of the test equipment 100.
[0057] Combination Figure 2 and Figure 4 As shown, in some embodiments of this application, the compliance chamber 2 is equipped with a regulating valve 20. The regulating valve 20 can adjust the pressure of the compliance chamber 2, thereby inflating or deflating the compliance chamber 2 to regulate its pressure. The adjustable pressure of the compliance chamber 2 allows the testing equipment 100 to accurately simulate the dynamic pressure environment of the human circulatory system, ensuring that the biventricular assist device (BAVD) fully covers performance requirements under physiological, pathological, and extreme conditions during its research, development, verification, and optimization. This flexibility not only improves the clinical relevance of test results but also provides crucial support for the reliability, safety, and intelligent control of the BAVD.
[0058] Combination Figure 2 and Figure 4 As shown, in some embodiments of this application, a first connecting pipe 4 (i.e., first connecting pipe one 4a) connects the first reservoir 3a and the first pulsating chamber 1a, and a first connecting pipe 4 (i.e., first connecting pipe two 4b) connects the second reservoir 3b and the second pulsating chamber 1b. The first connecting pipe 4 includes a first main pipe 41 and a first one-way valve 42. The first one-way valve 42 is disposed in the first main pipe 41 and can control the flow of fluid in the first main pipe 41 from the reservoir 3 to the pulsating chamber 1 (i.e., from the first reservoir 3a to the first pulsating chamber 1a, and from the second reservoir 3b to the first pulsating chamber 1b). Since the first reservoir 3a can simulate the left atrium and the first pulsating chamber 1a can simulate the left ventricle in the test device 100, the first one-way valve 42 of the first connecting pipe one 4a simulates the mitral valve. The second reservoir 3b can simulate the right atrium, and the second pulsating chamber 1b can simulate the right ventricle, so that the first one-way valve 42 of the first connecting tube 4b simulates the tricuspid valve.
[0059] Combination Figures 2 to 4 As shown, in some embodiments of this application, a second connecting pipe 5 (i.e., second connecting pipe one 5a) is connected between the first pulsating chamber 1a and the first compliant chamber 2a, and a second connecting pipe 5 (i.e., second connecting pipe two 5b) is connected between the second pulsating chamber 1b and the second compliant chamber 2b.
[0060] The second connecting pipe 5 includes a main pipe 51 and a first branch pipe 52 and a second branch pipe 53 connected in parallel. One port of the main pipe 51 is connected to the compliance chamber 2, and the other port of the main pipe 51 is connected to one port of the first branch pipe 52 and the second branch pipe 53. The other end of the first branch pipe 52 is connected to the pulsating chamber 1, and the other port of the second branch pipe 53 is connected to the ventricular assist device in the pulsating chamber 1. The first branch pipe 52 is equipped with a second one-way valve 56, which can control the flow of fluid in the first branch pipe 52 from the pulsating chamber 1 to the main pipe 51. The second branch pipe 53 is equipped with a first flow sensor 54, which can detect the pumped fluid volume of the ventricular assist device in the pulsating chamber 1. The main pipe 51 is equipped with a second flow sensor 55, which can detect the flow rate of fluid flowing through the main pipe 51.
[0061] For example, in combination Figures 2 to 4 As shown, taking the first module as an example, since the left ventricular assist device is located in the first pulsating chamber 1a, and the inlet of the left ventricular assist device is connected to the first pulsating chamber 1a, the fluid flowing through the first pulsating chamber 1a flows into the interior of the left ventricular assist device through the inlet, and after flowing through the left ventricular assist device, the fluid is discharged through the outlet of the left ventricular assist device. The first branch pipe 52 is directly connected to the first pulsating chamber 1a, and the second branch pipe 53 is connected to the outlet of the left ventricular assist device.
[0062] During the process of fluid flowing from the first pulsating chamber 1a to the first compliant chamber 2a, two flow paths are formed on the side of the first pulsating chamber 1a. The two flow paths flow along the first branch pipe 52 and the second branch pipe 53 respectively. Since the first branch pipe 52 and the second branch pipe 53 are connected in parallel to the main pipe 51, the two flow paths converge in the main pipe 51, so that the fluid flows into the first compliant chamber 2a through the main pipe 51.
[0063] The first flow sensor 54 can more accurately detect the pumped fluid volume of the ventricular assist device (BAD). When the flow rate in the first flow sensor 54 is less than the flow rate in the second flow sensor 55, it indicates that no fluid is flowing back from the first compliance chamber 2a to the first pulsating chamber 1a; when the flow rate in the first flow sensor 54 is greater than the flow rate in the second flow sensor 55, it indicates that fluid is flowing back from the first compliance chamber 2a to the first pulsating chamber 1a. Therefore, by using the detection data from the first flow sensor 54 and the second flow sensor 55, the performance of the BAD under different physiological parameters in the presence of backflow can be tested, as can the performance of the BAD under different physiological parameters in the absence of backflow. Similarly, two flow sensors are also provided between the second pulsating chamber 1b and the second compliance chamber 2b.
[0064] It should also be noted that the second one-way valve 56 installed in the second connecting pipe 5a simulates the aortic valve in the test device 100; the second one-way valve 56 installed in the second connecting pipe 5b simulates the pulmonary valve in the test device 100.
[0065] Combination Figures 2 to 4 As shown, in some embodiments of this application, the first branch pipe 52 and the second branch pipe 53 have the same structure, and are collectively referred to as branch pipes below. Each branch pipe includes a straight pipe section 521 and a curved pipe section 522, with the curved pipe section 522 smoothly connected between the main pipe 51 and the straight pipe section 521. Compared to a bent branch pipe, in this application, due to the smooth transition of the curved pipe section 522, the fluid can naturally change its flow direction according to the curve's guidance when flowing through it, without sudden changes in direction. This maintains relative continuity and stability of the fluid's streamlines, greatly reducing the generation of vortices and turbulence. Therefore, during the fluid flow along the second connecting pipe 5, the resistance generated by the second connecting pipe 5 is small, thereby improving the testing accuracy of the testing equipment 100.
[0066] In some embodiments of this application, the radius of curvature of the curved pipe segment 522 is R, satisfying the relationship: 140mm ≤ R ≤ 150mm. For example, R can be 140mm, 142mm, 143mm, 144mm, 145mm, 146mm, 147mm, 148mm, 149mm, or 150mm. Because the transition of the curved pipe segment 522 is smooth, the fluid, when flowing through it, can naturally change its flow direction according to the curve's guidance, without sudden changes in direction. This maintains relative continuity and stability of the fluid's streamlines, greatly reducing the generation of vortices and turbulence. Therefore, during the fluid's flow along the second connecting pipe 5, the resistance exerted by the second connecting pipe 5 on the fluid is small, thereby improving the testing accuracy of the testing equipment 100. In one example of this application, the radius of curvature R of the curved pipe segment 522 is 145mm.
[0067] Combination Figures 2 to 4 As shown, in some embodiments of this application, when the second connecting pipe 5 is connected between the corresponding pulsation chamber 1 and compliance chamber 2, the first branch pipe 52 and the second branch pipe 53 are arranged along the height direction of the test equipment 100 so that the plane area occupied by the second connecting pipe 5 is small, thereby achieving the effect of reducing the plane area occupied by the circuit.
[0068] Combination Figure 2 and Figure 4As shown, in some embodiments of this application, a third connecting pipe 6 (i.e., third connecting pipe two 6b) is connected between the first compliant chamber 2a and the second liquid storage chamber 3b, and a third connecting pipe 6 (i.e., third connecting pipe one 6a) is connected between the second compliant chamber 2b and the first liquid storage chamber 3a. The third connecting pipe 6 includes a third main pipe 61 and a damper 62, which can adjust the flow resistance experienced by the fluid in the third main pipe 61.
[0069] See Figure 2 As shown, in some embodiments of this application, the test equipment 100 further includes a device base 7, on which both the first module and the second module are mounted and fixed. The device base 7 provides a solid support foundation for the entire test equipment 100, ensuring that the first module and the second module maintain a stable relative position and are not affected by external vibrations or displacements. Simultaneously, the device base 7 can also integrate other auxiliary functional components, such as heat dissipation structures and electrical connection interfaces, further improving the overall performance and practicality of the test equipment 100 and providing comprehensive protection for the reliable operation of the test equipment 100.
[0070] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0071] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.
Claims
1. A test apparatus (100), characterized in that The application relates to a simulation device for a heart assist device, which comprises: a first module and a second module; the simulation chambers of the first module and the second module each comprise a pulsation chamber (1), a compliance chamber (2) and a liquid storage chamber (3), and the simulation chambers of the two modules are arranged on the two sides of a first central reference line (S1) respectively; wherein the first central reference line (S1) is perpendicular to a second central reference line (S2); the pulsation chamber (1) and the compliance chamber (2) of the same module are arranged on the two sides of the second central reference line (S2) respectively, and the liquid storage chamber (3) is arranged between the pulsation chamber (1) and the compliance chamber (2) along the extension direction of the first central reference line (S1); the communication pipes of the first module and the second module each comprise a first communication pipe (4), a second communication pipe (5) and a third communication pipe (6); the liquid storage chamber (3) and the pulsation chamber (1) in the same module are communicated through the first communication pipe (4), the pulsation chamber (1) and the compliance chamber (2) in the same module are communicated through the second communication pipe (5), and the liquid storage chamber (3) and the compliance chamber (2) in different modules are communicated through the third communication pipe (6); wherein the third communication pipes (6) in the two modules are arranged in a cross-laminated mode.
2. The test device (100) according to claim 1, characterized in that the second communication pipe (5) and the third communication pipe (6) in the same module are arranged in a cross-laminated mode.
3. The test device (100) according to claim 1, characterized in that At least two of the following features are satisfied: the pulsation chamber (1) of the first module and the pulsation chamber (1) of the second module are arranged symmetrically based on the first central reference line (S1); the compliance chamber (2) of the first module and the compliance chamber (2) of the second module are arranged symmetrically based on the first central reference line (S1); the liquid storage chamber (3) of the first module and the liquid storage chamber (3) of the second module are arranged symmetrically based on the first central reference line (S1).
4. The test device (100) according to claim 1, characterized in that the compliance chamber (2) is provided with an adjusting valve (20), and the adjusting valve (20) can adjust the pressure of the compliance chamber (2).
5. The test device (100) according to any one of claims 1 to 4, characterized in that the first communication pipe (4) comprises a first main pipe (41) and a first one-way valve (42), the first one-way valve (42) is arranged in the first main pipe (41), and the first one-way valve (42) can control the fluid in the first main pipe (41) to flow from the liquid storage chamber (3) to the pulsation chamber (1).
6. The test device (100) according to claim 1, characterized in that the second communication pipe (5) comprises a main pipe (51) and parallelly connected first and second branch pipes (52 and 53), one end of the main pipe (51) is communicated with the compliance chamber (2), the other end of the main pipe (51) is connected with one end of the first and second branch pipes (52 and 53), the other end of the first branch pipe (52) is connected with the pulsation chamber (1), and the other end of the second branch pipe (53) is connected with a heart assist device in the pulsation chamber (1). The first branch pipe (52) is provided with a second one-way valve (56) capable of controlling the fluid in the first branch pipe (52) to flow from the pulsatile chamber (1) to the main pipe (51); the second branch pipe (53) is provided with a first flow sensor (54) capable of detecting the pump-out volume of the ventricular assist device; and the main pipe (51) is provided with a second flow sensor (55) capable of detecting the fluid flow through the main pipe (51).
7. The test device (100) according to claim 6, characterized in that The first branch pipe (52) and the second branch pipe (53) each comprise a straight pipe section (521) and a curved pipe section (522), and the curved pipe section (522) is smoothly connected between the straight pipe section (521) and the main pipe (51).
8. The test device (100) according to claim 7, characterized in that The curvature radius of the curved pipe section (522) is R, and the relationship is 140mm≤R≤150mm.
9. The test device (100) according to any one of claims 6 to 8, characterized in that The first branch pipe (52) and the second branch pipe (53) are arranged along a height direction. The height direction is perpendicular to the first center reference line (S1) and the second center reference line (S2).
10. The test device (100) according to claim 1, characterized in that The third communication pipe (6) comprises a third main pipe (61) and a damper (62), and the damper (62) is capable of adjusting the flow resistance suffered by the fluid in the third main pipe (61).