Vascular mechanical property experimental device

Abstract

The utility model relates to a vascular mechanical property experimental device. Comprising a rack, a liquid storage tank, an axial telescopic bag body, an electric telescopic rod, a blood vessel test piece, a diameter measuring instrument, a plug and a laser distance measuring sensor, a liquid storage tank is arranged at the top of the rack, an axial telescopic bag body is arranged in the middle of the rack, and the axial telescopic bag body is connected with the liquid storage tank; an electric telescopic rod is arranged above the axial telescopic bag body, a liquid outlet pipe is arranged at the bottom of the axial telescopic bag body, and a water pressure sensor is arranged on the liquid outlet pipe; the lower end of the liquid outlet pipe is sleeved with the upper end of a blood vessel test piece, a plug is arranged at the other end of the blood vessel test piece, and a laser ranging sensor is arranged below the plug; and a diameter measuring instrument is arranged on the rack. Normal saline is injected into the blood vessel test piece, then the pressure intensity in the blood vessel test piece is increased through the axial telescopic bag body, the blood vessel test piece is expanded or pressurized to the physiological state, then the diameter and length of the blood vessel test piece in the physiological state are measured through the diameter measuring instrument and the laser distance measuring sensor respectively, operation is convenient, and data are accurate.

Description

Technical Field

[0001] This application relates to the technical field of mechanical property experiments, and particularly to a device for vascular mechanical property experiments. Background Art

[0002] When calculating the elastic modulus of a blood vessel, it is necessary to know the circumference and length of the blood vessel. Currently, the method of dissecting and stretching the blood vessel and then measuring it specifically is mostly used. When operating this method, first, due to the small diameter of the blood vessel, it is inconvenient to dissect the blood vessel; second, the width of the dissected blood vessel is small, making it inconvenient to stretch; third, it is difficult to control the stretching length, making it impossible to ensure that the blood vessel has been stretched to the physiological state during measurement. Therefore, the measured circumference of the blood vessel is not accurate enough, affecting the accuracy of the calculation results. Summary of the Invention

[0003] To solve or partially solve the problems existing in the related art, this application provides a device for vascular mechanical property experiments, aiming to solve the problems of measuring the circumference and length of a blood vessel when the blood vessel is stretched to the physiological state.

[0004] Based on the above technical problems, this application provides a device for vascular mechanical property experiments, including a frame, a liquid storage tank, an axially telescopic bladder, an electric telescopic rod, a blood vessel specimen, a diameter gauge, a plug, and a laser distance sensor;

[0005] The liquid storage tank is provided at the top of the frame, the axially telescopic bladder is provided in the middle of the frame, the axially telescopic bladder is connected to the liquid storage tank through a liquid guide pipe, and a valve is provided on the liquid guide pipe; an electric telescopic rod for squeezing the axially telescopic bladder to deform it is provided above the axially telescopic bladder, a liquid outlet pipe is provided at the bottom of the axially telescopic bladder, and a water pressure sensor is provided on the liquid outlet pipe; the lower end of the liquid outlet pipe is sleeved with the upper end of the blood vessel specimen, a plug is provided at the other end of the blood vessel specimen, and a laser distance sensor for detecting the height where the plug is located is provided below the plug; a diameter gauge for detecting the diameter of the blood vessel specimen is provided on the frame; the electric telescopic rod, the water pressure sensor, the laser distance sensor, and the diameter gauge are respectively electrically connected to a controller.

[0006] In some solutions, a signal control system is further included, the valve is an electromagnetic valve, and the signal control system is respectively connected to the controller and a display screen.

[0007] In some solutions, the frame includes a base, a vertical support portion, a first horizontal support portion, and a second horizontal support portion; the vertical support portion is fixedly installed on the base, and the first horizontal support portion and the second horizontal support portion are successively arranged on the vertical support portion from top to bottom; the liquid storage tank is arranged on the first horizontal support portion, the electric telescopic rod is fixedly installed on the bottom surface of the first horizontal support portion, the axial expansion and contraction capsule is fixedly installed on the second horizontal support portion, the water pressure sensor is fixedly installed on the bottom surface of the second horizontal support portion, the liquid outlet pipe penetrates through the second horizontal support portion and is connected to the water pressure sensor, an installation groove is formed on the base, the laser distance sensor is arranged in the installation groove, and a transparent end cover is covered on the installation groove.

[0008] In some solutions, the side wall of the axial expansion and contraction capsule is corrugated.

[0009] In some solutions, an air release valve is arranged at the top of the axial expansion and contraction capsule.

[0010] The technical solutions provided in this application may include the following beneficial effects:

[0011] In this application, by injecting clean water or physiological simulation liquid into the blood vessel specimen, then increasing the pressure inside the blood vessel specimen through the axial expansion and contraction capsule, so that the blood vessel specimen is stretched to the physiological state, and then measuring the diameter and length of the blood vessel specimen in the physiological state through the diameter measuring instrument and the laser distance sensor respectively, the operation is convenient and the data is accurate.

[0012] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] By describing the exemplary embodiments of the present application in more detail in conjunction with the drawings, the above and other objects, features, and advantages of the present application will become more obvious. Among them, in the exemplary embodiments of the present application, the same reference numerals generally represent the same components.

[0014] Figure 1 is a schematic structural diagram of a blood vessel mechanical property experiment device shown in an embodiment of the present application;

[0015] Figure 2 is a control flow chart of a blood vessel mechanical property experiment device shown in an embodiment of the present application;

[0016] Reference numerals:

[0017] 1. Frame; 101. Base; 102. Vertical support part; 103. First horizontal support part; 104. Second horizontal support part; 105. Installation groove; 2. Liquid storage tank; 3. Axial expansion bladder; 4. Electric telescopic rod; 5. Blood vessel specimen; 6. Diameter measuring instrument; 7. Plug; 8. Laser distance measuring sensor; 9. Valve; 10. Liquid guide pipe; 11. Water pressure sensor; 12. Controller; 13. Signal control system; 14. Display screen; 15. Air release valve. Detailed implementation mode

[0018] The embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present application more thorough and complete, and to be able to fully convey the scope of the present application to those skilled in the art.

[0019] It should be understood that although the terms "first", "second", "third", etc. may be used in the present application to describe various information, these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present application, the meaning of "a plurality" is two or more unless otherwise specifically defined.

[0020] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0021] Unless otherwise clearly defined and limited, the terms "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0022] Embodiment 1:

[0023] Please refer to Figure 1 Figure 2 , this application provides an experimental device for vascular mechanical properties. The experimental device for vascular mechanical properties includes a frame 1, a liquid storage tank 2, an axially telescopic bladder 3, an electric telescopic rod 4, a vascular specimen 5, a diameter gauge 6, a plug 7, and a laser distance sensor 8;

[0024] The liquid storage tank 2 is provided at the top of the frame 1. The liquid storage tank 2 is filled with physiological saline. The axially telescopic bladder 3 is provided in the middle of the frame 1. The axially telescopic bladder 3 is connected to the liquid storage tank 2 through a liquid guide pipe, so that the water in the liquid storage tank 2 is introduced into the axially telescopic bladder 3 through the liquid guide pipe. A valve 9 is provided on the liquid guide pipe 10 to control the on-off of the liquid guide pipe. Specifically, the liquid guide pipe 10 includes a rigid pipe section and a flexible pipe section, and the valve 9 is installed on the rigid pipe section; An electric telescopic rod 4 for squeezing the axially telescopic bladder 3 to deform it is provided above the axially telescopic bladder 3. An outlet pipe is provided at the bottom of the axially telescopic bladder 3, and a water pressure sensor 11 is provided on the outlet pipe; The lower end of the outlet pipe is sleeved with the upper end of the vascular specimen 5. A plug 7 is provided at the other end of the vascular specimen 5, and a laser distance sensor 8 for detecting the height where the plug 7 is located is provided below the plug 7; A diameter gauge 6 for detecting the diameter of the vascular specimen 5 is provided on the frame 1; The electric telescopic rod 4, the water pressure sensor 11, the laser distance sensor 8, and the diameter gauge 6 are respectively electrically connected to a controller 12.

[0025] When in use, the following steps are carried out for operation:

[0026] 1. Open the valve 9 to allow the water in the liquid storage tank 2 to flow into the axially telescopic bladder 3 and the vascular specimen 5 through the liquid guide pipe, and at least fill two-thirds of the axially telescopic bladder 3, and then close the valve 9;

[0027] 2. The controller 12 powers on and starts the electric telescopic rod 4, which extends downward to squeeze the axially telescopic bladder 3, so that the liquid in the axially telescopic bladder 3 flows into the vascular specimen 5 from the outlet pipe, thereby causing the vascular specimen 5 to expand, elongate, and increasing the pressure on the vascular specimen 5; At the same time, the diameter gauge 6 detects the diameter of the vascular specimen 5 in real time and transmits it to the controller 12; The laser distance sensor 8 detects the position height of the plug 7 in real time and transmits it to the controller 12, so as to obtain the length change of the vascular specimen 5; The water pressure sensor 11 detects the internal pressure of the vascular specimen 5 in real time and transmits it to the controller 12;

[0028] 3. When the pressure applied to the blood vessel specimen 5 reaches the set pressure, the controller 12 controls the electric telescopic rod 4 to stop moving. At this time, the diameter of the blood vessel specimen 5 measured by the diameter gauge 6 is the diameter of the blood vessel specimen 5 under physiological conditions. Through simple calculation, the circumference of the blood vessel specimen 5 under physiological conditions can be obtained. The operation is simple and the measurement data is accurate.

[0029] Optionally, in this embodiment, the blood vessel mechanical property experimental device further includes a signal control system 13. The valve 9 is an electromagnetic valve. The signal control system 13 is respectively connected to the controller 12 and the display screen 14. The signal control system 13 is installed in a computer mainframe. The signal control system 13 transmits the collected relevant data to the display screen 14 for display and performs relevant calculations.

[0030] Specifically, the outer diameter of the blood vessel measured by the diameter gauge 6 is recorded as D, the length of the blood vessel specimen indirectly measured by the laser distance sensor 8 is recorded as L (when the position of the liquid outlet pipe is fixed, the distance between the liquid outlet pipe and the laser distance sensor 8 can be known in advance, then L is the distance between the liquid outlet pipe and the laser distance sensor 8 minus the value monitored by the laser distance sensor 8). The pressure inside the blood vessel specimen 5 measured by the water pressure sensor 11 is recorded as P. When the electric telescopic rod 4 extends and squeezes the axial expansion bladder 3, the internal pressure of the blood vessel specimen 5 increases by ΔP, the outer diameter of the blood vessel specimen 5 increases by ΔD, and the length change of the blood vessel specimen is Δl. This step can be repeated. According to the size parameters of the blood vessel specimen 512 and the measured parameters ΔP, ΔD, Δl, the circumferential and axial elastic moduli E of the blood vessel specimen 512 can be calculated.

[0031] Furthermore, considering that the mechanical properties of the blood vessel are related to the loading history, the load can also be a cyclic load (such as sinusoidal wave loading). At this time, it is achieved by adjusting the electric telescopic rod 4.

[0032] At the same time, this embodiment can also perform the compliance test of the blood vessel specimen 5 (the change in the volume of this section of the blood vessel when the pressure inside the blood vessel changes by one unit), the expansion pressure limit test for destructive experiments, and measure the strength limit of the blood vessel specimen, etc. The application range is wide.

[0033] Embodiment 2:

[0034] Based on Embodiment 1, as Figure 1As shown, in this embodiment, the frame 1 includes a base 101, a vertical support portion 102, a first horizontal support portion 103, and a second horizontal support portion 104; the vertical support portion 102 is fixedly installed on the base 101, and the first horizontal support portion 103 and the second horizontal support portion 104 are successively arranged on the vertical support portion 102 from top to bottom; the liquid storage tank 2 is arranged on the first horizontal support portion 103, the electric telescopic rod 4 is fixedly installed on the bottom surface of the first horizontal support portion 103, the axial expansion and contraction bladder 3 is fixedly installed on the second horizontal support portion 104, the water pressure sensor 11 is fixedly installed on the bottom surface of the second horizontal support portion 104, and the liquid outlet pipe penetrates through the second horizontal support portion 104 and is connected to the water pressure sensor 11.

[0035] An installation groove 105 is formed on the base 101, the laser distance sensor 8 is arranged in the installation groove 105, and a transparent end cover is covered on the installation groove 105, so as to effectively protect the laser distance sensor 8 while not affecting the operation of the laser distance sensor 8, and effectively avoid the technical problem that when the blood vessel specimen 5 is disassembled, the remaining physiological saline in the axial expansion and contraction bladder 3 drips onto the laser distance sensor 8, resulting in damage to the laser distance sensor 8.

[0036] Embodiment 3:

[0037] Based on any of the above embodiments, as Figure 1 shown, in this implementation, the axial expansion and contraction bladder 3 is integrally cylindrical, the axial expansion and contraction bladder 3 is made of plastic material, and the side wall of the axial expansion and contraction bladder 3 is corrugated. The axial expansion and contraction bladder 3 has a certain elastic reset ability, which is beneficial to ensuring the smooth progress of the next test process. At the same time, the axial expansion and contraction bladder 3 can be compressed radially, and there will be no obvious expansion in the circumferential direction during compression.

[0038] The axial expansion and contraction bladder 3 can also be made of a metal material with good elasticity and toughness.

[0039] Optionally, in this embodiment, an air release valve 15 is provided at the top of the axial expansion and contraction bladder 3. When starting to inject physiological saline into the axial expansion and contraction bladder 3, the air release valve 15 can be opened to discharge the air in the axial expansion and contraction bladder 3, which is beneficial to the smooth inflow of physiological saline into the axial expansion and contraction bladder 3.

[0040] The embodiments of the present application have been described above. The above description is exemplary and not exhaustive, and is also not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The choice of terms used herein is intended to best explain the principles of the embodiments, the practical application, or the improvement of the technology in the market, or to enable other ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A vascular mechanical properties experimental device, characterized in that: It includes a frame, a liquid storage tank, an axial telescopic capsule, an electric telescopic rod, a blood vessel test piece, a caliper, a plug, and a laser distance sensor; The liquid storage tank is provided on the top of the frame, the axial telescopic bag is provided in the middle of the frame, the axial telescopic bag is connected to the liquid storage tank through a liquid guide tube, and the liquid guide tube is provided with a valve; an electric telescopic rod for squeezing the axial telescopic bag to deform it is provided above the axial telescopic bag, a liquid outlet pipe is provided at the bottom of the axial telescopic bag, and a water pressure sensor is provided on the liquid outlet pipe; the lower end of the liquid outlet pipe is sleeved with the upper end of the vascular specimen, and a plug is provided at the other end of the vascular specimen, and a laser distance measuring sensor for detecting the height of the plug is provided below the plug; a caliper for detecting the diameter of the vascular specimen is provided on the frame; the electric telescopic rod, the water pressure sensor, the laser distance measuring sensor, and the caliper are electrically connected to the controller respectively.

2. A blood vessel mechanical properties experimental device according to claim 1, characterized in that: It also includes a signal control system, the valve adopts a solenoid valve, and the signal control system is connected to the controller and the display screen respectively.

3. A blood vessel mechanical properties experimental device according to claim 1, characterized in that: The frame includes a base, a vertical support part, a first horizontal support part, and a second horizontal support part; the vertical support part is fixedly installed on the base, and the vertical support part is provided with a first horizontal support part and a second horizontal support part in sequence from top to bottom; the liquid storage tank is arranged on the first horizontal support part, the electric telescopic rod is fixedly installed on the bottom surface of the first horizontal support part, the axial telescopic bag is fixedly installed on the second horizontal support part, the water pressure sensor is fixedly installed on the bottom surface of the second horizontal support part, the liquid outlet pipe passes through the second horizontal support part and is connected to the water pressure sensor, an installation groove is constructed on the base, the laser ranging sensor is arranged in the installation groove, and a transparent end cover is provided on the installation groove.

4. A blood vessel mechanical properties experimental device according to claim 1, characterized in that: The side wall of the axial telescopic bag is corrugated.

5. A blood vessel mechanical properties experimental device according to claim 4, characterized in that: A deflation valve is arranged on the top of the axial telescopic bag.

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