CN102670240B - A kind of blood flow simulator - Google Patents

Abstract

The embodiment of the present invention discloses a blood flow simulation device, which includes: a frame; a low-level fluid tank filled with blood simulation liquid; Moving, the high-level fluid tank is provided with a first opening, a second opening and a discharge channel; a pump, including an input port and an output port; a fluid upward pipeline, one end is connected to the output port of the pump, and the other end is connected to the high-level fluid tank The first opening; a simulated blood flow pipeline, one end is connected to the second opening of the upper fluid tank, and the other end extends into the lower fluid tank. In the present invention, the simulated blood liquid is pumped into the high-level fluid tank through a pump, and then flows into the low-level fluid tank through the simulated blood flow pipeline under the action of gravity to form a simulated blood flow. By controlling the height of the high-level fluid tank, various flow rates can be obtained. Simulate blood flow.

Description

A blood flow simulation device

technical field

The invention relates to the field of color ultrasonic imaging, in particular to a device for providing simulated blood flow for color ultrasonic imaging equipment.

Background technique

Color ultrasound imaging equipment can be used to detect the velocity of blood flow in the scanned target tissue. Usually, before using it, people need to know performance parameters such as accuracy of blood flow velocity detection, detection range of blood flow velocity, and/or ability to detect ultra-low blood flow velocity of color ultrasound imaging equipment. Therefore, it is necessary to provide a blood flow simulation device, which provides a simulated blood flow within a certain speed range, and uses a color ultrasonic imaging device to scan and image the simulated blood flow, so as to determine the effect of the color ultrasonic imaging device on the blood flow. Performance when scanning probes.

Contents of the invention

Embodiments of the present invention provide a blood flow simulation device that can provide simulated blood flow in a wide range of flow velocity, is convenient to adjust the flow velocity of the simulated blood flow, and can provide simulated blood flow at low flow velocity.

The technical solutions disclosed in the embodiments of the present invention include:

A blood flow simulation device is provided, which is characterized in that it includes: a frame; a low fluid tank containing blood simulation liquid; a high fluid tank connected to the machine through a connecting device on the frame, and can move up and down along the frame, the high-level fluid tank is provided with a first opening, a second opening and a discharge channel, and the position of the discharge channel is higher than the first opening and a second opening; a pump, the pump includes an input port and an output port; a pump input line, one end of the pump input line is connected to the input port, and the other end extends into the blood simulation liquid in the low-level fluid tank ; Fluid upward pipeline, one end of the fluid upward pipeline is connected to the output port of the pump, and the other end is connected to the first opening of the high-level fluid tank; simulated blood flow pipeline, one end of the simulated blood flow pipeline It is connected to the second opening of the high-level fluid tank, and the other end extends into the low-level fluid tank.

The embodiment of the present invention also provides a blood flow simulation device, which is characterized in that it includes: a frame; a lower fluid tank containing simulated blood liquid; a higher fluid tank connected to the The frame is provided with a first opening and a second opening; a pump, the pump includes an input port and an output port; a pump input pipeline, one end of the pump input pipeline is connected to the input port, and the other end extends Into the blood simulated liquid in the low-level fluid tank; the fluid uplink pipeline, one end of the fluid uplink pipeline is connected to the output port of the pump, and the other end is connected to the first opening of the high-level fluid tank; simulated blood flow pipeline, one end of the simulated blood flow pipeline is connected to the second opening of the high-level fluid tank, and the other end extends into the low-level fluid tank; the simulated blood flow pipeline bracket is connected to the simulated blood flow pipeline bracket The device is connected to a vertical support or the frame, and can move up and down along the frame, at least part of the simulated blood flow pipeline is supported on the simulated blood flow pipeline support; The simulated blood flow pipeline bracket is the detection position of the simulated blood flow.

In the embodiment of the present invention, the simulated blood liquid is pumped into the high-level fluid tank through a pump, and then flows into the low-level fluid tank through the simulated blood flow pipeline under the action of gravity to form a simulated blood flow. It is determined by the height difference between the liquid level of the high-level fluid tank and the detection position. By adjusting the height of the high-level fluid tank or the detection position, the height difference between the liquid level of the blood simulation liquid in the high-level fluid tank and the detection position can be adjusted, so that various flow rates can be obtained. Simulate blood flow. The blood flow simulation device of the embodiment of the present invention is easy to adjust, has a large adjustment range, and can obtain a simulated blood flow with a very low flow rate, the minimum flow rate being zero.

Description of drawings

FIG. 1 is a schematic diagram of a blood flow simulation device according to an embodiment of the present invention;

2 is a schematic diagram of a blood flow simulation device according to another embodiment of the present invention;

Detailed ways

As shown in FIG. 1 , it is a schematic diagram of a blood flow simulation device according to an embodiment of the present invention. In this embodiment, the blood flow simulation device includes a frame 5, a lower fluid tank 2, a higher fluid tank 8, a pump 3, a fluid upstream pipeline 6, a simulated blood flow pipeline 4, a discharge pipeline 9, and a simulated blood flow tube. Road support 11, pump input pipeline 12.

The lower fluid tank 2 is filled with simulated blood liquid, which serves as simulated blood. The high-level fluid tank 8 is connected and supported on the frame 5 through the connecting device 7, and the connecting device 7 can move from low to high or from high to low relative to the frame 5 (that is, move up and down), so that the high-level fluid tank 8 can be After moving up and down (up and down) relative to the frame 5 and moving to a desired position, the connecting device 7 can be fixed relative to the base frame 5 to support the high-level fluid tank 8 .

The connecting device 7 can be a slide rail-slider structure with a stop mechanism, a slide block is set on the high-level fluid tank 8, a slide rail is set on the frame 5, the slide block is slidably matched with the slide rail, and the stop mechanism can be provided On the high-level fluid tank 8 or the frame 5, it can be a stop structure that can be used in the slide rail-slider structure commonly used in the industry. When the slide block and the slide rail slide to the desired position, the slide block and the slide rail Stop the relative movement and support the elevated fluid tank 8 . For example, it can be a friction plate arranged on the high-level fluid tank 8 or the frame 5, and the friction plate can be in contact with the slide rail or the slider. Or the slider, so that the friction plate is pressed against the slide rail or the slider, so that the slide rail and the slider stop relative movement and hold each other. The force-applying part can be a bolt that is threadedly connected to the high-level fluid tank 8 or the frame 5, and its front end can be in contact with the friction plate. Turning the bolt can make the bolt and the friction plate be pressed tightly so as to provide the friction plate. The force against the rail or slider.

In another embodiment of the present invention, the connection device 7 may also be a gear-rack structure with a stop mechanism. For example, a gear is set on the high-level fluid tank 8, the gear is connected to the high-level fluid tank 8 through a rotating shaft, and a rack is set on the frame 5 correspondingly, the rack is fixedly connected with the frame 5, and the gear is connected to the rack 5. engage. Rotating the gear can drive the high-level fluid tank 8 to move up and down relative to the rack (that is, relative to the frame 5). Rotating the gear can be achieved by setting a handle on the gear, and the user holds the handle and manually turns the gear; it can also be achieved by setting a motor on the high-level fluid tank 8, and the gear is fixedly connected to the output shaft of the motor, or through the gear The output shaft of the electrode is connected to the output shaft of the electrode through transmission, belt transmission, etc., so that the gear is driven by the motor to rotate. Its stopping mechanism can be the friction plate and the force application member that are arranged on the high-level fluid tank 8 or the frame 5 similar to the stopping mechanism in the previous embodiment. When the gear drives the high-level fluid tank 8 to the desired position, The friction plate is pressed against the frame 5 or the high-level fluid tank 8 through the force-applying member, so that the high-level fluid tank 8 stops moving and is fixed with the frame 5 . Those skilled in the art can understand that the stopping mechanism can also be other types of applicable stopping or braking structures. In various embodiments of the present invention, the gear may be a single gear or a gear set.

The pump 3 includes an input port and an output port. The high-level fluid tank 8 includes a bottom wall and a side wall extending upward from the periphery of the bottom wall, and a first opening is provided on the bottom wall. One end of the fluid uplink pipeline 6 is connected to the output port of the pump 3; spatial connectivity. The input port of the pump 3 is connected with the pump input pipeline 12 . The pump input pipeline 12 extends into the simulated blood in the lower fluid tank 2 . When the pump 3 is working, it pumps the simulated blood liquid in the lower fluid tank 2 from the pump input line 12 to the upward fluid pipeline 6 , and drives the simulated blood fluid along the upward fluid pipeline 6 to the upper fluid tank 8 . The pump 3 can be installed in the lower fluid tank 2 , or can be separated from the lower fluid tank 2 , as long as the pump input line 12 extends into the simulated blood in the lower fluid tank 2 .

A second opening is also provided on the bottom wall of the elevated fluid tank 8 . One end of the simulated blood flow pipeline 4 is connected to the second opening of the high-level fluid tank 8, and its hollow cavity communicates with the accommodation space of the high-level fluid tank 8. The other end of the simulated blood flow pipeline 4 passes through the detection position K and then extends into the In the simulated blood liquid in the lower fluid tank 2 , the probe 1 of the color ultrasonic imaging device scans and detects the simulated blood flow pipeline 4 at the detection position K. A simulated blood flow line support 11 can be set at the detection position K, and when the simulated blood flow line 4 passes through the detection position K, at least part of the simulated blood flow line can be supported on the simulated blood flow line support 11, It is convenient for the probe 1 to scan it, and it is convenient for determining the distance between the detection position K and the liquid level in the high-level fluid tank (details will be described later).

A third opening is provided on the side wall of the high-level fluid tank 8, and the position of the third opening is higher than the aforementioned first opening and the second opening. One end of the drain pipeline 9 is connected to the third opening, and the other end extends into the lower position. in the fluid tank. When the liquid level of the simulated blood in the upper fluid tank 8 rises and reaches the third opening, the simulated blood can overflow from the third opening and flow into the lower fluid tank 2 through the drain line 9 .

When working, the pump 3 pumps the blood simulated liquid in the lower fluid tank 2 into the upper fluid tank 8, and the blood simulated liquid pumped into the upper fluid tank 8 flows out through the simulated blood flow pipeline 4 under the action of its gravity , passing through the detection position K, a simulated blood flow with a certain speed is formed at the detection position K. Assume that the height difference between a certain point in the simulated blood flow pipeline 4 (take the point at the detection position K as an example) to the liquid level in the high-level fluid tank 8 is h (as shown in Figure 1), and the simulated blood flow at K The instantaneous flow velocity is v, the mass of the simulated blood flow is m, and the acceleration of gravity is g, then according to the potential energy-kinetic energy conversion formula:

$\frac{{\mathrm{<span\; class="notranslate">\; mv</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}}{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; mgh</span>}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; )</span>$

have to:

$\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; =</span>\sqrt{\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; gh</span>}}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 2</span>}<span\; class="notranslate">\; )</span>$

In the formula (2), the gravitational acceleration g is a constant. It can be seen that the flow velocity of the simulated blood flow at a certain point in the simulated blood flow pipeline 4 is only related to the height difference between the point and the liquid level of the high-level fluid tank 8, and the height is determined difference, the blood flow velocity at this point can be determined, and a simulated blood flow with a specific flow velocity can be obtained.

In order to obtain a simulated blood flow with a stable flow rate, it is necessary to obtain a stable height difference between the liquid level and the detection position. Firstly, the liquid level in the high-level fluid tank 8 can be kept constant relative to the high-level fluid tank. In this embodiment, the upward flow rate in the fluid upward line 6 can be made greater than the downward flow rate in the simulated blood flow line 4 , so that the liquid level in the high-level fluid tank 8 can gradually rise. To make the upward flow in the fluid upstream pipeline 6 greater than the downstream flow in the simulated blood flow pipeline 4 can be achieved by making the cross-sectional area of the fluid upstream pipeline 6 larger than the cross-sectional area of the simulated blood flow pipeline 4, or by adjusting the power of the pump to make the fluid go upward The flow velocity in the pipeline 6 is greater than the flow velocity in the simulated blood flow pipeline 4 and other ways.

When the liquid level rises to the third opening, the blood flow simulating liquid in the high-level fluid tank 8 overflows from the discharge pipeline 9 and returns to the low-level fluid tank 2 . At this time, the upward flow rate in the fluid upstream pipeline 6 is equal to the sum of the flow rates of the simulated blood flow pipeline 4 and the discharge pipeline 9, and the inflow and outflow of fluid in the high-level fluid tank 8 are in a balanced state. Therefore, at this time The liquid level can remain unchanged relative to the high-level fluid tank 8 . At this time, the height of the liquid surface can be determined by obtaining the height of the high-level fluid tank 8 . When the position of the high-level fluid tank 8 remained constant, the height of the liquid level also remained constant. At this time, the detection position (such as detection position K) was kept constant, and the height difference between the liquid level and the detection position also remained constant. In order to obtain a simulated blood flow with a stable flow rate at the detection position.

As mentioned above, in the embodiment of the present invention, the high-level fluid tank 8 can move relative to the frame 5 in the direction of height (up and down). Therefore, the height of the high-level fluid tank 8 can be adjusted, that is, the height of the liquid level in the high-level fluid tank 8 can be adjusted. By adjusting the height of the high-level fluid tank 8, the height difference between the liquid level and the detection position can be adjusted, thereby adjusting the flow velocity of the simulated blood flow at the detection position. It can be seen from the above formula (2) that when the expected simulated blood flow velocity at the detection position is v:

$\mathrm{<span\; class="notranslate">\; h</span>}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; v</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}}{\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; g</span>}}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 3</span>}<span\; class="notranslate">\; )</span>$

At this time, adjust the position of the high-level fluid tank 8 so that the height difference between the liquid level and the detection position is the value of h calculated according to the above formula, and a simulated blood flow with a desired flow rate can be obtained at the detection position. In the embodiment of the present invention, simulated blood flow with a large flow rate range can be provided, and the flow rate range of the simulated blood flow that can be provided is determined by the adjustable range of h, the lowest can be 0, and the highest flow rate can be determined by the high-level fluid tank 8 The highest reachable height on the rack 5 is defined. This range can be set according to actual needs.

In one embodiment of the present invention, a scale can be arranged on the frame 5, and the scale of the scale can be the height of the high-level fluid tank 8 relative to the ground, or the height difference between the liquid level of the high-level fluid tank 8 and the detection position, It may also directly be the flow velocity of the simulated blood flow at the detection position corresponding to when the high-level fluid tank 8 is located at the current position. In this way, it is convenient for the user to adjust the position of the high-level fluid tank to obtain the simulated blood flow at the desired flow rate.

In the foregoing embodiments, the high-level fluid tank 8 is connected to the frame 5 through the connection device 7 so as to be movable up and down. In another embodiment of the present invention, the high-level fluid tank 8 is fixed on the frame 5, and the simulated blood flow pipeline bracket 11 is connected to the frame 5 through a connecting device and can move up and down along the frame 5 Since the simulated blood flow pipeline is supported by the simulated blood flow pipeline support 11 to form a detection position, the detection position can move up and down along the frame 5, so that the detection position and the position in the high-level fluid tank 8 can be adjusted. The height difference of the liquid level is adjusted to achieve the purpose of adjusting the flow velocity of the simulated blood flow at the detection position. The simulated blood flow pipeline support 11 can be connected to the frame 5, or can be connected to another specially set vertical support, and the vertical support can also be provided with the scale on the frame 5 in the previous embodiment. A scale similar to a ruler.

In this embodiment, the connection device that simulates the blood flow line support 11 and the frame 5 or the vertical support can be the same structure as the connection device 7 in the previous embodiment (for example, it is arranged on the simulated blood flow line support 11 With the frame 5 or the slide block-sliding rail structure or the gear-rack structure with stop mechanism on the vertical support), repeat them here.

As shown in Figure 2, it is another embodiment of the present invention. In this embodiment, the high-level fluid tank 8 includes a partition 10, and the high-level fluid tank 8 is divided into an energy storage area 13 and a discharge area 14 by the partition plate 10. The first opening and the second opening are arranged in the energy storage area 13, The fluid upstream pipeline 6 and the simulated blood flow pipeline 4 are respectively connected to the energy storage area 13 through the first opening and the second opening; the third opening is arranged in the discharge area 14, and the discharge pipeline 9 is connected through the third opening To the drain area 14, that is, the first and second openings are located on one side of the partition 10, and the third opening of the partition 10 is on the other side opposite to the first opening and the second opening. The height of the partition 10 is smaller than the height of the peripheral side wall of the high-level fluid groove 8 . After the pump 3 starts to work, after the liquid level of the energy storage area 13 reaches the top of the partition 10, the excess simulated liquid overflows from the top of the partition 10 into the discharge area 14, and then returns to the low-level fluid tank through the discharge pipeline In this way, the liquid level of the energy storage area 13 in the high-level fluid tank 8 remains unchanged relative to the high-level fluid tank.

In this embodiment, the flow is discharged through the partition plate, the discharge area 14 and the discharge pipeline 9; in the foregoing embodiments, the flow is discharged through the third opening and the discharge pipeline 9 arranged on the side wall of the high-level fluid tank; this embodiment Those skilled in the art can understand that other similar methods can also be used to drain the excess blood simulation liquid in the high-level fluid tank to the low-level fluid tank, and also keep the liquid level in the high-level fluid tank relative to the high-level fluid tank. Just leave it unchanged. Herein, these leakage structures are collectively referred to as "discharge channels". According to the description of the foregoing embodiments, it can be seen that the discharge position provided by the discharge channel for the high-level fluid tank or the energy storage area of the high-level fluid tank (such as the third opening or the top of the partition in the foregoing embodiments) is higher than The positions of the first opening and the second opening are such that a certain volume of blood flow simulation fluid with a certain potential energy is collected in the high-level fluid tank or the energy storage area of the high-level fluid tank.

Certainly, in other embodiments of the present invention, no discharge channel may be provided, and the simulated blood fluid may naturally overflow from the high-level fluid tank.

Other structures in this embodiment are the same as those in the foregoing embodiments, and will not be repeated here.

The present invention has been described above through specific examples, but the present invention is not limited to these specific examples. Those skilled in the art should understand that various modifications, equivalent replacements, changes, etc. can also be made to the present invention. As long as these changes do not deviate from the spirit of the present invention, they should all be within the protection scope of the present invention.

Claims (11)

1. A blood flow simulation device, characterized in that: comprising: frame; A low-level fluid tank filled with simulated blood fluid; A high-level fluid tank, the high-level fluid tank is connected to the frame through a connecting device, and can move up and down along the frame, and the high-level fluid tank is provided with a first opening and a second opening; a pump comprising an inlet and an outlet; A pump input pipeline, one end of the pump input pipeline is connected to the input port, and the other end extends into the blood simulated liquid in the low-level fluid tank; A fluid upward pipeline, one end of the fluid upward pipeline is connected to the output port of the pump, and the other end is connected to the first opening of the high-level fluid tank; A simulated blood flow pipeline, one end of the simulated blood flow pipeline is connected to the second opening of the high-level fluid tank, and the other end extends into the low-level fluid tank. 2. The blood flow simulation device according to claim 1, characterized in that: the connection device comprises a slider, a slide rail, and a stop mechanism; the slide rail is fixedly connected to the frame, and the slider It is fixedly connected to the high-level fluid tank, and the slider is slidingly matched with the slide rail; the stop mechanism is arranged on the frame or the high-level fluid tank. 3. The blood flow simulation device according to claim 1, characterized in that: the connection device includes a gear, a rack, and a stop mechanism; the gear is connected to the high-level fluid tank through a rotating shaft, and the rack Fixed on the frame, the gear meshes with the rack; the stop mechanism is arranged on the frame or the high-level fluid tank. 4. The blood flow simulation device according to claim 2 or 3, characterized in that: the stop mechanism includes bolts and friction plates, the bolts are screwed to the frame or the high-level fluid tank, and the The front end of the bolt is in contact with the friction plate. 5 . The blood flow simulation device according to claim 1 , wherein a discharge channel is further provided on the high-level fluid tank, and the position of the discharge channel is higher than the first opening and the second opening. 6 . 6 . The blood flow simulation device according to claim 5 , wherein the discharge channel includes a third opening and a discharge pipeline provided on the high-level fluid tank, and one end of the discharge pipeline is connected to to the third opening, and the other end extends into the lower fluid groove. 7. The blood flow simulation device according to claim 5, wherein the leakage channel comprises a partition arranged in the high-level fluid tank, and the first opening and the second opening are located on the partition On the same side of the baffle, the drain channel also includes a third opening and a drain line arranged on the high-level fluid tank, and the third opening is located on the side of the partition with the first opening and the second opening. On the other side opposite to the opening, one end of the drain pipeline is connected to the third opening, and the other end extends into the lower fluid tank. 8. The blood flow simulation device according to claim 1, characterized in that: the flow rate in the fluid upstream pipeline is greater than the flow rate in the simulated blood flow pipeline. 9. The blood flow simulation device according to claim 1, wherein a scale is arranged on the frame. 10. The blood flow simulation device according to claim 1, further comprising a simulated blood flow pipeline support, at least part of the simulated blood flow pipeline is supported on the simulated blood flow pipeline support. 11. A blood flow simulation device, characterized in that: comprising: frame; A low-level fluid tank filled with simulated blood fluid; a high-level fluid tank, the high-level fluid tank is connected to the frame, and is provided with a first opening and a second opening; a pump comprising an inlet and an outlet; A pump input pipeline, one end of the pump input pipeline is connected to the input port, and the other end extends into the blood simulated liquid in the low-level fluid tank; A fluid upward pipeline, one end of the fluid upward pipeline is connected to the output port of the pump, and the other end is connected to the first opening of the high-level fluid tank; A simulated blood flow pipeline, one end of the simulated blood flow pipeline is connected to the second opening of the high-level fluid tank, and the other end extends into the low-level fluid tank; A simulated blood flow line support, the simulated blood flow line support is connected to a vertical support or the frame through a connecting device, and can move up and down along the frame, the simulated blood flow line At least part of the circuit is supported on the simulated blood flow pipeline support; the contact position between the simulated blood flow pipeline support and the simulated blood flow pipeline is the detection position of simulated blood flow.