Precise double-flow injection control device and method for roller pump type high-pressure injector

Abstract

The invention discloses a precise double-flow injection control device and method for a roller pump type high-pressure injector, and relates to the technical field of medical injection systems.The precise double-flow injection control device comprises a first pipeline, a second pipeline and a third pipeline, and one ends of the first pipeline, the second pipeline and the third pipeline are connected with a puncture needle; the other ends of the first pipeline and the third pipeline are communicated with a roller pump type high-pressure injector pipeline through a four-way device, the first pipeline and the third pipeline are used for circulation of a contrast agent, and the second pipeline is used for circulation of normal saline; the first pipeline, the second pipeline and the third pipeline are respectively provided with a proportional valve, and the flow of the corresponding pipeline is controlled by adjusting the opening and closing or the opening degree of the proportional valves. The double-flow function of the roller pump type high-pressure injector can be achieved.

Description

Technical Field

[0001] The present invention relates to a precise dual - flow injection control device and method for a roller - pump type high - pressure injector, belonging to the technical field of medical injection systems. Background Art

[0002] The use of high - pressure injectors in non - invasive vascular imaging techniques (CTA) requires injecting a large amount of contrast agent, and the increase in contrast agent will lead to an increase in the burden on the human body. Introducing the dual - flow injection technology to inject contrast agent and physiological saline into the human body simultaneously can reduce the dosage of contrast agent while having a good imaging effect.

[0003] The dual - flow injection controls the injection of the mixture of contrast agent and physiological saline into the human body, and for different patients and different parts of the examination, the ratio of contrast agent to physiological saline is inconsistent. Precise control of the dual - flow ratio to reduce the contrast agent intake of patients and improve the imaging effect is well - received by doctors in medical diagnosis.

[0004] Currently, syringe - type high - pressure injectors have achieved dual - flow injection, which depends on the fact that syringe - type high - pressure injectors have independent syringes and independent driving devices for contrast agent and physiological saline. Therefore, the control of the dual - flow ratio is transformed into the control of the speed ratio of the two motors, and the two motors are started and stopped synchronously. The two liquids are mixed at the Y - type pipeline connected to the outlets of their respective syringes. The method is simple and the control accuracy is high. However, syringe - type high - pressure injectors need to suck the liquid medicine from the medicine bottle into the syringe and perform the exhaust operation, which seriously reduces the clinical work efficiency. The roller - pump type high - pressure injector uses a roller pump to replace the syringe, which cleverly solves this problem and is welcomed by users.

[0005] However, the existing roller - pump type high - pressure injector has only one power source and needs to use the power of the roller pump to suck the contrast agent and physiological saline into the main pipe in proportion for mixing. Since the two structures are inconsistent, it is impossible to borrow the method of syringe - type high - pressure injectors to achieve the dual - flow function. Therefore, the existing roller - pump type high - pressure injector fails to achieve the dual - flow function. Summary of the Invention

[0006] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a precise dual - flow injection control device and method for a roller - pump type high - pressure injector to achieve the dual - flow function of the roller - pump type high - pressure injector.

[0007] To achieve the above - mentioned purpose, the present invention is implemented by the following technical solutions: In a first aspect, the present invention provides a precise dual-fluid injection control device for a roller pump type high-pressure injector, which includes a first pipeline, a second pipeline, and a third pipeline. One end of the first pipeline, the second pipeline, and the third pipeline is connected to a puncture needle, and the other ends are all communicated with the pipeline of the roller pump type high-pressure injector through a four-way device. Among them, the first pipeline and the third pipeline are used for circulating contrast agent, and the second pipeline is used for circulating physiological saline; Proportioning valves are respectively arranged on the first pipeline, the second pipeline, and the third pipeline, and the flow rate of the corresponding pipeline is controlled by adjusting the opening or closing degree of the proportioning valve.

[0008] Furthermore, it further includes a flow rate monitoring module arranged on the second pipeline. The roller pump type high-pressure injector is equipped with a controller. The flow rate monitoring module, the proportioning valve, and the controller are electrically connected. The flow rate monitoring module is used to monitor the flow rate of physiological saline in the second pipeline in real time and transmit it to the controller. The controller is used to calculate the total flow rate of the injection solution and the flow rate of physiological saline to obtain the current ratio of the contrast agent to physiological saline, and adjust the opening degree of the proportioning valve according to the current ratio of the contrast agent to physiological saline.

[0009] Furthermore, the flow rate monitoring module is a non-invasive flow rate monitoring sensor, and the non-invasive flow rate monitoring sensor is provided with a card slot, and the card slot is used to clamp the corresponding pipeline.

[0010] Furthermore, the total flow rate of the injection solution is calculated by the number of rotation cycles of the roller pump.

[0011] Furthermore, the roller pump type high-pressure injector is provided with a clamping position, and the clamping position is used to embed the whole device, so that the liquid in the first pipeline, the second pipeline, and the third pipeline flows from top to bottom into the pipeline of the roller pump type high-pressure injector.

[0012] Furthermore, the proportioning valve has a stepless adjustment function.

[0013] Furthermore, the diameters of the first pipeline, the second pipeline, the third pipeline, and the pipeline of the roller pump type high-pressure injector are the same.

[0014] In a second aspect, the present invention also provides a precise dual-fluid injection control method for a roller pump type high-pressure injector, based on the above-mentioned precise dual-fluid injection control device for a roller pump type high-pressure injector, which includes the following steps: Obtain the real-time flow rate of physiological saline; Calculate the total flow rate of the injection solution according to the number of rotation cycles of the roller pump of the roller pump type high-pressure injector; Calculate the real-time contrast agent flow rate according to the total flow rate of the injection solution and the real-time flow rate of physiological saline; Adjust the opening degree of the proportional valve on the corresponding pipeline according to the real-time saline flow rate and the real-time contrast agent flow rate to achieve the preset ratio of the real-time saline flow rate and the real-time contrast agent flow rate.

[0015] In a third aspect, the present invention also provides a roller pump type high-pressure injector, including: the roller pump type high-pressure injector precise double-flow injection control device as described in any one of the above.

[0016] Compared with the prior art, the beneficial effects achieved by the present invention are: The present invention connects each pipeline through a four-way device, and uses a proportional valve to control the start-stop or opening degree of the corresponding pipelines for flowing saline and contrast agent, so that the saline and contrast agent entering the roller pump type high-pressure injector meet the preset ratio. Finally, the two are mixed in the main pipeline by the roller pump, and the total flow rate can be obtained by the roller pump. By obtaining the saline flow rate through the flow monitoring module, the contrast agent flow rate can be obtained, so as to conveniently adjust the proportional valve in real time according to the monitoring results, realize the double-flow function, and the operation is simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of the roller pump type high-pressure injector precise double-flow injection control device in an embodiment of the present invention; In the figure: 1-roller pump type high-pressure injector pipeline, 2-four-way device, 3-first pipeline, 4-second pipeline, 5-third pipeline, 6-flow monitoring module, 7-proportional valve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The present invention will be further described below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention, and cannot be used to limit the protection scope of the present invention. Embodiment 1

[0019] As Figure 1 shown, the embodiment of the present invention provides a roller pump type high-pressure injector precise double-flow injection control device, including a first pipeline 3, a second pipeline 4 and a third pipeline 5. The upper ends of the first pipeline 3, the second pipeline 4 and the third pipeline 5 are connected to a puncture needle, and the other ends are connected to the roller pump type high-pressure injector pipeline 1 through a four-way device 2.

[0020] In this embodiment, the first pipeline 3 and the third pipeline 5 are used for introducing contrast agent, and the second pipeline 4 is used for introducing saline. Generally, one of the first pipeline 3 and the second pipeline 4 can be selected during use.

[0021] In some embodiments, to facilitate controlling the saline and contrast agent to reach the set ratio, the diameters of the first pipeline 3, the second pipeline 4, the third pipeline 5 and the roller pump type high-pressure injector pipeline 1 are the same.

[0022] The roller pump type high pressure injector is provided with a clamping position and an outer door. The above-mentioned dual-flow injection control device can embed the corresponding pipelines in the corresponding clamping positions to ensure that the first pipeline 3, the second pipeline 4 and the third pipeline 5 and the roller pump type high pressure injector pipeline 1 are ensured to flow from top to bottom.

[0023] It also includes three proportional valves 7, which are in corresponding contact with the connection points of the first pipeline 3, the second pipeline 4, the third pipeline 5 and the four-way device 2 respectively. In this embodiment, the proportional valve 7 has a stepless adjustment function and is installed inside the roller pump high-pressure syringe. The proportional valve 7 pushes the pipeline to resist the outer door, thereby compressing the flow area of ​​the pipeline and changing the liquid flow rate.

[0024] Before use, the contrast agent and saline are calibrated using the device to determine the opening or duty cycle of the proportional valve at a preset ratio. The duty cycle means that when one proportional valve is opened, the other proportional valve is closed. Then, when the amount of liquid corresponding to the opened proportional valve 7 flowing into the roller pump high-pressure syringe pipeline 1 reaches a certain amount, the currently closed proportional valve 7 is opened to circulate the other liquid, and the two are circulated separately to control the ratio of the two.

[0025] The method for using the above roller pump type high pressure injector precise dual-flow injection control device in conjunction with the roller pump type high pressure injector is as follows: The precise dual-flow injection control device for a roller pump high-pressure injector is installed on the clamping position of the roller pump high-pressure injector, so that the proportional valve 7 is in contact with the connection between the four-way device 2 and the first pipeline 3, the second pipeline 4 and the third pipeline 5 respectively, while ensuring that the liquid in the first pipeline 3, the second pipeline 4 and the third pipeline 5 flows from top to bottom to the roller pump high-pressure injector pipeline 1.

[0026] The physiological saline and contrast agent are calibrated, and the proportional valve is adjusted after the opening or duty cycle of the proportional valve 7 on the corresponding pipeline under the set ratio is determined.

[0027] By introducing contrast agent into the first pipeline 3 or the third passage 5 and introducing physiological saline into the second pipeline 4, the injection of the injection solution of the preset ratio can be achieved. Example 2

[0028] On the basis of Example 1, the second pipeline 4 of this embodiment is provided with a flow monitoring module 6, which is a non-invasive flow monitoring sensor. Specifically, the non-invasive flow monitoring sensor is provided with a card slot, and the second pipeline 4 is carded in the second pipeline 4 to achieve real-time monitoring of the flow of physiological saline in the second pipeline 4. The roller pump type high-pressure syringe is equipped with a controller, and the flow monitoring module 6 and the proportional valve 7 are electrically connected to the controller.

[0029] The flow monitoring module 6 transmits the flow rate of the physiological saline in the second pipeline 4 monitored in real time to the controller. The controller can calculate the total liquid flow rate based on the number of rotations of the roller pump. Subtracting the flow rate of the physiological saline in the second pipeline 4 from the total liquid flow rate can obtain the flow rate of the contrast agent. By knowing the flow rate of the contrast agent and the physiological saline, the current ratio between the two can be known. Then, comparing it with the preset ratio, the opening degree, start or stop of the proportional valve 7 is adjusted according to the comparison result until the preset ratio is reached. Embodiment 3

[0030] Based on Embodiment 2, this embodiment provides a precise dual - flow injection control method for a roller - pump type high - pressure injector, which includes the following steps: Obtain the real - time physiological saline flow rate.

[0031] Calculate the total injection liquid flow rate according to the number of rotations of the roller pump of the roller - pump type high - pressure injector.

[0032] Calculate the real - time contrast agent flow rate according to the total injection liquid flow rate and the real - time physiological saline flow rate.

[0033] Adjust the opening degree of the proportional valve on the corresponding pipeline according to the real - time physiological saline flow rate and the real - time contrast agent flow rate to reach the preset ratio of the real - time physiological saline flow rate and the real - time contrast agent flow rate. Embodiment 4

[0034] This embodiment provides a roller - pump type high - pressure injector, which includes the precise dual - flow injection control device of the roller - pump type high - pressure injector as described in Embodiment 2.

[0035] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and deformations can be made, and these improvements and deformations should also be regarded as the protection scope of the present invention.

Claims

1. A roller pump type high pressure syringe precision double flow injection control device, characterized in that: It comprises a first pipeline, a second pipeline and a third pipeline, wherein one end of the first pipeline, the second pipeline and the third pipeline is connected to the puncture needle, and the other end is connected to the roller pump type high-pressure syringe pipeline through a four-way device, wherein the first pipeline and the third pipeline are used to circulate contrast agent, and the second pipeline is used to circulate physiological saline; The first pipeline, the second pipeline, and the third pipeline are respectively provided with proportional valves, and the flow of the corresponding pipelines is controlled by adjusting the opening and closing or the opening degree of the proportional valves.

2. The roller pump type high pressure syringe precise dual flow injection control device according to claim 1, characterized in that: It also includes a flow monitoring module arranged on the second pipeline. The roller pump high-pressure injector is equipped with a controller. The flow monitoring module and the proportional valve are electrically connected to the controller. The flow monitoring module is used to monitor the flow of saline in the second pipeline in real time and transmit it to the controller. The controller is used to calculate the total flow of the injection liquid and the flow of saline to obtain the current ratio of contrast agent to saline, and adjust the opening of the proportional valve according to the current ratio of contrast agent to saline.

3. The roller pump type high pressure syringe precise dual flow injection control device according to claim 2, characterized in that: The flow monitoring module is a non-invasive flow monitoring sensor, and the non-invasive flow monitoring sensor is provided with a card slot, and the card slot is used to card the corresponding pipeline.

4. The roller pump type high pressure syringe precise dual flow injection control device according to claim 2, characterized in that: The total flow rate of the injection liquid is calculated by the number of rotations of the roller pump of the roller pump type high-pressure injector.

5. The roller pump type high pressure syringe precise dual flow injection control device according to claim 1, characterized in that: The roller pump type high pressure injector is provided with a clamping position, which is used to embed the entire device so that the liquid in the first pipeline, the second pipeline and the third pipeline flows from top to bottom to the roller pump type high pressure injector pipeline.

6. The roller pump type high pressure syringe precise dual flow injection control device according to claim 1, characterized in that: The proportional valve has a stepless adjustment function.

7. The roller pump type high pressure syringe precise dual flow injection control device according to claim 1, characterized in that: The diameters of the first pipeline, the second pipeline, the third pipeline and the roller pump type high-pressure injector pipeline are all the same.

8. A roller pump type high pressure injector precise double flow injection control method, characterized in that: The roller pump type high pressure injector precise dual flow injection control device according to claim 2 comprises the following steps: Get real-time saline flow; The total flow rate of the injection liquid is calculated according to the number of rotations of the roller pump of the roller pump high-pressure syringe; The real-time contrast medium flow rate is calculated based on the total injection flow rate and the real-time saline flow rate; The opening of the proportional valve on the corresponding pipeline is adjusted according to the real-time saline flow rate and the real-time contrast agent flow rate to achieve a preset ratio of the real-time saline flow rate and the real-time contrast agent flow rate.

9. A roller pump type high pressure injector, characterized in that: include: A precise dual-flow injection control device for a roller pump high-pressure injector as described in any one of claims 1 to 7.

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