Carbon dioxide angiography injector control method and apparatus, and angiography injector

Abstract

The present application provides a carbon dioxide angiography injector control method and apparatus, and an angiography injector, pertaining to the technical field of carbon dioxide angiography. According to the carbon dioxide angiography injector control method of the present application, a second length of a spring is determined on the basis of a target injection speed, an initial injection speed, and a first length. On the basis of achieving precise control of an angiography injection volume, the degree of pre-compression of the spring can be determined, so that the injection speed and the injection volume can be precisely controlled, thereby meeting injection requirements under different circumstances and improving the accuracy and controllability of CO angiography; the injection speed is increased, and the injection time is shortened, thereby improving the efficiency and speed of the angiography process. The present application fully utilizes the spring in the existing structure, eliminates the need for an additional pressurizing apparatus and the like, and reduces modifications to the device and costs.

Description

Carbon dioxide contrast injector control method, device and contrast injector

[0001] Cross-reference to Related Applications

[0002] The present application claims priority from the Chinese patent application No. 202410828438.2 filed on June 25, 2024, and entitled "Carbon dioxide contrast injector control method, device and contrast injector", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present application relates to the technical field of carbon dioxide angiography, and in particular to a carbon dioxide contrast injector control method, device and contrast injector. BACKGROUND

[0004] Carbon dioxide naturally exists in the human body, has good biocompatibility, can be dissolved in blood, and can be exhaled through respiration, and has no toxicity to the liver and kidney, so it is often used as a contrast agent for blood vessel radiography.

[0005] In the related art, when carbon dioxide is needed to be used for angiography, carbon dioxide needs to be injected into the body. The operator usually first extracts carbon dioxide from a carbon dioxide cylinder into a syringe, and then injects the carbon dioxide into an external injection device connected to the angiography object, so that the carbon dioxide enters the body, and then realizes the radiography of the blood vessels.

[0006] Different contrast push and contrast positions are different due to individual differences, and the amount and injection speed of carbon dioxide required for angiography are different, which can reduce the discomfort of the contrast object as much as possible when injecting carbon dioxide, and improve the final contrast quality. However, the carbon dioxide gas filler in the prior art can only simply realize the injection function of carbon dioxide, and it is difficult to control the gas amount of the contrast, and it is impossible to control the injection speed and contrast time of the carbon dioxide contrast agent. SUMMARY

[0007] The present application provides a carbon dioxide contrast injector control method, device and contrast injector to solve the defect that the injection speed of the contrast cannot be controlled in the prior art, and to realize the effect of pre-compressing the spring to control the gas amount, injection speed and time of the contrast.

[0008] The application provides a carbon dioxide contrast injection control method, the contrast injection includes a filling pipe for storing and filling carbon dioxide, a piston for adjusting the volume of the filling pipe and a spring are arranged in the filling pipe, a chamber for storing carbon dioxide is formed between one end of the filling pipe and the piston, the other end of the filling pipe is provided with a spring, the spring pushes the piston to move when deformed, and the method comprises:

[0009] Obtaining a target injection speed and a target injection amount of contrast;

[0010] Based on the target injection amount and the cross-sectional area of the filling pipe, the first length of the spring and the initial injection speed corresponding to the first length are determined; the first length is the length of the spring when the volume of the chamber between the one end of the filling pipe and the piston is the target injection amount;

[0011] In the case that the target injection speed is greater than the initial injection speed, the second length of the spring is determined based on the target injection speed, the initial injection speed and the first length;

[0012] Before filling carbon dioxide into the chamber for storing carbon dioxide formed between the one end of the filling pipe and the piston, the spring is pre-compressed to the second length based on the first length; the second length is the length of the spring when the filling pipe performs carbon dioxide contrast injection.

[0013] According to the carbon dioxide contrast injection control method provided by the application, the first length of the spring and the initial injection speed corresponding to the first length are determined based on the target injection amount and the cross-sectional area of the filling pipe, which comprises:

[0014] Based on the target injection amount and the cross-sectional area of the filling pipe, the storage position of carbon dioxide gas in the filling pipe is determined;

[0015] Based on the storage position of carbon dioxide, the first length of the spring is determined;

[0016] Based on the first length of the spring, the elastic coefficient of the spring and the cross-sectional area of the filling pipe, the target pressure difference generated by the spring to carbon dioxide in the filling pipe is obtained;

[0017] Based on the target pressure difference and the density of carbon dioxide, the gas flow rate of carbon dioxide is obtained, and the initial injection speed is obtained based on the gas flow rate of carbon dioxide.

[0018] According to the carbon dioxide contrast injection control method provided by the application, the second length of the spring is determined by the following formula:

[0019] wherein x1 is the deformation of the spring at the first length, x2 is the deformation of the spring at the second length, v1 is the initial injection speed, and v2 is the target injection speed.

[0020] According to the carbon dioxide contrast injection device control method provided in the present application, the filling pipe near one end of the piston of the spring is provided with a baffle, the baffle is fixed with a pull rod for adjusting the position of the baffle, the pull rod extends out of the filling pipe from the end of the filling pipe far from the injection port; the pre-compression of the spring from the first length to the second length comprises:

[0021] moving the baffle in the direction far from the injection port through the pull rod until the volume of the cavity between the baffle and the filling pipe is the target injection amount, and fixing the baffle;

[0022] compressing the end of the spring far from the injection port until the spring is compressed to the second length.

[0023] According to the carbon dioxide contrast injection device control method provided in the present application, the filling pipe far from the piston is provided with a driving member, and the end of the spring far from the injection port is fixedly connected with the driving end of the driving member; the compression of the end of the spring far from the injection port until the spring is compressed to the second length comprises:

[0024] compressing the end of the spring far from the injection port through the driving of the driving member until the spring is compressed to the second length.

[0025] The present application further provides a carbon dioxide contrast injection device control device, comprising:

[0026] an acquisition module configured to acquire a target injection speed and a target injection amount of contrast;

[0027] a first processing module configured to determine a first length of a spring and an initial injection speed corresponding to the first length based on the target injection amount and the cross-sectional area of a filling pipe; the first length is the length of the spring when the volume of the cavity between one end of the filling pipe and the piston is the target injection amount;

[0028] a second processing module configured to determine a second length of the spring based on the target injection speed, the initial injection speed and the first length in the case that the target injection speed is greater than the initial injection speed;

[0029] a third processing module configured to pre-compress the spring to the second length based on the first length before carbon dioxide is filled into a chamber for storing carbon dioxide formed between one end of the filling tube and the piston; the second length being the length of the spring when the filling tube is used for carbon dioxide contrast injection.

[0030] The application further provides a contrast injector, comprising a filling tube for storing and filling carbon dioxide, a piston for adjusting the volume of the filling tube and a spring being arranged in the filling tube, a chamber for storing carbon dioxide being formed between one end of the filling tube and the piston, the other end of the filling tube being provided with the spring, the spring pushing the piston to move when deformed, the end of the spring close to the piston being provided with a baffle, a pull rod for adjusting the position of the baffle being fixed on the baffle, the pull rod extending out of the filling tube from the end of the filling tube away from the injection port, the end of the filling tube away from the piston being provided with a driving member, the end of the spring away from the injection port being fixedly connected with the driving end of the driving member, the contrast injector using the above-mentioned control method of the carbon dioxide contrast injector to control the baffle and the driving member before contrast injection, so that the spring is compressed to the second length.

[0031] According to the contrast injector provided by the application, the driving member is an adjusting rod for manual adjustment, one end of the adjusting rod being fixedly connected with the end of the spring away from the injection port, the other end of the adjusting rod extending out of the filling tube from the end of the filling tube away from the injection port.

[0032] Alternatively, the driving member is an electric motor, the driving end of the electric motor being fixedly connected with the end of the spring away from the injection port.

[0033] The application further provides an electronic device, comprising a memory, a processor and a computer program stored in the memory and executable on the processor, the processor implementing the above-mentioned control method of the carbon dioxide contrast injector when executing the program.

[0034] The application further provides a non-transitory computer readable storage medium, the medium storing a computer program, the computer program being executable on a processor to implement the above-mentioned control method of the carbon dioxide contrast injector.

[0035] The application further provides a computer program product, comprising a computer program, the computer program being executable on a processor to implement the above-mentioned control method of the carbon dioxide contrast injector.

[0036] The carbon dioxide contrast injection control method, device and contrast injection device provided by the application can determine the second length of the spring through the target injection speed, the initial injection speed and the first length, can determine the pre-compression degree of the spring on the basis of realizing the accurate control of the contrast injection amount, can accurately control the injection speed and the injection amount, meets the injection requirements in different situations, improves the accuracy and controllability of CO angiography, increases the injection speed, shortens the injection time, thereby improves the efficiency and speed of the contrast process, fully utilizes the spring in the existing structure, does not need to additionally set a pressurizing device and the like, and reduces the modification and cost of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0038] Fig. 1 is a flowchart of the carbon dioxide contrast injection control method provided by the application;

[0039] Fig. 2 is a flowchart of the carbon dioxide contrast injection control method provided by the application;

[0040] Fig. 3 is a structural schematic diagram of the carbon dioxide contrast injection device provided by the application;

[0041] Fig. 4 is a structural schematic diagram of the carbon dioxide contrast injection device provided by the application;

[0042] Fig. 5 is a structural schematic diagram of the carbon dioxide contrast injection control device provided by the application;

[0043] Fig. 6 is a structural schematic diagram of the electronic device provided by the application.

[0044] Reference signs: 310: spring; 320: piston; 330: baffle; 340: pull rod; 350: filling pipe; 360: chamber; 370: adjusting rod; 380: injection port. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solutions and advantages of the application more clear, the technical solutions in the application will be clearly and completely described below in combination with the drawings in the application. Obviously, the described embodiments are some embodiments of the application, but not all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the application.

[0046] The carbon dioxide contrast injection control method, device and contrast injection device of the present application are described below in combination with FIG. 1-6.

[0047] Before the carbon dioxide contrast injection control method of the embodiment of the present application is described, the contrast injection device of the embodiment of the present application is described.

[0048] It can be understood that the contrast injection device includes a charging pipe for storing and charging carbon dioxide. Before performing angiography on a contrast object, carbon dioxide gas needs to be charged into the charging pipe from a gas cylinder or the like, and then injected into the contrast object through the charging pipe.

[0049] In order to control the amount of injected carbon dioxide gas, a piston for adjusting the volume of the charging pipe and a spring are arranged in the charging pipe. One end of the charging pipe and the piston form a chamber for storing carbon dioxide, and the other end of the charging pipe is provided with a spring. When the spring is deformed, the spring pushes the piston to move. By adjusting the compression and stretching degree of the spring, the piston is located at different positions in the charging pipe, and then the size of the chamber for storing carbon dioxide gas can be controlled by the piston at different positions, so as to control the amount of carbon dioxide injection.

[0050] As shown in FIG. 1, the carbon dioxide contrast injection control method of the embodiment of the present application mainly includes steps 110, 120, 130 and 140.

[0051] Step 110: obtaining a target injection speed and a target injection amount of the contrast.

[0052] It can be understood that the target injection speed and the target injection amount of the contrast can be determined according to the basic information of the contrast object, such as age, weight and specific part to be imaged.

[0053] The contrast operator accumulates rich experience in actual operation, and can determine the target injection speed and injection amount according to the patient's condition and clinical needs. This method depends on the experience and judgment ability of medical staff. By using the intelligent characteristics of modern medical equipment, the information of the contrast object can be analyzed by an automatic parameter confirmation model, and the target injection speed and injection amount can be determined according to the analysis result. This method can improve the accuracy and controllability of injection.

[0054] In other words, the target injection speed and the target injection amount can be obtained according to experience, or can be obtained by analyzing the information of the contrast object through an automatic parameter confirmation model, which is not limited here.

[0055] Step 120: determining a first length of the spring and an initial injection speed corresponding to the first length based on the target injection amount and the cross-sectional area of the charging pipe.

[0056] It can be understood that after the target injection amount is determined, the position of the piston can be determined according to the target injection amount and the cross-sectional area of the charging pipe, so that the chamber between the piston and the charging pipe can accommodate the target injection amount of carbon dioxide gas.

[0057] After the position of the piston is determined, the position of the spring can be determined, and then the first length of the spring can be obtained.

[0058] In other words, the first length is the length of the spring when the volume of the chamber between one end of the charging pipe and the piston is the target injection amount.

[0059] It can be understood that after the required target injection amount is determined, the position of the carbon dioxide storage can be calculated through the cross-sectional area and shape of the charging pipe, and then the position of the piston and the first length of the spring can be obtained.

[0060] According to the target injection amount and the cross-sectional area of the charging pipe, the position of the piston in the charging pipe can be calculated. This position can ensure that the chamber in the charging pipe can accommodate the target injection amount of carbon dioxide gas. Once the position of the piston is determined, the first length of the spring in the current state can be calculated according to the position of the piston and the volume of the chamber.

[0061] Through these calculations and parameter determinations, it can be ensured that the positions of the piston and the spring are appropriate when injecting CO contrast agent, so that the chamber in the charging pipe can accurately accommodate the target injection amount of gas, achieving precise control of the injection amount of contrast gas, thereby improving the accuracy and controllability of CO angiography.

[0062] In some embodiments, the charging pipe is communicated at one end of the injection port with an inlet and outlet pipe coaxial with the charging pipe, the inlet and outlet pipe is installed with a charging valve at an end away from the charging pipe, and the charging valve can adopt a three-way valve. The charging valve is communicated at an end away from the charging pipe with a gas injection pipe, the gas injection pipe is provided with a gas injection assembly at an end away from the charging valve, and one side of the charging valve is provided with an external injection device communicated with a blood vessel in the patient's body.

[0063] When carbon dioxide contrast imaging is needed, the operator first rotates the charging valve to make the gas injection pipe and the inlet and outlet pipe in communication, and then uses the gas injection assembly and the gas injection pipe to charge carbon dioxide into the charging pipe. After the carbon dioxide is fully charged, the spring is compressed to the first length, and at this time the volume of the chamber formed between the piston and the charging pipe for storing carbon dioxide is the target injection amount. When injection is performed, the charging valve is rotated to make the inlet and outlet pipe and the external injection device in communication, and the carbon dioxide in the charging pipe can be injected into the patient's body under the pressure of the spring deformation, finally enabling the patient to perform radiographic imaging.

[0064] In some embodiments, after the first length of the spring is known, the force of the spring on the piston in the chamber and the pressure of the piston on the carbon dioxide can be determined based on this, and then the flow rate of the carbon dioxide can be obtained, so as to determine the initial injection speed according to the cross-sectional area of the injection pipeline.

[0065] That is, as shown in FIG. 2, based on the target injection amount and the cross-sectional area of the charging pipeline, the first length of the spring and the initial injection speed corresponding to the first length are determined, including steps 121, 122, 123 and 124.

[0066] Step 121, based on the target injection amount and the cross-sectional area of the charging pipeline, the storage position of the carbon dioxide gas in the charging pipeline is determined.

[0067] Step 122, based on the storage position of the carbon dioxide, the first length of the spring is determined.

[0068] Step 123, based on the first length of the spring, the elastic coefficient of the spring and the cross-sectional area of the charging pipeline, the target pressure difference generated by the spring on the carbon dioxide in the charging pipeline is obtained.

[0069] Step 124, based on the target pressure difference and the density of the carbon dioxide, the gas flow rate of the carbon dioxide is obtained, and based on the gas flow rate of the carbon dioxide, the initial injection speed is obtained.

[0070] It can be understood that the target injection amount V tar and the cross-sectional area A of the charging pipeline are determined first, and the position of the carbon dioxide volume to be charged in the charging pipeline (i.e. the position of the piston) can be calculated by dividing the two parameters.

[0071] In this case, the position of the end of the spring close to the piston is the position of the piston, so the length of the spring can be determined, that is, the first length of the spring is determined based on the storage position of the carbon dioxide.

[0072] It should be noted that according to Hooke's law, the force F of the spring is proportional to the deformation x, that is, F=kx, k is the elastic coefficient of the spring. According to Bernoulli equation and flow equation, the gas flow rate v and the pressure difference ΔP satisfy the following fluid mechanics equation:

[0073] Wherein, ρ is the gas density, v is the gas flow rate, and ΔP is the pressure difference between the pressure received by the carbon dioxide in the charging pipeline and the pressure at the injection point.

[0074] The force F generated by the compression of the spring acts on the gas to form a pressure difference ΔP. The pressure difference can be expressed as:

[0075] The formula of the pressure difference is brought into the fluid mechanics equation to obtain:

[0076] That is,

[0077] In other words, based on the first length of the spring and the spring constant, the force F generated by the spring can be obtained, and by dividing F by the cross-sectional area A of the filling tube, the target pressure difference ΔP generated by the spring on the carbon dioxide in the filling tube can be obtained.

[0078] On this basis, based on the target pressure difference ΔP and the density ρ of the carbon dioxide, the gas flow rate v of the carbon dioxide is obtained, and based on the gas flow rate of the carbon dioxide and the cross-sectional area of the injection pipeline, the initial injection speed in the unit of volume flow rate is obtained.

[0079] Step 130, in the case where the target injection speed is greater than the initial injection speed, the second length of the spring is determined based on the target injection speed, the initial injection speed and the first length.

[0080] In the case where the target injection speed is greater than the initial injection speed, it means that the force generated by the spring at the current deformation degree is too small, which is not enough to make the carbon dioxide generate a sufficient flow rate to meet the requirement of the target injection speed.

[0081] In the present embodiment, the existing structure of the existing carbon dioxide contrast injector is fully utilized, and no additional pressure device is arranged at the injection outlet of the injector, and by increasing the deformation degree of the spring, the injection speed is increased by increasing the pressure of the spring on the carbon dioxide.

[0082] In this case, the second length of the spring at the target injection speed can be obtained according to the above relationship between the gas flow rate and the length of the spring.

[0083] That is, the second length of the spring is determined by the following formula:

[0084] Wherein, x1 is the deformation amount of the spring at the first length, x2 is the deformation amount of the spring at the second length, v1 is the initial injection speed, and v2 is the target injection speed.

[0085] In the present embodiment, the second length of the spring at the target injection speed can be accurately obtained according to the original length of the spring, the first length and the corresponding initial injection speed, so as to ensure that the injection speed can meet the requirement.

[0086] Step 140, before filling the carbon dioxide into the chamber formed between one end of the filling tube and the piston for storing the carbon dioxide, the spring is pre-compressed to the second length based on the first length.

[0087] Before the chamber formed between one end of the filling tube and the piston is filled with carbon dioxide, the spring can be pre-compressed from the first length to the second length and fixed at the position corresponding to the second length, so as to ensure that the initial pressure required in the chamber before filling is maintained. When the injection is performed, the free end of the spring, i.e., the end connected to the piston, is released, so that the spring can generate sufficient pressure to press out the carbon dioxide gas, thereby meeting the target injection speed of the carbon dioxide gas.

[0088] In the embodiment, the second length is the length of the spring when the carbon dioxide contrast injection is performed by the filling tube.

[0089] It can be understood that pre-compressing the spring and fixing it at the second length can ensure that the initial pressure required in the chamber before injection is maintained, thereby ensuring the stability and accuracy of the injection process.

[0090] Releasing the free end of the spring can make the spring generate sufficient pressure, so as to rapidly press out the carbon dioxide gas, thereby improving the injection speed and efficiency.

[0091] By pre-compressing the spring and releasing it, the compression amount of the spring is precisely controllable, and thus the amount of gas released during the injection process can be accurately controlled.

[0092] In the embodiment, the method is relatively simple and intuitive, and does not require complex operation steps or devices, which is beneficial to the use and mastery of the operator.

[0093] According to the carbon dioxide contrast injection control method provided in the embodiments of the present application, the second length of the spring is determined by the target injection speed, the initial injection speed, and the first length, the pre-compression degree of the spring can be determined on the basis of accurately controlling the contrast injection amount, and then the injection speed and the injection amount can be accurately controlled, which meets the injection requirements in different situations, improves the accuracy and controllability of CO angiography, increases the injection speed, and shortens the injection time, thereby improving the efficiency and speed of the contrast process, fully utilizes the spring in the existing structure, does not need to additionally set a pressurizing device, and reduces the modification and cost of the device.

[0094] In some embodiments, a baffle is arranged in the filling tube near the end of the spring connected to the piston, and a pull rod for adjusting the position of the baffle is fixed on the baffle and extends out of the filling tube from the end of the filling tube away from the injection port; the pre-compression of the spring from the first length to the second length comprises: moving the baffle away from the injection port by the pull rod until the volume of the chamber between the baffle and the filling tube is the target injection amount, and fixing the baffle; and compressing the end of the spring away from the injection port until the spring is compressed to the second length.

[0095] It should be noted that the volume of the chamber between the baffle and the filling tube is the target injection amount, the baffle is fixed at this time, and the spring is compressed to the first length under the action of the baffle. Then, carbon dioxide gas can be input into the filling tube for storage.

[0096] Specifically, carbon dioxide gas can be input from a carbon dioxide gas source into the chamber between the baffle and the filling tube through the injection port. During the input of the carbon dioxide gas, the piston is gradually moved towards the baffle under the extrusion of the gas, until the piston abuts against the baffle, at which time the chamber is filled with the target injection amount of carbon dioxide gas. On this basis, the spring can be further compressed away from the end of the injection port until the spring is compressed to the second length.

[0097] It can be understood that, as shown in FIG. 3, the end of the spring 310 close to the piston 320 is fixedly connected with the baffle 330, and the baffle 330 is fixedly connected with the pull rod 340 for adjusting the position of the baffle, the pull rod 340 can extend from the end of the filling tube 350 fixedly connected with the spring 310, so as not to affect the air tightness of the chamber 360 between the piston 320 and the filling tube 350, and also facilitate the adjustment of the compression degree of the spring 310. This design can realize the process of pre-compressing the spring 310 from the first length to the second length by moving and fixing the position of the baffle 330.

[0098] In order to fix the baffle to different gears, different scales can also be provided on the inner wall of the filling tube for marking different spring lengths, the end of the pull rod extending out of the filling tube can be fixed until the baffle is released by unlocking and moving the pull rod when injection is performed, so as to more accurately control the compression degree of the spring, and then realize the accurate adjustment of the injection speed.

[0099] For example, a series of equidistant scales can be uniformly provided on the inner wall of the filling tube, for example, a scale is provided every 1 millimeter or 0.5 millimeter. And a locking device is provided on the end of the pull rod extending out of the filling tube to fix the pull rod, for example, a clamp or buckle can be provided to realize the fixation of the pull rod and the baffle, so as to correspond to different injection speeds, and can be suitable for the case where more accurate spring length control and injection speed adjustment is required.

[0100] For another example, unequal scales can also be provided according to the variation law of the spring length, for example, dense scales are provided in the area where the compression degree of the spring is small, and fewer scales are provided in the area where the compression degree is large, so that the injection speed can be more conveniently adjusted.

[0101] In some embodiments, the spring 310 is fixedly connected to the piston 320 at one end of the piston 320, and the baffle 330 is arranged inside the spring 310. In this case, the baffle 330 has a small cross-sectional size, and the baffle 330 can move inside the spring 310 without affecting the movement of the spring 310.

[0102] Similarly, the baffle 330 is fixedly connected with a pull rod 340 for adjusting the position of the baffle 330. The pull rod 340 can extend from one end of the spring 310 fixed to the filling pipe 350, so as not to affect the air tightness of the chamber 360 between the piston 320 and the filling pipe 350, and facilitate the adjustment of the compression degree of the spring 310.

[0103] In this case, the baffle is fixedly connected with a pull rod for adjusting the position of the baffle, and the pull rod extends from one end of the filling pipe away from the injection port; and the spring is pre-compressed from the first length to the second length, including: moving the baffle away from the injection port by the pull rod until the volume of the chamber between the baffle and the filling pipe is the target injection amount, and fixing the baffle; and compressing one end of the spring away from the injection port until the spring is compressed to the second length.

[0104] It should be noted that the baffle is fixed when the volume of the chamber between the baffle and the filling pipe is the target injection amount, and the piston is fixed under the action of the baffle in the process of continuously inputting carbon dioxide into the chamber.

[0105] Specifically, carbon dioxide gas can be input from a carbon dioxide gas source to the chamber between the baffle and the filling pipe through the injection port. In the process of inputting the carbon dioxide gas, the piston is gradually moved towards the baffle under the extrusion of the gas, until the piston abuts against the baffle, at which time the chamber is filled with the target injection amount of carbon dioxide gas. On this basis, one end of the spring away from the injection port can be further compressed, and the fixed end of the spring and the piston remains fixed under the action of the carbon dioxide gas pressure in the chamber, so that the spring is always compressed to the second length.

[0106] In some embodiments, the filling pipe is provided with a driving member at one end away from the piston, and the fixed end of the spring away from the injection port is fixedly connected with a driving end of the driving member; and the fixed end of the spring away from the injection port is compressed until the spring is compressed to the second length, including: driving the fixed end of the spring away from the injection port to be compressed by the driving member until the spring is compressed to the second length.

[0107] It can be understood that the filling pipe is provided with the driving member inside the fixed end of the spring, and the fixed end of the spring and the piston is fixedly connected with the driving end of the driving member.

[0108] In some embodiments, the driving member can be an adjusting rod for manual adjustment.

[0109] As shown in FIG. 3, one end of the adjusting rod 370 is fixedly connected with the end of the spring 310 away from the injection port 380, and the other end of the adjusting rod 370 extends out of the inflation tube 350 from the end of the inflation tube 350 away from the injection port 380.

[0110] The spring can be further compressed by pushing the adjusting rod, so that the spring is compressed to the second length. For example, the end of the adjusting rod away from the spring can be provided with threads, and the inflation tube wall surface through which the adjusting rod extends out of the inflation tube can be provided with a threaded rod matched with the adjusting rod, so that the adjusting rod can be fixed. That is, only when the adjusting rod is turned in a certain direction, the adjusting rod will push the spring to be compressed. Of course, a fixing locking device can also be provided to fix the movement of the adjusting rod in the axial direction of the inflation tube, and the fixing mode of the adjusting rod is not limited here.

[0111] Alternatively, the driving member is an electric motor, and the driving end of the electric motor is fixedly connected with the end of the spring away from the injection port.

[0112] In this case, the inflation tube also needs to be provided with a power supply to supply power to the driving member. The outside of the inflation tube can be provided with a button to adjust the driving distance of the driving member to the spring, so that the compression degree of the spring can be controlled.

[0113] The control button can be installed at a suitable position on the outside of the inflation tube, for example, on the side or top of the inflation tube, so that the button can be easily used by the operator. When designing the function of the button, the button can be designed as a button for increasing the compression degree and a button for decreasing the compression degree, or as a button for adjusting the compression degree, and the operator can select a suitable button for adjustment according to needs.

[0114] The shape and size of the button are designed to be easy to operate and recognize, for example, a convex button or a button with obvious markings can be used to avoid misoperation during operation.

[0115] In the embodiment, the spring is driven by the driving member to be compressed to the second length, the control of the pre-compression of the spring is realized, and the adjustment of the length of the spring can be more conveniently realized, so that the precise control of the injection speed can be achieved.

[0116] The carbon dioxide contrast injection device control device provided in the present application will be described below, and the carbon dioxide contrast injection device control device described below can be correspondingly referred to the carbon dioxide contrast injection device control method described above.

[0117] As shown in FIG. 5, the carbon dioxide contrast injection device control device of the embodiment of the present application mainly includes an acquisition module 510, a first processing module 520, a second processing module 530, and a third processing module 540.

[0118] The acquisition module 510 is configured to acquire a target injection speed and a target injection volume of the contrast;

[0119] The first processing module 520 is configured to determine a first length of the spring and an initial injection speed corresponding to the first length based on the target injection volume and a cross-sectional area of the filling tube; the first length is a length of the spring when a volume of a chamber between one end of the filling tube and the piston is the target injection volume;

[0120] The second processing module 530 is configured to determine a second length of the spring based on the target injection speed, the initial injection speed and the first length when the target injection speed is greater than the initial injection speed.

[0121] The third processing module 540 is configured to pre-compress the spring to the second length based on the first length before the chamber between one end of the filling tube and the piston is filled with carbon dioxide; the second length is a length of the spring when the filling tube is used for carbon dioxide contrast injection.

[0122] The carbon dioxide contrast injector control device provided by the embodiment of the present application determines the second length of the spring based on the target injection speed, the initial injection speed and the first length, and can determine the pre-compression degree of the spring on the basis of accurate control of the contrast injection volume, thereby accurately controlling the injection speed and the injection volume, meeting the injection requirements in different situations, improving the accuracy and controllability of CO angiography, increasing the injection speed, shortening the injection time, thereby improving the efficiency and speed of the contrast process, fully utilizing the spring in the existing structure, without the need for additional pressure devices, and reducing the modification and cost of the equipment.

[0123] The embodiment of the present application also provides a contrast injector, which comprises a filling tube for storing and filling carbon dioxide, a piston and a spring arranged in the filling tube for adjusting the volume of the filling tube, a chamber for storing carbon dioxide formed between one end of the filling tube and the piston, and a spring arranged at the other end of the filling tube; the spring pushes the piston to move when it deforms; one end of the spring close to the piston is provided with a baffle, the baffle is fixed with a pull rod for adjusting the position of the baffle, and the pull rod extends out of the filling tube from the end of the filling tube away from the injection port; the end of the filling tube away from the piston is provided with a driving member, and the end of the spring away from the injection port is fixedly connected with a driving end of the driving member; the contrast injector uses the above-mentioned carbon dioxide contrast injector control method to control the baffle and the driving member before contrast injection, so that the spring is compressed to the second length

[0124] In some embodiments, the driving member is an adjusting rod for manual adjustment, one end of the adjusting rod is fixedly connected with the one end of the spring away from the injection port, and the other end of the adjusting rod extends out of the charging pipe from the one end of the charging pipe away from the injection port; or the driving member is an electric motor, and the driving end of the electric motor is fixedly connected with the one end of the spring away from the injection port.

[0125] Fig. 6 shows a schematic diagram of an electronic device, as shown in Fig. 6, the electronic device can include a processor 610, a communications interface 620, a memory 630 and a communications bus 640, wherein the processor 610, the communications interface 620 and the memory 630 complete mutual communication through the communications bus 640. The processor 610 can call the logic instructions in the memory 630 to execute the carbon dioxide contrast injection device control method, the method comprising: obtaining a target injection speed and a target injection amount of contrast; determining a first length of a spring and an initial injection speed corresponding to the first length based on the target injection amount and the cross-sectional area of the charging pipe; the first length is the length of the spring when the volume of the chamber between one end of the charging pipe and the piston is the target injection amount; in the case that the target injection speed is greater than the initial injection speed, determining a second length of the spring based on the target injection speed, the initial injection speed and the first length; before charging the chamber between one end of the charging pipe and the piston with carbon dioxide, pre-compressing the spring to the second length based on the first length; the second length is the length of the spring when the charging pipe is used for carbon dioxide contrast injection.

[0126] In addition, the logic instructions in the memory 630 described above can be implemented in the form of a software function unit and sold or used as an independent product, which can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application essentially or the part that contributes to the prior art or part of the technical solutions can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the embodiments of the present application. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, and various media that can store program codes.

[0127] In another aspect, the present application also provides a computer program product, which comprises a computer program, the computer program being stored in a non-transitory computer readable storage medium, and the computer program being executable by a processor to enable a computer to perform the carbon dioxide contrast injection device control method provided by the above method, the method comprising: obtaining a target injection speed and a target injection volume of a contrast; determining a first length of a spring and an initial injection speed corresponding to the first length based on the target injection volume and a cross-sectional area of a charging pipe; the first length being a length of the spring when a volume of a chamber between one end of the charging pipe and a piston is the target injection volume; in a case where the target injection speed is greater than the initial injection speed, determining a second length of the spring based on the target injection speed, the initial injection speed, and the first length; and pre-compressing the spring to the second length based on the first length before charging the chamber between the one end of the charging pipe and the piston with carbon dioxide; the second length being a length of the spring when the charging pipe performs carbon dioxide contrast injection.

[0128] In another aspect, the present application also provides a non-transitory computer readable storage medium, which stores a computer program, the computer program being executable by a processor to implement the carbon dioxide contrast injection device control method provided by the above method, the method comprising: obtaining a target injection speed and a target injection volume of a contrast; determining a first length of a spring and an initial injection speed corresponding to the first length based on the target injection volume and a cross-sectional area of a charging pipe; the first length being a length of the spring when a volume of a chamber between one end of the charging pipe and a piston is the target injection volume; in a case where the target injection speed is greater than the initial injection speed, determining a second length of the spring based on the target injection speed, the initial injection speed, and the first length; and pre-compressing the spring to the second length based on the first length before charging the chamber between the one end of the charging pipe and the piston with carbon dioxide; the second length being a length of the spring when the charging pipe performs carbon dioxide contrast injection.

[0129] The device embodiments described above are merely illustrative, wherein the units described as separate components can or can not be physically separate, and the components displayed as units can or can not be physical units, i.e., can be located in one place, or can be distributed on multiple network units. Part or all of the modules can be selected to achieve the purpose of the present embodiment scheme according to actual needs. Those skilled in the art can understand and implement without creative labor.

[0130] Those skilled in the art can clearly understand the implementation of the various embodiments by means of software and necessary general hardware platforms through the description of the above embodiments, and of course, the embodiments can also be implemented by hardware. Based on such understanding, the above technical solutions, essentially or in other words, the part of the prior art that contributes to the technical solutions can be embodied in the form of a software product. The computer software product can be stored in a computer readable storage medium, such as a ROM / RAM, a magnetic disk, an optical disk, and the like, and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0131] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for controlling a carbon dioxide contrast injector, characterized in that, The contrast injector includes an infusion tube for storing and filling carbon dioxide. A piston and a spring are disposed within the infusion tube for adjusting its capacity. One end of the infusion tube and the piston form a chamber for storing carbon dioxide. The other end of the infusion tube is provided with a spring that pushes the piston to move when deformed. The method includes: Obtain the target injection velocity and target injection volume for contrast imaging; Based on the target injection volume and the cross-sectional area of ​​the filling tube, a first length of the spring and an initial injection speed corresponding to the first length are determined; the first length is the length of the spring when the volume of the chamber between one end of the filling tube and the piston is the target injection volume. If the target injection speed is greater than the initial injection speed, the second length of the spring is determined based on the target injection speed, the initial injection speed, and the first length. Before filling the chamber for storing carbon dioxide, which is formed between one end of the filling tube and the piston, the spring is pre-compressed to the second length based on the first length; the second length is the length of the spring when carbon dioxide contrast injection is performed in the filling tube.

2. The carbon dioxide contrast injector control method according to claim 1, characterized in that, Determining the first length of the spring and the initial injection speed corresponding to the first length based on the target injection volume and the cross-sectional area of ​​the filling tube includes: Based on the target injection volume and the cross-sectional area of ​​the filling tube, the storage location of carbon dioxide gas in the filling tube is determined. The first length of the spring is determined based on the storage location of the carbon dioxide; The target pressure difference generated by the spring on the carbon dioxide in the filling tube is obtained based on the first length of the spring, the spring constant, and the cross-sectional area of ​​the filling tube. Based on the target pressure difference and the density of the carbon dioxide, the gas flow rate of the carbon dioxide is obtained, and the initial injection speed is obtained based on the gas flow rate of the carbon dioxide.

3. The carbon dioxide contrast injector control method according to claim 1, characterized in that, The second length of the spring is determined by the following formula: Where x1 is the deformation of the spring at the first length, x2 is the deformation of the spring at the second length, v1 is the initial injection velocity, and v2 is the target injection velocity.

4. The method for controlling a carbon dioxide contrast injector according to any one of claims 1-3, characterized in that, A baffle is provided inside the filling tube at one end of the spring near the piston. A pull rod for adjusting the position of the baffle is fixed on the baffle. The pull rod extends out of the filling tube from the end of the filling tube away from the injection port. The step of pre-compressing the spring to the second length based on the first length includes: The baffle is moved away from the injection port by the pull rod until the volume of the chamber between the baffle and the filling tube is the target injection volume, and then the baffle is fixed. Compress the end of the spring away from the injection port until the spring is compressed to the second length.

5. The carbon dioxide contrast injector control method according to claim 4, characterized in that, A driving element is provided at the end of the filling tube away from the piston, and the end of the spring away from the injection port is fixedly connected to the driving end of the driving element; compressing the end of the spring away from the injection port until the spring is compressed to the second length includes: The spring is compressed at the end away from the injection port by the driving member until the spring is compressed to the second length.

6. A control device for a carbon dioxide contrast injector, characterized in that, include: The acquisition module is configured to acquire the target injection speed and target injection volume for contrast imaging. The first processing module is configured to determine a first length of the spring and an initial injection speed corresponding to the first length based on the target injection volume and the cross-sectional area of ​​the filling tube; the first length is the length of the spring when the volume of the chamber between one end of the filling tube and the piston is the target injection volume. The second processing module is configured to determine the second length of the spring based on the target injection speed, the initial injection speed, and the first length when the target injection speed is greater than the initial injection speed. The third processing module is configured to pre-compress the spring to a second length based on the first length before filling the chamber for storing carbon dioxide formed between one end of the filling tube and the piston; the second length is the length of the spring when carbon dioxide contrast injection is performed in the filling tube.

7. A contrast-enhancing injector, characterized in that, The device includes a filling tube for storing and filling carbon dioxide. A piston and a spring are disposed within the filling tube for adjusting its capacity. One end of the filling tube and the piston form a chamber for storing carbon dioxide. The other end of the filling tube is provided with a spring that pushes the piston to move when deformed. A baffle is disposed at the end of the spring near the piston, and a pull rod for adjusting the position of the baffle is fixed to the baffle. The pull rod extends from the end of the filling tube away from the injection port. A drive member is disposed at the end of the filling tube away from the piston, and the end of the spring away from the injection port is fixedly connected to the drive end of the drive member. Before contrast injection, the contrast injector uses the carbon dioxide contrast injector control method as described in claim 5 to control the baffle and the drive member, so that the spring is compressed to a second length.

8. The contrast injector according to claim 7, characterized in that, The driving component is an adjustment rod for manual adjustment. One end of the adjustment rod is fixedly connected to the end of the spring away from the injection port, and the other end of the adjustment rod extends out of the filling tube from the end of the filling tube away from the injection port. Alternatively, the driving component is a motor, and the driving end of the motor is fixedly connected to the end of the spring away from the injection port.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and capable of running on the processor, characterized in that, When the processor executes the program, it implements the carbon dioxide contrast injector control method as described in any one of claims 1 to 5.

10. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the carbon dioxide contrast injector control method as described in any one of claims 1 to 5.

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