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 at 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, the pull rod extends out of the filling pipe from the end of the filling pipe away from the injection port; the pre-compression of the spring from the first length to the second length comprises:

[0021] moving the baffle away from the injection port through 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;

[0022] compressing the end of the spring away 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 is provided with a driving member at the end away from the piston, and the end of the spring away from the injection port is fixedly connected with the driving end of the driving member; the compression of the end of the spring away from the injection port until the spring is compressed to the second length comprises:

[0024] compressing the end of the spring away from the injection port through 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 chamber 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 when 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] [According to the rules 91 correction 03.12.2025] The carbon dioxide contrast injection control method, device and contrast injection 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, and can accurately control the injection speed and the injection amount, meets the injection requirements in different situations, improves the accuracy and controllability of CO2 angiography, increases the injection speed, shortens the injection time, and thus improves the efficiency and speed of the contrast process, fully utilizes the spring in the existing structure, and does not need to additionally set a pressurizing device, etc., 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 below. 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 provided by the application;

[0041] Fig. 4 is a structural schematic diagram of the carbon dioxide contrast injection 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 described clearly and completely below in combination with the drawings in the application. Obviously, the described embodiments are some embodiments of the application, not all embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the application.

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

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

[0048] It can be understood that the contrast injection device includes a charging pipe for storing and charging carbon dioxide, and before angiography of a contrast object, carbon dioxide gas needs to be charged from a gas cylinder or the like into the charging pipe, 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, the other end of the charging pipe is provided with a spring, and the spring pushes the piston to move when it is deformed. By adjusting the compression and stretching degree of the spring, the piston is located at different positions in the charging pipe, and then the chamber size for storing the amount of carbon dioxide gas can be controlled by the piston at different positions, so as to realize the control of the amount of carbon dioxide injection.

[0050] As shown in Fig. 1, the carbon dioxide contrast injection control method 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 the 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. And 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] At step 120, based on the target injection volume and the cross-sectional area of the charging tube, the first length of the spring and the initial injection speed corresponding to the first length are determined.

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

[0057] After the position of the piston is determined, the position of the spring can be determined, and 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 tube and the piston is the target injection volume.

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

[0060] According to the target injection volume and the cross-sectional area of the charging tube, the position of the piston in the charging tube can be calculated. This position can ensure that the chamber in the charging tube can accommodate the target injection volume 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] [Corrected according to Rule 91 on 03.12.2025] Through these calculations and parameter determinations, it can be ensured that the positions of the piston and the spring are appropriate when injecting CO2 contrast agent, so that the chamber in the charging tube can accurately accommodate the target injection volume of gas, achieving precise control of the injection volume of contrast gas, thereby improving the accuracy and controllability of CO2 angiography.

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

[0063] When carbon dioxide contrast imaging is needed, the operator first rotates the filling valve to make the injection tube communicate with the access tube, and then fills carbon dioxide into the filling tube by using the injection assembly and the injection tube. After the filling of carbon dioxide is completed, the spring is compressed to the first length, and at this time, the volume of the chamber formed between the piston and the filling tube for storing carbon dioxide is the target injection volume. When injection is performed, the filling valve is rotated to make the access tube communicate with the external injection device, and the carbon dioxide in the filling tube can be injected into the patient's body under the pressure of the spring deformation, so that the patient can finally 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 on this basis, and then the flow rate of the carbon dioxide can be obtained, so that the initial injection speed can be determined according to the cross-sectional area of the injection pipeline.

[0065] That is, as shown in FIG. 2, based on the target injection volume and the cross-sectional area of the filling tube, 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 volume and the cross-sectional area of the filling tube, the storage position of the carbon dioxide gas in the filling tube 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 filling tube, the target pressure difference generated by the spring on the carbon dioxide in the filling tube 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 volume V tar and the cross-sectional area A of the filling tube are determined first, and the position of the volume of carbon dioxide to be filled in the filling tube (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 that the length of the spring can be determined, i.e. 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, i.e. F=kx, k is the elastic coefficient of the spring. According to Bernoulli's equation and the flow equation, the gas flow rate v and the pressure difference ΔP satisfy the following fluid mechanics equation:

[0073] wherein p is the density of the gas, v is the gas flow rate, and ΔP is the pressure difference between the pressure received by the carbon dioxide in the filling tube and the pressure at the injection point.

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

[0075] By bringing the formula of the pressure difference into the equation of fluid mechanics, we get:

[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 p 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, determining a second length of the spring 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 this 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 the injection speed is increased by increasing the deformation degree of the spring and 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 based on 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 embodiment, the second length of the spring at the target injection speed can be accurately obtained according to the original length, the first length and the initial injection speed, so that the injection speed can meet the requirements.

[0086] In step 140, before the chamber for storing carbon dioxide formed between one end of the filling tube and the piston is filled with carbon dioxide, the spring is pre-compressed from the first length to the second length.

[0087] Before the chamber for storing carbon dioxide 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 the spring is fixed at a position corresponding to the second length, so that the required initial pressure in the chamber before filling can be 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 required initial pressure is maintained in the chamber before injection, thereby ensuring the stability and accuracy of the injection process.

[0090] Releasing the free end of the spring can allow the spring to generate sufficient pressure to quickly 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 accurately controllable, so that 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 equipment, which is beneficial to the use and mastery of the operator.

[0093] [According to Rule 91, corrected on 03.12.2025] According to the carbon dioxide contrast injection control method provided by the embodiment, 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 the injection speed and injection amount can be accurately controlled, which meets the injection requirements in different situations, improves the accuracy and controllability of CO2 angiography, increases the injection speed, shortens the injection time, thereby improving the efficiency and speed of the contrast process, fully utilizes the spring in the existing structure, and does not need to additionally set a pressurizing device, etc., reducing the modification and cost of the equipment.

[0094] In some embodiments, a baffle is arranged in the charging pipe near one end of the spring, and a pull rod for adjusting the position of the baffle is fixed on the baffle, and the pull rod extends out of the charging pipe from the end of the charging pipe 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 charging pipe 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 when the volume of the chamber between the baffle and the charging pipe is the target injection amount, the baffle is fixed, and at this time the spring is compressed to the first length under the action of the baffle. Then, carbon dioxide gas can be input into the charging pipe for storage.

[0096] Specifically, carbon dioxide gas can be input from a carbon dioxide gas source into the chamber between the baffle and the charging pipe through the injection port. During the input of the carbon dioxide gas, the piston is gradually moved towards the baffle by 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 end of the spring away from the injection port can be further compressed until the spring is compressed to the second length.

[0097] It can be understood that, as shown in FIG. 3, the spring 310 is fixedly connected with a baffle 330 near one end of the piston 320, and a pull rod 340 for adjusting the position of the baffle 330 is fixed on the baffle 330, and the pull rod 340 can extend out of the end of the charging pipe 350 fixedly connected with the spring 310, so as not to affect the airtightness of the chamber 360 between the piston 320 and the charging pipe 350, and also facilitate the adjustment of the compression degree of the spring 310. This design can realize the pre-compression of 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 arranged on the inner wall of the charging pipe for marking different spring lengths, and the end of the pull rod extending out of the charging pipe 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 realize accurate adjustment of the injection speed.

[0099] For example, a series of equidistant scales can be uniformly arranged on the inner wall of the charging pipe, for example, a scale is arranged every 1 millimeter or 0.5 millimeter. And a locking device is arranged on the end of the pull rod extending out of the charging pipe to fix the pull rod, for example, a clamp or buckle can be arranged 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 the spring length control and injection speed adjustment need to be more accurate.

[0100] For example, the scale can be set according to the change rule of the spring length, and the scale can be set to be non-equidistant. For example, the scale can be set to be dense in the region where the spring compression degree is small, and the scale can be set to be sparse in the region where the spring compression degree is large. In this way, the injection speed can be adjusted more conveniently.

[0101] In some embodiments, the spring 310 is fixedly connected to the piston 320 at one end close to the piston 320, and the baffle 330 is arranged in the spring 310. In this case, the cross-sectional size of the baffle 330 is small, and the baffle 330 can move in the spring 310. The movement of the baffle 330 does not affect 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 the end of the spring 310 fixed to the filling pipe 350. In this way, the airtightness of the chamber 360 between the piston 320 and the filling pipe 350 is not affected, and the compression degree of the spring 310 can be adjusted conveniently.

[0103] In this case, the baffle is fixedly connected with a pull rod for adjusting the position of the baffle. The pull rod extends from the end of the filling pipe away from the injection port. 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 the 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. During the process of continuously inputting carbon dioxide into the chamber, the piston is fixed under the action of the baffle.

[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. 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 this time, the chamber is filled with the target injection amount of carbon dioxide gas. On this basis, the end of the spring away from the injection port can be further compressed. The end of the spring fixed to 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 end of the filling pipe away from the piston is provided with a driving member, and the end of the spring away from the injection port is fixedly connected to the driving end of the driving member. The end of the spring away from the injection port is compressed by the driving member until the spring is compressed to the second length.

[0107] It can be understood that the drive member is arranged in the end of the filling tube fixed with the spring, and the end of the spring fixed with the piston is fixedly connected with the driving end of the drive member.

[0108] In some embodiments, the drive 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 filling tube 350 from the end of the filling 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 wall surface of the filling tube through which the adjusting rod extends out of the filling tube can be provided with a threaded rod matched with the adjusting rod, so that the adjusting rod can also 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 filling tube, and the fixing mode of the adjusting rod is not limited here.

[0111] Alternatively, the drive 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 filling tube also needs to be provided with a power supply to supply power to the drive member. The outside of the filling tube can be provided with a button to adjust the driving distance of the drive 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 filling tube, for example, on the side or top of the filling tube, so that the operator can conveniently use the button. 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 present embodiment, the spring is driven by the drive 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 provided by the present application is described below, and the carbon dioxide contrast injection device control 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 provided by the embodiment of the present application mainly comprises 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 amount of 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 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;

[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 on the basis of the first length before charging the chamber formed between one end of the charging pipe and the piston with carbon dioxide; the second length is the length of the spring when the charging pipe is used for carbon dioxide contrast injection.

[0122] [Corrected according to Rule 91 on 03.12.2025] The carbon dioxide contrast injection device control device provided by the embodiment of the present application determines the second length of the spring through the target injection speed, the initial injection speed and the first length, determines the pre-compression degree of the spring on the basis of the accurate control of the contrast injection amount, and then accurately controls the injection speed and the injection amount, meets the injection requirements in different situations, improves the accuracy and controllability of CO2 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, etc., reduces the modification and cost of the equipment.

[0123] The embodiment of the present application also provides a contrast injection syringe, which comprises a charging pipe for storing and charging carbon dioxide, a piston and a spring arranged in the charging pipe for adjusting the volume of the charging pipe, a chamber for storing carbon dioxide formed between one end of the charging pipe and the piston, and the spring arranged at the other end of the charging pipe; the 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 charging pipe from the end of the charging pipe far from the injection port; the end of the charging 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 contrast injection syringe uses the above-mentioned carbon dioxide contrast injection syringe control method to control the baffle and the driving member before the 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 end of the spring far from the injection port, and the other end of the adjusting rod extends out of the charging pipe from the end of the charging pipe far from the injection port; or the driving member is a motor, and the driving end of the motor is fixedly connected with the end of the spring far from the injection port.

[0125] [Corrected according to Rule 91 on 03.12.2025]Fig. 6 shows a schematic diagram of the physical structure 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 communication bus 640, wherein the processor 610, the communications interface 620, the memory 630 complete the communication among each other through the communication bus 640. The processor 610 can call the logical instructions in the memory 630 to execute the carbon dioxide contrast injection syringe control method, which comprises: obtaining the target injection speed and the target injection amount of the contrast; determining the first length of the spring and the 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, the second length of the spring is determined based on the target injection speed, the initial injection speed and the first length; the spring is pre-compressed to the second length on the basis of the first length before the chamber formed between one end of the charging pipe and the piston is charged with carbon dioxide; the second length is the length of the spring when the charging pipe is used for carbon dioxide contrast injection.

[0126] [Corrected according to Rule 91 on 03.12.2025] In addition, the logical 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 when used, and 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 to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in various embodiments of the present application. The foregoing storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk, and various program code storage media.

[0127] In another aspect, the present application also provides a computer program product, the computer program product comprising a computer program, the computer program being stored on a non-transitory computer readable storage medium, and the computer program being executable by a processor to cause a computer to perform the carbon dioxide contrast injection device control method provided by the above-mentioned methods, 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 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 amount; 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 is used for carbon dioxide contrast injection.

[0128] In yet another aspect, the present application also provides a non-transitory computer readable storage medium having stored thereon a computer program, which, when executed by a processor, implements the method for controlling a carbon dioxide contrast injector provided by any of the above methods. The method includes: obtaining a target injection speed and a target injection volume of the contrast; determining 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 charging tube; the first length being a length of the spring when a volume of a chamber between one end of the charging tube and the 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 one end of the charging tube and the piston with carbon dioxide; the second length being a length of the spring when the charging tube is used for 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 shown as units can or can not be physical units, i.e., can be located in one place or distributed on multiple network units. Part or all of the modules can be selected to achieve the purpose of the embodiment according to actual needs. Those skilled in the art can understand and implement without creative labor.

[0130] From the above description of the embodiments, those skilled in the art can clearly understand that the embodiments can be implemented by means of software and necessary universal hardware platforms, and of course can also be implemented by hardware. Based on such understanding, the above technical solutions can be embodied in the form of a software product, which can be stored in a computer readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes a plurality of instructions for causing a computer device (which can be a personal computer, server, or network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0131] Finally, it should be noted that: the above embodiments 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 embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements to some 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 of controlling a carbon dioxide contrast injector, characterized by, The contrast injection device comprises a charging pipe for storing and charging carbon dioxide, a piston and a spring are arranged in the charging pipe for adjusting the volume of the charging pipe, a chamber for storing carbon dioxide is formed between one end of the charging pipe and the piston, the other end of the charging pipe is provided with a spring, the spring pushes the piston to move when deformed, and the method comprises: Obtaining a target injection speed and a target injection amount of the contrast; Based on the target injection amount and the cross-sectional area of the charging pipe, 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 the 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, the second length of the spring is determined based on the target injection speed, the initial injection speed and the first length; Before charging carbon dioxide into the chamber for storing carbon dioxide between the one end of the charging 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 charging pipe performs carbon dioxide contrast injection.

2. The carbon dioxide contrast injector control method of claim 1, wherein, The method comprises: Based on the target injection amount and the cross-sectional area of the charging pipe, the storage position of the carbon dioxide gas in the charging pipe is determined; Based on the storage position of the carbon dioxide, the first length of the spring is determined; Based on the first length of the spring, the spring constant of the spring and the cross-sectional area of the charging pipe, the target pressure difference generated by the spring on the carbon dioxide in the charging pipe is obtained; 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 of claim 1, wherein, The second length of the spring is determined by the following equation: 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.

4. The carbon dioxide contrast injector control method of any one of claims 1-3, wherein, A baffle is arranged in the charging pipe near the end of the spring close to the piston, a pull rod for adjusting the position of the baffle is fixed on the baffle, and the pull rod extends out of the charging pipe from the end of the charging pipe away from the injection port; The method comprises: The baffle is moved away from the injection port by the pull rod until the volume of the chamber between the baffle and the charging pipe is the target injection amount, and the baffle is fixed; The end of the spring away from the injection port is compressed until the spring is compressed to the second length.

5. The carbon dioxide contrast injector control method of claim 4, wherein, The end of the spring away from the injection port is compressed until the spring is compressed to the second length. The spring is compressed away from the injection port by the driving member until the spring is compressed to the second length.

6. A carbon dioxide contrast injector control apparatus, characterized by, The method comprises: The acquisition module is configured to acquire a target injection speed and a target injection volume of the contrast agent; 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 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; The second processing module is configured to determine a second length of the spring based on the target injection speed, the initial injection speed and the first length if the target injection speed is greater than the initial injection speed; The third processing module 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 agent injection.

7. A contrast injection syringe characterized by, The method comprises the following steps: a filling tube for storing and filling carbon dioxide is provided; a piston and a spring are arranged in the filling tube to adjust a volume of the filling tube; a chamber for storing carbon dioxide is formed between one end of the filling tube and the piston; the other end of the filling tube is provided with a spring; the spring pushes the piston to move when the spring is deformed; a baffle is arranged at one end of the spring close to the piston; a pull rod for adjusting a 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; a driving member is arranged at the end of the filling tube away from the piston; one end of the spring away from the injection port is fixedly connected to a driving end of the driving member; the carbon dioxide contrast agent injector is controlled by the method for controlling a carbon dioxide contrast agent injector according to claim 5 before contrast agent injection to compress the spring to a second length.

8. The contrast media injector of claim 7, wherein, The driving member is an adjusting rod for manual adjustment; one end of the adjusting rod is fixedly connected to one end of the spring away from the injection port; the other end of the adjusting rod extends out of the filling tube from the end of the filling tube away from the injection port. Alternatively, the driving member is an electric motor; a driving end of the electric motor is fixedly connected to one end of the spring away from the injection port.

9. An electronic device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, The processor executes the program to implement the method for controlling a carbon dioxide contrast agent injector according to any one of claims 1 to 5. 10.A non-transitory computer-readable storage medium having stored thereon a computer program, characterized in that, The computer program is executed by the processor to implement the method for controlling a carbon dioxide contrast agent injector according to any one of claims 1 to 5.

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