OCT (Optical Coherence Tomography) automatic injection method

Abstract

The invention relates to the technical field of OCT imaging, and discloses an OCT automatic injection method, an OCT system applied to the OCT automatic injection system and a turbo system, and the method comprises the steps that an injection pump control module of the OCT system generates an injection control instruction and determines operation parameters, or the turbo system generates the injection control instruction and receives the operation parameters of the OCT system; a motor transmission module of the turbo system is connected with an injection pump control module, motor thrust is generated based on an injection control instruction and operation parameters, the motor thrust is applied to an injector through an injection module, and a medium in the injector is injected into a blood vessel; and an imaging control module of the OCT system synchronously controls an imaging device to perform OCT scanning on the blood vessel in the injection process so as to obtain an OCT image. Cooperative interaction control between the OCT system and the turbo system can be achieved, OCT scanning is synchronously completed in the injection process, and it is ensured that the injection speed and dosage are accurate and controllable.

Description

Technical Field

[0001] This invention relates to the field of OCT imaging technology, and more specifically to an automatic OCT injection method. Background Technology

[0002] In the field of coronary intervention, optical coherence tomography (OCT) technology, with its high-resolution imaging capabilities, has become a key tool for assessing vascular lesions and guiding stent placement. The core requirement of OCT imaging is to temporarily remove blood from the blood vessel by injecting contrast agent to obtain clear images of the vessel wall and lumen microstructure. Therefore, the accuracy of contrast agent injection and its synergy with OCT scanning directly determine the imaging quality and the accuracy of subsequent diagnosis.

[0003] Traditional clinical procedures require two medical staff to work together: one to operate the OCT catheter and the other to manually inject the contrast agent. The synchronization of their actions is highly dependent on experience, which can easily lead to a mismatch between the timing of image acquisition and the filling of the contrast agent. As a result, about 40% of OCT data are affected by poor flushing, which affects the diagnosis. In addition, the two-person operation increases labor costs and operation time.

[0004] Most existing electric infusion pumps are independent devices, lacking stable signal interaction and collaborative control mechanisms with the OCT system. Operators need to focus on both operations simultaneously, which not only increases the burden on the surgical team, but also makes the fixed injection parameters lack clinical adaptability. This can easily lead to insufficient vascular filling due to insufficient pressure, or the risk of contrast agent extravasation due to excessive pressure. Summary of the Invention

[0005] This invention provides an automatic OCT injection method to solve the problem of the inability to coordinate the control of the injection pump and the OCT system.

[0006] In a first aspect, the present invention provides an automatic OCT injection method, applied to an OCT automatic injection system. The OCT automatic injection system further includes a recharge system connected to the OCT system. The OCT system includes an imaging control module and an injection pump control module. The mechanical structure of the recharge system includes a motor drive module, an injection module, and a syringe. The motor drive module is connected to the injection pump control module. The method includes: the injection pump control module generating injection control commands and determining operating parameters; the injection pump control module transmitting the injection control commands and operating parameters to the recharge system; the motor drive module generating motor thrust based on the injection control commands and operating parameters, and applying the motor thrust to the syringe through the injection module to inject the medium in the syringe into the blood vessel; the imaging control module simultaneously controlling the imaging device to perform OCT scanning of the blood vessel during the injection process to obtain an OCT image.

[0007] The OCT automatic injection method provided by this invention, through direct connection between the OCT system and the RuiChong system, enables precise and real-time transmission of injection control commands and operating parameters from the OCT system to the RuiChong system, significantly improving the coordination and consistency between the injection action and the OCT scan. The imaging control module simultaneously completes the OCT scan during the injection process, acquiring real-time image data of the intravascular media filling status and blood removal, providing direct evidence for immediate judgment of the injection effect and avoiding image invalidity or media waste caused by asynchronous injection and scanning. The RuiChong system's dedicated mechanical structure is deeply adapted to the OCT system control module, ensuring precise control of injection speed and dosage, reducing operational errors from manual injection and the insufficient compatibility of traditional universal injection pumps. This reduces waste of contrast agents and other media, improves the safety and reliability of clinical operations, reduces reliance on operator experience, and enhances operational convenience and process efficiency.

[0008] In some optional implementations, the OCT system is configured with an operating interface, which includes a catheter connection sub-interface and a real-time scanning sub-interface. The real-time scanning sub-interface integrates an image display area corresponding to the imaging control module and a parameter setting area and an operation control area corresponding to the infusion pump control module. The infusion pump control module determines the operating parameters, including: when the OCT system is powered on, it enters the catheter connection sub-interface and detects the connection status with the RuiChong system, and displays the connection status in both the catheter connection sub-interface and the real-time scanning sub-interface; when the connection is successful, the OCT system enters the real-time scanning sub-interface, and when it detects that the stop scanning button and the RuiChong button are selected, it acquires the operating parameters set in the parameter setting area, and when it detects that the confirmation setting button in the parameter setting area is selected, it sends the operating parameters to the motor drive module. The operating parameters include at least: fuming dose, maximum pull-back injection speed, minimum pull-back injection speed, limited pressure, and manual injection speed.

[0009] This invention, by setting up an operating interface for the OCT system, ensures that the surgeon can intuitively understand the connection status between the OCT and the Ruichong system during initialization and the entire scanning process. This allows for timely troubleshooting of connection anomalies and prevents unnoticed connection failures from causing injection commands to fail or coordination misalignment, significantly improving system reliability and surgical safety. Simultaneously, the parameter setting area centrally integrates key operating parameters such as smoke dose and dual injection speed. Once confirmed, these parameters are directly synchronized to the motor drive module, eliminating the need for manual parameter transfer between the OCT system and the injection device. This ensures that the injection action is strictly executed according to preset parameters, improving the accuracy of injection dosage and speed while reducing the surgeon's distraction.

[0010] In some optional implementations, the operation control area is equipped with a smoke test button and a pull-back start button; the injection pump control module generates injection control commands, including: after detecting that the smoke test button or pull-back start button is selected, generating a smoke injection command or a pull-back injection command, and sending the smoke injection command or pull-back injection command to the motor drive module, which performs a smoke injection based on the smoke injection command, according to the smoke dose, the maximum pull-back injection speed, and the minimum pull-back injection speed, or performs a pull-back injection based on the pull-back injection command, according to the maximum pull-back injection speed and the minimum pull-back injection speed; the imaging control module synchronously controls the imaging device to perform OCT scanning of the blood vessels, acquire OCT images, and perform smoke detection or pull-back detection based on the OCT images; after successful smoke detection or pull-back detection, the OCT system generates a stop injection command and sends the stop injection command to the motor drive module, which then stops the injection.

[0011] This invention integrates operation and control functions into the real-time scanning sub-interface of the OCT system by setting up the operating interface. The corresponding injection command can be directly triggered through the independent smoke test button and pull-back start button on the OCT system's operating interface. After the button is triggered, the injection command and imaging control are started synchronously. While the motor drive module executes the injection according to preset parameters, the imaging control module acquires OCT images in real time and completes the detection. This completely solves the problems of asynchronous injection and scanning and detection lagging behind injection in the operation of traditional independent equipment, and avoids invalid images or waste of contrast agent due to timing misalignment.

[0012] In one optional implementation, the operation control area is further provided with a reset button, and the method further includes: after detecting that the reset button is selected, generating a suction command and sending the suction command to the motor drive module, so that the motor drive module draws the medium into the syringe at a preset speed until the preset capacity is reached and then stops drawing.

[0013] This invention integrates the syringe aspiration and reset action into the reset button in the operation control area, enabling convenient one-click syringe reset. Operators do not need to manually operate the syringe or switch settings between multiple devices; a single button selection triggers the complete aspiration and reset process, replacing the traditional cumbersome manual reset or step-by-step operation mode. This significantly simplifies the reset procedure in clinical workflow, reduces the number of operation steps, and improves the continuity and efficiency of the surgical process.

[0014] Secondly, this invention provides an automatic OCT injection method applied to a refill system within an automatic OCT injection system. The automatic OCT injection system also includes an OCT system connected to the refill system. The OCT system includes an imaging control module and an injection pump control module. The mechanical structure of the refill system includes a motor drive module, an injection module, and a syringe. The motor drive module is connected to the injection pump control module. The method includes: the motor drive module acquiring operating parameters; the motor drive module generating injection control commands and generating motor thrust based on the injection control commands and operating parameters, and applying the motor thrust to the syringe through the injection module to inject the medium in the syringe into the blood vessel; the motor drive module simultaneously generating imaging control commands and transmitting the imaging control commands to the imaging control module through the injection pump control module, so that the imaging control module synchronously controls the imaging device to perform OCT scanning of the blood vessel according to the imaging control commands during the injection process to obtain an OCT image.

[0015] The OCT automatic injection method provided by this invention, through direct connection between the OCT system and the RuiChong system, can acquire accurate and real-time transmitted operating parameters from the OCT system based on the RuiChong system, and generate injection control commands from the RuiChong system, thereby realizing injection control at the RuiChong system end, and simultaneously generating imaging control commands. The imaging control module completes OCT scanning simultaneously during the injection process, which greatly improves the coordination and consistency between the injection action and the OCT scan, and can acquire image data of the intravascular media filling status and blood removal status in real time, providing direct evidence for immediate judgment of the injection effect, avoiding invalid images or media waste caused by asynchronous injection and scanning. The RuiChong system controls the injection based on the operating parameters set by the OCT system, which can ensure the precise controllability of injection speed and dosage, reduce the operational errors of manual injection and the insufficient compatibility of traditional universal injection pumps, reduce the waste of contrast agents and other media, improve the safety and reliability of clinical operation, reduce the dependence on operator experience, and improve the convenience and efficiency of operation.

[0016] In one optional implementation, the operating parameters include at least: fuming dose, maximum pull-back injection speed, minimum pull-back injection speed, limited pressure, and manual injection speed. The mechanical structure of the RuiChong system also includes: a protective housing, on which are provided a fuming injection button, a pull-back injection button, a connection status indicator, and a RuiChong operating status indicator. The connection status indicator is used to show the connection status between the OCT system and the RuiChong system, and the RuiChong operating status indicator is used to show the operating status of the RuiChong system. The motor drive module generates injection control commands and generates motor thrust based on the injection control commands and operating parameters. The motor thrust is applied to the syringe through the injection module to push the medium in the syringe into the blood vessel, including: when the OCT system and the RuiChong system are successfully connected, the RuiChong system detects the fuming injection button... After the button or pull-back injection button is selected, the RuiChong system generates a smoke injection command or a pull-back injection command. Based on the smoke injection command, the motor drive module performs a smoke injection according to the smoke dose, the maximum pull-back injection speed, and the minimum pull-back injection speed, or based on the pull-back injection command, performs a pull-back injection according to the maximum pull-back injection speed and the minimum pull-back injection speed. The RuiChong system sends an imaging control command to the imaging control module so that the imaging control module synchronously controls the imaging device to perform OCT scanning on the blood vessel, acquire OCT images, and perform smoke detection or pull-back detection based on the OCT images. After the imaging control module determines that the smoke detection is successful or the pull-back is completed based on the OCT images, the motor drive module receives a stop injection command from the OCT system and stops the injection according to the stop injection command.

[0017] This invention, by setting a smoke injection button and a pull-back injection button on the protective shell of the RuiChong system, can construct a dual-trigger operation mode, realizing bidirectional interaction between the OCT system and the RuiChong system. This significantly improves the flexibility of clinical operation. Surgeons can directly press the physical button to start the injection at the operation position close to the RuiChong system according to the needs of the surgical scenario, without having to go back and forth to the OCT host interface. It is especially suitable for scenarios where surgeons need to closely monitor the injection status during surgery, reducing operation lines and improving the efficiency of the surgical procedure.

[0018] This invention enables precise closed-loop control of the injection action through smoke detection and pull-back detection, eliminating the need for the surgeon to continuously monitor and manually stop the injection process. This allows the surgeon to focus on core diagnostic and treatment procedures, further improving the efficiency and ease of operation of the surgical procedure. It also ensures that the contrast agent is used only when necessary, significantly reducing contrast agent waste, while guaranteeing the stability of imaging quality and avoiding overfilling that could interfere with diagnosis.

[0019] In one optional implementation, the pull-back injection is performed according to the maximum pull-back injection speed and the minimum pull-back injection speed, including: acquiring a first pull-back injection speed determined by the OCT system based on the OCT image between the maximum pull-back injection speed and the minimum pull-back injection speed; the motor drive module generates a corresponding motor thrust according to the first pull-back injection speed to push the medium into the blood vessel at the first pull-back injection speed; when the imaging control module synchronously controls the imaging device to perform OCT scanning on the blood vessel, acquires an OCT image, and after detecting that the flushing effect meets the preset requirements based on the OCT image, it acquires a pull-back command generated by the infusion pump control module; after receiving the pull-back command, it acquires a second pull-back injection speed determined by the OCT system based on the OCT image between the maximum pull-back injection speed and the minimum pull-back injection speed; the motor drive module generates a corresponding motor thrust according to the second pull-back injection speed to push the medium into the blood vessel at the second pull-back injection speed.

[0020] This invention dynamically adjusts the injection speed during the pullback injection process, which can fully remove blood from the blood vessels and fill the lumen before the pullback is triggered, thus clearing the field of view for the pullback scan. After the flushing effect meets the standard, it adapts to the movement rhythm of the pullback scan, avoiding excessive waste of contrast agent due to excessive speed or blood backflow interfering with imaging due to excessive speed, thus ensuring a clear field of view throughout the scan.

[0021] In one optional embodiment, the protective shell further includes: a manual injection button, a manual aspiration button, and an emergency stop button. The method further includes: after detecting that the manual injection button is pressed and held, the motor drive module performs manual injection based on the manual injection speed, and stops manual injection after detecting that the long press has stopped; after detecting that the manual aspiration button is pressed and held, the motor drive module aspirates medium into the syringe at a preset speed until a preset volume is reached and then stops aspiration, or stops aspiration after detecting that the long press has stopped; and stops the injection action after detecting that the emergency stop button is selected.

[0022] This invention, by constructing an automatic and manual dual-mode operation system, significantly improves the adaptability to clinical scenarios and addresses special situations such as automatic mode malfunctions and sudden vascular conditions. Operators can quickly switch operation modes without interrupting the surgical procedure, enhancing the system's clinical fault tolerance and practicality. Simultaneously, the emergency stop button serves as a backup measure, rapidly terminating the injection process if the risk has not subsided after an alarm or if a serious abnormality occurs. This forms a closed-loop protection system of predictive warning and immediate termination, completely avoiding serious clinical risks such as contrast agent extravasation, vascular intima damage, and rupture caused by excessive injection pressure, thus significantly improving the safety of surgical procedures.

[0023] In one alternative embodiment, the protective housing further includes a speed lever, and the method further includes: after detecting that the speed lever has been operated, acquiring the current injection speed of the motor drive module, and adjusting the current injection speed based on the operation signal of the speed lever.

[0024] This invention, by setting a speed lever, enables manual speed adjustment when the Ruichong system injects at a set speed, thereby further meeting operational requirements.

[0025] In one optional implementation, the mechanical structure of the Ruichong system further includes a syringe fixing module and a locking status indicator; the syringe fixing module is used to fix the syringe so that the injection end of the syringe is higher than the injection end of the syringe, and the injection end is connected to the injection module, while the injection end is connected to the catheter of the OCT system; the locking status indicator is used to show the locking status of the syringe fixing module on the syringe.

[0026] This invention, by fixing the syringe to a ramp structure, effectively prevents gas from mixing in or being suddenly injected when the syringe pushes the medium into the catheter, thereby preventing air from entering the body and improving operational safety. Attached Figure Description

[0027] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0028] Figure 1 This is a structural block diagram of the OCT automatic injection system according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the first type of OCT automatic injection method according to an embodiment of the present invention; Figure 3 This is a residual blood OCT image of the OCT automatic injection method according to an embodiment of the present invention; Figure 4 These are clear OCT images of the OCT automatic injection method according to embodiments of the present invention; Figure 5 This is a schematic diagram of the smoke detection failure interface of the OCT automatic injection method according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the smoke detection failure interface of the OCT automatic injection method according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the pullback detection interface of the OCT automatic injection method according to an embodiment of the present invention; Figure 8 This is a schematic diagram of a second process of the OCT automatic injection method according to an embodiment of the present invention; Figure 9 This is a schematic diagram of the mechanical structure of the refill system of the OCT automatic injection method according to an embodiment of the present invention; Figure 10 This is a schematic diagram comparing the performance of different injection methods of the OCT automatic injection method according to an embodiment of the present invention; Figure 11 This is a schematic diagram comparing the image quality of different injection methods under the ex vivo porcine heart test mode of the OCT automatic injection method according to an embodiment of the present invention; Figure 12 This is a schematic diagram comparing the image quality of different injection methods in an animal experiment using the OCT automated injection method according to an embodiment of the present invention.

[0029] Explanation of reference numerals in the attached figures: 1-Automatic injection system; 10-OCT system; 101-Imaging control module; 102-Pump control module; 20-Re-emphasis system; 201-Motor drive module; 202-Injection module; 203-Instrument. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] It is understood that before using the technical solutions disclosed in the various embodiments of the present invention, users should be informed of the types, scope of use, and usage scenarios of the personal information involved in the present invention and their authorization should be obtained in accordance with relevant laws and regulations through appropriate means.

[0032] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0033] Currently, clinical OCT imaging requires two operators to work together: one operates the OCT catheter, and the other manually injects the contrast agent. This method is labor-intensive, requiring additional operators; manual injection makes it difficult to maintain a constant flow rate and pressure, resulting in unstable image quality; and manual operation introduces delays, which may lead to waste of contrast agent or repeated injections.

[0034] In related technologies, high-pressure injection pumps with preset flow rates and pressures are used to replace manual injection. In this method, the injection pump operates independently and has no signal interaction with the OCT equipment, still requiring the surgeon to operate it at a distance, increasing the burden on the surgical team. Furthermore, the fixed parameters lack adaptability, making it impossible to adjust the injection parameters in real time according to factors such as vessel diameter and lesion location. This leads to failure in some cases due to insufficient pressure (inadequate vessel filling) or excessive pressure (risk of contrast agent extravasation).

[0035] Therefore, this invention provides an OCT automatic injection system that achieves closed-loop control and dynamic optimization of injection parameters through bidirectional interaction between the OCT system and the Ruichong system. Figure 1 This is a structural block diagram of the OCT automatic injection system according to an embodiment of the present invention, as shown below. Figure 1 As shown, the OCT automatic injection system 1 includes: an OCT system 10 and a refill system 20 connected by wired or wireless means; the OCT system 10 includes: an imaging control module 101 and an injection pump control module 102, the injection pump control module 102 being used to generate injection control commands and determine operating parameters; the mechanical structure of the refill system 20 includes: a motor drive module 201, an injection module 202 and a syringe 203, the motor drive module 201 being connected to the injection pump control module 102, being used to generate motor thrust based on the injection control commands and operating parameters, and applying the motor thrust to the syringe 203 through the injection module 202, thus injecting the medium in the syringe 203 into the blood vessel; the imaging control module 101 is used to simultaneously control the imaging device to perform OCT scanning of the blood vessel during the injection process to obtain OCT images.

[0036] Furthermore, the embodiments of the present invention are not limited to OCT systems. As long as they follow the communication protocol of Ruichong, the operating systems can be interconnected, such as the operating systems of interventional products like CLA (laser ablation), AIPCI (AI-assisted percutaneous coronary intervention), IVUS, and angiography.

[0037] According to an embodiment of the present invention, an embodiment of an OCT automatic injection method is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0038] This embodiment provides an automatic OCT injection method, which can be used in the aforementioned OCT system. Figure 2 This is a flowchart of the OCT automatic injection method according to an embodiment of the present invention, as follows: Figure 2 As shown, the process includes the following steps: In step S201, the infusion pump control module generates injection control commands and determines operating parameters.

[0039] Specifically, in this embodiment of the invention, the OCT system 10 is responsible for imaging control and high-level command generation. Its host software integrates an infusion pump control module 102, thereby enabling functions such as parameter setting, smoke detection, and pull-back detection. Doctors can directly set key operating parameters on the OCT system 10's interface, including at least: smoke dose, maximum pull-back injection speed, minimum pull-back injection speed, limited pressure, and manual injection speed.

[0040] For example, the operating interface configured in the OCT system 10 includes a catheter connection sub-interface and a real-time scanning sub-interface. The real-time scanning sub-interface integrates an image display area corresponding to the imaging control module, and a parameter setting area and operation control area corresponding to the infusion pump control module. Before performing OCT imaging, the operator connects the RuiChong system 20 to the OCT system 10 via a signal cable. When the OCT system 10 is powered on, it first enters the catheter connection sub-interface and detects the connection status with the RuiChong system, displaying the connection status on both the catheter connection sub-interface and the real-time scanning sub-interface. If the connection is successful, a blue RuiChong icon is displayed above the catheter connection sub-interface and the real-time scanning sub-interface, and the connection status indicator light on the protective shell of the corresponding RuiChong system 20 illuminates green. If the connection fails, the power-on interface displays a connection failure message, the RuiChong icon above the catheter connection sub-interface and the real-time scanning sub-interface is grayed out, and the connection status indicator light on the protective shell of the corresponding RuiChong system 20 illuminates green.

[0041] Furthermore, after successful connection, the system enters the real-time scanning sub-interface. When the "Stop Scanning" button on the real-time scanning sub-interface is selected, the imaging control module 101 controls the imaging device to pause scanning. When the "Use Ruichong" button on the real-time scanning sub-interface is selected, the operator can set operating parameters in the parameter setting area according to operational needs. The injection pump control module 102 acquires the operating parameters set in the parameter setting area, and the parameters take effect after the "Confirm Setting" button in the parameter setting area is selected. The activated operating parameters are then sent to the motor drive module 201 of the Ruichong system 20. The operating parameters include at least the aforementioned smoke dose, maximum pull-back injection speed, minimum pull-back injection speed, limited pressure, and manual injection speed. Each time the operator modifies the operating parameters, they must select the "Confirm Setting" button for the parameters to take effect.

[0042] In step S202, the injection pump control module transmits the injection control command and operating parameters to the Ruichong system. The motor drive module generates motor thrust based on the injection control command and operating parameters, and applies the motor thrust to the syringe through the injection module to push the medium in the syringe into the blood vessel.

[0043] Specifically, in this embodiment of the invention, the operation control area of ​​the real-time scanning sub-interface of the OCT system 10 is equipped with a smoke test button and a pull-back start button. After completing parameter settings and other preparations, the operator can click the smoke test button. Upon detecting that the smoke test button is selected, the injection pump control module 102 generates a smoke injection command and sends it to the motor drive module 201. The motor drive module 201 then performs a smoke injection based on the smoke injection command, according to the smoke dose, the maximum pull-back injection speed, and the minimum pull-back injection speed. The specific smoke injection speed is dynamically adjusted by the OCT system 10 based on the blood flushing status summarized from the OCT images scanned during the injection process, and can also be dynamically adjusted by the re-injection system 20 based on the injection pressure. The contrast agent is injected into the blood vessel through a catheter connected to the re-injection system 20, and the re-injection operation status indicator light on the protective shell of the corresponding re-injection system 20 illuminates green.

[0044] In step S203, the imaging control module synchronously controls the imaging device to perform OCT scanning on the blood vessels during the injection process to obtain OCT images.

[0045] Specifically, in this embodiment of the invention, during the fuming injection process of the Ruichong system 20, the imaging control module 101 synchronously controls the imaging device deployed at the distal end of the catheter to perform OCT scanning, thereby acquiring OCT images and performing fuming detection based on the OCT images.

[0046] Furthermore, upon successful smoke detection, the infusion pump control module 102 generates a stop injection command and sends it to the motor drive module 201, which then stops the injection. In the OCT automatic injection system for coronary intervention, smoke detection is a verification step for the effectiveness of the smoke injection action before OCT imaging of the luminal segment. It is also a unique pre-processing detection step for coronary OCT imaging. "Smoke" refers to a small-dose, short-duration contrast agent injection operation, and the corresponding injection effect detection is smoke detection. Its core is to determine the basic flushing and filling effect of the vascular lumen after contrast agent injection through real-time OCT scanning images, ensuring no artifacts caused by blood during subsequent imaging and clearing visual obstacles for subsequent formal pull-back imaging. This is the key detection logic linking the imaging control module 101 and the injection action of the resonant system 20 in this embodiment of the invention.

[0047] Therefore, in this embodiment of the invention, the fuming dose, maximum pull-back injection speed, and minimum pull-back injection speed are set before OCT imaging. At this point, the fuming dose is relatively small, for example, 3 ml. The maximum and minimum pull-back injection speeds can be dynamically adjusted by the OCT system based on the vessel location and size, or set by the operator. During the injection process, the fuming injection speed is determined based on the blood flushing status or injection pressure in the OCT image. The fuming injection speed is between the maximum and minimum pull-back injection speeds, for example, set to 3 ml / s, thereby achieving small-dose, short-time contrast agent injection. During the injection process, the imaging control module 101 continuously controls the imaging device to simultaneously perform OCT scanning on the target vessel segment, acquiring OCT images of the vessel lumen in real time. Furthermore, based on the synchronously acquired OCT images, fuming detection is directly performed to determine the residual blood in the vessel lumen and the initial filling status of the contrast agent, such as... Figure 3 Blood residue is visible, as shown. Figure 4 The image is clearer, which avoids invalid images due to poor field of view when performing formal pull-back imaging directly, thus reducing the waste of contrast agent and rework of surgical procedures.

[0048] In some optional implementations, after smoke detection, the OCT system 10 clearly displays the smoke detection result on the user interface, such as... Figure 5 The smoke detection failed as shown. Figure 6 The smoke detection was successful. After successful smoke detection, the operator can click the pull-back start button. Upon detecting that the pull-back start button is selected, the injection pump control module 102 generates a pull-back injection command and sends it to the motor drive module 201. The motor drive module 201, based on the pull-back injection command, performs the pull-back injection at a speed determined by the OCT system based on the OCT image between the maximum and minimum pull-back injection speeds. The corresponding Richong system 20's protective housing indicator light illuminates green. Simultaneously, the imaging control module 101 acquires the OCT image scanned by the imaging device and performs pull-back detection based on the OCT image.

[0049] During the pullback process, before the pullback is triggered, the OCT system 10 determines a first pullback injection speed based on the OCT image, between the maximum and minimum pullback injection speeds. The motor drive module 201 first generates a corresponding motor thrust according to the first pullback injection speed, so that the medium is injected into the blood vessel at the first pullback injection speed, for example, 3 ml / s. The imaging control module 101 continuously acquires the OCT images scanned by the imaging device and detects the flushing effect based on the OCT images, such as... Figure 7As shown, the OCT imaging results are displayed on the real-time scanning sub-interface. After the flushing effect meets the preset requirements (no blood residue, contrast agent uniformly fills the entire lumen), a pullback command is triggered. After the pullback command is triggered, the OCT system 10 determines a second pullback injection speed based on the OCT image, between the maximum pullback injection speed and the minimum pullback injection speed. The motor drive module 201 generates a corresponding motor thrust according to the second pullback injection speed, so that the medium is injected into the blood vessel at the second pullback injection speed, for example, 1.5 ml / s, thereby adapting to the pullback scanning rhythm and formally entering the pullback imaging stage.

[0050] Furthermore, the OCT pullback is set with a distance limit. When the preset distance is reached, such as 60mm, the pullback is determined to be over. After the pullback is over, the injection pump control module 102 generates a stop injection command and sends the stop injection command to the motor drive module 201. The motor drive module stops injection and ends the pullback.

[0051] As can be seen, the criteria for determining the pullback detection are divided into two core levels: First, the flushing effect meets the standard, triggering the speed switch. When there is no blood residue in the lumen of the target vessel segment, the contrast agent achieves uniform filling of the entire lumen, and the microstructure of the vessel wall (such as the intima and plaque) can be clearly identified through OCT images, without any uneven filling or local obstruction of the contrast agent, the field of view requirements for formal OCT pullback imaging are fully met. Second, the pullback process ends, triggering the cessation of injection. The core basis for this is that the OCT scanning probe completes the pullback movement of the preset target vessel segment, the scanned image completely covers the vessel area to be diagnosed, and the entire field of view meets the above flushing effect standards, with no invalid imaging segments, and there is no need to continue injecting contrast agent to maintain the field of view.

[0052] In some optional implementations, the operation control area is also provided with a reset button. When the reset button is detected to be selected, a suction command is generated and sent to the motor drive module so that the motor drive module can draw the medium into the syringe at a preset speed until the preset capacity is reached and then stop the suction.

[0053] For example, if the operator detects insufficient contrast agent in the syringe during the OCT imaging stage, they can select the reset button, and the Ruichong system 20 will automatically aspirate at 4ml / s; press and hold to stop, and aspiration will stop; when 12ml is aspirated, aspiration will automatically stop, thus automatically completing the aspiration of contrast agent, filling the syringe, ensuring continuous availability of contrast agent, and reducing intraoperative interruptions.

[0054] In summary, operators can control the Ruichong system 20 with a single click through the OCT system 10's interface, eliminating the need for waiting during the imaging process, avoiding coordination errors, and reducing the amount of contrast agent used.

[0055] The OCT automatic injection method provided by this invention, through direct connection between the OCT system and the RuiChong system, enables precise and real-time transmission of injection control commands and operating parameters from the OCT system to the RuiChong system, significantly improving the coordination and consistency between the injection action and the OCT scan. The imaging control module simultaneously completes the OCT scan during the injection process, acquiring real-time image data of the intravascular media filling status and blood removal, providing direct evidence for immediate judgment of the injection effect and avoiding image invalidity or media waste caused by asynchronous injection and scanning. The RuiChong system's dedicated mechanical structure is deeply adapted to the OCT system control module, ensuring precise control of injection speed and dosage, reducing operational errors from manual injection and the insufficient compatibility of traditional universal injection pumps. This reduces waste of contrast agents and other media, improves the safety and reliability of clinical operations, reduces reliance on operator experience, and enhances operational convenience and process efficiency.

[0056] This embodiment provides an OCT automatic injection method, which can be used in the aforementioned Ruichong system. Figure 8 This is a flowchart of the OCT automatic injection method according to an embodiment of the present invention, as follows: Figure 8 As shown, the process includes the following steps: Step S801: The motor drive module acquires operating parameters.

[0057] Specifically, in this embodiment of the invention, the mechanical structure of the injection pump corresponding to the RuiChong system 20 is compactly designed and optimized for precision: the mechanical structure mainly consists of a motor drive module 201, an injection module 202, and a syringe 203. The motor drive module 201 mainly includes a motor fixing structure and a lead screw drive structure, and its main function is to provide injection force to the push rod. The injection module 202 mainly includes a push rod, a push rod seat, and a push rod fixing structure, and its main function is to transmit the motor's thrust to the syringe 203. During the smoking or pull-back injection process, the injection speed of the motor drive module 201 completes the injection according to the operating parameters set by the operator. These operating parameters are set by the operator on the operating interface of the OCT system 10 and sent to the connected RuiChong system 20 after confirmation. The syringe can be a ring-handle syringe, and there are no restrictions on its use.

[0058] In step S802, the motor drive module generates injection control commands and generates motor thrust based on the injection control commands and operating parameters. The motor thrust is then applied to the syringe through the injection module to push the medium in the syringe into the blood vessel.

[0059] Specifically, in this embodiment of the invention, the mechanical structure of the Ruichong system 20 further includes a protective housing. The protective housing is the outer casing of the device, primarily serving functions such as waterproofing, dustproofing, electrical isolation, aesthetics, and human-machine interaction. The protective housing features a compact layout: a layered housing design with a main frame made of aviation-grade aluminum, supporting quick assembly and disassembly; a non-slip handle design with a silicone textured surface and a friction coefficient ≥0.8 (this is merely an example and not a limitation). The protective housing 204 has a high-precision pressure sensing structure: a miniature strain gauge pressure sensor is embedded in the bearing seat at the end of the lead screw, directly measuring the axial force of the push, eliminating the lever effect error of traditional lateral installation; a shock-absorbing silicone pad (damping coefficient 0.3) is added to suppress motor vibration interference. The protective housing has a durability-enhancing design: a mechanical limit stop (capable of withstanding an impact force of 200N) is provided at the end of the lead screw to prevent overload; key circuit boards are coated with conformal coating for sealing protection.

[0060] The protective housing has two physical buttons: a smoke injection button and a pull-back injection button. Therefore, the operator can use the buttons provided by the OCT system 10's operating interface to achieve the coordinated operation of OCT scanning and refill injection, and can also use the physical buttons set on the protective housing 204 of the refill system 20 to achieve the coordinated operation of OCT scanning and refill injection.

[0061] For example, after the operator completes the preparation work, when the smoke injection button is pressed, the Ruichong system 20 generates an imaging control command and a smoke injection command after detecting that the smoke injection button has been selected. Based on the smoke injection command, the motor drive module 201 obtains the smoke injection speed determined by the OCT system 10 based on the OCT image at the maximum speed of the pull-back injection and the minimum speed of the pull-back injection, and performs smoke injection according to the smoke dose and smoke injection speed.

[0062] In step S803, the motor drive module synchronously generates imaging control commands and transmits the imaging control commands to the imaging control module through the injection pump control module, so that the imaging control module synchronously controls the imaging device to perform OCT scanning on the blood vessels according to the imaging control commands during the injection process to obtain OCT images.

[0063] Specifically, in this embodiment of the invention, when the Ruichong system 20 generates a smoke injection command, it simultaneously generates an imaging control command and sends the imaging control command to the imaging control module 101 (which can be forwarded via the injection pump control module 102), so that the imaging control module 101 synchronously controls the imaging device to perform an OCT scan, thereby acquiring an OCT image and performing smoke detection based on the OCT image. Alternatively, the operator can click the start scan button on the scanning interface of the OCT system 10 to cause the imaging control module 101 to synchronously control the imaging device to perform an OCT scan.

[0064] Furthermore, after smoke detection is completed, the OCT system 10 generates a stop injection command, and the re-injection system 20 ends the injection. When the operator presses the pull-back start button, the re-injection system 20, upon detecting that the pull-back start button has been selected, generates an imaging control command and a pull-back injection command. The motor drive module 201 performs pull-back injection based on the pull-back injection command, according to the maximum and minimum pull-back injection speeds. Simultaneously, the re-injection system 20 sends the imaging control command to the imaging control module 101 (which can be forwarded via the injection pump control module 102) so that the imaging control module 101 synchronously controls the imaging device to perform OCT scanning, thereby acquiring an OCT image, and performing pull-back detection based on the OCT image.

[0065] Similarly, during the pullback process, the motor drive module 201 first generates a corresponding motor thrust according to the first pullback injection speed determined by the OCT system 10, so that the medium is injected into the blood vessel at the first pullback injection speed; the imaging control module 101 continuously acquires the OCT images scanned by the imaging device, and detects the flushing effect according to the OCT images. After the flushing effect reaches the preset requirements, a pullback command is triggered; after the pullback command is triggered, the motor drive module 201 generates a corresponding motor thrust according to the second pullback injection speed determined by the OCT system 10, so that the medium is injected into the blood vessel at the second pullback injection speed; after the pullback is completed, the OCT system 10 generates a stop injection command and sends the stop injection command to the motor drive module 201, and the motor drive module 201 stops the injection.

[0066] In some optional implementations, the protective housing may also have two physical buttons: a manual injection button and a manual aspiration button, but this is not a limitation. Under this configuration, the operator can manually inject via the manual injection button. When the RuiChong system 20 detects that the manual injection button has been pressed and held, the motor drive module 201 performs manual injection based on the manual injection speed, and stops manual injection upon detecting that the long press has stopped. The manual injection speed is set by the operator in the parameter setting area of ​​the OCT system 10's real-time scanning sub-interface, for example, 3 ml / s. The manual injection button setting balances the consistency of system settings with the flexibility of real-time operator control, making it suitable for injection scenarios requiring manual intervention.

[0067] In some optional implementations, during OCT imaging, if insufficient contrast agent is detected in the syringe, the operator can press and hold the automatic aspiration button on the infusion pump device. Upon detecting that the manual aspiration button has been pressed and held, the RuiChong system 20 automatically aspirates the medium into the syringe at a preset speed until a preset volume is reached, or stops aspiration upon detecting that the button has been stopped, thus automatically completing the contrast agent aspiration and filling the syringe. This embodiment of the invention provides a dual-path triggering mechanism, which improves operational convenience and system response efficiency, ensures continuous availability of contrast agent, and reduces intraoperative interruptions.

[0068] In addition, a motor braking device is added to increase the safety of motor starting.

[0069] In some optional implementations, the protective housing also features three indicator lights: a connection status indicator, a recharge operation status indicator, and a lock status indicator. These indicate the connection status between the recharger and the OCT, the recharge operation status, and the syringe lock status, respectively. When the recharger and OCT are connected, the connection status indicator turns green. When the recharger is running, the recharge operation status indicator turns green. When the syringe is successfully locked by the locking mechanism, the lock status indicator turns green.

[0070] In some optional implementations, a speed lever is also provided on the protective housing, allowing the operator to manually adjust the injection speed in real time. Therefore, during smoking or pull-back injection, the Ruichong system, upon detecting the speed lever's operation, acquires the current injection speed of the motor drive module and adjusts it based on the lever's operation signal. For example, the position difference is determined based on the initial position of the speed lever before and after the operation, and the current injection speed is adjusted accordingly. This is merely an example and not a limitation. This speed control method can be stepless or multi-level speed regulation.

[0071] In other alternative implementations, such as Figure 9As shown, the mechanical structure of the Ruichong system 20 is designed as a ramp type. Under this design, the mechanical structure of the Ruichong system 20 also includes a syringe fixing module. The syringe fixing module mainly includes a fixing base, a syringe positioning post, and a syringe locking mechanism. Its main function is to precisely and firmly fix the syringe 203 to the device. After fixing, the injection end of the syringe 203 is higher than the injection end, and the injection end is connected to the injection module 202, while the injection end is connected to the catheter of the OCT system. Therefore, when installing the syringe 203, the operator connects the injection end of the syringe 203 to the catheter via a three-way connector, ensuring the syringe scale is facing upwards. Holding the injection end and the injection end of the syringe, the operator fixes it to the slot and fixing post of the Ruichong system, and rotates the buckle counterclockwise by 90° to secure the syringe 203. This embodiment of the invention uses a special ramp-type injection control, which can smoothly adjust the injection speed, effectively avoid gas mixing or sudden injection, thereby preventing air from entering the body and improving operational safety.

[0072] Furthermore, the protective casing also includes an emergency stop button, which stops the injection process upon activation. In an emergency, the operator can press the emergency stop button on the device at any time, and the device will immediately stop all injection actions, ensuring rapid interruption of operation in case of emergencies and protecting the safety of both the patient and the operator.

[0073] The mechanical structure of the Ruichong system 20 also includes a pressure detection device, which is used to detect the injection pressure during the injection process and generate an alarm when the injection pressure exceeds a preset threshold, and immediately stop the injection to avoid tissue damage or equipment failure due to excessive pressure.

[0074] This invention, through pressure detection alarms and an emergency stop button, forms a dual safety protection system during injection, providing early warning and emergency backup. Pressure detection can anticipate sudden pressure increases caused by vascular stenosis, catheter blockage, or excessively rapid injection speed, allowing the operator to intervene promptly at the initial stage of risk. The emergency stop button, as an emergency backup measure, can quickly terminate the injection process if the risk has not subsided after an alarm or if a serious abnormality occurs. This closed-loop protection of prediction, early warning, and immediate termination completely avoids serious clinical risks such as contrast agent extravasation, vascular intima damage, and rupture caused by excessive injection pressure, significantly improving the safety of surgical procedures.

[0075] Through the above integrated design, the system ensures precise and controllable injection while automating contrast agent management, thus improving the workflow continuity and operational safety of interventional procedures. Furthermore, to facilitate physician operation, an infusion pump holder can be installed to house the infusion pump; it also features mobility and wire storage capabilities.

[0076] In some optional embodiments, the present invention uses an isolated porcine heart test method. Comparative studies on the effect of clearing blood from the lumen show that, for example... Figure 10 As shown, different injection methods significantly affect image clarity. In the data pullback of 407 cases from 230 patients who underwent manual injection, the image clarity rate was approximately 45%, with a blood residue rate of 1.48% and a poor flushing rate of 41.14%. However, after using a high-pressure injection pump to inject the contrast agent, the image clarity rate increased to 65%, the blood residue rate decreased to 0%, and the poor flushing rate also decreased to 25%. These results indicate that high-pressure injection pump injection can more effectively remove blood from the lumen, significantly improve contrast quality, and has better clinical applicability.

[0077] Furthermore, the OCT images acquired during manual injection and re-injection were analyzed, and the results are as follows: Figure 11 As shown, neither method produced a pleural effusion, but in terms of the percentage of clear images, average image command score, and contrast agent dosage, the performance of the re-pump injection was superior to manual injection. Therefore, the re-pump (injection pump) can significantly improve the clarity and image quality score of intravascular imaging; effectively reduce the amount of contrast agent used, improve surgical economy and patient safety; and achieve more stable and efficient imaging support while ensuring operational safety.

[0078] Furthermore, in this embodiment of the invention, the effect of the needle on lumen blood clearance was studied using animal experiments, and the OCT images acquired during manual injection and re-injection were analyzed. The results are as follows: Figure 12 As shown, neither method produced a pleural effusion, but in terms of the percentage of clear images, average image command score, and contrast agent dosage, the performance of the re-pump injection was superior to manual injection. Therefore, the re-pump (injection pump) can significantly improve the clarity and image quality score of intravascular imaging; effectively reduce the amount of contrast agent used, improve surgical economy and patient safety; and achieve more stable and efficient imaging support while ensuring operational safety.

[0079] The OCT automatic injection method provided by this invention, through direct connection between the OCT system and the RuiChong system, can acquire accurate and real-time transmitted operating parameters from the OCT system based on the RuiChong system, and generate injection control commands from the RuiChong system, thereby realizing injection control at the RuiChong system end, and simultaneously generating imaging control commands. The imaging control module completes OCT scanning simultaneously during the injection process, which greatly improves the coordination and consistency between the injection action and the OCT scan, and can acquire image data of the intravascular media filling status and blood removal status in real time, providing direct evidence for immediate judgment of the injection effect, avoiding invalid images or media waste caused by asynchronous injection and scanning. The RuiChong system controls the injection based on the operating parameters set by the OCT system, which can ensure the precise controllability of injection speed and dosage, reduce the operational errors of manual injection and the insufficient compatibility of traditional universal injection pumps, reduce the waste of contrast agents and other media, improve the safety and reliability of clinical operation, reduce the dependence on operator experience, and improve the convenience and efficiency of operation.

[0080] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. An automated OCT injection method, characterized in that, An OCT system applied to an automated OCT injection system, the automated OCT injection system further comprising a recharge system connected to the OCT system, the OCT system including an imaging control module and an injection pump control module, the mechanical structure of the recharge system including: a motor drive module, an injection module, and a syringe, the motor drive module being connected to the injection pump control module, the method comprising: The injection pump control module generates injection control commands and determines operating parameters; The injection pump control module transmits the injection control command and the operating parameters to the Ruichong system. The motor drive module generates motor thrust based on the injection control command and the operating parameters, and applies the motor thrust to the syringe through the injection module to inject the medium in the syringe into the blood vessel. The imaging control module synchronously controls the imaging device to perform OCT scanning on the blood vessel during the injection process to obtain OCT images.

2. The method according to claim 1, characterized in that, The OCT system is configured with an operation interface, which includes a catheter connection sub-interface and a real-time scanning sub-interface. The real-time scanning sub-interface integrates an image display area corresponding to the imaging control module, and a parameter setting area and operation control area corresponding to the infusion pump control module. The infusion pump control module determines operating parameters, including: When the OCT system is powered on, it enters the catheter connection sub-interface, detects the connection status with the RuiChong system, and displays the connection status in the catheter connection sub-interface and the real-time scanning sub-interface. Once the connection is successful, the OCT system enters the real-time scanning sub-interface. When it detects that the stop scanning button and the use of the recharge button are selected in the real-time scanning sub-interface, it obtains the operation parameters set in the parameter setting area. After detecting that the confirmation setting button in the parameter setting area is selected, it sends the operation parameters to the motor drive module. The operation parameters include at least: smoke dose, maximum pull-back injection speed, minimum pull-back injection speed, limited pressure, and manual injection speed.

3. The method according to claim 2, characterized in that, The operation control area is equipped with a smoke test button and a pull-back start button; The infusion pump control module generates injection control commands, including: After detecting that the smoke test button or the pull-back start button is selected, a smoke injection command or a pull-back injection command is generated and sent to the motor drive module. The motor drive module performs smoke injection based on the smoke injection command, according to the smoke dosage, the maximum pull-back injection speed and the minimum pull-back injection speed, or performs pull-back injection based on the pull-back injection command, according to the maximum pull-back injection speed and the minimum pull-back injection speed. The imaging control module synchronously controls the imaging device to perform OCT scanning on the blood vessel, acquires OCT images, and performs smoke detection or pull-back detection based on the OCT images. After the smoke detection is successful or the pullback is completed, the OCT system generates a stop injection command and sends the stop injection command to the motor drive module, which then stops injection.

4. The method according to claim 2, characterized in that, The operation control area is also provided with a reset button, and the method further includes: After the reset button is detected to be selected, a suction command is generated and sent to the motor drive module so that the motor drive module can suction the medium into the syringe at a preset speed until the preset capacity is reached and then suction stops.

5. An automated OCT injection method, characterized in that, A refill system for use in an OCT automated injection system, the OCT automated injection system further comprising an OCT system connected to the refill system, the OCT system comprising an imaging control module and an injection pump control module, the mechanical structure of the refill system comprising: a motor drive module, an injection module, and a syringe, the motor drive module being connected to the injection pump control module, the method comprising: The motor drive module acquires operating parameters; The motor drive module generates injection control commands and generates motor thrust based on the injection control commands and the operating parameters. The motor thrust is then applied to the syringe through the injection module to push the medium in the syringe into the blood vessel. The motor drive module synchronously generates imaging control commands and transmits these commands to the imaging control module via the injection pump control module. This enables the imaging control module to synchronously control the imaging device to perform OCT scanning on the blood vessel during the injection process, thereby obtaining an OCT image.

6. The method according to claim 5, characterized in that, The operating parameters include at least: smoke injection dose, maximum pull-back injection speed, minimum pull-back injection speed, limited pressure, and manual injection speed. The mechanical structure of the Ruichong system also includes: a protective shell, on which are provided a smoke injection button, a pull-back injection button, a connection status indicator light, and a Ruichong operating status indicator light. The connection status indicator light is used to show the connection status between the OCT system and the Ruichong system, and the Ruichong operating status indicator light is used to show the operating status of the Ruichong system. The motor drive module generates injection control commands and, based on the injection control commands and the operating parameters, generates motor thrust. The motor thrust is then applied to the syringe via the injection module to push the medium in the syringe into the blood vessel, including: When the OCT system and the Ruichong system are successfully connected, after the Ruichong system detects that the smoke injection button or the pull-back injection button is selected, the Ruichong system generates a smoke injection command or a pull-back injection command. The motor drive module performs a smoke injection based on the smoke injection command, according to the smoke dosage, the maximum pull-back injection speed, and the minimum pull-back injection speed, or performs a pull-back injection based on the pull-back injection command, according to the maximum pull-back injection speed and the minimum pull-back injection speed. The RuiChong system sends the imaging control command to the imaging control module, so that the imaging control module synchronously controls the imaging device to perform OCT scanning on the blood vessel, acquires OCT images, and performs smoke detection or pullback detection based on the OCT images. After the imaging control module determines that the smoke detection is successful or the pull-back is completed based on the OCT image, the motor drive module obtains the stop injection command from the OCT system and stops injection according to the stop injection command.

7. The method according to claim 6, characterized in that, The step of performing pullback injection based on the maximum pullback injection speed and the minimum pullback injection speed includes: The OCT system obtains a first pullback injection speed determined by the OCT image between the maximum pullback injection speed and the minimum pullback injection speed; The motor drive module generates a corresponding motor thrust according to the first pull-back injection speed, so that the medium is injected into the blood vessel according to the first pull-back injection speed; When the imaging control module synchronously controls the imaging device to perform OCT scanning on the blood vessel, acquires the OCT image, and after the flushing effect is detected to meet the preset requirements based on the OCT image, it acquires the pull-back command generated by the infusion pump control module. Upon receiving the pullback command, the OCT system acquires a second pullback injection speed determined by the OCT image between the maximum pullback injection speed and the minimum pullback injection speed. The motor drive module generates a corresponding motor thrust according to the second pull-back injection speed, so that the medium is injected into the blood vessel according to the second pull-back injection speed.

8. The method according to claim 6, characterized in that, The protective housing further includes: a manual injection button, a manual aspiration button, and an emergency stop button; the method further includes: After detecting that the manual injection button is selected by long press, the motor drive module performs manual injection based on the manual injection speed, and stops manual injection after detecting that the long press has stopped; After the manual suction button is detected to be pressed and held, the motor drive module draws the medium into the syringe at a preset speed until the preset volume is reached and then stops drawing, or stops drawing after the button is stopped. Once the emergency stop button is detected as being selected, the injection process is stopped.

9. The method according to any one of claims 6 or 8, characterized in that, The protective housing further includes a speed lever, and the method further includes: After detecting that the speed lever has been operated, the current injection speed of the motor drive module is obtained, and the current injection speed is adjusted based on the operation signal of the speed lever.

10. The method according to claim 5, characterized in that, The mechanical structure of the Ruichong system also includes a syringe fixing module and a locking status indicator; The syringe fixing module is used to fix the syringe so that the injection end of the syringe is higher than the injection end of the syringe, and the injection end is connected to the injection module, while the injection end is connected to the catheter of the OCT system. The lock status indicator light is used to show the lock status of the syringe fixing module on the syringe.

Images