Syringe pump control method, control system and syringe pump

Abstract

The application belongs to the technical field of medicine, and particularly relates to an apparatus for inputting medium into or onto a human body, and more particularly relates to an injection pump control method, a control system and an injection pump. The injection pump control method comprises the following steps: a control module acquires the amount of residual medicine in an injection tube arranged on the injection pump; the control module acquires a soft start time according to the amount of residual medicine; and when the speed of infusing medicine changes in the process of continuously infusing medicine by the injection pump, the control module restarts a driving motor in the injection pump according to the soft start time, so that the soft start time is calculated according to the amount of residual medicine in the injection tube, and the risk of impact of medicine injection caused by the mismatch between the amount of residual medicine and the originally fixed soft start time is avoided.

Description

Technical Field

[0001] This invention belongs to the field of medical technology, specifically relating to devices for introducing media into or delivering to the human body, and particularly to an infusion pump control method, control system, and infusion pump. Background Technology

[0002] In the medical industry, an infusion pump is a device that can precisely control the infusion rate, dosage, and time of medication. Its core function is to ensure that the medication enters the patient's body according to a preset, precise plan. According to the usage requirements of the infusion pump, when adjusting the infusion rate, it is necessary to pause the current infusion, adjust the parameters, and then restart it. In related technologies, in order to avoid the phenomenon of "pulsating infusion" where the flow rate exceeds the set value for a short period of time due to a sudden release of pressure at the moment of infusion pump startup, a fixed soft-start time is used. However, after the infusion pump has been used for a certain period of time, the amount of residual medication in the injection tube is less than the amount of medication at the beginning of the infusion. If the infusion rate needs to be adjusted at this time, and the drive motor is still controlled by a fixed soft-start time, the residual medication amount and the soft-start time will not match, and there will still be a risk of impact in the drug injection.

[0003] Therefore, how to avoid the aforementioned risks of impact is a technical problem that urgently needs to be solved in this field.

[0004] It should be noted that the information disclosed in this background section is only for understanding the background technology of the present application concept, and therefore, the above description is not considered to constitute prior art information. Summary of the Invention

[0005] This disclosure provides at least one infusion pump control method, control system, and infusion pump.

[0006] In a first aspect, embodiments of this disclosure provide an infusion pump control method, including:

[0007] The control module obtains the amount of residual drug in the injection tubing set on the injection pump.

[0008] The control module determines the soft-start time based on the amount of residual drug.

[0009] During the continuous infusion of medication by the injection pump, when the infusion rate changes, the control module restarts the drive motor in the injection pump according to the soft start time.

[0010] In one optional implementation, the method by which the control module obtains the amount of residual drug in the injection tubing on the infusion pump in real time includes:

[0011] The control module is configured to acquire the travel distance of the piston handle in the injection tube driven by the propulsion mechanism in the injection pump, and then the amount of drug injected into the injection tube is:

[0012] V0 = L·A;

[0013] Where V0 is the amount of drug injected into the injection tube; L is the stroke of the piston handle in the injection tube driven by the propulsion mechanism in the injection pump; and A is the inner cross-sectional area of ​​the injection tube.

[0014] The control module obtains the amount of residual drug V in the injection tube based on the amount of drug already injected into the tube;

[0015] V = V 总 -V0;

[0016] Where V represents the amount of residual drug in the injection tube; V 总 This is the preset total amount of medication.

[0017] In one optional implementation, the method by which the control module obtains the soft-start time based on the amount of residual drug includes:

[0018] The control module obtains the soft-start time T;

[0019]

[0020] Where V is the amount of residual drug in the syringe; k is the flow rate adjustment coefficient; Q is the adjusted target flow rate; c is the viscosity influence coefficient; μ is the dynamic viscosity of the drug solution; r is the inner diameter of the needle of the syringe used; ρ is the density of the drug solution; and X is the length of the needle of the syringe used.

[0021] Secondly, embodiments of this disclosure also provide an infusion pump control system, comprising:

[0022] The dosage acquisition module is configured to acquire the amount of residual drug in the injection tubing set on the injection pump;

[0023] The soft-start time module is configured to obtain the soft-start time based on the amount of residual drug.

[0024] Thirdly, embodiments of this disclosure also provide a non-transitory readable storage medium storing a computer program / instructions thereon, which, when executed by a processor, implements the steps of the above-described infusion pump control method.

[0025] Fourthly, embodiments of this disclosure also provide a program product containing instructions that, when executed by a device, cause the device to perform the steps of the above-described infusion pump control method.

[0026] Fifthly, embodiments of this disclosure also provide an infusion pump, comprising:

[0027] A control module, and a drive motor electrically connected to the control module;

[0028] The control module is adapted to control the drive motor using the injection pump control method as described in claim 1.

[0029] In one alternative embodiment, the drive motor is disposed within the housing;

[0030] A lead screw is inserted inside the housing, which is connected to a drive motor and is rotatably connected to the housing.

[0031] The housing contains a pair of sliding rods parallel to the lead screw, and a slider is slidably mounted on the sliding rod, which is threadedly connected to the lead screw.

[0032] The slider is provided with an extension rod, which is parallel to the slide rod and extends out of the housing;

[0033] The extension rod is connected to a propulsion mechanism at one end extending out of the housing;

[0034] The control module controls the lead screw to rotate, thereby driving the slider to move on the slide rod, which in turn drives the propulsion mechanism to move and push the injection tube.

[0035] In one optional embodiment, the outer wall of the housing is provided with a placement position that matches the shape of the outer wall of the injection tube. When the injection tube is placed in the placement position, the central axis of the injection tube is parallel to the lead screw.

[0036] The limiting mechanism provided in the housing contacts the outer wall of the injection tube to clamp the injection tube.

[0037] In one optional embodiment, the limiting mechanism includes: a movable rod;

[0038] A guide sleeve is provided inside the housing. The guide sleeve is perpendicular to the slide rod. The moving rod passes through the guide sleeve. One end of the moving rod is located inside the housing, and the other end extends out of the housing.

[0039] A clamping block is connected to one end of the moving rod that extends out of the housing. A groove that matches the outer wall of the injection tube is provided on one side of the clamping block near the outer wall of the housing.

[0040] The movable rod is connected to a block at one end inside the housing;

[0041] A limiting strip parallel to the moving rod is provided on one side of the moving rod inside the housing. A sliding groove is provided on the side of the limiting strip near the moving rod. A limiting block is provided on the side wall of the block. The limiting block extends into the sliding groove and is adapted to move along the sliding groove.

[0042] A spring is connected between the block and the guide sleeve, and the spring is sleeved on the moving rod.

[0043] The beneficial effect of this invention is that the injection pump control method includes: a control module acquiring the amount of residual drug in the injection tube set on the injection pump; the control module acquiring a soft start time based on the amount of residual drug; during the continuous infusion of the drug solution by the injection pump, when the infusion rate changes, the control module restarts the drive motor in the injection pump based on the soft start time, thereby realizing the calculation of the soft start time based on the amount of residual drug in the injection tube, avoiding the risk of impact during drug injection caused by the mismatch between the amount of residual drug and the originally fixed soft start time.

[0044] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained through the structures particularly pointed out in the description and the drawings.

[0045] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0046] 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.

[0047] Figure 1 A flowchart of an injection pump control method provided in this embodiment of the present disclosure;

[0048] Figure 2 This is a schematic diagram of the structure of an injection pump provided in an embodiment of the present disclosure;

[0049] Figure 3 This is a schematic diagram of the internal structure of an injection pump provided in an embodiment of the present disclosure;

[0050] Figure 4 This is a schematic diagram of a limiting mechanism provided in an embodiment of the present disclosure.

[0051] In the picture:

[0052] 1. Housing, 11. Placement position, 12. Guide sleeve, 13. Limiting strip, 14. Slide groove;

[0053] 2. Drive motor; 21. Lead screw; 22. Sliding rod; 23. Sliding block; 24. Extension rod;

[0054] 3. Propulsion mechanism;

[0055] 4. Limiting mechanism, 41. Moving rod, 42. Clamping block, 43. Groove, 44. Block, 45. Limiting block, 46. Spring. Detailed Implementation

[0056] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions 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.

[0057] As used herein, the phrases “in one embodiment,” “according to one embodiment,” “in some embodiments,” etc., generally refer to the fact that a particular feature, structure, or characteristic following the phrase can be included in at least one embodiment of this disclosure. Therefore, a particular feature, structure, or characteristic can be included in more than one embodiment of this disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms “example,” “exemplary,” etc., are used to “serve as an example, instance, or illustration.” Any implementation, aspect, or design described herein as “example” or “exemplary” is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. Rather, the use of the terms “example,” “exemplary,” etc., is intended to present concepts in a specific manner.

[0058] In the medical industry, infusion pumps are devices that precisely control the infusion rate, dosage, and time of medication. Their core function is to ensure that drugs enter the patient's body according to a pre-set, precise protocol. According to the usage requirements of infusion pumps, when adjusting the infusion rate, the current infusion needs to be paused, parameters adjusted, and then restarted. In related technologies, to avoid a "pulsating infusion" phenomenon where the flow rate exceeds the set value for a short period due to a sudden pressure release at startup, a fixed soft-start time is used. However, after a certain period of use, the amount of residual medication in the infusion tubing is less than the initial amount. If the infusion rate needs to be adjusted at this point, and the drive motor is still controlled using a fixed soft-start time, the mismatch between the residual medication and the soft-start time will result in a continued risk of impact during drug injection. The shortcomings of the above solutions are the result of the inventors' practical experience and careful research. Therefore, the discovery process of the above problems and the solutions proposed in this disclosure should be considered contributions made by the inventors to this disclosure.

[0059] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0060] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0061] like Figure 1 As shown, at least one disclosed embodiment provides an infusion pump control method, including: a control module acquiring the amount of residual drug in the injection tube set on the infusion pump; the control module acquiring a soft start time based on the amount of residual drug; during the continuous infusion of the drug solution by the infusion pump, when the infusion rate changes, the control module restarts the drive motor 2 in the infusion pump based on the soft start time, thereby realizing the calculation of the soft start time based on the amount of residual drug in the injection tube, avoiding the risk of impact during drug injection caused by the mismatch between the amount of residual drug and the originally fixed soft start time.

[0062] In this embodiment, the soft start time is the time required for the speed of the infusion of medicine by the drive motor 2 to increase from 0 to the currently set speed after startup.

[0063] In this embodiment, the change in the infusion rate refers to the situation where, during the infusion process, it is necessary to reset the infusion rate of the injection pump.

[0064] In one optional embodiment, the method by which the control module obtains the amount of residual drug in the injection tube on the injection pump in real time includes: the control module is configured to obtain the travel distance of the piston handle in the injection tube pushed by the propulsion mechanism 3 in the injection pump, then the amount of drug injected into the injection tube is:

[0065] V0 = L·A;

[0066] Where V0 represents the amount of drug injected into the syringe, in units of m³. 3 L represents the stroke of the piston handle in the injection tube propelled by the propulsion mechanism 3 in the injection pump, measured in meters (m); A represents the inner cross-sectional area of ​​the injection tube, measured in cubic meters (m²). 2 The control module obtains the amount of residual drug V in the injection tube based on the amount of drug already injected.

[0067] V = V 总 -V0;

[0068] Where V represents the amount of residual drug in the syringe, in meters (m). 3 V 总 The preset total drug volume can be obtained directly before the drug infusion begins, and the unit is m. 3 .

[0069] In this embodiment, the control module can record the movement of the lead screw 21 in real time during the rotation of the drive motor 2, so as to reflect the distance moved by the propulsion mechanism 3, that is, the distance the piston handle of the injection tube is pushed in, and the movement of the piston handle in the injection tube by the propulsion mechanism 3 in the injection pump.

[0070] In one optional implementation, the method by which the control module obtains the soft-start time based on the amount of residual drug includes: the control module obtaining the soft-start time T;

[0071]

[0072] Where V is the amount of residual drug in the syringe; k is the flow rate adjustment coefficient, dimensionless, typically taken as (0.8-1.05)×10 3 Q represents the adjusted target flow velocity, in meters per second (m). 3 / s; c is the viscosity influence coefficient, dimensionless, representing the effect of viscous resistance on the drug solution, usually taken as 0.01-0.1; μ is the dynamic viscosity of the drug solution, in kg / (m·s); r is the inner diameter of the syringe needle used, in m; ρ is the density of the drug solution, in kg / m³. 3 X represents the length of the syringe needle used, in meters (m).

[0073] In this embodiment, when the infusion rate needs to be adjusted, the specific residual amount is 1×10⁻⁶. -5 m 3 Propofol (10 mL), target flow rate 6 × 10⁻⁶ -8 m 3 / s (0.06mL / s), needle radius 0.72mm (22G needle), needle length 0.01m, viscosity influence coefficient 0.01, dynamic viscosity of the drug solution 4×10 -3 kg / (m·s), the density of the liquid medicine is 954 kg / m 3 ,but

[0074]

[0075] The soft start time T is 0.41s.

[0076] At least one other disclosed embodiment also provides an infusion pump control system, including: a drug acquisition module configured to acquire the amount of residual drug in an injection tube disposed on the infusion pump; and a soft-start time module configured to acquire a soft-start time based on the amount of residual drug.

[0077] In this embodiment, the above-mentioned module functions can be integrated into the control module.

[0078] At least one other disclosed embodiment also provides a non-transitory readable storage medium having a computer program / instructions stored thereon that, when executed by a processor, implements the steps of the above-described infusion pump control method.

[0079] At least one other disclosed embodiment also provides a program product containing instructions that, when executed by a device, cause the device to perform the steps of the above-described infusion pump control method.

[0080] like Figure 2 As shown, at least one other disclosed embodiment also provides an injection pump, including: a control module, and a drive motor 2 electrically connected to the control module; the control module is adapted to control the drive motor 2 using the injection pump control method as described in claim 1.

[0081] like Figure 3 As shown, in one optional embodiment, the drive motor 2 is disposed inside the housing 1; a lead screw 21 is inserted inside the housing 1, the lead screw 21 is connected to the drive motor 2, and the lead screw 21 is rotatably connected to the housing 1; a pair of slide rods 22 parallel to the lead screw 21 are disposed inside the housing 1, and a slider 23 is slidably disposed on the slide rods 22, the slider 23 being threadedly connected to the lead screw 21; an extension rod 24 is disposed on the slider 23, the extension rod 24 is parallel to the slide rods 22, and the extension rod 24 extends out of the housing 1; one end of the extension rod 24 extending out of the housing 1 is connected to a propulsion mechanism 3; the control module controls the lead screw 21 to rotate, thereby driving the slider 23 to move on the slide rods 22, and thereby driving the propulsion mechanism 3 to move and push the injection tube.

[0082] In this embodiment, the drive motor 2 can be connected to the lead screw 21 through a transmission mechanism such as a gear set. The control module can control the rotation speed of the lead screw 21 as needed, thereby controlling the moving speed of the propulsion mechanism 3 to meet the requirements of the infusion speed.

[0083] In this embodiment, the propulsion mechanism 3 can adopt an existing related mechanism to clamp the piston handle of the injection tube, so as to stably push the piston handle and accurately maintain the infusion speed.

[0084] In one optional embodiment, the outer wall of the housing 1 is provided with a placement position 11 that is adapted to the shape of the outer wall of the injection tube. When the injection tube is placed in the placement position 11, the central axis of the injection tube is parallel to the lead screw 21. The limiting mechanism 4 provided in the housing 1 contacts the outer wall of the injection tube to clamp the injection tube.

[0085] In this embodiment, the placement position 11 can better and more stably place the injection tube.

[0086] like Figure 4As shown, in an optional embodiment, the limiting mechanism 4 includes: a moving rod 41; a guide sleeve 12 is provided inside the housing 1, the guide sleeve 12 is perpendicular to the sliding rod 22, the moving rod 41 passes through the guide sleeve 12, one end of the moving rod 41 is located inside the housing 1, and the other end extends out of the housing 1; a clamping block 42 is connected to the end of the moving rod 41 extending out of the housing 1, and a groove 43 adapted to the outer wall of the injection tube is opened on the side of the clamping block 42 near the outer wall of the housing 1; a block 44 is connected to the end of the moving rod 41 located inside the housing 1; a limiting strip 13 parallel to the moving rod 41 is provided on one side of the moving rod 41 inside the housing 1, and a sliding groove 14 is opened on the side of the limiting strip 13 near the moving rod 41; a limiting block 45 is provided on the side wall of the block 44, the limiting block 45 extends into the sliding groove 14, and the limiting block 45 is adapted to move along the sliding groove 14;

[0087] A spring 46 is connected between the block 44 and the guide sleeve 12, and the spring 46 is sleeved on the moving rod 41.

[0088] In this embodiment, the injection tube can be stably clamped in the placement position 11 by the clamping block 42.

[0089] In this embodiment, when the clamping block 42 is in the initial state, the spring 46 is in a balanced state, and the space between the clamping block 42 and the placement position 11 is smaller than the outer diameter of the injection tube.

[0090] In this embodiment, when it is necessary to place the injection tube, the clamping block 42 can be manually held to pull the moving rod 41 out of the housing 1 by a certain length, and then the injection tube can be placed. After placement, the clamping block 42 is driven by the spring 46 to stick tightly to the outer wall of the injection tube. At this time, the spring 46 is in a compressed state, which makes the moving rod 41 tend to extend into the housing 1, so as to keep the clamping block 42 clamping the injection tube.

[0091] In this embodiment, the control module can be electrically connected to the button module, which is set on the outer wall of the housing 1. The button module can be used to set the moving speed of the propulsion mechanism 3, and thus the infusion speed.

[0092] In summary, this infusion pump control method includes: a control module acquiring the amount of residual drug in the injection tubing set on the infusion pump; the control module acquiring a soft-start time based on the amount of residual drug; and during the continuous infusion of medication by the infusion pump, when the infusion rate changes, the control module restarting the drive motor 2 in the infusion pump based on the soft-start time. This achieves the calculation of the soft-start time based on the amount of residual drug in the injection tubing, avoiding the risk of impact during drug injection due to a mismatch between the amount of residual drug and the originally fixed soft-start time.

[0093] The disclosures and other solutions, examples, embodiments, modules, and functional operations described in this document can be implemented in digital electronic circuits, or computer software, firmware, or hardware, including the structures disclosed in this document and their structural equivalents, or combinations thereof. The disclosures and other embodiments can be implemented as one or more computer program products, i.e., one or more modules of computer program instructions encoded on a tangible and non-volatile computer-readable medium for execution by a data processing apparatus or for controlling the operation of a data processing apparatus. The computer-readable medium can be a machine-readable storage device, a machine-readable storage substrate, a storage device, a material composition that influences machine-readable propagated signals, or a combination thereof. In addition to hardware, the apparatus may also include code that creates an execution environment for a computer program, such as code constituting processor firmware, a protocol stack, a database management system, an operating system, or a combination thereof. The propagated signals are artificially generated signals, such as machine-generated electrical, optical, or electromagnetic signals, which are generated to encode information for transmission to a suitable receiver device.

[0094] Computer programs (also known as programs, software, software applications, scripts, or code) can be written in any programming language (including compiled or interpreted languages) and can be deployed in any form, including as standalone programs or as modules, components, subroutines, or other units suitable for use in a computing environment. A computer program does not necessarily correspond to a file in a file system. A program can be stored in a portion of a file that holds other programs or data (e.g., one or more scripts stored in a markup language document), in a single file dedicated to that program, or in multiple coordinating files (e.g., a file storing one or more modules, subroutines, or portions of code). Computer programs can be deployed and executed on one or more computers located at a single site or distributed across multiple sites interconnected by a communication network.

[0095] The processing and logic flows described in this document can be executed by one or more programmable processors that execute one or more computer programs to perform functions by manipulating input data and generating outputs. The processing and logic flows can also be executed by special-purpose logic circuitry, and the devices can be implemented as special-purpose logic circuitry, such as FPGAs (Field-Programmable Gate Arrays) or ASICs (Application-Specific Integrated Circuits).

[0096] For example, processors suitable for executing computer programs include general-purpose and special-purpose microprocessors, as well as any one or more of any type of digital computer. Typically, the processor receives instructions and data from read-only memory or random access memory, or both. The basic components of a computer are a processor that executes instructions and one or more storage devices that store the instructions and data. Typically, a computer will also include one or more mass storage devices for storing data, such as magnetic disks, magneto-optical disks, or optical disks, or operatively coupled to receive data from or transfer data to mass storage devices, or both. However, a computer does not necessarily have such devices. Computer-readable media suitable for storing computer program instructions and data include all forms of non-volatile memory, media, and memory devices, including, for example, semiconductor memory devices such as erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), and flash memory devices; magnetic disks, such as internal hard disks or removable disks; magneto-optical disks; and optical disc read-only memory (CD ROM) and digital versatile optical disc read-only memory (DVD-ROM). The processor and memory may be supplemented by dedicated logic circuitry or incorporated into dedicated logic circuitry.

[0097] While several embodiments are provided in this disclosure, it should be understood that the disclosed systems and methods may be embodied in many other specific forms without departing from the spirit or scope of this disclosure. The present examples are intended to be illustrative rather than restrictive and are not limited to the details given. For example, various elements or components may be combined or integrated into another system, or certain features may be omitted or not implemented.

[0098] In the several embodiments provided herein, it should be understood that the disclosed apparatus and methods can also be implemented in other ways. The apparatus embodiments described above are merely illustrative; for example, the flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods, and computer program products according to various embodiments of the present invention. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in a different order than those marked in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram and / or flowchart, and combinations of blocks in block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.

[0099] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A non-transitory readable storage medium storing computer programs / instructions thereon, characterized in that, When this computer program / instruction is executed by the processor, it implements the steps of the infusion pump control method, namely... During the continuous infusion of medication by the injection pump, when the infusion rate changes, the control module calculates the amount of residual medication in the injection tubing set on the injection pump in real time. The control module determines the soft-start time based on the amount of residual drug. The control module restarts the drive motor in the injection pump according to the soft start time (2); The method by which the control module obtains the soft-start time based on the amount of residual drug includes: The control module calculates the soft start time. T ; ； in, V This refers to the amount of residual drug in the syringe. k This is the flow rate adjustment coefficient; Q The adjusted target flow rate; c This is the viscosity influence coefficient; μ The dynamic viscosity of the drug solution; r The inner diameter of the needle in the syringe used; ρ The density of the liquid medicine; X The needle length of the syringe used.

2. The non-transitory readable storage medium as described in claim 1, characterized in that: The method by which the control module calculates the amount of residual drug in the injection tubing on the injection pump in real time includes: The control module is configured to obtain the travel distance of the piston handle in the injection tube pushed by the propulsion mechanism (3) in the injection pump, and the amount of drug injected into the injection tube is: ； in, V 0 represents the amount of medication already injected into the syringe; L The propulsion mechanism (3) in the injection pump drives the piston handle in the injection tube to move. A This is the inner cross-sectional area of ​​the injection tube; The control module obtains the amount of residual drug in the injection tube based on the amount of drug already injected. V ; ； in, V This refers to the amount of residual drug in the syringe. V 总 This is the preset total amount of medication.

3. A program product containing instructions, characterized in that, When the instruction is executed by the device, it causes the device to perform the steps of the infusion pump control method, namely... During the continuous infusion of medication by the injection pump, when the infusion rate changes, the control module calculates the amount of residual medication in the injection tubing set on the injection pump in real time. The control module determines the soft-start time based on the amount of residual drug. The control module restarts the drive motor in the injection pump according to the soft start time (2); The method by which the control module obtains the soft-start time based on the amount of residual drug includes: The control module calculates the soft start time. T ; ； in, V This refers to the amount of residual drug in the syringe. k This is the flow rate adjustment coefficient; Q The adjusted target flow rate; c This is the viscosity influence coefficient; μ The dynamic viscosity of the drug solution; r The inner diameter of the needle in the syringe used; ρ The density of the liquid medicine; X The needle length of the syringe used.

4. The program product containing instructions as described in claim 3, characterized in that: The method by which the control module calculates the amount of residual drug in the injection tubing on the injection pump in real time includes: The control module is configured to obtain the travel distance of the piston handle in the injection tube pushed by the propulsion mechanism (3) in the injection pump, and the amount of drug injected into the injection tube is: ； in, V 0 represents the amount of medication already injected into the syringe; L The propulsion mechanism (3) in the injection pump drives the piston handle in the injection tube to move. A This is the inner cross-sectional area of ​​the injection tube; The control module obtains the amount of residual drug in the injection tube based on the amount of drug already injected. V ; ； in, V This refers to the amount of residual drug in the syringe. V 总 This is the preset total amount of medication.

5. A syringe pump control system, characterized in that, include: The drug dosage acquisition module is configured to acquire the amount of residual drug in the injection tube set on the injection pump in real time when the infusion rate changes during the continuous infusion of drug solution by the injection pump. The soft-start time module is configured to obtain the soft-start time based on the amount of residual drug. T ; ； in, V This refers to the amount of residual drug in the syringe. k This is the flow rate adjustment coefficient; Q The adjusted target flow rate; c This is the viscosity influence coefficient; μ The dynamic viscosity of the drug solution; r The inner diameter of the needle in the syringe used; ρ The density of the liquid medicine; X The length of the needle in the syringe used; The control module restarts the drive motor (2) in the injection pump according to the soft start time.

6. An injection pump, characterized in that, include: A control module, and a drive motor (2) electrically connected to the control module; The control module is adapted to control the drive motor (2) using an injection pump control method, i.e. During the continuous infusion of medication by the injection pump, when the infusion rate changes, the control module calculates the amount of residual medication in the injection tubing set on the injection pump in real time. The control module determines the soft-start time based on the amount of residual drug. The control module restarts the drive motor in the injection pump according to the soft start time (2); The method by which the control module obtains the soft-start time based on the amount of residual drug includes: The control module calculates the soft start time. T ; ； in, V This refers to the amount of residual drug in the syringe. k This is the flow rate adjustment coefficient; Q The adjusted target flow rate; c This is the viscosity influence coefficient; μ The dynamic viscosity of the drug solution; r The inner diameter of the needle in the syringe used; ρ The density of the liquid medicine; X The needle length of the syringe used.

7. The syringe pump as described in claim 6, characterized in that: The method by which the control module calculates the amount of residual drug in the injection tubing on the injection pump in real time includes: The control module is configured to obtain the travel distance of the piston handle in the injection tube pushed by the propulsion mechanism (3) in the injection pump, and the amount of drug injected into the injection tube is: ； in, V 0 represents the amount of medication already injected into the syringe; L The propulsion mechanism (3) in the injection pump drives the piston handle in the injection tube to move. A This is the inner cross-sectional area of ​​the injection tube; The control module obtains the amount of residual drug in the injection tube based on the amount of drug already injected. V ; ； in, V This refers to the amount of residual drug in the syringe. V 总 This is the preset total amount of medication.

8. The syringe pump as described in claim 7, characterized in that: The drive motor (2) is disposed inside the housing (1); A lead screw (21) is inserted inside the housing (1). The lead screw (21) is connected to the drive motor (2), and the lead screw (21) is rotatably connected to the housing (1). The housing (1) is provided with a pair of slide rods (22) parallel to the lead screw (21). A slider (23) is slidably provided on the slide rod (22), and the slider (23) is threadedly connected to the lead screw (21). An extension rod (24) is provided on the slider (23), the extension rod (24) is parallel to the slide rod (22), and the extension rod (24) extends out of the housing (1). The extension rod (24) is connected to a propulsion mechanism (3) at one end extending out of the housing (1); The control module controls the lead screw (21) to rotate, thereby driving the slider (23) to move on the slide rod (22), which in turn drives the propulsion mechanism (3) to move and push the piston handle in the injection tube.

9. The syringe pump as described in claim 8, characterized in that: The outer wall of the housing (1) is provided with a placement position (11) that is adapted to the shape of the outer wall of the injection tube. When the injection tube is placed in the placement position (11), the central axis of the injection tube is parallel to the lead screw (21). The limiting mechanism (4) provided in the housing (1) contacts the outer wall of the injection tube to clamp the injection tube.

10. The syringe pump as claimed in claim 9, characterized in that: The limiting mechanism (4) includes: a moving rod (41); A guide sleeve (12) is provided inside the housing (1). The guide sleeve (12) is perpendicular to the slide rod (22). The moving rod (41) passes through the guide sleeve (12). One end of the moving rod (41) is located inside the housing (1), and the other end extends out of the housing (1). The moving rod (41) has a clamping block (42) connected to one end of the rod extending out of the housing (1). The clamping block (42) has a groove (43) on one side of the housing (1) that is close to the outer wall and is adapted to the outer wall of the injection tube. The movable rod (41) is connected to a block (44) at one end inside the housing (1). A limiting strip (13) parallel to the moving rod (41) is provided on one side of the housing (1). A sliding groove (14) is provided on the side of the limiting strip (13) near the moving rod (41). A limiting block (45) is provided on the side wall of the block (44). The limiting block (45) extends into the sliding groove (14) and is adapted to move along the sliding groove (14). A spring (46) is connected between the block (44) and the guide sleeve (12), and the spring (46) is sleeved on the moving rod (41).

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