WO2022094918A1

WO2022094918A1 - Peristaltic speed change control method and device for infusion pump, infusion pump, and storage medium

Info

Publication number: WO2022094918A1
Application number: PCT/CN2020/127073
Authority: WO
Inventors: 刘希娟; 吴张龙
Original assignee: 深圳市科曼医疗设备有限公司
Priority date: 2020-11-06
Filing date: 2020-11-06
Publication date: 2022-05-12

Abstract

A peristaltic speed change control method for an infusion pump, comprising: acquiring a speed-time curve of an entire peristaltic cycle of an infusion pump according to a preset rotational speed (S101); calculating, according to the speed-time curve, an average infusion speed of the entire peristaltic cycle (S102); dividing the entire peristaltic cycle into n segments according to a certain period of time, and calculating an average infusion speed corresponding to each segment (S103), n being a positive integer greater than 1; enabling the average infusion speed of the entire peristaltic cycle to be directly proportional to the average infusion speed corresponding to each segment, and obtaining an acceleration coefficient table (S104); and performing speed change adjustment by multiplying the average rotational speed of a motor by coefficients in the acceleration coefficient table to obtain a uniform infusion speed (S105). Thus, an infusion pump can perform infusion at a more uniform speed.

Description

A peristaltic variable speed control method and device for an infusion pump, an infusion pump, and a storage medium

technical field

The invention relates to the technical field of peristaltic variable speed of infusion pumps, in particular to a peristaltic variable speed control method and device of an infusion pump, an infusion pump and a storage medium.

Background technique

At present, most of the infusion pumps on the market use the peristaltic pump plate, which squeezes the liquid in the infusion tube forward through the peristaltic pump plate on the eccentric wheel driven by the motor. However, this method has an inherent defect, that is, the amount of liquid squeezed throughout the cycle is uneven, resulting in an uneven infusion rate, especially at the beginning and end of the cycle, where the infusion rate is basically zero.

In the prior art, the commonly used method is to roughly change the rotational speed of the motor, so that the infusion pump quickly passes through the period when the infusion speed is substantially zero, which causes the final infusion speed to be very uneven.

Therefore, how to make the infusion pump uniform infusion has become an urgent technical problem to be solved.

technical problem

The technical problem to be solved by the present invention is how to make the infusion pump infuse uniformly.

technical solutions

To this end, according to the first aspect, an embodiment of the present invention discloses a peristaltic variable speed control method for an infusion pump. Installing an infusion set on the infusion pump includes: obtaining a speed-time curve of the entire peristaltic cycle of the infusion pump at a preset rotational speed; According to the speed-time curve, the average infusion speed of the entire peristaltic cycle is calculated; the entire peristaltic cycle is evenly divided into n sections according to a certain time, and the average infusion speed corresponding to each section is calculated; n is a positive integer greater than 1; The average infusion speed of the entire peristaltic cycle is proportional to the average infusion speed corresponding to each segment, and an acceleration coefficient table is obtained; the motor is adjusted by multiplying the average speed of the motor by the coefficient of the acceleration coefficient table to obtain a uniform infusion. speed.

According to a second aspect, an embodiment of the present invention discloses a peristaltic variable speed control device for an infusion pump, comprising: an acquisition module for acquiring a speed-time curve of the entire peristaltic cycle of the infusion pump at a preset rotational speed; a calculation module for The speed-time curve calculates the average infusion speed of the entire peristaltic cycle; divides the entire peristaltic cycle into n segments on average according to a certain time, and calculates the average infusion speed corresponding to each segment; n is a positive integer greater than 1; The average infusion speed is proportional to the average infusion speed corresponding to each segment, and an acceleration coefficient table is obtained; the adjustment module adjusts the motor by multiplying the average speed of the motor by the coefficient of the acceleration coefficient table to obtain a uniform infusion speed. .

According to a third aspect, an embodiment of the present invention discloses an infusion pump, comprising: a processor and a memory, the processor is coupled to the memory, the memory stores a computer program, and the processor executes the computer The program is used to realize the peristaltic variable speed control method of the infusion pump described in the first aspect.

According to a fourth aspect, an embodiment of the present invention discloses a computer storage medium storing a computer program, and the computer program can be executed by a processor to implement the peristaltic variable speed control method for an infusion pump described in the first aspect.

beneficial effect

The embodiment of the present invention discloses a peristaltic variable speed control method for an infusion pump, by collecting the speed-time curve of the entire peristaltic cycle of the infusion pump according to a preset rotational speed; and calculating the average infusion speed of the entire peristaltic cycle according to the speed-time curve; Divide the entire peristaltic cycle into n segments on average according to a certain time, and calculate the average infusion rate corresponding to each segment; n is a positive integer greater than 1; the average infusion rate of the entire peristaltic cycle is proportional to the average infusion rate corresponding to each segment , to obtain an acceleration coefficient table; by multiplying the average speed of the motor by the coefficient of the acceleration coefficient table to perform variable speed adjustment, a uniform infusion speed is obtained. Compared with the prior art, the present invention enables the infusion pump to perform infusion in a more uniform manner.

Description of drawings

In order to illustrate the specific embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the specific embodiments or the prior art. Obviously, the accompanying drawings in the following description The drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

Fig. 1 is a flow chart of a peristaltic variable speed control method for an infusion pump disclosed in the present embodiment;

Fig. 2 is a kind of schematic diagram of eccentric wheel structure;

Fig. 3 is a kind of schematic diagram of peristaltic pump sheet structure of infusion pump;

Fig. 4 is a single peristaltic cycle infusion speed curve diagram of an infusion tube under a fixed motor speed;

Fig. 5 is the final infusion speed curve diagram of infusion tube under peristaltic variable speed;

FIG. 6 is a schematic structural diagram of a peristaltic variable speed control device for an infusion pump disclosed in this embodiment.

BEST MODE FOR CARRYING OUT THE INVENTION

Optionally, the average infusion rate is obtained by using the following formula: V _avg =Q/t, where: Q is the infusion volume of a complete peristaltic cycle, and t is the time of a complete peristaltic cycle.

Optionally, the following formula is used to obtain the average infusion rate of each segment; V _n =Q _n /t _n , where Q _n is the infusion volume of each segment, and t _n is the time corresponding to each segment.

Optionally, the following formula _is used to obtain the acceleration of the infusion pump: Coen =V _avg /V _n .

Optionally, the following formula is used to obtain a uniform infusion speed: R _n =R _avg *Coen , _{where: R n} _is the motor speed after variable speed adjustment, and R _avg is the average speed of the motor corresponding to the preset infusion speed.

Optionally, the preset rotational speed is 0.0075rad/s.

Optionally, the n segments are 40 segments.

Embodiments of the present invention

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation or a specific orientation. construction and operation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first", "second", and "third" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

In the description of the present invention, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection connection, or integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two components, which can be a wireless connection or a wired connection connect. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

The embodiment of the present invention discloses a peristaltic variable speed control method for an infusion pump. The infusion set is installed on the infusion pump, as shown in FIG. 1 , including:

Step S101, collecting the speed-time curve of the entire peristaltic cycle of the infusion pump at a preset rotational speed;

Step S102, according to the speed time curve, calculate the average infusion speed of the whole peristaltic cycle;

Step S103: Divide the entire peristalsis cycle into n sections on average according to a certain time, and calculate the average infusion speed corresponding to each section; n is a positive integer greater than 1;

Step S104, the average infusion speed of the entire peristaltic cycle is proportional to the average infusion speed corresponding to each section, and an acceleration coefficient table is obtained;

Step S105 , by multiplying the average speed of the motor by the coefficient of the acceleration coefficient table to adjust the speed change to obtain a uniform infusion speed.

It should be noted that, in the method for controlling peristaltic variable speed of an infusion pump disclosed in the embodiment of the present invention, the speed-time curve of the entire peristaltic cycle of the infusion pump is collected according to a preset rotational speed; according to the speed-time curve, the average infusion speed of the entire peristaltic cycle is calculated. ; Divide the whole peristaltic cycle into n sections on average according to a certain time, and calculate the average infusion rate corresponding to each section; n is a positive integer greater than 1; the average infusion rate of the entire peristaltic cycle is proportional to the average infusion rate corresponding to each section speed to obtain an acceleration coefficient table; by multiplying the average speed of the motor by the coefficient of the acceleration coefficient table to adjust the speed change to obtain a uniform infusion speed. Compared with the prior art, the present invention enables the infusion pump to perform infusion in a more uniform manner.

In the specific implementation process, the following formula is used to obtain the average infusion rate: V _avg =Q/t, where: Q is the infusion volume of a complete peristaltic cycle, and t is the time of a complete peristaltic cycle.

In the specific implementation process, the following formula is used to obtain the average infusion rate of each section; V _n =Q _n /t _n , where: Q _n is the infusion volume of each section, and t _n is the time corresponding to each section.

In the specific implementation process, the following formula _is used to obtain the acceleration of the infusion pump: Coen =V _avg /V _n .

In the specific implementation process, the following formula is used to obtain a uniform infusion speed: R _n =R _avg *Coen , _{where: R n} _is the speed of the motor after variable speed adjustment, and R _avg is the average speed of the motor corresponding to the preset infusion speed .

It should be noted that R _avg is relative to a set value, and the user selects a certain parameter on the screen according to the needs of medication, and the parameter represents the infusion volume of the infusion in a certain period of time (for example, the infusion volume required by the patient is 50ml, The time to complete the infusion is 1h), and the system will convert it into the speed required by the motor according to the parameters, which is the speed that is not adjusted by variable speed.

In the specific implementation process, the preset rotational speed is 0.0075rad/s.

In the specific implementation process, the n segment is 40 segments.

Fig. 2 is a kind of schematic diagram of eccentric wheel structure; Fig. 3 is a kind of schematic diagram of peristaltic pump piece structure of infusion pump; Fig. 4 is the single peristaltic cycle infusion speed curve diagram of infusion tube under fixed motor speed; Fig. 5 is infusion tube in Final infusion rate profile under peristaltic variable speed.

As shown in Figure 2 and Figure 3, the structure of the peristaltic pump body of most infusion pumps on the market is shown in Figure 3. The eccentric wheel as shown in Figure 2 is used, so that the pump plate can periodically move perpendicular to the infusion tube, and finally makes The entire peristaltic pump body moves in a cycle similar to a trigonometric function, continuously squeezing the infusion tube, so that the liquid flows forward at a certain speed.

It can be seen from Figure 4 that the infusion speed is approximately the same as the time-integration of the curve at equal intervals, so the speed curve is also close to a similar trigonometric function, and because in order to ensure that the liquid will not flow back, the pump sheet needs to squeeze the infusion tube with a certain amount of interference. , resulting in a period of zero flow rate at the front and the end of the entire peristalsis cycle. There are currently variable speed infusion pumps on the market. However, the time and size of the speed change are relatively rough, and they are all empirical values, so accurate and uniform infusion cannot be obtained.

As shown in FIG. 6 , an embodiment of the present invention discloses a peristaltic variable speed control device for an infusion pump, including: an acquisition module 201, configured to acquire a speed-time curve of the entire peristaltic cycle of the infusion pump at a preset rotational speed; a calculation module 202, It is used to calculate the average infusion speed of the entire peristaltic cycle according to the speed-time curve; divide the entire peristaltic cycle into n segments according to a certain time, and calculate the average infusion speed corresponding to each segment; n is a positive integer greater than 1; The average infusion speed of the peristaltic cycle is proportional to the average infusion speed corresponding to each section, and an acceleration coefficient table is obtained; the adjustment module 203 adjusts the speed of the motor by multiplying the average speed of the motor by the coefficient of the acceleration coefficient table to obtain Uniform infusion rate.

In addition, an embodiment of the present invention also provides an infusion pump, the infusion pump includes a processor and a memory, and the processor implements the following method by executing computer instructions:

Collect the speed-time curve of the entire peristaltic cycle of the infusion pump according to the preset rotation speed; calculate the average infusion speed of the entire peristaltic cycle according to the speed-time curve; divide the entire peristaltic cycle into n sections on average according to a certain time, and calculate the corresponding value of each section. Average infusion rate; n is a positive integer greater than 1; the average infusion rate of the entire peristaltic cycle is proportional to the average infusion rate corresponding to each segment to obtain an acceleration coefficient table; by multiplying the average speed of the motor by the coefficient of the acceleration coefficient table Make variable speed adjustments for an even infusion rate.

Those skilled in the art can understand that all or part of the processes in the methods of the above embodiments can be completed by instructing the relevant hardware through a computer program, and the program can be stored in a computer-readable storage medium, and the program can be executed when the program is executed , may include the flow of the above-mentioned method embodiments. The storage medium may be a magnetic disk, an optical disk, a read only memory (ROM), or a random access memory (RAM) or the like. The computer processor is used for executing the computer program stored in the storage medium to realize the following methods:

Collect the speed-time curve of the entire peristaltic cycle of the infusion pump according to the preset rotation speed; calculate the average infusion speed of the entire peristaltic cycle according to the speed-time curve; divide the entire peristaltic cycle into n segments on average according to a certain time, and calculate the corresponding value of each segment. Average infusion rate; n is a positive integer greater than 1; the average infusion rate of the entire peristaltic cycle is proportional to the average infusion rate corresponding to each segment to obtain an acceleration coefficient table; by multiplying the average speed of the motor by the coefficient of the acceleration coefficient table Make variable speed adjustments for an even infusion rate.

Working principle: a peristaltic variable speed control method for an infusion pump disclosed in the embodiment of the present invention collects the speed-time curve of the entire peristaltic cycle of the infusion pump according to the preset rotational speed; calculates the average infusion speed of the entire peristaltic cycle according to the speed-time curve; The whole peristaltic cycle is evenly divided into n sections according to a certain time, and the average infusion speed corresponding to each section is calculated; n is a positive integer greater than 1; the average infusion speed of the entire peristaltic cycle is proportional to the average infusion speed corresponding to each section, Obtain an acceleration coefficient table; make variable speed adjustments by multiplying the average speed of the motor by the coefficient of the acceleration coefficient table to obtain a uniform infusion rate. Compared with the prior art, the present invention enables the infusion pump to perform infusion in a more uniform manner.

Obviously, the above-mentioned embodiments are only examples for clear description, and are not intended to limit the implementation manner. For those of ordinary skill in the art, changes or modifications in other different forms can also be made on the basis of the above description. There is no need and cannot be exhaustive of all implementations here. And the obvious changes or changes derived from this are still within the protection scope of the present invention.

Industrial Applicability

The present application has industrial applicability.

Claims

A peristaltic variable speed control method for an infusion pump, comprising installing an infusion device on the infusion pump, comprising:

Obtain the speed-time curve of the entire peristaltic cycle of the infusion pump according to the preset rotational speed;

According to the speed-time curve, calculate the average infusion speed of the whole peristaltic cycle;

Divide the entire peristaltic cycle into n segments on average according to a certain time, and calculate the average infusion speed corresponding to each segment; n is a positive integer greater than 1;

The average infusion speed of the whole peristaltic cycle is proportional to the average infusion speed corresponding to each segment, and an acceleration coefficient table is obtained;

The motor is adjusted for variable speed by multiplying the average speed of the motor by the coefficient of the acceleration coefficient table to obtain a uniform infusion rate.
Infusion pump peristaltic variable speed control method according to claim 1, is characterized in that, adopts following formula to obtain described average infusion speed:

V avg =Q/t, where: Q is the infusion volume of a complete peristaltic cycle, and t is the time of a complete peristaltic cycle.
The peristaltic variable speed control method of an infusion pump according to claim 1, wherein the following formula is adopted to obtain the average infusion speed of each section;

V n =Q n /t n , where: Q n is the infusion volume of each section, and t n is the time corresponding to each section.
Infusion pump peristaltic variable speed control method according to claim 1, is characterized in that, adopts following formula to obtain the acceleration of infusion pump:

Coen =V avg /V n .
Infusion pump peristaltic variable speed control method according to claim 1, is characterized in that, adopts following formula to obtain uniform infusion speed:

R n =R avg *Coen , where: R n is the rotational speed of the motor after variable speed adjustment, and R avg is the average rotational speed of the motor corresponding to the preset infusion speed.
The peristaltic variable speed control method of an infusion pump according to any one of claims 1-5, wherein the preset rotational speed is 0.0075rad/s.
The peristaltic variable speed control method of an infusion pump according to claim 1, wherein the n segments are 40 segments.
A peristaltic variable speed control device for an infusion pump, comprising:

an acquisition module for acquiring the speed-time curve of the entire peristaltic cycle of the infusion pump at a preset rotational speed;

The calculation module is used to calculate the average infusion rate of the entire peristaltic cycle according to the speed-time curve; the entire peristaltic cycle is divided into n segments on average according to a certain time, and the average infusion rate corresponding to each segment is calculated; n is a positive integer greater than 1 ; The average infusion speed of the whole peristaltic cycle is proportional to the average infusion speed corresponding to each segment, and an acceleration coefficient table is obtained;

The adjustment module adjusts the speed of the motor by multiplying the average speed of the motor by the coefficient of the acceleration coefficient table, so as to obtain a uniform infusion speed.
An infusion pump, comprising: a processor and a memory, the processor is coupled to the memory, the memory stores a computer program, and the processor executes the computer program to realize the method as claimed in claim 1 -7 The peristaltic variable speed control method of any one of the infusion pumps.
A computer-readable storage medium, characterized in that, a computer program is stored, and the computer program can be executed by a processor to implement the peristaltic variable speed control method of an infusion pump according to any one of claims 1-7.