CN114949430A - Control method and device for medical infusion pump and flushing system - Google Patents
Control method and device for medical infusion pump and flushing system Download PDFInfo
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- CN114949430A CN114949430A CN202210701674.9A CN202210701674A CN114949430A CN 114949430 A CN114949430 A CN 114949430A CN 202210701674 A CN202210701674 A CN 202210701674A CN 114949430 A CN114949430 A CN 114949430A
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- 238000001802 infusion Methods 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000011010 flushing procedure Methods 0.000 title claims abstract description 27
- 230000000903 blocking effect Effects 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 230000002262 irrigation Effects 0.000 claims description 2
- 238000003973 irrigation Methods 0.000 claims description 2
- 238000010926 purge Methods 0.000 claims 1
- 230000008569 process Effects 0.000 abstract description 10
- 238000005259 measurement Methods 0.000 abstract description 5
- 239000007788 liquid Substances 0.000 description 17
- 239000008280 blood Substances 0.000 description 15
- 210000004369 blood Anatomy 0.000 description 15
- 239000012530 fluid Substances 0.000 description 10
- 230000017531 blood circulation Effects 0.000 description 5
- 210000005240 left ventricle Anatomy 0.000 description 5
- 210000000709 aorta Anatomy 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002572 peristaltic effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000036962 time dependent Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M3/00—Medical syringes, e.g. enemata; Irrigators
- A61M3/02—Enemata; Irrigators
- A61M3/0204—Physical characteristics of the irrigation fluid, e.g. conductivity or turbidity
- A61M3/0216—Pressure
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M3/00—Medical syringes, e.g. enemata; Irrigators
- A61M3/02—Enemata; Irrigators
- A61M3/0202—Enemata; Irrigators with electronic control means or interfaces
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M3/00—Medical syringes, e.g. enemata; Irrigators
- A61M3/02—Enemata; Irrigators
- A61M3/0204—Physical characteristics of the irrigation fluid, e.g. conductivity or turbidity
- A61M3/022—Volume; Flow rate
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M3/00—Medical syringes, e.g. enemata; Irrigators
- A61M3/02—Enemata; Irrigators
- A61M3/0279—Cannula; Nozzles; Tips; their connection means
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/33—Controlling, regulating or measuring
- A61M2205/3331—Pressure; Flow
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/33—Controlling, regulating or measuring
- A61M2205/3331—Pressure; Flow
- A61M2205/3334—Measuring or controlling the flow rate
Abstract
One or more embodiments of the present disclosure provide a method, an apparatus, and a flushing system for controlling a medical infusion pump, where an outlet pressure value of a tube of the medical infusion pump is obtained, when the outlet pressure value is not equal to a preset target pressure value, a target outlet pressure value is adjusted, an adjustment pulse signal frequency of a motor of the medical infusion pump is determined according to the target outlet pressure value, and a pulse signal is output to the motor according to the adjustment pulse signal frequency, so that the motor adjusts a rotation speed under the control of the pulse signal; when the outlet pressure value is equal to the target pressure value, the current pulse signal frequency is kept to output a pulse signal to the motor, and the accurate control of the pressure and the flow can be realized through the feedback control process; meanwhile, the flow value in the pipe body can be determined according to the outlet pressure value and the pulse signal frequency of the motor, and flow measurement is achieved.
Description
Technical Field
One or more embodiments of the present disclosure relate to the technical field of medical devices, and in particular, to a method and an apparatus for controlling a medical infusion pump, and a flushing system.
Background
Medical infusion pumps are often used to flush and clean specific areas. Under some scenes, in order to achieve good treatment effect by matching with medical equipment, the requirement on the flow control precision of flushing fluid of a medical infusion pump is high. Currently, a flow meter can be used to measure the flush fluid flow rate of a flush pump, but the flush fluid flow rate cannot be accurately controlled.
Disclosure of Invention
In view of this, an object of one or more embodiments of the present disclosure is to provide a method and a device for controlling a medical infusion pump, which can accurately control the flow rate of a flushing liquid.
In view of the above, one or more embodiments of the present specification provide a control method for a medical infusion pump, including:
acquiring an outlet pressure value of a tube body of the medical infusion pump;
when the outlet pressure value is not equal to a preset target pressure value, adjusting the target outlet pressure value according to a pressure difference value between the outlet pressure value and the target pressure value, determining the frequency of an adjusting pulse signal of a motor of the medical infusion pump according to the target outlet pressure value, and outputting a pulse signal to the motor according to the frequency of the adjusting pulse signal so that the motor adjusts the rotating speed under the control of the pulse signal; when the outlet pressure value is equal to the target pressure value, keeping the current frequency of the adjusting pulse signal to output a pulse signal to the motor;
and determining the flow value in the pipe body according to the outlet pressure value and the frequency of the adjusting pulse signal.
Optionally, when the frequency of the adjusting pulse signal is Hz n Determining a flow value within the tube
The method comprises the following steps:
wherein ,
for the pipe body to regulate the frequency of the pulse signal to be Hz under the condition of no pressure n The flow value of time, k is the frequency of the regulating pulse signal Hz n The coefficient of the time-dependent determination,
for adjusting the frequency of the pulse signal to be Hz n The outlet pressure value of time.
Optionally, when the frequency of the adjusting pulse signal is Hz n Adjusted to Hz n+1 The method of determining the flow value in the pipe body is:
wherein Hz is the current pulse signal frequency of the motor,
for adjusting the frequency of the pulse signal to be Hz n+1 The corresponding outlet pressure value is obtained by the pressure sensor,
for regulating the frequency of the pulse signal to be Hz n+1 The flow value in the pipe body.
Optionally, in a normal flushing state, the target pressure value ranges from 200mmHg to 1500mmHg, and the flow rate value ranges from 2ml/hr to 30 ml/hr.
Optionally, the error range of the flow value is less than ± 0.5ml/hr or less than ± 10%.
Optionally, the method further includes:
when the outlet pressure value is larger than the upper limit of the range of the target pressure value, outputting a blocking alarm signal;
and outputting a leakage alarm signal when the outlet pressure value is smaller than the lower limit of the range of the target pressure value.
Optionally, in the exhaust flushing state, the target pressure value is 0, and the flow rate value is 200 ml/hr.
Optionally, the error range of the flow rate value is less than ± 5%.
An embodiment of the present specification further provides a control device for a medical infusion pump, including:
the acquisition module is used for acquiring the outlet pressure value of the tube body of the medical infusion pump;
the adjusting module is used for adjusting a target outlet pressure value according to a pressure difference value between the outlet pressure value and the target pressure value when the outlet pressure value is not equal to a preset target pressure value, determining an adjusting pulse signal frequency of a motor of the medical infusion pump according to the target outlet pressure value, and outputting a pulse signal to the motor according to the adjusting pulse signal frequency so that the motor can adjust the rotating speed under the control of the pulse signal; when the outlet pressure value is equal to the target pressure value, keeping the current frequency of the adjusting pulse signal to output a pulse signal to the motor;
and the calculation module is used for determining the flow value in the pipe body according to the outlet pressure value and the frequency of the adjusting pulse signal.
The embodiment of the specification also provides a medical irrigation system which comprises the control device of the medical infusion pump.
As can be seen from the above, according to the control method, the control device and the flushing system for the medical infusion pump provided in one or more embodiments of the present specification, accurate control of pressure and flow can be achieved by obtaining the outlet pressure value of the tube body of the medical infusion pump and performing feedback control adjustment on the motor rotation speed according to the outlet pressure value and the target pressure value; meanwhile, the flow value in the pipe body can be determined according to the outlet pressure value and the pulse signal frequency in the adjusting process, and flow measurement is achieved.
Drawings
In order to more clearly illustrate one or more embodiments or prior art solutions of the present specification, the drawings that are needed in the description of the embodiments or prior art will be briefly described below, and it is obvious that the drawings in the following description are only one or more embodiments of the present specification, and that other drawings may be obtained by those skilled in the art without inventive effort from these drawings.
FIG. 1 is a schematic flow chart of a method according to one or more embodiments of the present disclosure;
fig. 2 is a schematic view of a connection structure of a medical infusion pump and a blood pump according to one or more embodiments of the present disclosure;
FIG. 3 is a block diagram of an apparatus according to one or more embodiments of the present disclosure.
Detailed Description
For the purpose of promoting a better understanding of the objects, aspects and advantages of the present disclosure, reference is made to the following detailed description taken in conjunction with the accompanying drawings.
It is to be understood that unless otherwise defined, technical or scientific terms used in one or more embodiments of the present disclosure should have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of "first," "second," and similar terms in one or more embodiments of the specification is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
Among the correlation technique, medical transfer pump (for example, the peristaltic pump) is including the pump body, the pump head, body, motor and controller etc. sets up controller and motor in the pump body, the output shaft rotor of motor, and the rotor outward flange sets up a plurality of gyro wheels, and the pump head is passed to body one end, and the output shaft of controller control motor rotates, drives the gyro wheel and rotates, and the interior flush fluid of gyro wheel extrusion body flows, through control motor rotational speed, can control the flow of flush fluid.
The blood pump is used as one of the intervention type left ventricle auxiliary systems and comprises a conduit, a motor, an impeller, a blood flow channel and other parts, when the blood pump is used, the blood pump is inserted into a left ventricle through an aorta, the blood outlets of the conduit, the motor, the impeller and the blood flow channel are positioned at the aorta, the blood inlet of the blood flow channel is positioned in the left ventricle, the motor drives the impeller to rotate to generate negative pressure, blood positioned in the left ventricle is sucked into the aorta, and the blood circulation of the heart is assisted.
In some scenarios, for example, in an interventional left ventricle assist system, a medical infusion pump is connected to a blood pump, so that a flushing fluid enters a motor of the blood pump through a conduit and then flows into an aorta, the motor is sealed in a liquid manner, and the motor is prevented from being failed due to the fact that blood enters the motor through a gap. In order to ensure the liquid sealing effect, the pressure of the final outlet of the flushing liquid (hereinafter referred to as target pressure) needs to be greater than or equal to the blood flow pressure, and meanwhile, in order to prevent excessive flushing liquid from entering the human body, the flow of the flushing liquid needs to be accurately measured and controlled. In the process of implementing the present application, the applicant finds that during the flushing process of the flushing liquid, the flushing liquid in the pipe body has a certain pressure, and a certain relation exists between the pressure and the liquid flow rate, and the flow rate can be determined according to the relation between the pressure and the flow rate by detecting the pressure in the pipe body.
In view of this, the present application provides a control method for a medical infusion pump, in which a pressure sensor is disposed at an outlet of a tube body and is used for acquiring a pressure of a liquid at the outlet of the tube body. When the acquired pressure is different from the target pressure, the rotating speed of the motor is adjusted by using the controller, so that the liquid flow in the pipe body is adjusted, the pressure changes along with the flow change, when the adjusted pressure reaches the target pressure, the flow corresponding to the target pressure is the target flow, and the control of the pressure and the flow can be realized; meanwhile, in the process, the flow value can be calculated according to the pressure and the rotating speed of the motor, so that the flow measurement is realized.
Hereinafter, the technical means of the present application will be described in further detail by specific examples.
As shown in fig. 1 and 2, one or more embodiments of the present disclosure provide a method for controlling a medical infusion pump, including:
s101: acquiring an outlet pressure value of a tube body of the medical infusion pump;
in this embodiment, medical transfer pump includes pump head, body, controller and motor etc, and the entry end and the flush fluid source intercommunication of body, the pump head is passed to the other end of body, and the motor rotates the gyro wheel that drives on the rotor and rotates, and the flush fluid in the gyro wheel rotation in-process extrusion body flows out by the exit end of body to the gyro wheel. And a pressure sensor is arranged at the position of the pipe body close to the outlet end and used for acquiring the outlet pressure value of the pipe body.
S102: when the outlet pressure value is not equal to a preset target pressure value, adjusting the target outlet pressure value according to a pressure difference value between the outlet pressure value and the target pressure value, determining the frequency of an adjusting pulse signal of a motor of the medical infusion pump according to the target outlet pressure value, and outputting the pulse signal to the motor according to the frequency of the adjusting pulse signal, so that the motor adjusts the rotating speed under the control of the pulse signal; when the outlet pressure value is equal to the target pressure value, keeping the current frequency of the adjusting pulse signal to output a pulse signal to the motor;
in this embodiment, the signal output end of the pressure sensor is connected with the signal input end of the controller, and the control signal output end of the controller is connected with the control end of the motor. In the flushing process, the pressure sensor collects the outlet pressure value of the pipe body in real time, the outlet pressure value is compared with a preset target pressure value, and when the outlet pressure value is not equal to the target pressure value, the controller adjusts the target outlet pressure value according to the pressure difference value between the outlet pressure value and the target pressure value. In some modes, a corresponding relation table of an outlet pressure value and an adjusting pulse signal frequency can be established in advance, a target outlet pressure value is determined after a controller calculates a pressure difference value, the corresponding relation table is inquired according to the target outlet pressure value, a corresponding adjusting pulse signal frequency is determined, a pulse signal is output to a motor according to the adjusting pulse signal frequency, the motor adjusts the rotating speed under the control of the pulse signal, after the rotating speed is adjusted, the liquid flow in the pipe body changes, and the outlet pressure value of the pipe body changes accordingly; in the feedback control process, when the outlet pressure value acquired by the pressure sensor is equal to the target pressure value, the rotating speed of the motor is stopped being adjusted, the current adjusting pulse signal frequency is kept, the pulse signal is output to the motor, the liquid pressure in the pipe body reaches the target pressure value at the current rotating speed of the motor, and the liquid flow in the pipe body reaches the target flow. Through the feedback control process, accurate control of pressure and flow can be achieved, and practicability is high.
In some modes, the motor is a stepping motor, each time a pulse signal is input, a rotor of the stepping motor rotates for an angle or advances one step, under the control of the pulse signals with different frequencies, the rotating speeds of the stepping motor are different, the higher the frequency of the pulse signal is, the higher the rotating speed is, and the higher the rotating speed is when the stepping motor is applied to a medical infusion pump, and the higher the rotating speed of the motor is, the higher the flow rate of flushing liquid is. Therefore, when the outlet pressure value is not equal to the target pressure value, the controller determines the adjusting pulse signal frequency for adjusting the rotating speed of the motor according to the pressure difference value between the outlet pressure value and the target pressure value, the pulse signal is output to the motor according to the adjusting pulse signal frequency, the motor adjusts the rotating speed under the control of the pulse signal, and after the rotating speed is changed, the flow and the pressure in the pipe body are changed along with the rotating speed, so that the adjusting control of the flow and the pressure is realized.
S103: and determining the flow value in the pipe body according to the outlet pressure value and the frequency of the adjusting pulse signal.
In this embodiment, in the feedback control process of pressure, can calculate the flow value that obtains the washing liquid in the body according to the outlet pressure value and the adjustment signal frequency of body to need not to set up the measurement that the flowmeter can realize the flow, can reduce cost.
In some embodiments, the method comprisesAs can be seen from the principle, the pressure and the flow rate of the liquid are inversely proportional, and within a range where the amount of pressure change is sufficiently small, the pressure and the flow rate can be approximated to be linear. Thus, when the frequency of the pulse signal is adjusted to be Hz n Determining the flow rate value in the pipe body
The method comprises the following steps:
wherein ,
for pulse signal frequency of Hz n The value of the flow rate at the time of the flow,
for pulse signal frequency of Hz n The outlet pressure value of time, k is the frequency of the pulse signal Hz n The coefficients determined by fitting the test data are then determined,
the pipe body is under the condition of no pressure, and the frequency of the pulse signal is Hz n The flow value of time.
Flow in the pipe body when the motor rotates under the pulse signal frequency Hz under the condition of no pressure
Comprises the following steps:
where a is the number of subdivisions of the motor, b is the step angle, c is the minimum flow value allowed to pass by the tube, d is the minimum rotational speed of the motor, and Hz is the current pulse signal frequency of the motor taken, a known quantity that can be taken.
In some embodiments, the signal is pulsedWhen the variation of the signal frequency is small enough, the corresponding flow variation is approximately linear when the pulse signal frequency is changed. Thereby adjusting the frequency Hz of the pulse signal n Adjusted to Hz n+1 In the course of variation of (2), at [ Hz n ,Hz n+1 ]At any pulse signal frequency Hz in the interval, the flow value in the pipe body is as follows:
wherein ,
for pulse signal frequency of Hz n+1 The value of the outlet pressure at the time,
for pulse signal frequency of Hz n+1 The flow value in the time tube body can be obtained by calculation according to the formulas (1) and (2). In some manner, Hz n+1 Greater than Hz n 。
In some embodiments, as shown in fig. 2, the medical infusion pump is connected to the blood pump, and during normal flushing, the blood in the blood pump has a certain pressure, and in order to ensure normal flushing, the pressure of the flushing fluid should be greater than or equal to the pressure of the blood. In some modes, the range of the settable target pressure value is 200 mmHg-1500 mmHg, the range of the flow value of the flushing fluid in the pipe body is 2 ml/hr-30 ml/hr within the range of the target pressure value, the specific value of the target pressure value can be selected and set according to the structure and performance of the used medical infusion pump, the applied flushing scene and other conditions, and the specific value is not limited.
Considering the factors of loss and the like of the medical infusion pump in the using process, a certain error may exist in the calculated flow value, and the error range of the calculated flow value is less than +/-0.5 ml/hr or less than +/-10%, whichever is larger. For example, the calculated flow value is 2ml/hr, and the corresponding actual flow range is 1.5ml/hr-2.5ml/hr in consideration of error factors; the calculated flow value is 30ml/hr, and the corresponding actual flow range is 27ml/hr-33ml/hr in consideration of error factors.
In some embodiments, during normal flushing, when the collected outlet pressure value is greater than the upper limit of the range of the target pressure value, and after the controller adjusts the rotation speed of the motor, the outlet pressure value is still greater than the upper limit of the range of the target pressure value, it is determined that the medical infusion pump is blocked, and the controller outputs a blocking alarm signal. When the outlet pressure value is smaller than the lower limit of the range of the target pressure value, and after the rotating speed of the motor is adjusted by the controller, the outlet pressure value is still smaller than the lower limit of the range of the target pressure value, and the controller outputs a leakage alarm signal. Like this, through the measurement of body outlet pressure, can realize the pipeline and detect unusually, effectively reduce medical risk, avoid the instrument to damage.
In some embodiments, before the medical infusion pump is connected with the blood pump, the tube body can be exhausted and flushed to exhaust gas in the tube body. When the pipe body is exhausted and washed, no pressure exists in the pipe body, namely the target pressure value is 0, and the flow value in the pipe body is 200ml/hr under the no-pressure condition. Wherein, the error range of the flow value is less than +/-5 percent, namely the actual flow range is 190ml/hr-210 ml/hr.
In some modes, the medical infusion pump can be a disposable flushing pump, and the materials of a tube body and the like of the medical infusion pump are the same as those of a disposable syringe, so that the disposable use cost is not high.
As shown in fig. 3, an embodiment of the present specification further provides a control device for a medical infusion pump, including:
the acquisition module is used for acquiring the outlet pressure value of the tube body of the medical infusion pump;
the adjusting module is used for adjusting the target outlet pressure value according to the pressure difference between the outlet pressure value and the target pressure value when the outlet pressure value is not equal to the preset target pressure value, determining the adjusting pulse signal frequency of the motor of the medical infusion pump according to the target outlet pressure value, and outputting a pulse signal to the motor according to the adjusting pulse signal frequency so that the motor can adjust the rotating speed under the control of the pulse signal; when the outlet pressure value is equal to the target pressure value, keeping the current frequency of the adjusting pulse signal to output a pulse signal to the motor;
and the calculation module is used for determining the flow value in the pipe body according to the outlet pressure value and the frequency of the adjusting pulse signal.
For convenience of description, the above devices are described as being divided into various modules by functions, and are described separately. Of course, the functionality of the various modules may be implemented in the same one or more pieces of software and/or hardware in implementing one or more embodiments of the present description.
The apparatus of the foregoing embodiment is used to implement the corresponding method in the foregoing embodiment, and has the beneficial effects of the corresponding method embodiment, which are not described herein again.
With reference to fig. 2, an embodiment of the present disclosure further provides a medical flushing system, which includes a medical infusion pump and a control device thereof, and the control device of the medical infusion pump can accurately control and measure pressure and flow, and has a simple structure, controllable cost, and strong practicability.
Those of ordinary skill in the art will understand that: the discussion of any embodiment above is meant to be exemplary only, and is not intended to intimate that the scope of the disclosure, including the claims, is limited to these examples; within the spirit of the present disclosure, features from the above embodiments or from different embodiments may also be combined, steps may be implemented in any order, and there are many other variations of different aspects of one or more embodiments of the present description as described above, which are not provided in detail for the sake of brevity.
In addition, well-known power/ground connections to Integrated Circuit (IC) chips and other components may or may not be shown in the provided figures, for simplicity of illustration and discussion, and so as not to obscure one or more embodiments of the disclosure. Furthermore, devices may be shown in block diagram form in order to avoid obscuring the understanding of one or more embodiments of the present description, and this also takes into account the fact that specifics with respect to implementation of such block diagram devices are highly dependent upon the platform within which the one or more embodiments of the present description are to be implemented (i.e., specifics should be well within purview of one skilled in the art). Where specific details (e.g., circuits) are set forth in order to describe example embodiments of the disclosure, it should be apparent to one skilled in the art that one or more embodiments of the disclosure can be practiced without, or with variation of, these specific details. Accordingly, the description is to be regarded as illustrative instead of restrictive.
While the present disclosure has been described in conjunction with specific embodiments thereof, many alternatives, modifications, and variations of these embodiments will be apparent to those of ordinary skill in the art in light of the foregoing description. For example, other memory architectures (e.g., dynamic ram (dram)) may use the discussed embodiments.
It is intended that the one or more embodiments of the present specification embrace all such alternatives, modifications and variations as fall within the broad scope of the appended claims. Therefore, any omissions, modifications, substitutions, improvements, and the like that may be made without departing from the spirit and principles of one or more embodiments of the present disclosure are intended to be included within the scope of the present disclosure.
Claims (10)
1. A control method of a medical infusion pump is characterized by comprising the following steps:
acquiring an outlet pressure value of a tube body of the medical infusion pump;
when the outlet pressure value is not equal to a preset target pressure value, adjusting the target outlet pressure value according to a pressure difference value between the outlet pressure value and the target pressure value, determining the frequency of an adjusting pulse signal of a motor of the medical infusion pump according to the target outlet pressure value, and outputting a pulse signal to the motor according to the frequency of the adjusting pulse signal so that the motor adjusts the rotating speed under the control of the pulse signal; when the outlet pressure value is equal to the target pressure value, keeping the current frequency of the adjusting pulse signal to output a pulse signal to the motor;
and determining the flow value in the pipe body according to the outlet pressure value and the frequency of the adjusting pulse signal.
2. According to claimThe method of claim 1, wherein the modulation pulse signal frequency is Hz n Determining a flow value in said pipe
The method comprises the following steps:
wherein ,
for the pipe body to regulate the frequency of the pulse signal to be Hz under the condition of no pressure n The flow value of time, k is the frequency of the regulating pulse signal Hz n The time is a predetermined coefficient of the time,
for adjusting the frequency of the pulse signal to be Hz n The outlet pressure value of time.
3. The method of claim 2, wherein the frequency of the modulated pulse signal is adjusted from Hz n Adjusted to Hz n+1 The method of determining the flow value in the pipe body is:
wherein Hz is the current pulse signal frequency of the motor,
for adjusting the frequency of the pulse signal to be Hz n+1 The corresponding outlet pressure value is obtained by the pressure sensor,
for adjusting the frequency of the pulse signal to be Hz n+1 The flow value in the pipe body.
4. The method of claim 1, wherein the target pressure value ranges from 200mmHg to 1500mmHg and the flow rate value ranges from 2ml/hr to 30ml/hr in a normal flushing state.
5. The method of claim 4, wherein the error range of the flow rate value is less than ± 0.5ml/hr or less than ± 10%.
6. The method of claim 4, further comprising:
when the outlet pressure value is larger than the upper limit of the range of the target pressure value, outputting a blocking alarm signal;
and outputting a leakage alarm signal when the outlet pressure value is smaller than the lower limit of the range of the target pressure value.
7. The method of claim 1, wherein the target pressure value is 0 and the flow value is 200ml/hr in a vent purge state.
8. The method of claim 7, wherein the error range of the flow rate value is less than ± 5%.
9. A control device for a medical infusion pump, comprising:
the acquisition module is used for acquiring the outlet pressure value of the tube body of the medical infusion pump;
the adjusting module is used for adjusting a target outlet pressure value according to a pressure difference value between the outlet pressure value and the target pressure value when the outlet pressure value is not equal to a preset target pressure value, determining an adjusting pulse signal frequency of a motor of the medical infusion pump according to the target outlet pressure value, and outputting a pulse signal to the motor according to the adjusting pulse signal frequency so that the motor can adjust the rotating speed under the control of the pulse signal; when the outlet pressure value is equal to the target pressure value, keeping the current frequency of the adjusting pulse signal to output a pulse signal to the motor;
and the calculation module is used for determining the flow value in the pipe body according to the outlet pressure value and the frequency of the adjusting pulse signal.
10. A medical irrigation system comprising a control device as claimed in claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210701674.9A CN114949430B (en) | 2022-06-20 | 2022-06-20 | Control method, device and flushing system of medical infusion pump |
Applications Claiming Priority (1)
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| CN115227964A (en) * | 2022-09-21 | 2022-10-25 | 深圳核心医疗科技有限公司 | Flow velocity control method and device |
| CN116077810A (en) * | 2023-04-11 | 2023-05-09 | 深圳核心医疗科技股份有限公司 | Control method and device of flushing device |
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| CN114949430B (en) | 2023-06-09 |
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