CN114259620A

CN114259620A - Method for judging state of infusion pipeline and related equipment

Info

Publication number: CN114259620A
Application number: CN202111088162.1A
Authority: CN
Inventors: 杨韬睿; 左鹏飞; 涂有强
Original assignee: Shenzhen Mindray Scientific Co Ltd
Current assignee: Shenzhen Mindray Scientific Co Ltd
Priority date: 2020-09-16
Filing date: 2021-09-16
Publication date: 2022-04-01
Anticipated expiration: 2041-09-16
Also published as: CN114259620B

Abstract

The embodiment of the invention discloses a method for judging the state of an infusion pipeline and related equipment, wherein the state of the infusion pipeline is detected according to the pressure characteristic value variable quantity at the current moment and a first pressure characteristic value variable quantity threshold value, so that the judgment speed of the state of the infusion pipeline can be effectively improved, and compared with the prior art, the infusion safety of a patient can be effectively guaranteed; and at least one of the pressure characteristic value variable quantity, the blocking duration and the blocking fluid quantity in the blocking state is output outwards by determining the blocking duration and the blocking fluid quantity of the blocking state, so that medical staff can know the state of the infusion pipeline in time conveniently, and the working efficiency of the medical staff is improved.

Description

Method for judging state of infusion pipeline and related equipment

Technical Field

The invention relates to the technical field of infusion, in particular to a method for judging the state of an infusion pipeline and related equipment.

Background

Infusion pumps are commonly used in clinics for precise flow drug infusion by squeezing infusion tubes or pushing syringes to achieve the infusion process. Infusion pumps typically have an occlusion alarm function, but the alarm threshold (e.g., pressure threshold) for the occlusion alarm function is typically set higher. When vital sign maintenance medication is infused into a patient, if an infusion line becomes occluded, it often takes a longer time to trigger an occlusion alarm due to the higher occlusion pressure level or lower flow rate. If no drug is infused into the patient for a long time in the occluded state, treatment is delayed if not, and life risks are generated if not. Therefore, improvements to the above situation are needed.

Disclosure of Invention

The embodiment of the invention provides a method for judging the state of a transfusion pipeline and related equipment, which can improve the speed of judging the state of a blocking.

In a first aspect, an embodiment of the present invention provides a method for determining a state of an infusion line, which is applied to an infusion apparatus, where the infusion apparatus includes an infusion pump, an infusion apparatus, and an infusion line, where the infusion pump is configured to apply pressure to the infusion apparatus to directionally move a fluid substance in the infusion apparatus in the infusion line;

the method comprises the following steps:

acquiring a pressure characteristic value of the infusion pipeline according to a first time interval, wherein the pressure characteristic value represents pressure change in the infusion pipeline;

acquiring pressure characteristic value variation corresponding to the pressure characteristic value in a second time interval according to the second time interval, wherein the second time interval is greater than or equal to the first time interval;

when the pressure characteristic value variation at the current moment is larger than or equal to a first pressure characteristic value variation threshold, determining that the state of the infusion pipeline is a blocking state; the first pressure characteristic value variation threshold is obtained by calculating according to a first number of pressure characteristic value variations in advance before the current moment;

determining the blocking duration of the blocking state of the infusion pipeline, and determining the amount of blocking fluid according to the blocking duration and the flow of the fluid substance;

outputting at least one of the amount of change in the pressure characteristic value when the valve is in the blocking state, the blocking duration, and the amount of blocking fluid.

In a second aspect, an embodiment of the present invention provides an infusion pump, where the infusion pump is used with an infusion line, where the infusion line includes an infusion apparatus and/or an infusion tube, and the infusion pump includes:

a drive mechanism configured to apply pressure to the infusion line to directionally move fluid matter in the infusion line;

a pressure sensor configured to detect a pressure characteristic value related to pressure inside the infusion pipeline;

a memory for storing executable program instructions;

a processor for executing the program instructions stored in the memory, causing the processor to perform the steps of:

outputting at least one of a real-time pressure characteristic value, a pressure characteristic value variation when in a blocking state, the blocking duration, and the amount of blocking fluid;

a display for displaying at least one of a real-time pressure characteristic, a pressure characteristic variation when in an occlusion state, the occlusion duration, and the amount of occluding fluid.

In a third aspect, embodiments of the present invention provide an infusion device comprising:

the infusion pipeline comprises an infusion device and/or an infusion tube;

infusion pump, with the infusion pipeline is supporting to be used, infusion pump includes:

a memory for storing executable program instructions;

In the embodiment of the invention, the state of the infusion pipeline is detected according to the pressure characteristic value variation at the current moment and the first pressure characteristic value variation threshold value, so that the judgment speed of the state of the infusion pipeline can be effectively improved, and compared with the prior art, the infusion safety of a patient can be effectively guaranteed; and at least one of the pressure characteristic value variable quantity, the blocking duration and the blocking fluid quantity in the blocking state is output outwards by determining the blocking duration and the blocking fluid quantity of the blocking state, so that medical staff can know the state of the infusion pipeline in time conveniently, and the working efficiency of the medical staff is improved.

In addition, the embodiment of the invention also updates the threshold of the variation of the first pressure characteristic value according to the variation of the stored pressure characteristic value, thereby effectively ensuring the judgment accuracy of the state of the infusion pipeline.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic diagram of a peristaltic squeezing mechanism of an infusion pump according to an embodiment of the present invention;

FIG. 2 is a schematic view of a drive mechanism for a syringe pump according to an embodiment of the present invention;

FIG. 3 is a schematic flow chart of a method for determining a state of an infusion line according to an embodiment of the present invention;

FIG. 4 is a schematic flow chart of a method for determining a state of an infusion line according to an embodiment of the present invention;

FIG. 5 is a schematic diagram illustrating a pressure variation of a method for determining a state of an infusion line according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a device for determining a state of an infusion pipeline according to an embodiment of the present invention;

fig. 7 is a schematic block diagram of an infusion pump provided by an embodiment of the present invention.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

It should be understood that the terms "first," "second," and the like in the description and claims of this application and in the drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by the person skilled in the art that the described embodiments of the invention can be combined with other embodiments.

The infusion device comprises an infusion pump and an infusion line, the infusion line comprising an infusion set and/or an infusion tube, the infusion pump being configured to apply pressure to the infusion line to move the fluid substance directionally in the infusion line. The infusion pump may be any medical device that performs an infusion operation set by a user according to a fluid substance configured by the user and controllably delivers the configured fluid substance (e.g., medical fluid) into a patient, including but not limited to infusion pumps, syringe pumps, and the like. The infusion pump can be used with infusion tubing (e.g., infusion tubing, infusion set such as a syringe). When the infusion pump is an injection pump and the corresponding infusion apparatus is an injector, the infusion pipeline is the injector. When the injector is connected with an infusion extension tube, the infusion pipeline is the injector and the infusion extension tube. When the infusion pump is an infusion pump, the corresponding infusion apparatus is an infusion tube, and the infusion pipeline at the moment is the infusion tube.

In some embodiments, as shown in fig. 7, the infusion pump includes a processor 720, a memory 730, a drive mechanism 740 (drive mechanism 740 includes, for example, a power drive circuit, a power device), a pressure sensor 710, and a display 750, which communicate via one or more communication buses or signal lines. The processor 720 drives the power device through the power driving circuit, so that the power device can controllably move under the driving of the processor, and in the moving process, the control object (such as a peristaltic squeezing mechanism or a push-pull box) is driven to move through one or more force transmission/conversion devices (such as gears, transmission shafts, lead screws, nuts or sliders). The power plant may be an electromagnetic device that converts or transmits electrical energy according to the laws of electromagnetic induction, such as a Permanent Magnet (PM) motor, a reactive (VR) motor, and a Hybrid (HB) motor.

In some embodiments, as shown in fig. 1, fig. 1 is a schematic diagram of a peristaltic squeezing mechanism of an infusion pump according to an embodiment of the present invention; wherein the infusion pump is the infusion pump 100, the infusion device is the infusion tube 118, the power driving circuit, the power device 114 and the peristaltic squeezing mechanism 102 form a driving mechanism of the infusion pump 100, and in some embodiments, the driving mechanism may further include a speed reducing mechanism. A liquid such as a drug solution is stored in the drug bottle 104, and the peristaltic pressing mechanism 102 includes a cam shaft 108, a pump sheet group 110, and a pressing plate 112. The processor of the infusion pump 100 sends instructions such as rotating speed or position, and drives a power device 114 (e.g., a motor) to operate according to a specified rotating speed and a specified steering direction through a power driving circuit, and the power device 114 drives a cam shaft 108 connected with the power device to rotate in the rotating process; during the rotation of the camshaft 108, the pump plate set 110 on the camshaft 108 performs a linear reciprocating motion, that is, the pump plates on the pump plate set 110 sequentially perform a linear reciprocating motion. The pump plate set 110 cooperates with the pressing plate 112 to sequentially and reciprocally press and release the outer wall of the infusion tube 118, so as to drive the liquid in the infusion tube 118 to continuously flow in a directional manner. A speed reducing mechanism may be further disposed between the power device 114 and the camshaft 108 to ensure that the rotation speed of the pump blade set 110 is stable and uniform. In some embodiments, the infusion tube 118 may also be used with a drip chamber 120.

In some embodiments, as shown in fig. 2, fig. 2 is a schematic view of a drive mechanism of a syringe pump according to an embodiment of the present invention; wherein, the infusion pump is an injection pump, the infusion apparatus is an injector 212, and the power driving circuit, the power device, the speed reducing mechanism, the screw rod 202 and the nut 204 form a driving mechanism of the injection pump. The push-pull box 208 is used to hold the plunger 214 of the syringe 212. A processor in the injection pump sends instructions such as rotating speed or position, a power device (such as a motor 200) is driven by a power driving circuit, the motor 200 drives a screw rod 202 and a nut 204 through a speed reducing mechanism, the rotating motion of the motor 200 is converted into the linear motion of the nut 204, the nut 204 is connected with a push rod 206 of a matched injector 212, the push rod 206 is connected with a push-pull box 208, the push-pull box 208 can push a piston 214 (the injector 212 also comprises a handle 210) of the matched injector 212 to perform injection and transfusion, and the pushing speed of the matched injector 212 can be adjusted by setting the rotating speed of the motor 200, so that the given infusion dose and the infusion speed are adjusted.

In some embodiments, the pressure sensor 710 may respond to the pressure value of the measured object and convert the pressure value into an electrical signal for detection and send to the processor. The pressure sensor 710 may be a resistive strain gauge pressure sensor, a semiconductor strain gauge pressure sensor, a piezoresistive pressure sensor, an inductive pressure sensor, a capacitive pressure sensor, a resonant pressure sensor, a fiber optic pressure sensor, or a capacitive acceleration sensor. In some embodiments, the pressure sensor 710 may be used to detect the internal pressure of an infusion set or the internal pressure of an infusion line.

It should be understood that the infusion devices described above with respect to fig. 1 and 2 are only one example, and that they may have more or fewer components, or a different configuration of components, than those shown in fig. 1 and 2.

An embodiment of the present invention provides a method for determining a state of an infusion pipeline, which is applied to an infusion apparatus described in any one of the embodiments above, and with reference to fig. 3, the method for determining a state of an infusion pipeline includes:

301, acquiring a pressure characteristic value of the infusion pipeline according to a first time interval, wherein the pressure characteristic value represents pressure change in the infusion pipeline;

in particular, the specific value of the first time interval may be set as desired, for example, the first time interval is 1s or 2s, or the first time interval may be a rotation period of the motor. The pressure characteristic value represents a pressure change in the infusion pipeline, and may be any one of a numerical value, a pressure value, and a pressure value of a pressure sensing analog quantity, taking a pressure sensor as an example, the pressure sensing analog quantity is a specific numerical value, such as a current value or a voltage value, of an analog signal generated when the pressure sensor senses the pressure change.

In fact, the infusion pump can acquire the pressure characteristic value of the infusion pipeline in real time and sample the pressure characteristic value according to the first time interval. For example, the first time interval is 1s as an example, the pressure characteristic value is pressure as an example, the pressure sensor acquires pressure in the infusion pipeline in real time, and the processor processes the pressure value according to the cross-sectional area of the infusion pipeline to obtain a corresponding real-time pressure value. The processor samples one pressure value for each 1s interval for subsequent processing.

Step 302, acquiring a pressure characteristic value variation corresponding to a pressure characteristic value in a second time interval according to the second time interval, wherein the second time interval is greater than or equal to the first time interval;

specifically, the second time interval is greater than or equal to the first time interval, and the specific value of the second time interval can be set according to actual needs, for example, set to 5s, 10s or 20 s. When the second time interval is equal to the first time interval, a pressure characteristic value change amount is calculated every time a pressure characteristic value is obtained. And when the second time interval is larger than the first time interval, each second time interval at least comprises one pressure characteristic value, and a pressure characteristic value change is calculated according to the at least one pressure characteristic value.

In some embodiments, the second time interval may be determined in terms of an infusion time or a volume of the infused fluid substance, wherein the volume of the infused fluid substance may be converted into a time, for example, a change in the pressure characteristic value is obtained once per 1ml of fluid substance infused.

In some embodiments, when the infusion pump is a syringe pump, the second time interval may be determined by a movement distance of a piston of a syringe controlled by the syringe pump, and likewise, the movement distance of the piston may be converted into time, for example, a change in the pressure characteristic value is obtained every time a position of 1ml is set. When the infusion pump is an infusion pump, the second time interval may be determined by a running distance of a motor in the infusion pump, and the running distance of the motor may be converted into time, for example, a change amount of the pressure characteristic value is obtained every time the motor runs for 10 mm.

Step 303, when the pressure characteristic value variation at the current moment is greater than or equal to the first pressure characteristic value variation threshold, determining that the state of the infusion pipeline is a blocking state; the first pressure characteristic value variation threshold is obtained by calculating according to the first number of pressure characteristic value variations in advance before the current moment;

in particular, the specific value of the first number may be set according to actual needs, for example, 10 or 20. Before the current time, a first pressure characteristic value variation threshold needs to be calculated in advance according to a first number of pressure characteristic value variations. Generally, after the infusion device is started, a first number of pressure characteristic variation amounts are obtained to calculate a first pressure characteristic variation amount threshold. And then comparing the pressure characteristic value variable quantity with a first pressure characteristic value variable quantity threshold value every time one pressure characteristic value variable quantity is obtained, and determining that the state of the infusion pipeline is a blocking state when the currently obtained pressure characteristic value variable quantity is larger than or equal to the first pressure characteristic value variable quantity threshold value.

Step 304, determining the blocking duration of the blocking state of the infusion pipeline, and determining the amount of the blocked fluid according to the blocking duration and the flow of the fluid substance;

specifically, in some embodiments, the method for determining the state of the infusion pipeline further comprises:

step 307, determining the blocking duration of the blocking state of the infusion pipeline;

specifically, when the state of the infusion pipeline is determined to be the blocking state in step 303, counting the continuous blocking duration of the blocking state is started until the state of the infusion pipeline is determined to be the non-blocking state (i.e., the pressure characteristic value variation is smaller than the first pressure characteristic value variation threshold), stopping counting the time, and waiting for counting the time again when the next determination is made to be the blocking state.

Additionally, the amount of fluid that has not been infused into the patient due to an occlusion can be calculated from the flow rate of the fluid substance multiplied by the occlusion duration.

And 305, outputting at least one of the pressure characteristic value change amount, the blocking duration and the blocking fluid amount in the blocking state.

Specifically, taking the output of the occlusion duration as an example, the occlusion duration may be output on a display screen of the infusion pump, or the occlusion duration may be displayed in real time by using a light assembly of the infusion pump, so that the infusion person knows the occlusion duration of the occlusion state, which is convenient for paying attention to the infusion safety of the patient. The method of outputting the variation of the characteristic value of the pressure and the amount of the blocking fluid is the same as the method of outputting the duration of the blocking, and the description thereof is omitted.

Particularly, the embodiment of the invention can realize the judgment of the injection state in the infusion pipeline by analyzing the pressure change condition of the infusion pipeline. Because the consumable type of the infusion equipment of actual clinical use is abundant, utilize this scheme can adapt to the first pressure eigenvalue variation threshold of different consumables when using by oneself, strengthen blocking the universality and the accuracy of judging.

Notably, the first pressure characteristic change threshold is less than the occlusion alarm threshold of the infusion pump. Wherein, the blocking alarm threshold value of the infusion pump can be set according to actual requirements. Because the first pressure characteristic value variable quantity threshold is smaller than the blocking alarm threshold of the infusion pump, whether blocking occurs or not is judged by comparing each obtained pressure characteristic value variable quantity with the first pressure characteristic value variable quantity threshold, the blocking condition of the infusion pipeline can be found in time, and the sensitivity and the accuracy of blocking judgment are improved.

In some embodiments, the method for determining the state of the infusion line further comprises:

step 306, when the pressure characteristic value variation at the current time is smaller than the first pressure characteristic value variation threshold, saving the pressure characteristic value variation at the current time for updating the first pressure characteristic value variation threshold.

Specifically, when the currently obtained pressure characteristic value variation is smaller than the first pressure characteristic value variation threshold, the pressure characteristic value variation is saved for updating the first pressure characteristic value variation threshold.

According to the embodiment of the invention, the threshold of the variation of the first pressure characteristic value is updated according to the variation of the stored pressure characteristic value, so that the judgment accuracy of the state of the infusion pipeline can be effectively ensured.

In some embodiments, in step 302, obtaining a pressure characteristic value variation corresponding to the pressure characteristic value in the second time interval according to the second time interval includes:

the pressure characteristic change amount is determined from a difference between the pressure characteristic at the end time of the second time interval and the pressure characteristic at the start time of the second time interval.

Specifically, the second time interval is an integer multiple of the first time interval, in other words, the second time interval is at least the first time interval, or more than 2 times the first time interval. Therefore, at least one new pressure characteristic value can be obtained for each second time interval, and when the pressure characteristic value variation is calculated, the pressure characteristic value at the ending time of the second time interval is subtracted from the pressure characteristic value at the starting time of the second time interval according to the newly obtained pressure characteristic value, namely, the pressure characteristic value at the ending time of the second time interval, and the obtained difference is used as the pressure characteristic value variation corresponding to the second time interval.

step 3021, determining a maximum value and a minimum value of the pressure characteristic values in the second time interval;

in particular, at least two pressure characteristics may be obtained during the second time interval, a maximum and a minimum of which are determined from the at least two pressure characteristics.

And step 3022, determining the pressure characteristic value variation according to the difference value between the maximum value and the minimum value.

Specifically, a difference obtained by subtracting the minimum value from the maximum value is determined as the pressure characteristic value variation corresponding to the second time interval.

In some embodiments, saving 306 the pressure characteristic variation amount at the current time for updating the first pressure characteristic variation amount threshold includes:

and when the number of the stored pressure characteristic value variation amounts at the current moment reaches a second number, updating the first pressure characteristic value variation amount threshold according to the second number of pressure characteristic value variation amounts.

Specifically, the specific value of the second number may be set according to actual needs, for example, 5, 10, 15, or 20. When the number of the stored pressure characteristic value variation amounts reaches a second number, updating the first pressure characteristic value variation amount threshold value according to the second number of pressure characteristic value variation amounts; and the stored pressure characteristic value change quantity is emptied and accumulation is restarted.

By updating the first pressure characteristic value variable quantity threshold regularly, the judgment accuracy of the blocking state can be effectively improved.

In some embodiments, the calculating the first pressure characteristic value change amount threshold according to the first number or the second number of pressure characteristic value changes includes:

step S11, calculating the mean value and the standard deviation of the pressure characteristic value according to the first number or the second number of pressure characteristic value variations;

specifically, the first pressure characteristic value variation threshold value is calculated according to the first number or the second number of pressure characteristic value variations, and the calculation methods of the two are the same. In particular, the first pressure characteristic amount of change threshold may also be referred to as a pressure characteristic amount of change upper limit. Taking the first number of pressure characteristic value variations as an example, the mean and standard deviation of the first number of pressure characteristic value variations are calculated first.

And step S21, adding the average value and a multiple of standard deviation to determine a first pressure characteristic value change quantity threshold value, wherein a is a positive number.

Specifically, the first pressure characteristic value variation threshold is determined according to the sum of the mean value and a times of standard deviation, a is a positive number, such as 1, 2, 3, 1.2, 1.5, etc., and the specific value can be set according to actual needs.

step S12, calculating the median and the m quantiles according to the pressure characteristic value change quantity of the first number or the second number, wherein m is a positive integer;

specifically, similarly, taking the first number of pressure characteristic value variations as an example, the median and m quantiles of the first number of pressure characteristic value variations are calculated first, where m is a positive integer, for example, 1, 2, 3, and the specific numerical value may be set according to actual needs.

And step S22, determining a first pressure characteristic value variation threshold according to the median and the m-quantile.

Specifically, a first pressure characteristic change amount threshold is then determined according to the median and the m-quantile.

In some embodiments, step S22 includes:

step A, determining a difference value of an m quantile and a median as a median difference value;

specifically, the difference between the m-quantile and the median is determined first, and this difference is taken as the median difference.

And step B, adding the median and the B-time division difference value to determine a first pressure characteristic value change quantity threshold, wherein B is a positive number.

Specifically, the first pressure characteristic value variation threshold is then determined according to the sum of the median and the b-fold median difference, b is a positive number, such as 1, 2, 3, 1.2, 1.5, etc., and specific values can be set according to actual needs.

and 307, when the pressure characteristic value variation at the current moment is smaller than a second pressure characteristic value variation threshold, determining that the state of the infusion pipeline is an abnormal state, and outputting alarm prompt information, wherein the second pressure characteristic value variation threshold is obtained by calculating according to the first number of pressure characteristic value variations in advance before the current moment.

Specifically, the second pressure characteristic value variation amount threshold may also be referred to as a pressure characteristic value variation amount lower limit. And calculating in advance according to the first number of pressure characteristic value variation quantities before the current moment to obtain a second pressure characteristic value variation quantity threshold value. When the currently obtained pressure characteristic value variation is smaller than the second pressure characteristic value variation threshold, the state of the infusion pipeline can be determined to be an abnormal state, and meanwhile, alarm prompt information is output. At this time, the situation that the pressure characteristic value variation suddenly drops due to the possible leakage of the infusion pipeline (such as the falling off of the infusion extension pipe) and the like needs to output prompt information to remind infusion personnel, so that the infusion safety of a patient is ensured.

The method for outputting the alarm prompt information comprises the steps of controlling a light assembly of the infusion pump to work to perform optical alarm, or controlling a display screen of the infusion pump to output alarm characters, or controlling a loudspeaker of the infusion pump to work to perform acoustic alarm and the like.

and 308, when the number of the stored pressure characteristic value variation at the current moment reaches a second number, updating a second pressure characteristic value variation threshold according to the second number of pressure characteristic value variations.

Specifically, the judgment accuracy of the infusion abnormal state can be effectively improved by updating the second pressure characteristic value variation threshold at regular time.

In addition, the second pressure characteristic value variation threshold value is calculated in a similar manner to the first pressure characteristic value variation threshold value, for example, a mean value and a standard deviation of a second number of pressure characteristic value variations are calculated, and then a difference between the mean value and a multiple of the standard deviation is used as the second pressure characteristic value variation threshold value. Or the median and the m-quantile of the second number of pressure characteristic value variation quantities can be calculated firstly, then the difference value between the m-quantile and the median is used as a median difference value, and finally the median and the median difference value multiplied by b are used as a second pressure characteristic value variation quantity threshold value.

and 309, outputting alarm prompt information when the blocking duration exceeds a time threshold.

Specifically, the specific value of the time threshold may be set according to actual needs, for example, 10s, 20s, or 30 s. And when the blockage duration time is judged to exceed the time threshold value, outputting alarm prompt information to prompt the infusion blockage duration time. The light assembly of the infusion pump can be controlled to work to perform optical alarm, or a display screen of the infusion pump is controlled to output alarm characters, or a loudspeaker of the infusion pump is controlled to work to perform acoustic alarm, and the like. The blocking duration of the blocking state of the infusion pipeline of infusion personnel can be effectively prompted by outputting alarm prompt information, the situation of long-term blocking is avoided, and the situation that people pay no attention to the blocking situation is avoided, so that the infusion safety of a patient is guaranteed.

and step 310, outputting alarm prompt information when the amount of the blocking fluid exceeds the fluid threshold value.

In particular, the specific value of the fluid threshold may be set according to actual needs, for example, 5ml, 10ml or 15ml, etc. When the amount of the blocked fluid is larger than the fluid threshold value, alarm prompt information is output to prompt infusion personnel to pay attention to the blocking condition of the infusion pipeline, and the threat to the life safety of a patient caused by long-term blocking is avoided.

It is specifically noted that the numbering of the steps in this document is intended to distinguish between different steps, and the numbering does not limit the order of execution of the steps.

In order to more clearly understand the method for determining the state of an infusion pipeline according to an embodiment of the present invention, referring to fig. 4 and 5, fig. 4 is a schematic flow chart of the method for determining the state of an infusion pipeline according to an embodiment of the present invention, and fig. 5 is a schematic pressure variation of the method for determining the state of an infusion pipeline according to an embodiment of the present invention; the rotation period of the motor is taken as a first period, the second period is the same as the first period, and the pressure characteristic value is taken as a pressure value for explanation:

firstly, after a motor of an infusion pump is started, a pressure sensor in the infusion pump is used for acquiring a real-time pressure value in an infusion pipeline, and a real-time pressure value P is obtained through calculation. The pressure value is sampled at regular time according to the rotation period of the motor, namely when the time interval exceeds the rotation period of the motor, the pressure value P at the current moment is recorded_nAnd calculating the pressure variation delta in the time interval_n＝P_n-P_n-1And storing the delta_n. When the amount of stored δ exceeds the first number N1, it is determined whether the first pressure variation threshold P has been calculated_upWhen P is not calculated_upThen, the N1 presses are eliminatedAfter the outliers in the strong variations, their mean value P is calculated from the remaining pressure variations_avgAnd standard deviation P_stdAccording to the mean value P_avgAnd standard deviation P_stdCalculating a first pressure variation threshold P_upAnd a second pressure variation threshold P_down。

Then, the pressure variation delta of the next cycle is obtained_n+1When P has been calculated_upThen, the delta is determined_n+1And P_upWhen the magnitude of (d) is in the range of_n+1Greater than or equal to P_upThen, the state of the infusion pipeline at the moment is judged to be a blocking state, the blocking duration is accumulated, and the pressure variation delta of the next period is continuously obtained_n+2. And when the blocking duration exceeds a time threshold, outputting alarm prompt information to prompt the blocking state. When delta is_n+1Less than P_upWhen storing the delta_n+1And accumulates the number of stored deltas. When the accumulated amount exceeds the second number N2, a new P is calculated using N2 deltas_upAnd P_downAnd update P_upAnd P_downContinuously acquiring the pressure variation delta of the next period_n+2. In addition, delta may be obtained_n+1And P_downMaking a comparison when delta_n+1Less than P_downAnd outputting alarm prompt information to prompt the abnormal infusion state.

Referring to fig. 5, wherein the first pressure variation threshold value P is calculated by timing_upAnd a second pressure variation threshold P_downAnd the infusion state is judged by utilizing the pressure intensity and the real-time pressure intensity variable quantity, so that the judgment speed of the state of the infusion pipeline can be improved, and the safety of infusion patients is effectively guaranteed.

Based on the method for determining the state of the infusion pipeline, an embodiment of the present invention further provides a device for determining the state of the infusion pipeline, which is applied to the infusion apparatus in any one of the embodiments described above, with reference to fig. 6, fig. 6 is a schematic structural diagram of the device for determining the state of the infusion pipeline provided in the embodiment of the present invention, where the device for determining the state of the infusion pipeline includes:

the first obtaining module 601 is configured to obtain a pressure characteristic value of the infusion pipeline according to a first time interval, where the pressure characteristic value represents a pressure change in the infusion pipeline;

a second obtaining module 602, configured to obtain, according to a second time interval, a pressure characteristic value variation corresponding to a pressure characteristic value in the second time interval, where the second time interval is greater than or equal to the first time interval;

the first processing module 603 is configured to determine that the state of the infusion pipeline is a blocked state when the pressure characteristic value variation at the current time is greater than or equal to a first pressure characteristic value variation threshold; the first pressure characteristic value variation threshold is obtained by calculating according to the first number of pressure characteristic value variations in advance before the current moment;

a determining module 604, configured to determine a blocking duration of a blocking state of the infusion pipeline, and determine a blocking fluid amount according to the blocking duration and a flow rate of the fluid substance;

an output module 605 configured to output at least one of the variation of the pressure characteristic value, the occlusion duration, and the amount of the occluded fluid in the occlusion state.

In some embodiments, the device for determining the state of the infusion line further comprises:

the second processing module 606 is configured to, when the pressure characteristic value variation at the current time is smaller than the first pressure characteristic value variation threshold, store the pressure characteristic value variation at the current time for updating the first pressure characteristic value variation threshold.

the third processing module 607 is configured to determine that the state of the infusion pipeline is an abnormal state when the pressure characteristic value variation at the current time is smaller than the second pressure characteristic value variation threshold, and output an alarm prompt message, where the second pressure characteristic value variation threshold is obtained by calculating in advance according to the first number of pressure characteristic value variations before the current time.

the fourth processing module 608 is configured to, when the number of the stored pressure characteristic value changes at the current time reaches the second number, update the second pressure characteristic value change threshold according to the second number of pressure characteristic value changes.

In some embodiments, the output module is further configured to output an alarm prompt when the occlusion duration exceeds a time threshold.

the blocking duration output module is also used for outputting alarm prompt information when the blocking fluid quantity exceeds the fluid threshold value.

In some embodiments, the calculation of the pressure characteristic value variation, the calculation of the first pressure characteristic value variation threshold, and the calculation of the second pressure characteristic value variation threshold may refer to the description of the method for determining the state of the infusion pipeline, and are not described again.

It should be noted that, for the specific functional implementation of the device for determining the state of the infusion pipeline, reference may be made to the above description of the method for determining the state of the infusion pipeline, and details are not described here again. Each unit or module in the device for determining the state of the infusion pipeline can be respectively or completely combined into one or a plurality of other units or modules to form the device, or some unit(s) or module(s) can be further split into a plurality of functionally smaller units or modules to form the device, so that the same operation can be realized without affecting the realization of the technical effect of the embodiment of the invention. The above units or modules are divided based on logic functions, and in practical applications, the functions of one unit (or module) may also be implemented by a plurality of units (or modules), or the functions of a plurality of units (or modules) may be implemented by one unit (or module).

Based on the method for determining the state of the infusion pipeline, an embodiment of the present invention further provides an infusion pump, where the infusion pump may be the infusion pump described in any of the embodiments above, and with reference to fig. 7, the infusion pump is used in cooperation with the infusion pipeline, and the infusion pump includes: processor 720, memory 730, drive mechanism 740 (drive mechanism 740 includes, for example, power drive circuitry, power devices), pressure sensor 710, and display 750, which communicate via one or more communication buses or signal lines. The infusion pump of the embodiment of the present application can be used to execute the foregoing method for determining the status of an infusion line, and the details of the relevant steps of the determination method can be referred to the corresponding description, which is not described herein one by one.

Pressure sensor 710 is configured to detect a pressure characteristic related to pressure inside the infusion fluid line; the pressure characteristic value represents a pressure change in the infusion pipeline, and may be any one of a numerical value, a pressure value, and a pressure value of a pressure sensing analog quantity, taking a pressure sensor as an example, the pressure sensing analog quantity is a specific numerical value, such as a current value or a voltage value, of an analog signal generated when the pressure sensor senses the pressure change.

In practice, the processor 720 of the infusion pump may obtain the pressure characteristic value of the infusion line in real time and sample the pressure characteristic value at a first time interval. For example, the pressure characteristic value is pressure, the pressure sensor obtains the pressure in the infusion pipeline in real time, and the processor 720 processes the pressure value according to the cross-sectional area of the infusion pipeline to obtain a corresponding real-time pressure value.

In one example, drive mechanism 740 may include a powered drive circuit and a power device, with drive mechanism 740 configured to apply pressure to an infusion line (e.g., an infusion set or tubing) to directionally move a fluid substance within the infusion line to infuse the fluid substance into a patient.

The processor 720 drives the power device through the power driving circuit, so that the power device can controllably move under the driving of the processor 720, and in the moving process, the control object (such as a peristaltic squeezing mechanism or a push-pull box) is driven to move through one or more force transmission/conversion devices (such as gears, transmission shafts, lead screws, nuts or sliders). The power plant may be an electromagnetic device that converts or transmits electrical energy according to the laws of electromagnetic induction, such as a Permanent Magnet (PM) motor, a reactive (VR) motor, and a Hybrid (HB) motor.

In one embodiment, as shown in fig. 7, the infusion pump of the present application further comprises a memory 730 for storing executable program instructions; memory 730 may include high-speed random access memory and may also include non-volatile memory, such as one or more magnetic disk storage devices, flash memory devices, or other non-volatile solid-state storage devices. The memory 730 may also be used to store various data information during operation of the infusion pump, etc.

In one embodiment, as shown in FIG. 7, processor 720 is configured to execute program instructions stored in memory 730 to cause processor 720 to perform the steps of: acquiring a pressure characteristic value of the infusion pipeline according to a first time interval, wherein the pressure characteristic value represents pressure change in the infusion pipeline; acquiring pressure characteristic value variation corresponding to the pressure characteristic value in a second time interval according to the second time interval, wherein the second time interval is greater than or equal to the first time interval, and optionally, the second time interval is determined according to the infusion time or the volume of the infusion fluid substance; when the pressure characteristic value variation at the current moment is larger than or equal to the first pressure characteristic value variation threshold, determining that the state of the infusion pipeline is a blocking state; the first pressure characteristic value variation threshold is obtained by calculating according to the first number of pressure characteristic value variations in advance before the current moment; determining the blocking duration of the blocking state of the infusion pipeline, and determining the amount of the blocking fluid according to the blocking duration and the flow of the fluid substance; outputting at least one of a real-time pressure characteristic value, a pressure characteristic value variation when in the occlusion state, an occlusion duration, and an occlusion fluid amount.

Notably, the first pressure characteristic change threshold is less than the occlusion alarm threshold of the infusion pump. Wherein, the blocking alarm threshold value of the infusion pump can be set according to actual requirements. Because the first pressure characteristic value variable quantity threshold is smaller than the blocking alarm threshold of the infusion pump, whether blocking occurs or not is judged by comparing each obtained pressure characteristic value variable quantity with the first pressure characteristic value variable quantity threshold, the blocking condition of the infusion pipeline can be found in time, and the sensitivity and the accuracy of blocking judgment are improved. In one example, processor 720 is operative to execute program instructions stored in memory, causing processor 720 to perform the steps of: when the pressure characteristic value variation at the current moment is smaller than the first pressure characteristic value variation threshold, the control memory stores the pressure characteristic value variation at the current moment for updating the first pressure characteristic value variation threshold. For example, when the number of stored pressure characteristic value change amounts at the current time reaches the second number, the first pressure characteristic value change amount threshold is updated according to the second number of pressure characteristic value change amounts.

In one example, processor 720 calculates a first pressure characteristic value change amount threshold from a first number or a second number of pressure characteristic value changes, including: calculating the mean value and the standard deviation of the pressure characteristic value according to the first number or the second number of pressure characteristic value changes; and adding the average value and a times of standard deviation to determine a first pressure characteristic value change amount threshold value, wherein a is a positive number.

In another example, processor 720 calculates a first pressure characteristic value change amount threshold from a first number or a second number of pressure characteristic value changes, including: calculating the median and m quantiles according to the change quantity of the pressure characteristic values of the first number or the second number, wherein m is a positive integer; determining a first pressure characteristic value variation threshold according to the median and the m-quantile, for example, determining a difference value between the m-quantile and the median as a median difference value; and then adding the median and the b-time division difference value to determine a first pressure characteristic value change quantity threshold, wherein b is a positive number.

In one example, the processor 720 obtains the pressure characteristic value variation corresponding to the pressure characteristic value in the second time interval according to the second time interval, including: the pressure characteristic change amount is determined from a difference between the pressure characteristic at the end time of the second time interval and the pressure characteristic at the start time of the second time interval.

In another example, the processor 720 obtains the pressure characteristic value variation corresponding to the pressure characteristic value in the second time interval according to the second time interval, including: determining maxima and minima in the pressure characteristic over the second time interval; and determining the pressure characteristic value variation according to the difference value of the maximum value and the minimum value.

In one example, processor 720 is further configured to: and when the pressure characteristic value variation at the current moment is smaller than a second pressure characteristic value variation threshold, determining that the state of the infusion pipeline is an abnormal state, and outputting alarm prompt information, wherein the second pressure characteristic value variation threshold is obtained by calculating according to the first number of pressure characteristic value variations in advance before the current moment. The method for the processor 720 to output the alarm prompt information includes controlling a light assembly of the infusion pump to operate to perform an optical alarm, or controlling a display of the infusion pump, such as a display screen, to output alarm words, or controlling a speaker of the infusion pump to operate to perform an acoustic alarm, etc.

In one example, processor 720 is further configured to: and when the number of the stored pressure characteristic value variation amounts at the current moment reaches a second number, updating the second pressure characteristic value variation amount threshold according to the second number of the pressure characteristic value variation amounts.

In one example, the infusion pump of the present application further includes a display 750, the display 750 may include a display screen, and the display 750 is configured to display at least one of a real-time pressure characteristic value, a pressure characteristic value variation when in an occlusion state, an occlusion duration, and an occlusion fluid amount, so as to facilitate medical staff to know the status of the infusion line in time and improve the work efficiency of the medical staff.

In one example, processor 720 is further configured to: when the blocking duration exceeds a time threshold, outputting alarm prompt information; the display 750 is used for displaying alarm prompt information; and/or the infusion pump further comprises a light assembly configured to optically alarm in response to the alarm cue information, and/or the infusion pump further comprises a speaker configured to acoustically alarm in response to the alarm cue information.

In one example, processor 720 is further configured to: when the amount of the blocking fluid exceeds the fluid threshold value, outputting alarm prompt information; the display 750 is used for displaying alarm prompt information; and/or the infusion pump further comprises a light assembly configured to optically alarm in response to the alarm cue information, and/or the infusion pump further comprises a speaker configured to acoustically alarm in response to the alarm cue information.

In addition, the present application also provides an infusion device comprising an infusion pump as described herein and an infusion line, wherein the infusion line may comprise an infusion set and/or an infusion tube, wherein the description of the infusion pump may refer to the foregoing and will not be repeated here.

Further, here, it is to be noted that: an embodiment of the present invention further provides a computer storage medium, where a computer program executed by the aforementioned determining apparatus for determining a state of an infusion pipeline is stored in the computer storage medium, and the computer program includes program instructions, and when the processor executes the program instructions, the description of the method for determining a state of an infusion pipeline can be executed, which will not be described herein again. In addition, the beneficial effects of the same method are not described in detail. For technical details not disclosed in the embodiments of the computer storage medium to which the present invention relates, reference is made to the description of the method embodiments of the present invention.

It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware related to instructions of a computer program, which can be stored in a computer-readable storage medium, and when executed, the processes of the embodiments of the methods described above can be included. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the invention is not limited by the scope of the appended claims.

Claims

1. The method for judging the state of the infusion pipeline is characterized by being applied to an infusion device, wherein the infusion device comprises an infusion pump, an infusion set and the infusion pipeline, the infusion pump is configured to apply pressure to the infusion set so as to enable fluid substances in the infusion set to move directionally in the infusion pipeline;

the method comprises the following steps:

outputting at least one of a real-time pressure characteristic value, a pressure characteristic value variation when in an occlusion state, the occlusion duration, and the occlusion fluid amount.

2. The method of claim 1, further comprising:

and when the pressure characteristic value variation at the current moment is smaller than the first pressure characteristic value variation threshold, storing the pressure characteristic value variation at the current moment for updating the first pressure characteristic value variation threshold.

3. The method according to claim 2, wherein the saving the pressure characteristic value change amount at the current time for updating the first pressure characteristic value change amount threshold includes:

4. The method of claim 3, wherein calculating the first pressure characteristic value change amount threshold from the first or second number of pressure characteristic value changes comprises:

calculating the mean value and the standard deviation of the pressure characteristic value according to the first number or the second number of pressure characteristic value changes;

and adding the average value and a times of the standard deviation to determine the first pressure characteristic value change quantity threshold, wherein a is a positive number.

5. The method of claim 3, wherein calculating the first pressure characteristic value change amount threshold from the first or second number of pressure characteristic value changes comprises:

calculating the median and m quantiles according to the change quantity of the pressure characteristic values of the first number or the second number, wherein m is a positive integer;

and determining the first pressure characteristic value variation threshold according to the median and the m-quantile.

6. The method of claim 5, wherein determining the first pressure characteristic value change amount threshold from the median and the m-quantile comprises:

determining a difference value of the m quantile and the median as a median difference value;

and adding the median and the b times of the median difference value to determine the first pressure characteristic value change quantity threshold, wherein b is a positive number.

7. The method according to any one of claims 1 to 6, further comprising:

and when the blocking duration exceeds a time threshold, outputting alarm prompt information.

8. The method according to any one of claims 1 to 6, further comprising:

and when the amount of the blocking fluid exceeds the fluid threshold value, outputting alarm prompt information.

9. The method according to any one of claims 1 to 6, wherein the pressure characteristic value is any one of a numerical value of a pressure sensing analog quantity, a pressure value and a pressure value.

10. The method according to any one of claims 1 to 6, wherein the obtaining the pressure characteristic value variation corresponding to the pressure characteristic value in the second time interval according to the second time interval comprises:

determining the pressure characteristic value variation amount according to a difference between the pressure characteristic value at the end time of the second time interval and the pressure characteristic value at the start time of the second time interval.

11. The method according to any one of claims 1 to 6, wherein the obtaining the pressure characteristic value variation corresponding to the pressure characteristic value in the second time interval according to the second time interval comprises:

determining maxima and minima in the pressure signature over the second time interval;

and determining the pressure characteristic value variation according to the difference value of the maximum value and the minimum value.

12. The method according to any one of claims 1 to 6, further comprising:

and when the pressure characteristic value variation at the current moment is smaller than a second pressure characteristic value variation threshold, determining that the state of the infusion pipeline is an abnormal state, and outputting alarm prompt information, wherein the second pressure characteristic value variation threshold is obtained by calculating according to the first number of pressure characteristic value variations in advance before the current moment.

13. The method of claim 12, further comprising:

and when the number of the stored pressure characteristic value variation amounts at the current moment reaches the second number, updating the second pressure characteristic value variation amount threshold according to the second number of pressure characteristic value variation amounts.

14. The method according to any one of claims 1 to 6, wherein the second time interval is determined according to the infusion time or the volume of the fluid substance to be infused.

15. The method of any of claims 1-6, wherein the first pressure characteristic change threshold is less than an occlusion alarm threshold of the infusion pump.

16. The utility model provides an infusion pump, its characterized in that, infusion pump and infusion pipeline form a complete set and use, infusion pipeline includes transfusion system and/or transfer line, infusion pump includes:

a memory for storing executable program instructions;

17. The infusion pump of claim 16, wherein the processor is configured to execute the program instructions stored in the memory to cause the processor to perform the steps of:

and when the pressure characteristic value variation at the current moment is smaller than the first pressure characteristic value variation threshold, controlling the memory to store the pressure characteristic value variation at the current moment for updating the first pressure characteristic value variation threshold.

18. The infusion pump of claim 16, wherein the processor controls the memory to store the change in the pressure characteristic value at the current time for updating the first threshold value of the change in the pressure characteristic value, comprising:

19. The infusion pump of claim 18, wherein the processor calculates a first pressure characteristic value change amount threshold from a first number or a second number of pressure characteristic value changes, comprising:

calculating the mean value and the standard deviation of the pressure characteristic value variation quantities of the first number or the second number;

20. The infusion pump of claim 18, wherein the processor calculates a first pressure characteristic value change amount threshold from a first number or a second number of pressure characteristic value changes, comprising:

21. The infusion pump of claim 20, wherein the processor determines the first pressure characteristic value change amount threshold as a function of the median and the m-quantile, comprising:

22. The infusion pump of any of claims 16 to 21, wherein the processor is further configured to:

when the blocking duration exceeds a time threshold, outputting alarm prompt information;

the display is used for displaying the alarm prompt information; and/or

The infusion pump further includes a light assembly configured to optically alarm in response to the alarm cue information, and/or the infusion pump further includes a speaker configured to acoustically alarm in response to the alarm cue information.

23. The infusion pump of any of claims 16 to 21, wherein the processor is further configured to: when the amount of the blocking fluid exceeds the fluid threshold value, outputting alarm prompt information;

the display is used for displaying the alarm prompt information; and/or

24. The infusion pump of any of claims 16 to 21, wherein the characteristic pressure value is any of a pressure sensing analog value, a pressure value, and a pressure value.

25. The infusion pump of any of claims 16 to 21, wherein the processor obtains a change in the pressure characteristic corresponding to the pressure characteristic over a second time interval, comprising:

26. The infusion pump of any of claims 16 to 21, wherein the processor obtains a change in the pressure characteristic corresponding to the pressure characteristic over a second time interval, comprising:

27. The infusion pump of any of claims 16 to 21, wherein the processor is further configured to:

28. The infusion pump of claim 27, wherein the processor is further configured to:

29. The infusion pump of any of claims 16 to 21, wherein the second time interval is determined according to an infusion time or a volume of the fluid substance to be infused.

30. The infusion pump of any of claims 16 to 21, wherein the first pressure characteristic change threshold is less than an occlusion alarm threshold of the infusion pump.

31. An infusion device, comprising:

the infusion pipeline comprises an infusion device and/or an infusion tube;

a memory for storing executable program instructions;