CN116115862A - Citric acid injection system for continuous kidney substitution treatment - Google Patents

Citric acid injection system for continuous kidney substitution treatment Download PDF

Info

Publication number
CN116115862A
CN116115862A CN202310077576.7A CN202310077576A CN116115862A CN 116115862 A CN116115862 A CN 116115862A CN 202310077576 A CN202310077576 A CN 202310077576A CN 116115862 A CN116115862 A CN 116115862A
Authority
CN
China
Prior art keywords
citric acid
infusion pump
module
infrared
receiving
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310077576.7A
Other languages
Chinese (zh)
Inventor
燕金元
徐小波
唐文普
梁瑾
郑加新
任高波
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangdong Biolight Meditech Co Ltd
Original Assignee
Guangdong Biolight Meditech Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Guangdong Biolight Meditech Co Ltd filed Critical Guangdong Biolight Meditech Co Ltd
Priority to CN202310077576.7A priority Critical patent/CN116115862A/en
Publication of CN116115862A publication Critical patent/CN116115862A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • 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
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/168—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body
    • A61M5/16804—Flow controllers
    • 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
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/142—Pressure infusion, e.g. using pumps
    • 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
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/168—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body
    • A61M5/16831—Monitoring, detecting, signalling or eliminating infusion flow anomalies
    • 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
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/168—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body
    • A61M5/16877—Adjusting flow; Devices for setting a 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
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/168—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body
    • A61M5/16886—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body for measuring fluid flow rate, i.e. flowmeters
    • 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
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/168—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body
    • A61M5/172—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body electrical or electronic
    • 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

Landscapes

  • Health & Medical Sciences (AREA)
  • Vascular Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

The invention provides a citric acid injection system for continuous kidney replacement therapy, comprising: the pipeline system comprises an infusion pump, a drip kettle and a liquid pipe, wherein the drip kettle is connected with a pump pipe of the infusion pump, the drip kettle is used for dripping citric acid, and the infusion pump is used for inputting the citric acid into the liquid pipe in the peristaltic pump pipe; the control chip is in communication connection with the infusion pump and is used for controlling the rotating speed of the infusion pump; the dropping speed detection device is used for detecting the dropping speed of the citric acid of the dropping kettle and generating dropping speed information; and the protection chip sends an adjusting signal to the control chip when the input flow rate and the output flow rate of the citric acid in the pipeline system are not matched, so that the control chip controls the infusion pump to stop running. According to the technical scheme of the embodiment, the abnormal flow of the infusion pump can be found in time by comparing the dropping speed of the dropping kettle with the rotating speed of the infusion pump, the input of citric acid is stopped, the reliability and the control precision of the system are improved, and the use safety of the citric acid is improved.

Description

Citric acid injection system for continuous kidney substitution treatment
Technical Field
The invention belongs to the field of medical instruments, and particularly relates to a citric acid injection system for continuous kidney substitution treatment.
Background
In the continuous kidney substitution analysis treatment, insufficient injection amount of citric acid for in vitro blood anticoagulation can lead to insufficient anticoagulation, blood vessel access and filter are easy to be blocked, the treatment effect is reduced, and even blood is lost; meanwhile, excessive injection of citric acid is easy to cause bleeding caused by failure of hemostasis and even affect treatment safety, so that the injection amount of citric acid needs to be monitored with high precision in the citric acid process.
In the related art, a liquid level detection device is usually arranged on a dropping kettle of citric acid, and the injection flow rate of the citric acid is judged through the change of the liquid level, but the citric acid is injected after the citric acid also needs to creep to a liquid pipe through an infusion pump, when the infusion pump is abnormal, the liquid level cannot be generated immediately, and the reliability and the control precision of a citric acid injection system are low.
Disclosure of Invention
The embodiment of the invention provides a citric acid injection system for continuous kidney substitution treatment, which can improve the reliability and control precision of the citric acid injection system and improve the use safety of citric acid.
In a first aspect, embodiments of the present invention provide a citric acid injection system for continuous kidney replacement therapy, comprising:
the pipeline system comprises an infusion pump, a drip cup and a liquid pipe, wherein the drip cup is connected with a pump pipe of the infusion pump, the drip cup is used for dripping citric acid, and the infusion pump is used for peristaltic the citric acid in the pump pipe to be input into the liquid pipe;
the control chip is in communication connection with the infusion pump and is used for controlling the rotating speed of the infusion pump;
the dropping speed detection device is used for detecting the dropping speed of the citric acid of the dropping kettle and generating dropping speed information;
the protection chip is in communication connection with the dripping speed detection device and the control chip, and when the input flow rate and the output flow rate of the citric acid in the pipeline system are not matched, the protection chip sends an adjusting signal to the control chip so that the control chip controls the infusion pump to stop running, wherein the input flow rate is determined according to the dripping speed information, and the output flow rate is determined according to the rotating speed of the infusion pump.
According to some embodiments of the invention, the drip speed detection device comprises:
the signal source module comprises a first infrared emission tube and a first infrared receiving tube, the first infrared emission tube and the first infrared receiving tube are respectively positioned at two opposite sides of the drip cup, the emergent direction of the first infrared emission tube and the incident direction of the first infrared receiving tube are parallel to the liquid level of citric acid of the drip cup, and the first infrared receiving tube is used for receiving infrared light emitted by the first infrared emission tube and generating a first receiving signal;
the signal processing module comprises a dripping speed detection receiving module and a square wave output module, the dripping speed detection receiving module comprises a first voltage comparator, the first voltage comparator is connected with the first infrared receiving tube, the first voltage comparator outputs a voltage comparison signal according to the amplitude of the first receiving signal and the first reference voltage value, the square wave output module is used for outputting dripping speed information to the protection chip, and the dripping speed information is a counting square wave signal generated by the square wave output module according to the voltage comparison signal.
According to some embodiments of the invention, the signal source module includes a plurality of the first infrared emitting tubes and a plurality of the first infrared receiving tubes, the plurality of the first infrared emitting tubes are distributed from top to bottom, the plurality of the first infrared receiving tubes are distributed from top to bottom, the number of the first infrared emitting tubes and the number of the first infrared receiving tubes are the same and are aligned to two sides of the drip cup, and the first infrared emitting tubes and the first infrared receiving tubes which are located at the lowest measurement are higher than the outlet of the drip cup.
According to some embodiments of the invention, the drip speed detecting and receiving module includes a plurality of the first voltage comparators, the first voltage comparators are the same as and uniquely correspond to the first infrared receiving tubes, and the drip speed detecting and receiving module further includes:
the input end of the logic AND module positioned at the first stage is connected with the output ends of the first voltage comparators respectively connected with the two first infrared receiving tubes positioned at the uppermost stage, the input end of the logic AND module positioned at the next stage is connected with the output end of the logic AND module positioned at the previous stage and the output end of one first voltage comparator, the output end of the logic AND module positioned at the last stage is connected with the square wave output module, and the square wave output module generates the counting square wave signal according to the logic signals output by the logic AND module positioned at the last stage.
According to some embodiments of the invention, the input terminal of each of the first voltage comparators is further connected to a first switching circuit, and the first switching circuit includes a first triode, and the first triode is turned on when the first receiving signal is acquired.
According to some embodiments of the invention, the citric acid injection system for continuous kidney replacement therapy further comprises:
the liquid level detection device is arranged on the outer side of the drip cup, is in communication connection with the protection chip, and comprises a second infrared emission tube and a liquid level detection receiving module, the emergent direction of the second infrared emission tube is parallel to the liquid level of citric acid of the drip cup, and the liquid level detection receiving module is used for receiving infrared light emitted by the second infrared emission tube, generating liquid level information and sending the liquid level information to the protection chip;
and when the protection chip determines that the current liquid level is higher than the preset upper limit or lower than the preset lower limit according to the liquid level information, the protection chip generates liquid level alarm information.
According to some embodiments of the invention, the liquid level detection receiving module comprises:
the second infrared receiving tube is aligned with the second infrared transmitting tube, and the incidence directions of the second infrared receiving tube are parallel to the liquid level of the citric acid of the drip cup;
the second switching circuit is connected with the second infrared receiving tube and comprises a second triode, and the second triode is conducted after acquiring a second receiving signal generated by the second infrared receiving tube;
the second voltage comparator is connected with the second switch circuit and is used for outputting a level signal according to a second reference voltage value and the second receiving signal, and the second reference voltage value is adjustable.
According to some embodiments of the invention, further comprising:
the first alarm module is connected with the control chip and is used for prompting alarm information generated by the control chip;
the second alarm module is connected with the protection chip and is used for prompting alarm information generated by the protection chip.
According to some embodiments of the invention, the infusion pump comprises:
the stepping motor is in communication connection with the control chip, and the stepping motor determines operation parameters according to control instructions sent by the control chip;
the motor rotating speed detection device is used for detecting the rotating speed of the stepping motor;
the rotor is abutted with the inner side of the pump pipe and driven by the stepping motor to rotate, and the rotor is used for peristaltic citric acid of the pump pipe to be injected into the liquid pipe;
and the rotor rotating speed detection device is used for detecting the rotating speed of the rotor and sending the rotating speed to the protection chip so that the protection chip can determine the output flow speed according to the rotating speed of the rotor.
According to some embodiments of the invention, the piping system further comprises:
the tubing detection module is in communication connection with the control chip, and is used for detecting the installation state of the infusion pump, sending installation alarm information to the control module before the completion of the installation of the infusion pump is detected, and stopping sending the control instruction to the infusion pump by the control chip in the state of acquiring the installation alarm information.
The embodiment of the invention comprises the following steps: the pipeline system comprises an infusion pump, a drip cup and a liquid pipe, wherein the drip cup is connected with a pump pipe of the infusion pump, the drip cup is used for dripping citric acid, and the infusion pump is used for peristaltic the citric acid in the pump pipe to be input into the liquid pipe; the control chip is in communication connection with the infusion pump and is used for controlling the rotating speed of the infusion pump; the dropping speed detection device is used for detecting the dropping speed of the citric acid of the dropping kettle and generating dropping speed information; the protection chip is in communication connection with the dripping speed detection device and the control chip, and when the input flow rate and the output flow rate of the citric acid in the pipeline system are not matched, the protection chip sends an adjusting signal to the control chip so that the control chip controls the infusion pump to stop running, wherein the input flow rate is determined according to the dripping speed information, and the output flow rate is determined according to the rotating speed of the infusion pump. According to the technical scheme of the embodiment, the abnormal flow of the infusion pump can be found in time by comparing the dropping speed of the dropping kettle with the rotating speed of the infusion pump, and the input of the citric acid is stopped, so that the reliability and the control precision of the citric acid injection system are effectively improved, and the use safety of the citric acid is improved.
Drawings
Fig. 1 is a schematic diagram of a citric acid injection system for continuous kidney replacement therapy according to an embodiment of the present invention;
fig. 2 is a schematic diagram of functional modules of a citric acid injection system for continuous kidney replacement therapy according to an embodiment of the present invention;
FIG. 3 is a schematic circuit diagram of a signal source module according to an embodiment of the present invention;
FIG. 4 is a schematic circuit diagram of a signal processing module according to an embodiment of the present invention;
FIG. 5 is a schematic circuit diagram of a drip speed detection receiving module according to an embodiment of the present invention;
fig. 6 is a schematic circuit diagram of a liquid level detection receiving module according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
It should be noted that although functional block division is performed in a device diagram and a logic sequence is shown in a flowchart, in some cases, the steps shown or described may be performed in a different order than the block division in the device, or in the flowchart. The terms first, second, third and the like in the description, in the claims and in the above-described figures, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order.
The invention provides a citric acid injection system for continuous kidney replacement therapy, comprising: the pipeline system comprises an infusion pump, a drip cup and a liquid pipe, wherein the drip cup is connected with a pump pipe of the infusion pump, the drip cup is used for dripping citric acid, and the infusion pump is used for peristaltic the citric acid in the pump pipe to be input into the liquid pipe; the control chip is in communication connection with the infusion pump and is used for controlling the rotating speed of the infusion pump; the dropping speed detection device is used for detecting the dropping speed of the citric acid of the dropping kettle and generating dropping speed information; the protection chip is in communication connection with the dripping speed detection device and the control chip, and when the input flow rate and the output flow rate of the citric acid in the pipeline system are not matched, the protection chip sends an adjusting signal to the control chip so that the control chip controls the infusion pump to stop running, wherein the input flow rate is determined according to the dripping speed information, and the output flow rate is determined according to the rotating speed of the infusion pump. According to the technical scheme of the embodiment, the abnormal flow of the infusion pump can be found in time by comparing the dropping speed of the dropping kettle with the rotating speed of the infusion pump, and the input of citric acid is stopped, so that the input safety and the continuity of the citric acid are effectively improved.
Referring to fig. 1, fig. 1 is a schematic diagram of a citric acid injection system for continuous kidney replacement therapy according to an embodiment of the present invention, the citric acid injection system for continuous kidney replacement therapy includes:
the system comprises a pipeline system, wherein the pipeline system comprises an infusion pump 20, a drip cup 10 and a liquid pipe 30, the drip cup 10 is connected with a pump pipe 21 of the infusion pump 20, the drip cup 10 is used for dripping citric acid, and the infusion pump 20 is used for inputting the citric acid into the liquid pipe 30 in the peristaltic pump pipe 21;
the control chip is in communication connection with the infusion pump 20 and is used for controlling the rotating speed of the infusion pump 20;
the dropping speed detection device is used for detecting the dropping speed of the citric acid of the dropping kettle 10 and generating dropping speed information;
and the protection chip is in communication connection with the dripping speed detection device and the control chip, and when the input flow rate and the output flow rate of the citric acid in the pipeline system are not matched, the protection chip sends an adjusting signal to the control chip so as to enable the control chip to control the infusion pump 20 to stop running, wherein the input flow rate is determined according to the dripping speed information, and the output flow rate is determined according to the rotating speed of the infusion pump 20.
It should be noted that, the drip cup 10 may be connected to a liquid medicine bag or an infusion device containing citric acid through a pipeline, so that citric acid may be dropped into the drip cup 10, and by setting the drip cup 10, air may be isolated, so as to avoid air injection during infusion, and ensure safety of infusion.
It should be noted that, in order to install the control chip, the drip speed detecting device and the protection chip, circuit boards may be disposed on two sides of the drip chamber 10, as shown in fig. 1, a detecting circuit board 40 is disposed on one side of the drip chamber 10, a receiving circuit board 50 is disposed on the opposite side, a transmitting tube of the drip speed detecting device is installed in the detecting circuit board 40, receiving tubes and devices related to signal processing are installed on the receiving circuit board 50, and the control chip and the protection chip may be installed on any circuit board according to actual requirements, so that electrical connection and communication connection may be achieved; of course, the above-mentioned device may be integrated into one detection device, and the detection device may be mounted on the outside of the drip cup 10, and the mounting position of the component is not limited too much in this embodiment, so that the corresponding detection function may be realized.
It should be noted that, as shown in fig. 2, information interaction between the control chip and the protection chip can be realized through serial communication, so that signal transmission efficiency is effectively improved, and response speed of the system is improved.
It should be noted that, since the parameters of the drip cup 10 are known in advance, the unit volume of each drop of citric acid in the drip cup 10 is known, and the drop rate detecting device can detect the drop number of the citric acid dropped in the drip cup 10 in unit time to determine the drop rate, so that the protection chip can calculate the volume of the dropped citric acid according to the drop rate information and the unit volume after acquiring the drop rate information, and then determine the input flow rate in unit time according to the volume. Similarly, the specifications of the liquid pipe 30 and the pump pipe 21 are also known in advance, that is, the amount of citric acid capable of creeping per rotation of the infusion pump 20 after the citric acid is injected into the pipe system can be predetermined, based on which the protection chip can determine the volume of the citric acid output per unit time according to the current rotation speed of the infusion pump 20, thereby determining the output flow rate.
It should be noted that, the mismatch between the input flow rate and the output flow rate may be unequal in value, or may be that the difference between the values of the input flow rate and the output flow rate is greater than a preset error value, and the matching condition is set according to the actual requirement. When the protection chip determines that the input flow rate and the output flow rate are not matched, alarm information can be produced and the operation of the infusion pump 20 is stopped, so that the influence of the system error operation on the infusion safety is avoided.
It should be noted that, because the continuous injection parameters of the citric acid are known and set in advance, under the condition that the input flow rate and the output flow rate are not matched, the system can be self-checked to determine the cause of the abnormality and perform self-adaptive adjustment, for example, when the protection chip determines that the input flow rate is the same as the preset value, the dropping speed of the dropping kettle 10 can be determined to be normal, the unmatched cause is that the rotating speed of the infusion pump 20 is too fast or too slow, the rotating speed of the infusion pump 20 can be adjusted by the control chip, so that the input flow rate is matched with the output flow rate, and if the input flow rate still cannot be matched after being adjusted for a plurality of times, the operation of the infusion pump 20 is stopped and the alarm is performed; for another example, when the protection chip determines that the output flow rate is matched with the preset injection flow rate, the reason for the mismatch can be determined to be that the dropping speed of the drip cup 10 is too fast, and the drip speed of the drip cup 10 is usually controlled by a human hand, so that an alarm can be directly given to ensure the safety of injection.
It should be noted that, according to the technical scheme of this embodiment, the protection chip can be according to the input velocity of flow and output velocity of flow of citric acid short-term test annotate liquid unusual to respond in time, effectively improve the detection efficiency and the precision of citric acid injection system, ensure annotate liquid safety.
In addition, in an embodiment, referring to fig. 1 and 5, the drip speed detection device includes:
the signal source module comprises a first infrared emission tube 41 and a first infrared receiving tube 51, the first infrared emission tube 41 and the first infrared receiving tube 51 are respectively positioned on two opposite sides of the drip cup 10, the emergent direction of the first infrared emission tube 41 and the incident direction of the first infrared receiving tube 51 are parallel to the liquid level of citric acid of the drip cup 10, and the first infrared receiving tube 51 is used for receiving infrared light emitted by the first infrared emission tube 41 and generating a first receiving signal;
the signal processing module comprises a dropping speed detection receiving module 52 and a square wave output module, the dropping speed detection receiving module 52 comprises a first voltage comparator 54, the first voltage comparator 54 is connected with the first infrared receiving tube 51, the first voltage comparator 54 outputs a voltage comparison signal according to the amplitude of the first receiving signal and a first reference voltage value, the square wave output module is used for outputting dropping speed information to the protection chip, and the dropping speed information is a counting square wave signal generated by the square wave output module according to the voltage comparison signal.
It should be noted that, the first infrared transmitting tube 41 and the first infrared receiving tube 51 may be disposed at a position near the inlet of the drip cup 10, when no citric acid is dropped into the drip cup 10, the infrared light emitted by the first infrared transmitting tube 41 is directly transmitted to the first infrared receiving tube 51, the first infrared receiving tube 51 generates a first receiving signal when receiving the infrared light, and the signal is stable, when the citric acid is dropped into the drip cup 10, the drop of the citric acid will cause refraction of the infrared light, so that the first receiving signal is fluctuated, and the counting of the dropping speed is triggered.
It should be noted that, based on the above description, the signal processing module may be provided with the dropping speed detecting and receiving module 52, and the first reference voltage value of the first voltage comparator 54 is compared with the amplitude of the first receiving signal, for example, when no citric acid is dropped, the amplitude of the first receiving signal is greater than the first reference voltage value, the voltage comparison signal output by the first voltage comparator 54 is high, when the citric acid is dropped, the amplitude of the first receiving signal is reduced to be less than the first reference voltage value due to refraction described above, the voltage comparison signal output by the first voltage comparator 54 is low, after the voltage comparison signal is input into the square wave output module, the two-mode signals may modulate the counting square wave signal, so that the output counting square wave signal has different amplitudes or pulse widths, that is, the change of the first receiving signal caused by the citric acid drop can be represented, and therefore the counting square wave signal can be identified by the protection chip as the dropping speed information to determine the input flow rate of the citric acid.
In addition, in an embodiment, referring to fig. 1 and 3, the signal source module includes a plurality of first infrared emitting tubes 41 and a plurality of first infrared receiving tubes 51, the plurality of first infrared emitting tubes 41 are distributed from top to bottom, the plurality of first infrared receiving tubes 51 are distributed from top to bottom, the number of the first infrared emitting tubes 41 and the number of the first infrared receiving tubes 51 are the same and aligned to two sides of the drip cup 10, and the first infrared emitting tubes 41 and the first infrared receiving tubes 51 located at the lowest measurement are higher than the outlet of the drip cup 10.
It should be noted that, in the actual use process, the citric acid level in the drip cup 10 may be higher or lower, and in this embodiment, a plurality of first infrared transmitting tubes 41 and first infrared receiving tubes 51 are disposed at two sides of the drip cup 10, so that the drip speed detection can be realized from different heights, for example, as shown in fig. 3, 3 first infrared transmitting tubes 41 and 3 first infrared receiving tubes 51 are disposed, and the number of the first infrared transmitting tubes 41 and the first infrared receiving tubes 51 is not excessively limited in this embodiment from top to bottom.
Of course, if the liquid level of the citric acid is lower than the outlet of the drip cup 10, it is an abnormal state of injecting bubbles, and the injection is stopped and an alarm is generated, so the first infrared transmitting tube 41 and the first infrared receiving tube 51 at the lowest side can be higher than the outlet of the drip cup 10.
In addition, in an embodiment, referring to fig. 1, 4 and 5, the drip speed detecting and receiving module 52 includes a plurality of first voltage comparators 54, the first voltage comparators 54 are the same as and uniquely correspond to the first infrared receiving tubes 51, and the drip speed detecting and receiving module 52 further includes:
the input end of the first-stage logical AND module 53 is connected to the output end of the first voltage comparator 54 connected to each of the two first infrared receiving tubes 51 at the uppermost side, the input end of the next-stage logical AND module 53 is connected to the output end of the last-stage logical AND module 53 and the output end of one first voltage comparator 54, the output end of the last-stage logical AND module 53 is connected to the square wave output module, and the square wave output module generates a count square wave signal according to the logic signal output by the last-stage logical AND module 53.
It should be noted that, according to the above embodiment, a plurality of pairs of the first infrared transmitting tube 41 and the first infrared receiving tube 51 may be disposed at different heights, and one or more first receiving signals may be triggered when citric acid is dropped, based on this, the embodiment processes the signals by setting the logical and module 53 to ensure accuracy of drop speed detection, and in order to better explain the technical solution of the present embodiment, the following description will take 3 pairs of the first infrared transmitting tube 41 and the first infrared receiving tube 51 as an example.
Illustratively, the present example is provided with 3 pairs of the first infrared emitting tube 41 and the first infrared receiving tube 51, and is distributed up, down, and middle on the outside of the drip cup 10, as shown in fig. 3, the number of the first voltage comparators 54 is 3, and since the logic and module 53 of the first stage is connected with two first voltage comparators 54, two stages of logic and modules 53 are required. The first voltage comparator 54 connected to the first stage logic and module 53 corresponds to the first infrared receiving tubes 51 at the upper part and the middle part, and the input end of the second stage logic and module 53 is connected to the output end of the first stage logic and module 53 and is connected to the first voltage comparator 54 corresponding to the first infrared receiving tube 51 at the lower part. Taking the example that the voltage comparison signal is 1 when the citric acid is detected to be dropped and 0 is not detected, for example, under the condition that the liquid level is higher, only the voltage comparison signal output by the first voltage comparator 54 at the upper part is 1, the other 2 voltage comparison signals are 0, the logic signal output by the first-stage logic AND module 53 is 10, the logic signal output by the second-stage logic AND module 53 is 100, and the square wave output module outputs a counting square wave signal according to 100; for another example, in the case that the liquid level is in the middle, according to the above description, the voltage comparison signals output by the first voltage comparators 54 of the upper and middle are 1, the voltage comparison signal output by the first voltage comparator 54 of the lower is 0, the logic signal output by the first stage logic and module 53 is 11, the logic signal output by the second stage logic and module 53 is 110, and the square wave output module outputs a count square wave signal according to 110; the same applies when the liquid level is at a lower level, and will not be described in detail here.
In addition, in an embodiment, referring to fig. 3 and 5, a first switching circuit is further connected to the input terminal of each first voltage comparator 54, and the first switching circuit includes a first triode, and the first triode is turned on when the first receiving signal is obtained.
It should be noted that, the first receiving signal generated by the first infrared receiving tube 51 may have a certain fluctuation, so in this embodiment, the input end of the first voltage comparator 54 is provided with a first switch circuit, and the first switch circuit is provided with a first triode, so that the received first receiving signal can be stabilized and the interference signal can be removed through the first triode, thereby improving the stability of the signal.
Additionally, in one embodiment, referring to fig. 1 and 6, the citric acid injection system for continuous kidney replacement therapy further comprises:
the liquid level detection device is arranged on the outer side of the drip cup 10, is in communication connection with the protection chip, and comprises a second infrared emission tube and a liquid level detection receiving module 55, wherein the emergent direction of the second infrared emission tube is parallel to the liquid level of citric acid of the drip cup 10, and the liquid level detection receiving module 55 is used for receiving infrared light emitted by the second infrared emission tube, generating liquid level information and sending the liquid level information to the protection chip;
when the protection chip determines that the current liquid level is higher than the preset upper limit or lower than the preset lower limit according to the liquid level information, the protection chip generates liquid level alarm information.
It should be noted that, the liquid level detecting device and the dripping speed detecting device are similar in arrangement principle, for example, the detecting circuit board 40 shown in fig. 1 is provided with a second infrared transmitting tube, and the receiving circuit board 50 is provided with the liquid level detecting receiving module 55, which is not repeated here.
It should be noted that, by detecting the liquid level of the citric acid in the drip cup 10, it is possible to avoid that the liquid level is too high and too low, for example, when the liquid level is higher than the receiving area of the uppermost first infrared receiving tube 51, the dripping citric acid cannot be detected, and the dripping speed is affected; for another example, when the liquid level is lower than the outlet of the drip cup 10, air is injected into the pump tube 21 to affect the safety of liquid injection, so that the protection chip can set corresponding liquid level alarm information according to the two conditions to ensure the safety of liquid injection.
In addition, in an embodiment, referring to fig. 1 and 6, the liquid level detection receiving module 55 includes:
the second infrared receiving tube is aligned with the second infrared transmitting tube, and the incidence direction of the second infrared receiving tube is parallel to the liquid level of citric acid of the drip cup 10;
the second switching circuit is connected with the second infrared receiving tube and comprises a second triode, and the second triode is conducted after acquiring a second receiving signal generated by the second infrared receiving tube;
the second voltage comparator 56, the second voltage comparator 56 is connected with the second switch circuit, the second voltage comparator 56 is used for outputting a level signal according to a second reference voltage value and a second receiving signal, and the second reference voltage value is adjustable.
It should be noted that, the setting principle of the second switch circuit is the same as that of the first switch circuit, and the second triode can reduce signal interference and improve the stability of the signal, so that repeated description is omitted.
It should be noted that, as described in the above embodiments, citric acid may refract infrared light, so that the amplitude of the second receiving signal is different under different liquid levels, and the second receiving signal is input to the second voltage comparator 56 to be compared to output a level signal, for example, when the level signal is at a high level, the liquid level is in a normal state, otherwise, the liquid level is in an abnormal state to realize an alarm.
The second reference voltage value of the second voltage comparator 56 is adjustable, so that not only the consistency of the detection signal can be ensured, but also the probability of misjudgment of the liquid level detection can be reduced.
In addition, in an embodiment, referring to fig. 1 and 2, further includes:
the first alarm module is connected with the control chip and used for prompting alarm information generated by the control chip;
the second alarm module is connected with the protection chip and used for prompting alarm information generated by the protection chip.
It should be noted that, the control chip is used for controlling the infusion pump 20, and the protection chip is used for detecting the liquid level and the dropping speed, so that the alarm modules can be respectively set for the two chips, thereby distinguishing specific faults.
Illustratively, when the control chip is disconnected from the infusion pump 20, the alarm information is sent to the first alarm module to prompt a maintainer to perform maintenance on the infusion pump 20, and when the control chip detects that the infusion pump 20 is not accurately installed, for example, the alarm information is sent to the first alarm module to prompt a medical staff that the infusion pump 20 is not operable, so as to avoid affecting the infusion safety.
The protection chip sends alarm information to the second alarm module to prompt the medical staff that the input pump stops working and ensure transfusion safety under the condition that the protection chip detects that the input flow rate is not matched with the output flow rate; for another example, under the condition that the protection chip detects that the liquid level in the drip cup 10 is too high or too low, alarm information is sent to the second alarm module to prompt medical staff to remove abnormality in time, so that the use safety of the citric acid injection system is improved.
In addition, in one embodiment, referring to fig. 1, the infusion pump 20 includes:
the stepping motor is in communication connection with the control chip, and determines operation parameters according to control instructions sent by the control chip;
the motor rotating speed detection device is used for detecting the rotating speed of the stepping motor;
the rotor 22, the rotor 22 is abutted with the inner side of the pump tube 21, the rotor 22 rotates under the drive of the stepping motor, and the rotor 22 is used for the citric acid injection liquid tube 30 of the peristaltic pump tube 21;
and the rotor rotating speed detection device is used for detecting the rotating speed of the rotor 22 and sending the rotating speed to the protection chip so that the protection chip determines the output flow speed according to the rotating speed of the rotor 22.
It should be noted that, in this embodiment, the control chip sends a control instruction to the stepper motor to make the stepper motor operate at a preset rotation speed, so as to drive the rotor 22 to rotate to creep the citric acid injection liquid pipe 30, thereby realizing automatic injection of citric acid.
It should be noted that the motor rotation speed detection device and the rotor rotation speed detection device may be implemented by using common hall sensors, and those skilled in the art are well familiar with how to perform rotation speed detection, and will not be described herein.
It should be noted that, since the citric acid is injected under the peristaltic motion of the rotor 22, the structural characteristics of the rotor 22 determine that the rotation speed of the rotor is not equal to that of the stepper motor, so that the output flow rate can be determined by the rotation speed of the rotor 22, thereby improving the control accuracy of the citric acid injection system.
Additionally, in one embodiment, referring to fig. 1 and 2, the piping system further comprises:
the tubing detection module is in communication connection with the control chip, and is used for detecting the installation state of the infusion pump 20, sending installation alarm information to the control module before the completion of the installation of the infusion pump 20 is detected, and stopping sending control instructions to the infusion pump 20 by the control chip under the state that the installation alarm information is acquired.
It should be noted that, the tubing detection module may use a position sensor to detect the installation position of the infusion pump 20, so as to determine whether the installation is completed; or, a pressure sensor may be disposed at a connection port of the infusion pump 20, and after detecting the connection of the pipe, the installation is determined to be completed, and a corresponding sensor type is set according to the actual detection requirement.
It should be noted that, through setting up the tubulation detection module, can be under the condition that transfer pump 20 did not complete the installation, through control chip generation installation alarm information, avoid transfer pump 20 to use the infusion accident that leads to before installing, improve the safety in utilization of citric acid injection system.
Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the embodiments disclosed herein. This application is intended to cover any variations, uses, or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the application pertains.
It is to be understood that the present application is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the application is limited only by the appended claims.
While the preferred embodiment of the present invention has been described in detail, the present invention is not limited to the above embodiment, and various equivalent modifications and substitutions can be made by those skilled in the art without departing from the spirit of the present invention, and these equivalent modifications and substitutions are intended to be included in the scope of the present invention as defined in the appended claims.

Claims (10)

1. A citric acid injection system for continuous kidney replacement therapy comprising:
the pipeline system comprises an infusion pump, a drip cup and a liquid pipe, wherein the drip cup is connected with a pump pipe of the infusion pump, the drip cup is used for dripping citric acid, and the infusion pump is used for peristaltic the citric acid in the pump pipe to be input into the liquid pipe;
the control chip is in communication connection with the infusion pump and is used for controlling the rotating speed of the infusion pump;
the dropping speed detection device is used for detecting the dropping speed of the citric acid of the dropping kettle and generating dropping speed information;
the protection chip is in communication connection with the dripping speed detection device and the control chip, and when the input flow rate and the output flow rate of the citric acid in the pipeline system are not matched, the protection chip sends an adjusting signal to the control chip so that the control chip controls the infusion pump to stop running, wherein the input flow rate is determined according to the dripping speed information, and the output flow rate is determined according to the rotating speed of the infusion pump.
2. The citric acid injection system for continuous kidney replacement therapy according to claim 1, wherein the drip rate detection means comprises:
the signal source module comprises a first infrared emission tube and a first infrared receiving tube, the first infrared emission tube and the first infrared receiving tube are respectively positioned at two opposite sides of the drip cup, the emergent direction of the first infrared emission tube and the incident direction of the first infrared receiving tube are parallel to the liquid level of citric acid of the drip cup, and the first infrared receiving tube is used for receiving infrared light emitted by the first infrared emission tube and generating a first receiving signal;
the signal processing module comprises a dripping speed detection receiving module and a square wave output module, the dripping speed detection receiving module comprises a first voltage comparator, the first voltage comparator is connected with the first infrared receiving tube, the first voltage comparator outputs a voltage comparison signal according to the amplitude of the first receiving signal and the first reference voltage value, the square wave output module is used for outputting dripping speed information to the protection chip, and the dripping speed information is a counting square wave signal generated by the square wave output module according to the voltage comparison signal.
3. The citric acid injection system for continuous kidney substitution therapy according to claim 2, wherein the signal source module comprises a plurality of the first infrared transmitting tubes and a plurality of the first infrared receiving tubes, the plurality of the first infrared transmitting tubes are distributed from top to bottom, the plurality of the first infrared receiving tubes are distributed from top to bottom, the number of the first infrared transmitting tubes and the number of the first infrared receiving tubes are the same and are aligned to two sides of the drip cup, and the first infrared transmitting tubes and the first infrared receiving tubes which are positioned at the lowest measurement are higher than the outlet of the drip cup.
4. The citric acid injection system for continuous kidney replacement therapy according to claim 3, wherein the drip rate detection receiving module comprises a plurality of the first voltage comparators, the first voltage comparators being the same as and uniquely corresponding to the first infrared receiving tubes, the drip rate detection receiving module further comprising:
the input end of the logic AND module positioned at the first stage is connected with the output ends of the first voltage comparators respectively connected with the two first infrared receiving tubes positioned at the uppermost stage, the input end of the logic AND module positioned at the next stage is connected with the output end of the logic AND module positioned at the previous stage and the output end of one first voltage comparator, the output end of the logic AND module positioned at the last stage is connected with the square wave output module, and the square wave output module generates the counting square wave signal according to the logic signals output by the logic AND module positioned at the last stage.
5. The citric acid injection system for continuous kidney replacement therapy according to claim 4, wherein a first switching circuit is further connected to the input of each of the first voltage comparators, the first switching circuit comprising a first transistor, the first transistor being turned on when the first received signal is obtained.
6. The citric acid injection system for continuous kidney replacement therapy according to claim 1, further comprising:
the liquid level detection device is arranged on the outer side of the drip cup, is in communication connection with the protection chip, and comprises a second infrared emission tube and a liquid level detection receiving module, the emergent direction of the second infrared emission tube is parallel to the liquid level of citric acid of the drip cup, and the liquid level detection receiving module is used for receiving infrared light emitted by the second infrared emission tube, generating liquid level information and sending the liquid level information to the protection chip;
and when the protection chip determines that the current liquid level is higher than the preset upper limit or lower than the preset lower limit according to the liquid level information, the protection chip generates liquid level alarm information.
7. The citric acid injection system for continuous kidney replacement therapy of claim 6, wherein the fluid level detection receiving module comprises:
the second infrared receiving tube is aligned with the second infrared transmitting tube, and the incidence directions of the second infrared receiving tube are parallel to the liquid level of the citric acid of the drip cup;
the second switching circuit is connected with the second infrared receiving tube and comprises a second triode, and the second triode is conducted after acquiring a second receiving signal generated by the second infrared receiving tube;
the second voltage comparator is connected with the second switch circuit and is used for outputting a level signal according to a second reference voltage value and the second receiving signal, and the second reference voltage value is adjustable.
8. The citric acid injection system for continuous kidney replacement therapy of claim 1, further comprising:
the first alarm module is connected with the control chip and is used for prompting alarm information generated by the control chip;
the second alarm module is connected with the protection chip and is used for prompting alarm information generated by the protection chip.
9. The citric acid injection system for continuous kidney replacement therapy according to claim 1, wherein the infusion pump comprises:
the stepping motor is in communication connection with the control chip, and the stepping motor determines operation parameters according to control instructions sent by the control chip;
the motor rotating speed detection device is used for detecting the rotating speed of the stepping motor;
the rotor is abutted with the inner side of the pump pipe and driven by the stepping motor to rotate, and the rotor is used for peristaltic citric acid of the pump pipe to be injected into the liquid pipe;
and the rotor rotating speed detection device is used for detecting the rotating speed of the rotor and sending the rotating speed to the protection chip so that the protection chip can determine the output flow speed according to the rotating speed of the rotor.
10. The citric acid injection system for continuous kidney replacement therapy of claim 9, wherein the tubing system further comprises:
the tubing detection module is in communication connection with the control chip, and is used for detecting the installation state of the infusion pump, sending installation alarm information to the control module before the completion of the installation of the infusion pump is detected, and stopping sending the control instruction to the infusion pump by the control chip in the state of acquiring the installation alarm information.
CN202310077576.7A 2023-01-19 2023-01-19 Citric acid injection system for continuous kidney substitution treatment Pending CN116115862A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310077576.7A CN116115862A (en) 2023-01-19 2023-01-19 Citric acid injection system for continuous kidney substitution treatment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310077576.7A CN116115862A (en) 2023-01-19 2023-01-19 Citric acid injection system for continuous kidney substitution treatment

Publications (1)

Publication Number Publication Date
CN116115862A true CN116115862A (en) 2023-05-16

Family

ID=86311368

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310077576.7A Pending CN116115862A (en) 2023-01-19 2023-01-19 Citric acid injection system for continuous kidney substitution treatment

Country Status (1)

Country Link
CN (1) CN116115862A (en)

Similar Documents

Publication Publication Date Title
CA2024436C (en) Ultrasonic air-in-line detector self-test technique
US4838856A (en) Fluid infusion flow control system
US5064412A (en) Ultrasonic air-in-line detector for a medication infusion system
JP2537845B2 (en) Sensing device for checking fluid tubes
CA2024425C (en) Automatic tubing lock for ultrasonic sensor interface
US5176631A (en) Ultrasonic air-in-line detector for detecting entrained air in a medication infusion system
US4966579A (en) Apparatus for dosed continuous simultaneous infusion of a plurality of infusion solutions or medicaments
US4596550A (en) Method and apparatus for ultrafiltration measurement in a two pump dialysis system
CN101189509B (en) Method and device for monitoring a flow of liquid for the presence of air by means of ultrasound
US4470758A (en) Intravenous fluid pump monitor
AU2010338448B2 (en) System and method for monitoring the presence of blood
US20130233798A1 (en) Blood treatment device
US8715215B2 (en) Method for verifying and/or monitoring the correct function of a supply device
MXPA02006732A (en) Occlusion detection method and system for ambulatory drug infusion pump.
IL120651A (en) Administration of liquid to a patient
WO2016025303A1 (en) Peristaltic pump with flow control system having downstream ultrasound occlusion and air bubble sensor
US9474846B2 (en) System and method for detecting venous needle dislodgement
EP1155298B1 (en) Method and apparatus for testing simultaneously a plurality of differential pressure sensors
AU2014270517B2 (en) Method and device for monitoring an extracorporeal blood circuit
CN116115862A (en) Citric acid injection system for continuous kidney substitution treatment
EP2876418B1 (en) Optical flow measuring device and method of operation
US5126616A (en) Ultrasonic transducer electrical interface assembly
US10532140B2 (en) System comprising a plurality of medical devices, preferably dialysis devices, and methods of operating same
CN113975508B (en) Failure determination method for blood purification device, and storage medium
AU2018250445A1 (en) Pneumatic manifold for a dialysis system

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination