CN117045899A - Alarm device of electronic infusion pump - Google Patents
Alarm device of electronic infusion pump Download PDFInfo
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- CN117045899A CN117045899A CN202310862962.7A CN202310862962A CN117045899A CN 117045899 A CN117045899 A CN 117045899A CN 202310862962 A CN202310862962 A CN 202310862962A CN 117045899 A CN117045899 A CN 117045899A
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- photoelectric sensor
- pipeline
- infusion
- medicine box
- push rod
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- 238000001802 infusion Methods 0.000 title claims abstract description 75
- 239000003814 drug Substances 0.000 claims abstract description 45
- 230000003993 interaction Effects 0.000 claims abstract description 12
- 230000001681 protective effect Effects 0.000 claims abstract description 12
- 230000007246 mechanism Effects 0.000 claims abstract description 5
- 239000003978 infusion fluid Substances 0.000 abstract description 12
- 238000000034 method Methods 0.000 abstract description 12
- 230000008569 process Effects 0.000 abstract description 11
- 229940079593 drug Drugs 0.000 abstract description 4
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 description 13
- 230000000903 blocking effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000000007 visual effect Effects 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000000741 silica gel Substances 0.000 description 3
- 229910002027 silica gel Inorganic materials 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005381 potential energy Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- POIUWJQBRNEFGX-XAMSXPGMSA-N cathelicidin Chemical compound C([C@@H](C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CO)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CCC(O)=O)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H]([C@@H](C)CC)C(=O)NCC(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CCC(O)=O)C(=O)N[C@@H](CC=1C=CC=CC=1)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H]([C@@H](C)CC)C(=O)N[C@@H](C(C)C)C(=O)N[C@@H](CCC(N)=O)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H]([C@@H](C)CC)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CC(O)=O)C(=O)N[C@@H](CC=1C=CC=CC=1)C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H](CC(N)=O)C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](C(C)C)C(=O)N1[C@@H](CCC1)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H]([C@@H](C)O)C(=O)N[C@@H](CCC(O)=O)C(=O)N[C@@H](CO)C(O)=O)NC(=O)[C@H](CC=1C=CC=CC=1)NC(=O)[C@H](CC(O)=O)NC(=O)CNC(=O)[C@H](CC(C)C)NC(=O)[C@@H](N)CC(C)C)C1=CC=CC=C1 POIUWJQBRNEFGX-XAMSXPGMSA-N 0.000 description 1
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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
- A61M5/16831—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
- A61M5/142—Pressure infusion, e.g. using pumps
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)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The invention relates to an electronic infusion pump alarm device which comprises a host, a medicine box and an infusion pipeline. The host comprises an MCU controller, a motor, an infusion execution mechanism, a linear push rod motor, a first photoelectric sensor, a second photoelectric sensor, a pressure sensor, a man-machine interaction module and a power module; the infusion pipeline comprises a first filter, a second filter, a bypass pipe, a flow stopping clamp, a pipeline, a dosing device and a protective cap, wherein the drug box comprises a drug box top block, an infusion pipe clamping groove, a spring and a spring piece; the pipeline infusion pipeline is arranged in the clamping groove of the medicine box, the flow stopping is realized through the medicine box top block and the spring on the medicine box, the medicine box is arranged on the host computer, the host computer judges whether bubbles exist and alarms through the voltage comparison and state conversion process collected by the first photoelectric sensor and the second photoelectric sensor, the host computer collects the pressure of infusion liquid through the pressure sensor to realize pressure alarm, the alarm is more reliable, and the infusion is safer.
Description
Technical Field
The invention belongs to the technical field of medical appliances, and particularly relates to an electronic infusion pump alarm device.
Background
The electronic infusion pump is a device for continuously infusing medicines, and can effectively control the infusion speed, and bubbles possibly can be generated in the infusion process due to the influence of factors such as unsmooth wall of the infusion tube and the like in the use process of the infusion pump, and can enter a human body along with liquid. The infusion process may be blocked due to bending and compression of the tube, and the like, and the special standard of the electronic infusion pump product GB 9706.224-2021 (medical electrical equipment parts 2-24): the electronic infusion pump has the functions of blocking detection and alarm and bubble detection and alarm, which not only reduces nursing workload, but also improves infusion safety. At present, the following modes are commonly adopted for blocking alarm and bubble alarm of mature products sold in the market: the pressure sensor detects blockage: the basic principle is as follows: once the pipeline is blocked and expanded, the pressure sensor detects the pressure and then alarms; detecting the voltage and current values of the driving motor to judge whether the pipeline is blocked, detecting whether bubbles exist in the pipeline by the infrared sensor, detecting whether bubbles exist in the pipeline by the ultrasonic sensor, and exhausting air out of the pipeline by adopting a filter with an exhaust hole.
The prior art solves the problem that the bubble detection is generally processed by adopting three modes of an infrared sensor, ultrasonic waves and an exhaust hole filter, and the exhaust hole filter is complex in process and high in cost, and the problem of liquid leakage easily occurs at the exhaust hole, so that the bubble detection is not basically adopted at present. As described in chinese patent CN106237436 a, the ultrasonic detection has the disadvantages of high driving voltage, small sensitivity, small frequency range, etc., and the present technology mainly adopts an infrared sensor technology to detect bubbles, and the disclosed working principle is as follows: an infrared sensor or an ultrasonic sensor is placed at the installation position of a silica gel tube of the electronic infusion pump, the sensor is U-shaped, the silica gel tube is clamped in the middle, light waves are emitted through the emitting end of the sensor, the voltage values received by the light waves through liquid or air are different, the fluctuating voltage values are converted into stable voltage values through an A/D converter and are transmitted to a singlechip, the singlechip is compared with a preset value, and an alarm is given when the voltage values exceed the preset value. The defects of the method are as follows: the single photoelectric technology is adopted to detect bubbles, and the voltage acquired when the bubbles exist can change, but in the actual clinical use process, the problems of false alarm and missing alarm exist due to the influence of a tube, illumination and medicine infusion, and the alarm is not accurate enough.
The detection mode for solving the problem of pipeline blockage at present mainly adopts a pressure sensor, a physical trigger switch and a judgment motor voltage value to process, and the specific working principle is as follows: when the infusion pipeline is blocked, the pressure on the surface of the silica gel tube is increased, the pressure sensor transmits the received different voltage values to the singlechip for comparison, and an alarm is given when the voltage values exceed a preset value; the physical trigger switch is similar to the pressure sensor, when the infusion pipeline is blocked, the elastic film body can expand and deform and trigger the switch to send a blocking alarm; the last blocking alarm mode is to judge the voltage value or the current value of the motor, as disclosed in patent publication CN 107091948A, when the infusion tube is blocked, the load of the motor will change, the current or the voltage value output by the motor will change, and when the voltage value exceeds the preset voltage value, a blocking alarm will be sent. In the actual clinical use process, the pressure of the tube wall is easy to be influenced by the stress of the tube material and the tube, so that the detection has deviation, and the false alarm and the alarm are easy to occur.
Disclosure of Invention
The invention aims to provide an electronic infusion pump alarm device which is used for solving the problems in the background technology. The specific scheme is as follows:
an electronic infusion pump alarm device comprises a host, a medicine box and an infusion pipeline, wherein the host comprises an MCU (micro control unit) controller, a motor, an infusion execution mechanism, a linear push rod motor, a first photoelectric sensor, a second photoelectric sensor, a pressure sensor, a man-machine interaction module and a power supply module; the first photoelectric sensor and the second photoelectric sensor are used for detecting bubbles, and when the voltage detected by the first photoelectric sensor and the voltage detected by the second photoelectric sensor are sequentially met; the voltage value detected by the first photoelectric sensor is larger than the voltage value detected by the second photoelectric sensor; the voltage value detected by the first photoelectric sensor is equal to the voltage value detected by the second photoelectric sensor; the voltage value detected by the first photoelectric sensor is smaller than the voltage value detected by the second photoelectric sensor; and when the first photoelectric sensor detects that the voltage value is equal to the voltage value detected by the second photoelectric sensor, judging that the air bubble exists.
The second photosensor is 10mm from the first photosensor. To ensure that no more than 0.04mL of bubbles can be detected.
The man-machine interaction module comprises an LCD display screen, keys and an alarm. The key is used for completing system input, the LCD screen is used for completing system output display, the alarm is used for completing system audible and visual alarm, the MCU controller of the host computer is used for collecting the pressure of the infusion liquid through the pressure sensor, when the pressure exceeds a threshold value, the blockage is judged, the audible and visual alarm is realized through the human-computer interaction module, the key setting is received and output to the LCD display, and the motor is driven according to the user setting to push the infusion execution structure to complete the infusion.
The power module is formed by connecting 4 1.5-volt batteries in parallel, and provides power for the host, the motor and the LCD display screen through voltage conversion.
The infusion pipeline comprises a first filter, a second filter, a bypass pipe, a flow stopping clamp, a pipeline, a dosing device and a protective cap.
The linear push rod motor pushes the push rod to move, the push rod is of a U-shaped structure, the width of a U-shaped groove of the push rod is larger than the diameter of a pipeline, and the depth of the U-shaped groove is larger than the diameter of the pipeline. This design prevents the tubing from being compressed.
The pipeline is provided with a dosing device, a flow stopping clamp, a second filter and a protective cap, the dosing device is provided with a dosing protective cap, the pipeline is provided with a bypass pipe, the bypass pipe is provided with a first filter, and one end of the bypass pipe is connected with a pressure sensor of a host. The first filter is mainly used for filtering infusion liquid, preventing impurities from entering a human body, the bypass pipe is mainly used for realizing pressure detection of the infusion liquid, the second filter is used for isolating the bypass pipe for realizing pressure sampling from the infusion liquid, preventing the infusion liquid from being polluted, and the flow stopping clamp is mainly used for realizing manual flow stopping and is arranged between the dosing device and the second filter to finish manual flow stopping.
The medicine box comprises a shell, an elastic sheet, a medicine box top block, an infusion tube clamping groove and a spring.
The medicine box ejector block is characterized in that a spring is arranged at one end of the medicine box ejector block, the other end of the spring is connected with a spring piece and arranged on the shell, the linear push rod motor pushes the push rod to move, and the push rod is used for pushing the medicine box ejector block. The infusion pipeline is in a flow stopping state under the action of elastic potential energy of the spring.
Compared with the prior art, the invention has the beneficial effects that:
(1) The invention provides an electronic infusion pump alarm device, which is used for detecting 0.04mL of minimum bubbles through a first photoelectric sensor and a second photoelectric sensor, realizing a dynamic detection process through state changes of the two photoelectric sensors, realizing detection of variable quantity and effectively eliminating the influence of a tube, ambient light and infused medicines on detection.
(2) The invention provides an electronic infusion pump alarm device, which directly collects the pressure of infusion liquid (realizes detection on a bypass pipe) and is not influenced by the ambient temperature, the pipe material, the stress of the pipe and the like, so that the alarm is more accurate and reliable.
(3) The invention provides an electronic infusion pump alarm device, which realizes automatic flow stopping through a spring and a top block on a medicine box, prevents infusion under the action of dead weight under the fault state, and simultaneously can realize the infusion process under the control of a host only if the medicine box is correctly installed and the host works normally, and the top block on the medicine box is not pushed open and is in a flow stopping state when the host does not work, so that the safety of infusion is effectively ensured.
Drawings
FIG. 1 is a schematic diagram of an electronic infusion pump alarm device;
FIG. 2 is a schematic diagram of a host connection of an electronic infusion pump alarm device;
FIG. 3 is a schematic diagram of a cartridge of an electronic infusion pump alarm device;
fig. 4 is a schematic diagram of an infusion tube of an electronic infusion pump alarm device.
Wherein the reference numerals: 11. a first filter; 12. a second filter; 13. a bypass tube; 14. a flow stop clip; 15. a pipeline; 16. a dosing device; 17. a protective cap; 18. a protective cap for adding medicine; 21. a housing; 22. a spring plate; 23. a cartridge top block; 24. a transfusion tube clamping groove; 25. a spring; 26. a push rod.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-4, the present invention provides a technical solution for an electronic infusion pump alarm device:
as shown in fig. 1 and 4, an alarm device for an electronic infusion pump comprises a medicine box, a main machine and an infusion pipeline, wherein the infusion pipeline is arranged on the medicine box, the medicine box is arranged on the main machine, the infusion pipeline mainly comprises a first filter 11, a second filter 12, a bypass pipe 13, a flow stopping clamp 14, a pipeline 15, a medicine adding device 16 and a protective cap 17, the pipeline 15 is provided with the medicine adding device 16, the flow stopping clamp 14, the second filter 12 and the protective cap 17, the medicine adding device 16 is provided with the medicine adding protective cap 18, the pipeline 15 is provided with the bypass pipe 13, the bypass pipe 13 is provided with the first filter 11, and one end of the bypass pipe 13 is connected with a pressure sensor of the main machine. The first filter 11 is mainly used for filtering infusion liquid to prevent impurities from entering a human body, the bypass pipe 13 is mainly used for realizing pressure detection of the infusion liquid, the second filter 12 is used for isolating the bypass pipe 13 for realizing pressure sampling from the infusion liquid to prevent the infusion liquid from being polluted, the stop clamp 14 is mainly used for realizing manual stop, the stop clamp 14 is arranged between the dosing device 16 and the second filter 12 to finish manual stop, and the pipeline 15 and the bypass pipe 13 all comprise a silicone tube and a joint.
As shown in fig. 1 and 2, an electronic infusion pump alarm device comprises a medicine box, a host and an infusion pipeline, wherein the host comprises an MCU controller, a motor, an infusion executing mechanism, a linear push rod motor, a first photoelectric sensor, a second photoelectric sensor, a pressure sensor, a man-machine interaction module and a power module (the power module is formed by connecting 4 1.5 v batteries in parallel, and provides power for the host, the motor and an LCD display screen through voltage transformation). The MCU controller receives an infusion instruction input by the man-machine interaction module, drives the linear push rod motor to push the push rod 26, pushes the medicine box top block 23 on the medicine box, enables the infusion pipeline to be in an infusion state, controls the motor to rotate, realizes extrusion infusion through the execution mechanism, acquires the pressure of infusion liquid through the pressure sensor, judges blockage when the pressure exceeds a certain threshold, and realizes audible and visual alarm through the man-machine interaction module; MCU controller gathers voltage through first photoelectric sensor and second photoelectric sensor, and first photoelectric sensor and second photoelectric sensor mounting distance are less than 10mm to guarantee to detect the bubble that is less than 0.04ml size, first photoelectric sensor mounted position is close to the play medicine outlet end of medicine box, when having the bubble, its judgement process is in proper order: the first photoelectric sensor detects the voltage value equal to the voltage value detected by the second photoelectric sensor, and the voltage values are smaller, along with the movement of the bubble, the first photoelectric sensor detects the voltage value greater than the voltage value detected by the second photoelectric sensor, along with the further movement of the bubble, the first photoelectric sensor detects the voltage value equal to the voltage value detected by the second photoelectric sensor, and the voltage values are larger, along with the further movement of the bubble, the first photoelectric sensor detects the voltage value smaller than the voltage value detected by the second photoelectric sensor, along with the further movement of the bubble, the first photoelectric sensor detects the voltage value equal to the voltage value detected by the second photoelectric sensor, and the voltage values are smaller, then the bubble is judged to exist, and meanwhile, the MCU controller realizes the acousto-optic alarm through the human-computer interaction module. The power module includes battery and power management, provides the power for whole device, and man-machine interaction module includes: the device comprises keys, an LCD display screen and an audible and visual alarm, the information interaction between the device and a person is completed, the system input is completed through the keys, the system output display is completed through the LCD screen, the key setting is received and output to the LCD display, and the motor is driven according to the user setting to push the infusion execution structure to complete the infusion.
As shown in fig. 1 and 3, an alarm device for an electronic infusion pump comprises a medicine box, a main machine and an infusion pipeline, wherein the medicine box is shown in fig. 3 and comprises a medicine box top block 23, an infusion pipe clamping groove 24 and a spring 25. In the infusion tube clamping groove 24 on the medicine box is installed to the pipeline 15, the spring 25 is installed to medicine box kicking block 23 one end, the shell fragment 22 is connected to the spring 25 other end and install on casing 21, when installing pipeline 15, compress spring 25, after the pipe is installed, under the effect of the elastic potential energy of spring 25, make pipeline 15 be in the stagnant flow state by means of the effect of medicine box kicking block 23, after the medicine box is installed on the host computer, MCU controller in the host computer starts, drive sharp push rod motor, promote push rod 26 (the push rod is U type structure, its U type groove width is greater than the diameter of pipeline, its degree of depth is greater than the diameter of pipeline this design, in order to prevent that the pipeline from being pressed), and begin the infusion according to user's setting, when the host computer is not installed correctly or work is unusual, can't drive sharp push rod motor, pipeline 15 is in the stagnant flow state.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. An electronic infusion pump alarm device, includes host computer, medicine box and infusion pipeline, its characterized in that: the host comprises an MCU controller, a motor, an infusion executing mechanism, a linear push rod motor, a first photoelectric sensor, a second photoelectric sensor, a pressure sensor, a man-machine interaction module and a power module; the first photoelectric sensor and the second photoelectric sensor are used for detecting bubbles, and when the voltage detected by the first photoelectric sensor and the voltage detected by the second photoelectric sensor are sequentially met; the voltage value detected by the first photoelectric sensor is larger than the voltage value detected by the second photoelectric sensor; the voltage value detected by the first photoelectric sensor is equal to the voltage value detected by the second photoelectric sensor; the voltage value detected by the first photoelectric sensor is smaller than the voltage value detected by the second photoelectric sensor; and when the first photoelectric sensor detects that the voltage value is equal to the voltage value detected by the second photoelectric sensor, judging that the air bubble exists.
2. An electronic infusion pump alarm device as set forth in claim 1, wherein: the second photosensor is 10mm from the first photosensor.
3. An electronic infusion pump alarm device as set forth in claim 1, wherein: the man-machine interaction module comprises an LCD display screen, keys and an alarm.
4. An electronic infusion pump alarm device as set forth in claim 1, wherein: the infusion pipeline comprises a first filter, a second filter, a bypass pipe, a flow stopping clamp, a pipeline, a dosing device and a protective cap.
5. An electronic infusion pump warning device as in claim 4, wherein: the linear push rod motor pushes the push rod to move, the push rod is of a U-shaped structure, the width of a U-shaped groove of the push rod is larger than the diameter of a pipeline, and the depth of the U-shaped groove is larger than the diameter of the pipeline.
6. An electronic infusion pump warning device as in claim 4, wherein: the pipeline is provided with a dosing device, a flow stopping clamp, a second filter and a protective cap, the dosing device is provided with a dosing protective cap, the pipeline is provided with a bypass pipe, the bypass pipe is provided with a first filter, and one end of the bypass pipe is connected with a pressure sensor of a host.
7. An electronic infusion pump alarm device as set forth in claim 1, wherein: the medicine box comprises a shell, an elastic sheet, a medicine box top block, an infusion tube clamping groove and a spring.
8. An electronic infusion pump warning device as in claim 7, wherein: the medicine box ejector block is characterized in that a spring is arranged at one end of the medicine box ejector block, the other end of the spring is connected with a spring piece and arranged on the shell, the linear push rod motor pushes the push rod to move, and the push rod is used for pushing the medicine box ejector block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310862962.7A CN117045899A (en) | 2023-07-14 | 2023-07-14 | Alarm device of electronic infusion pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310862962.7A CN117045899A (en) | 2023-07-14 | 2023-07-14 | Alarm device of electronic infusion pump |
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| Publication Number | Publication Date |
|---|---|
| CN117045899A true CN117045899A (en) | 2023-11-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310862962.7A Pending CN117045899A (en) | 2023-07-14 | 2023-07-14 | Alarm device of electronic infusion pump |
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2023
- 2023-07-14 CN CN202310862962.7A patent/CN117045899A/en active Pending
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| CN104721909A (en) * | 2015-01-04 | 2015-06-24 | 涂家海 | Air evacuation detecting device for injection pump |
| CN106693108A (en) * | 2015-08-23 | 2017-05-24 | 由国峰 | Self-control electronic analgesia perfusion pump device |
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