CN104645454A - Medical venous transfusion monitor - Google Patents
Medical venous transfusion monitor Download PDFInfo
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- CN104645454A CN104645454A CN201510108052.5A CN201510108052A CN104645454A CN 104645454 A CN104645454 A CN 104645454A CN 201510108052 A CN201510108052 A CN 201510108052A CN 104645454 A CN104645454 A CN 104645454A
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- speed
- infrared
- drip
- dripping
- fast
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- 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
- A61M5/1684—Monitoring, detecting, signalling or eliminating infusion flow anomalies by detecting the amount of infusate remaining, e.g. signalling end of infusion
- A61M5/1685—Monitoring, detecting, signalling or eliminating infusion flow anomalies by detecting the amount of infusate remaining, e.g. signalling end of infusion by detection of position of a floating member
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- 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
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- 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
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/18—General characteristics of the apparatus with alarm
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- 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
-
- 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
- A61M2205/3341—Pressure; Flow stabilising pressure or flow to avoid excessive variation
Abstract
The invention discloses a medical venous transfusion monitor. The medical venous transfusion monitor comprises a detecting circuit and a control circuit, wherein the detecting circuit consists of infrared pair transistors and a voltage comparator. The medical venous transfusion monitor is characterized in that two or more than two groups of infrared pair transistors are arranged, wherein each group of infrared pair transistors is arranged on the same height position of a drip cup; the threshold value voltage is one half the sum of output voltage when the infrared pair transistors mounted on the drip cup are shielded by medical drops and output voltage when the infrared pair transistors mounted on the drip cup are unshielded by the medical drops. A monitoring method comprises the following steps: a), connecting equipment; b), selecting liquid types; c), setting a dripping speed alarm range; d), setting reference dripping speed; e), obtaining existing dripping speed; f) performing dripping speed ultra-limit judgment; g), judging drug flow-empty. According to the monitor and the monitoring method disclosed by the invention, false detection and leakage detection of a conventional transfusion alarm are avoided, whether the current dripping speed and the liquid medicine are emptied or not can be judged, the beneficial effects are remarkable, and the application and the popularization are convenient.
Description
Technical field
The present invention relates to a kind of Medical venous transfusion monitoring device, in particular, particularly relate to a kind of by how group infrared tube realizes the fast detection of medicament dropping and can carry out a Medical venous transfusion monitoring device for medicinal liquid stream sky and a fast over range warning.
Background technology
Venous transfusion is the operation item of extensive use in modern medical service activity.Under normal circumstances, patient or entourage is needed to assist nursing staff's continuous observation transfusion progress during patient infusion.Because transfusion time is often longer, patient or entourage neglect unavoidably, and can not flow sky by liquid in Timeliness coverage infusion bottle, cause patient's vein blood back, cause unnecessary loss and misery, even threaten patient vitals.The quiet dropping liquid of variety classes or concentration needs different transfusion speeds usually, and clinically, nursing staff drips number often through the transfusion of statistics certain hour angular vein, or rule of thumb carrys out rough estimate quiet speed, and poor accuracy, even may cause malpraxis.It is usually not enough that various big hospital medical personnel configure quantity, if nursing staff utilizes timer to calculate drip speed, then efficiency is poor, wastes a large amount of nursing resource.Therefore, in real time, accurately can show in the urgent need to a kind of the equipment dripping speed clinically.In addition, on the basis that accurately current of display is fast, for exceeding predetermined situation of dripping fast scope, needs can give the alarm signal, thus avoid dripping speed in quiet process and change the malpraxis caused.
At present, what conventional infusion monitor adopted is based on infrared tube voltage monitoring technology, if patent publication No. is CN201572367, denomination of invention is the utility model patent file of " infrared infusion alarm device ", and patent publication No. is CN202777298, denomination of invention is the utility model patent file of " a kind of infusion alarm ", all disclose the infusion alarm utilizing infrared tube voltage monitoring technology, the infrared tube being arranged on tube for transfusion both sides is utilized to detect the break-make of liquid in pipe, can only judge whether liquid has flowed, transfusion drip speed can not be detected, the change of transfusion drip speed can not be detected.And, because infrared ray exists different through performances to different tube for transfusions (as brown or transparent) and different quiet dropping liquids (achromatism and clarity, coloured clear and bright, translucent, opaque), that is, benchmark sampled voltage in normal infusion process is not quite similar, sampled voltage after liquid stream sky during blank pipe also there are differences, therefore, often cause and misrepresent deliberately alert to carrying out triggered alarm by sampled voltage under different situations or fail to report police.
For another example the patent No. is CN201410009845.7, denomination of invention is the patent of invention file of " a kind of Medical venous transfusion alarm ", disclose a kind of infusion alarm, it adopts the infrared tube being arranged at tube for transfusion both sides whether to flow empty detection to realize liquid, and medicinal liquid can not be detected drip speed, and infrared tube is arranged on tube for transfusion, there is larger metrical error.
Infusion pump can control transfusion device and instil according to certain speed of dripping, its principle usually adopts and controls motor realization to the control of dripping speed, as patent openly after number be CN102949760A, denomination of invention is the patent document of " Intelligent guardianship infusion pump ", and patent publication No. is CN1759891, denomination of invention is the patent document of " a kind of infusion pump in medical application ", the infusion pump all disclosed dripping speed control is entered, the usual volume of this equipment is large, complicated operation, involve great expense, and need special training, can only promote in special transfusion place in intensive care unit etc., or public ward has during special drug infusion and just can adopt, therefore, under present condition, be difficult to carry out extensive use at public ward.
Summary of the invention
The present invention, in order to overcome the shortcoming of above-mentioned technical problem, provides a kind of Medical venous transfusion monitoring device.
Medical venous transfusion monitoring device of the present invention, comprise for measuring the testing circuit that whether has medicine to drip and testing circuit being exported to the control circuit processed, described testing circuit is made up of infrared tube and voltage comparator; Its special feature is: described infrared tube is two groups or more, often organizes infrared tube and is all arranged at the sustained height position of dripping kettle; Often organize infrared tube by laying respectively at the infrared emission tube and infrared receiver tube composition that drip kettle both sides; The output of infrared receiver tube side is connected with the voltage input end mouth of voltage comparator, to realize and the comparing of voltage reference port upper threshold voltage on voltage comparator;
On voltage comparator, the size of voltage reference port upper threshold voltage is: be installed on the infrared tube dripped on kettle and dripped output voltage when blocking by medicine and do not dripped 1/2nd of output voltage sum when blocking by medicine.
Medical venous transfusion monitoring device of the present invention, the number of described infrared tube is two groups, infrared emission tube in one group of infrared tube and infrared receiver tube horizontally-opposed in dripping the both sides of kettle, another group infrared tube is then opposite to criss-cross fashion with first group of infrared tube and drips kettle both sides.
Medical venous transfusion monitoring device of the present invention, described voltage comparator is two-way voltage compare chip LM393, often the infrared emission tube organized in infrared tube is connected between positive source and ground after connecting with current-limiting resistance, and infrared receiver tube is connected between positive source and ground after connecting with current-limiting resistance; Infrared receiver tube in two groups of infrared tubes is connected with the different voltage input end mouths of LM393 from the junction of current-limiting resistance, the Voltage Reference port of LM393 is connected with ground with positive source respectively through different divider resistances, the two-way output port of LM393 forms interrupt signal INTO, and interrupt signal INTO is connected with control circuit.
Medical venous transfusion monitoring device of the present invention, described control circuit is made up of microcontroller and coupled power module, clock circuit, key-press module, LCDs and sound light alarming circuit, and the interrupt signal INT0 that voltage comparator exports is connected with the input of microcontroller; Key-press module comprises class of liquids selection key, with reference to dripping speed setting button and dripping fast alarm range setting button;
Time difference between microcontroller drips according to adjacent two medicines, obtain transfusion device current drip speed, if drip speed to drip/min for N, and speed will be dripped by LCDs and show; Microcontroller by the current fast N that will obtain with reference to dripping compared with speed, can judge current speed with reference to whether within the specific limits dripping fast difference, if exceed certain limit, then send alarm signal; If under microcontroller detects and do not have medicine to drip within the time period of setting, then show that dripping medicine terminates, and sends sound and light alarm signal.
Medical venous transfusion monitoring device of the present invention, described sound light alarming circuit is made up of voice alarm circuit and light alarm circuit, voice alarm circuit is made up of speech chip and speaker circuit, the control end of speech chip is connected with the outfan of microprocessor, and the outfan of speech chip is connected with speaker circuit; The control end of sound light alarming circuit is connected with the outfan of microcontroller.
Medical venous transfusion monitoring device of the present invention, described power module is made up of rechargeable battery, charging management chip cn3062, power management chip HT7033 and charging inlet; The input of charging management chip cn3062 is connected with charging inlet, and outfan is connected with rechargeable battery; The detection port of power management chip HT7033 is connected with the positive pole of rechargeable battery.
The method for supervising of Medical venous transfusion monitoring device of the present invention, its special feature is, being realized by following steps: a). equipment connection, is arranged at the dripping kettle on of transfusion device by by organizing the testing circuit that infrared tube forms more, and is connected with control circuit by testing circuit; B). class of liquids is selected, and after open control circuit, choose corresponding class of liquids by class of liquids selection key, different class of liquids has different droplet sizes; C). drip the setting of a fast alarm range, drip a fast alarm range setting button by pressing, fast over range warning numerical value is dripped in setting, if set warning numerical value be ± x%, when detect drip speed exceed with reference to drip fast ± x% time, then send alarm signal; D). with reference to the setting of dripping speed, medical personnel open transfusion device, according to the injection requirement of current injectable drug, while observing LCDs shown speed, current speed is made to reach desirable value by the speed regulator on transfusion device, and press with reference to dripping speed setting button, current speed is set as with reference to dripping speed, if be M with reference to dripping speed; E). current fast acquisition, the detection of interrupt signal of microcontroller by exporting voltage comparator, record moment t1 that last medicine fall and the moment t2 that current medicine falls, calculate current fast N by formula (1):
N=60/ (t1-t2) drips/min (1)
Wherein, the unit of t1 and t2 is s;
F). dripping speed transfinites judgements, and by judging whether inequality (2) is set up, what judge current acquisition drips fast N whether within the alarm range of a reference fast M:
（1-x%）M ≤N≤（1+x%）M （2）
If set up, then show current speed within the range of permission; If be false, then surperficial current speed over range, sends sound and light alarm signal, adjusts to remind medical personnel; G). medicine stream sky judges, microcontroller is by the detection to the interrupt signal INT0 that voltage comparator exports, under judging whether medicine drippage all not detected in time period T, if under not having medicine to drip, then show that medicine has been injected complete, send sound and light alarm signal, carry out to remind medical personnel changing dressings or stopping injection treatment.
The method for supervising of Medical venous transfusion monitoring device of the present invention, step b) in, can circulate between clear liquid, Emulsion, thick liquid choose by pressing class of liquids selection key; Step c) in, dripping a fast alarm range setting button by pressing to press, can choose ± 10%, between ± fast an alarm range of 15% and ± 20%; Step g) middle time period T=n × (t1-t2), 2≤n≤10.
Wherein, Emulsion can be fat milk, and thick liquid can be mannitol.
The method for supervising of Medical venous transfusion monitoring device of the present invention, step e) in, by formula (3) obtain milliliter number/minute drip fast B:
B=v× 60/(t1-t2)ml/min (3)
Wherein, v is the volume of every drops physic liquor.
The invention has the beneficial effects as follows: medical vein injection infusion monitor of the present invention, by arranging in the periphery of dripping kettle at least two group infrared tubes be made up of infrared emission tube and infrared receiver tube, flase drop and undetected when efficiently avoid under medicine drippage, ensure that medicine drips the accuracy of counting.By using " be installed on drip infrared tube on kettle dripped output voltage when blocking by medicine and do not dripped 1/2nd of output voltage sum when blocking by medicine " as threshold voltage, when making to drip without medicine, other interfering signal can not cause error detection higher than threshold voltage, when having medicine to drip, the input voltage of infrared receiver tube side all the time higher than threshold voltage, can ensure that medicine drips the accuracy of detection.
The method for supervising of medical vein injection infusion monitor of the present invention, time difference time under being dripped by adjacent two medicines, what can calculate medicinal liquid efficiently and accurately drips speed, by current speed and reference are dripped comparing of speed, current speed can be judged whether within rational scope, if exceed set point, send sound and light alarm signal, adjust to remind medical personnel.If detected under dripping without medicine in certain hour section, then can judging that medicinal liquid flows sky, by sending sound and light alarm signal, realizing the prompting to medical personnel.Meanwhile, the current speed that also microcontroller can be recorded is set as, with reference to dripping speed, using convenient.
Medical vein injection infusion monitor of the present invention and method for supervising, organize infrared tube by arranging in the periphery of dripping kettle more, ensure that the accuracy dripping speed and detect, avoid the flase drop of infusion alarm in the past, undetected, by current fast calculating, whether value range and medicinal liquid flow sky can to judge current speed, but a speed is too fast or excessively slow, medicinal liquid stream can send sound and light alarm signal time empty, to remind medical and nursing work personnel to take corresponding measure, beneficial effect is remarkable, is convenient to application.
Accompanying drawing explanation
Fig. 1 is the setting principle figure of infrared tube in the present invention;
Fig. 2 is laying schematic diagram when adopting two groups of infrared tubes in the present invention;
Fig. 3 is the circuit theory diagrams of Medical venous transfusion monitoring device of the present invention;
Fig. 4 is the circuit diagram of testing circuit in the present invention;
Fig. 5 is the circuit diagram of microcontroller in the present invention;
Fig. 6 is the schematic diagram of control circuit and testing circuit interface in the present invention;
Fig. 7 is the circuit diagram of power module in the present invention;
Fig. 8 is the circuit diagram of key-press module in the present invention;
Fig. 9 is the interface principle figure of LCDs and microcontroller in the present invention;
Figure 10 is the circuit diagram of sound light alarming circuit in the present invention;
Figure 11 is Program Compile interface schematic diagram of the present invention;
Figure 12 is the working indicating of microcontroller in the present invention.
In figure: 1 tube for transfusion, 2 kettles, 3 infrared emission tubes, 4 infrared receiver tubes, 5 medicines drip, 6 microcontrollers, 7 power modules, 8 clock circuits, organize infrared tube 9 more, 10 voltage comparators, 11 class of liquids selection keys, 12 with reference to dripping speed setting button, 13 fast alarm range setting buttons, 14 LCDs, 15 speech chips, 16 speaker circuits, 17 photosignal warning circuits.
Detailed description of the invention
Below in conjunction with accompanying drawing and embodiment, the invention will be further described.
Medical venous transfusion monitoring device of the present invention is made up of testing circuit and control circuit, and whether testing circuit detects under having medicine to drip in a kettle, and is inputed in control circuit by detection signal.Control circuit calculates medicinal liquid drip speed according to the signal detected, and can judge whether medicinal liquid flows empty and current speed whether over range; Sound and light alarm signal can be sent when medicinal liquid stream is empty or drip fast over range, realize the prompting to medical personnel.
Testing circuit forms by organizing infrared tube more, and often organize infrared tube and be made up of infrared emission tube 3 and infrared receiver tube 4 again, infrared emission tube 3, infrared receiver tube 4 adopt infrared diode and infrared ray light sensitive diode respectively.As shown in Figure 1, give the setting principle figure of infrared tube in the present invention, many groups infrared tube is arranged at the periphery of dripping kettle 2 sustained height place, because medicinal liquid one, one enters to drip in kettle 2, therefore, infrared tube is arranged at and drips the periphery of kettle 2, by measuring infrared receiver tube 4 not dripped the change of blocking with the reception light dripped by medicine when blocking by medicine, can judge current whether have medicine to drip under.
As shown in Figure 2, give laying schematic diagram during employing two groups of infrared tubes, when employing two groups of infrared tubes, if the infrared emission tube 3 in one group of infrared tube and infrared receiver tube 4 lay respectively at the left and right sides of dripping kettle 2, then the infrared emission tube 3 in another group infrared tube and infrared receiver tube 4 lay respectively at the both sides up and down of dripping kettle 2.Like this, by the detection of two groups of infrared tubes, accurately can detect under whether having medicine to drip, can effectively avoid undetected, flase drop, ensure that the accuracy dripping speed and detect.
Be provided with voltage comparator 10 in testing circuit, the voltage of infrared receiver tube 4 side exports and is connected with the voltage input end mouth of voltage comparator 10, to realize and the comparing of voltage reference port upper threshold voltage on voltage comparator; On voltage comparator, the size of voltage reference port upper threshold voltage is: be installed on the infrared tube dripped on kettle and dripped output voltage when blocking by medicine and do not dripped 1/2nd of output voltage sum when blocking by medicine." infrared tube is dripped output voltage when blocking by medicine and do not dripped 1/2nd of output voltage sum when blocking by medicine " is as threshold voltage owing to adopting, when making to drip without medicine, other interfering signal can not cause error detection higher than threshold voltage, when having medicine to drip, the input voltage of infrared receiver tube side all the time higher than threshold voltage, can ensure that medicine drips the accuracy of detection.
As shown in Figure 3, give the circuit theory diagrams of Medical venous transfusion monitoring device of the present invention, shown control circuit is made up of microcontroller 6, power module 7, clock circuit 8, key-press module, LCDs 14, speech chip 15, speaker circuit 16 and photosignal warning circuit 17, microcontroller 6 has the effect that signals collecting, data operation and control export, the work that power module 7 is whole watch-dog provides stable voltage, and clock circuit 8 provides pulse signal for microcontroller 6.Key-press module by class of liquids selection key 11, with reference to dripping a speed setting button 12, drip a fast alarm range and set a button 13 and form, to choose class of liquids, setting respectively with reference to dripping speed, a setting alarm range.
Speech chip 15, speaker circuit 16 and photosignal warning circuit 17 constitute sound light alarming circuit jointly, microcontroller 6 is driven by speech chip 15 pairs of speaker circuits 16, to realize the warning of voice signal, photosignal warning circuit 17 is connected with the outfan of microcontroller 6, for realizing light alarm.Time difference between microcontroller 6 drips according to adjacent two medicines, obtain transfusion device current drip speed, and speed will be dripped by LCDs 14 and show; Compared with current speed is dripped speed with the reference of setting, can judge that with reference to a difference of speed whether within the specific limits current speed with, if exceed certain limit, then sends alarm signal; If under microcontroller 6 detects and do not have medicine to drip within the time period of setting, then show that dripping medicine terminates, and sends sound and light alarm signal, realizes the prompting to medical personnel.
As shown in Figure 4, give the circuit diagram of testing circuit in the present invention, shown infrared tube is by infrared light-emitting diode FS1, infrared ray light sensitive diode JS1, and infrared light-emitting diode FS2, infrared ray light sensitive diode JS2 two groups of being formed form pipe, voltage comparator 10 adopts two-way voltage compare chip LM393.Diode FS1, FS2, JS1, JS2 are positioned at the periphery of dripping kettle 2 sustained height, FS1, FS2 are connected to after connecting with resistance R101, R104 respectively between positive source VCC and power supply ground, and JS1, JS2 are connected between positive source and power supply ground after connecting with resistance R103, R110 respectively.The junction of light sensitive diode JS1 and resistance R103 is connected to the 1IN-port of the first via voltage compare of LM393, and the junction of JS2 and resistance R110 is connected to the 2IN-port of the second road voltage compare of LM393.
The 1IN+ port of first via voltage compare is connected with ground, to form the threshold voltage of first via voltage compare with positive source through resistance R113, R114 respectively.The 2IN+ port of the second road voltage compare is connected with ground with positive source through resistance R124, R123 respectively, defines the threshold voltage of the second road voltage compare.When threshold voltage is chosen using " dripped output voltage when blocking to pipe by medicine outward and do not dripped 1/2nd of output voltage sum when blocking as threshold voltage by medicine " for principle, pass through Practical Calculation, threshold voltage is chosen in the scope of 2.4 ~ 2.6V, the substitutional resistance of two 10K Ω is adopted to carry out dividing potential drop to the voltage of 5.0V in the present embodiment, the threshold voltage obtained is 2.5V, the accuracy detected when ensure that under medicine drippage.
The first via of voltage compare chip LM393 exports 1OUT and the second tunnel output 2OUT all forms interrupt signal INT0, and the interrupt signal INT0 of shown formation is all connected with the input of microcontroller 6.Because two groups of infrared tubes are arranged at the sustained height dripping kettle 2, therefore can detect under whether having medicine to drip in the same time, the waveform of the interrupt signal that outfan 1OUT and 2OUT is exported is almost completely the same, while ensure that detection accuracy, there will not be error detection.
As shown in Figure 5, give the circuit diagram of microcontroller in the present invention, shown microcontroller 6 adopts single chip computer AT MEGA8A-TQFP, and the interrupt signal INT0 that its PD2 port and LM393 export is connected, to realize the detection to the lower signal of medicine drippage.As shown in Figure 6, give the schematic diagram of control circuit and testing circuit interface in invention, in shown microcontroller 6 and the interface of testing circuit, comprise positive source VCC, interrupt signal INT0, power supply ground GND.
As shown in Figure 7, give the circuit diagram of power module in the present invention, shown P3 is rechargeable battery interface, realizes the connection with rechargeable battery; Power management chip adopts the power input VDD of HT7033, chip HT7033 to be connected with positive source VCC through resistance R7, to realize the intelligent management to rechargeable battery.Charging management chip adopts cn3062, charging inlet adopts microUSB, the VIN port of chip cn3062 is connected with the VIN port on charging inlet, to provide voltage by microUSB interface to chip cn3062, charges under the management of chip cn3062 to rechargeable battery.Wherein microUSB is also provided with INT0 pin, can make realization charge and be connected with testing circuit carry out multiplexing.
As shown in Figure 8, give the circuit diagram of key-press module in invention, wherein button S1, S2, S3 is connected to after connecting with resistance R11, R12, R13 respectively between positive source VCC and power supply ground GND, and is connected with the respective input mouth of microcontroller 6 respectively.Button S1, S2, S3 be respectively class of liquids selection key 11, with reference to dripping a speed setting button 12, dripping fast alarm range setting button 13, can circulate choose by pressing class of liquids selection key 11 between clear liquid, opaque emulsions, mannitol class of liquids; By pressing with reference to dripping speed setting button 12, the current speed that microcontroller 6 can be detected is set as with reference to dripping speed; Dripping a fast alarm range setting button 13 by pressing to press, can choose ± 10%, between ± fast an alarm range of 15% and ± 20%.Wherein, when being chosen for clear liquid, letter " Q " can being shown in LCDs 14, when being chosen for opaque emulsions, letter " R " can be shown in LCDs 14, indicate to carry out difference.
As shown in Figure 9, give the interface principle figure of LCDs and microcontroller in invention, microcontroller 6 is connected with LCDs 14 by 16 needle sockets, carries out dripping the information such as fast and class of liquids that is that choose show to drive LCDs 14.As shown in Figure 10, give the circuit diagram of sound light alarming circuit in the present invention, the control end TG1 port of shown Voice command chip U2 is connected with the PD1 port of microcontroller 6, and the speech output end PWM2 of Voice command chip U2 is connected with the circuit at speaker place, to realize audio alert.Shown light alarm circuit 17 is made up of light emitting diode D1, D1 is connected between positive source VCC and power supply ground GND after connecting with audion Q3 and resistance R3, the base stage of audion Q3 forms light alarm control end LED through resistance R5, is connected with the PC3 port of microcontroller 6.
As shown in figure 11, give Program Compile interface schematic diagram of the present invention, by program compilation interface, the download program that microcontroller 6 can be run is in microcontroller 6 or corresponding memorizer.As shown in figure 12, give the working indicating of microcontroller in the present invention, it is connected to after being connected with resistance R00 by light emitting diode D0 on power supply ground GND and is formed, and its control end L0 is connected with the PD4 port of microcontroller 6, realizes indicating the work of microcontroller 6.
The method for supervising of Medical venous transfusion monitoring device of the present invention, is realized by following steps:
A). equipment connection, is arranged at the dripping kettle on of transfusion device by by organizing the testing circuit that infrared tube forms more, and is connected with control circuit by testing circuit;
B). class of liquids is selected, and after open control circuit, choose corresponding class of liquids by class of liquids selection key, different class of liquids has different droplet sizes;
In this step, can circulate between clear liquid, opaque emulsions, mannitol class of liquids choose by pressing class of liquids selection key (11);
C). drip the setting of a fast alarm range, drip a fast alarm range setting button by pressing, fast over range warning numerical value is dripped in setting, if set warning numerical value be ± x%, when detect drip speed exceed with reference to drip fast ± x% time, then send alarm signal;
In this step, dripping fast alarm range setting button (13) by pressing to press, can choose ± 10%, between ± fast an alarm range of 15% and ± 20%;
D). with reference to the setting of dripping speed, medical personnel open transfusion device, according to the injection requirement of current injectable drug, while observing LCDs shown speed, current speed is made to reach desirable value by the speed regulator on transfusion device, and press with reference to dripping speed setting button, current speed is set as with reference to dripping speed, if be M with reference to dripping speed;
E). current fast acquisition, the detection of interrupt signal of microcontroller by exporting voltage comparator, record moment t1 that last medicine fall and the moment t2 that current medicine falls, calculate current fast N by formula (1):
N=60/ (t1-t2) drips/min (1)
Wherein, the unit of t1 and t2 is s;
In this step, by formula (3) obtain milliliter number/minute drip fast B
B=v× 60/(t1-t2)ml/min (3)
Wherein, v is the volume of every drops physic liquor.
F). dripping speed transfinites judgements, and by judging whether inequality (2) is set up, what judge current acquisition drips fast N whether within the alarm range of a reference fast M:
N≤（1±x%）M （2）
If set up, then show current speed within the range of permission; If be false, then surperficial current speed over range, sends sound and light alarm signal, adjusts to remind medical personnel;
G). medicine stream sky judges, microcontroller is by the detection to the interrupt signal INT0 that voltage comparator exports, under judging whether medicine drippage all not detected in time period T, if under not having medicine to drip, then show that medicine has been injected complete, send sound and light alarm signal, carry out to remind medical personnel changing dressings or stopping injection treatment.
In this step, time period T can be chosen for: T=n × (t1-t2), 2≤n≤10.
Claims (9)
1. a Medical venous transfusion monitoring device, comprise for measuring the testing circuit that whether has medicine to drip and testing circuit being exported to the control circuit processed, described testing circuit is made up of infrared tube and voltage comparator (10); It is characterized in that: described infrared tube is two groups or more, often organize infrared tube and be all arranged at the sustained height position of dripping kettle (2); Often organize infrared tube by laying respectively at the infrared emission tube (3) and infrared receiver tube (4) composition that drip kettle both sides; The output of infrared receiver tube side is connected with the voltage input end mouth of voltage comparator (10), to realize and the comparing of voltage reference port upper threshold voltage on voltage comparator;
On voltage comparator, the size of voltage reference port upper threshold voltage is: be installed on the infrared tube dripped on kettle and dripped output voltage when blocking by medicine and do not dripped 1/2nd of output voltage sum when blocking by medicine.
2. Medical venous transfusion monitoring device according to claim 1, it is characterized in that: the number of described infrared tube is two groups, infrared emission tube (3) in one group of infrared tube and infrared receiver tube (4) horizontally-opposed in drip kettle (2) both sides, another group infrared tube then with first group of infrared tube with criss-cross fashion be opposite to drip kettle both sides.
3. Medical venous transfusion monitoring device according to claim 1 and 2, it is characterized in that: described voltage comparator (10) is two-way voltage compare chip LM393, often the infrared emission tube (3) organized in infrared tube is connected between positive source and ground after connecting with current-limiting resistance, and infrared receiver tube is connected between positive source and ground after connecting with current-limiting resistance; Infrared receiver tube in two groups of infrared tubes is connected with the different voltage input end mouths of LM393 from the junction of current-limiting resistance, the Voltage Reference port of LM393 is connected with ground with positive source respectively through different divider resistances, the two-way output port of LM393 forms interrupt signal INTO, and interrupt signal INTO is connected with control circuit.
4. Medical venous transfusion monitoring device according to claim 3, it is characterized in that: described control circuit is made up of microcontroller (6) and coupled power module (7), clock circuit (8), key-press module, LCDs and sound light alarming circuit, and the interrupt signal INT0 that voltage comparator (10) exports is connected with the input of microcontroller; Key-press module comprises class of liquids selection key (11), with reference to dripping speed setting button (12) and dripping fast alarm range setting button (13);
Time difference between microcontroller drips according to adjacent two medicines, obtain transfusion device current drip speed, if drip speed to drip/min for N, and speed will be dripped by LCDs and show; Microcontroller by the current fast N that will obtain with reference to dripping compared with speed, can judge current speed with reference to whether within the specific limits dripping fast difference, if exceed certain limit, then send alarm signal; If under microcontroller detects and do not have medicine to drip within the time period of setting, then show that dripping medicine terminates, and sends sound and light alarm signal.
5. Medical venous transfusion monitoring device according to claim 4, it is characterized in that: described sound light alarming circuit is made up of voice alarm circuit and light alarm circuit (17), voice alarm circuit is made up of speech chip (15) and speaker circuit (16), the control end of speech chip is connected with the outfan of microprocessor (6), and the outfan of speech chip is connected with speaker circuit; The control end of sound light alarming circuit is connected with the outfan of microcontroller.
6. the Medical venous transfusion monitoring device according to claim 4 or 5, is characterized in that: described power module (7) is made up of rechargeable battery, charging management chip cn3062, power management chip HT7033 and charging inlet; The input of charging management chip cn3062 is connected with charging inlet, and outfan is connected with rechargeable battery; The detection port of power management chip HT7033 is connected with the positive pole of rechargeable battery.
7. based on a method for supervising for Medical venous transfusion monitoring device according to claim 1, it is characterized in that, realized by following steps:
A). equipment connection, is arranged at the dripping kettle on of transfusion device by by organizing the testing circuit that infrared tube forms more, and is connected with control circuit by testing circuit;
B). class of liquids is selected, and after open control circuit, choose corresponding class of liquids by class of liquids selection key, different class of liquids has different droplet sizes;
C). drip the setting of a fast alarm range, drip a fast alarm range setting button by pressing, fast over range warning numerical value is dripped in setting, if set warning numerical value be ± x%, when detect drip speed exceed with reference to drip fast ± x% time, then send alarm signal;
D). with reference to the setting of dripping speed, medical personnel open transfusion device, according to the injection requirement of current injectable drug, while observing LCDs shown speed, current speed is made to reach desirable value by the speed regulator on transfusion device, and press with reference to dripping speed setting button, current speed is set as with reference to dripping speed, if be M with reference to dripping speed;
E). current fast acquisition, the detection of interrupt signal of microcontroller by exporting voltage comparator, record moment t1 that last medicine fall and the moment t2 that current medicine falls, calculate current fast N by formula (1):
N=60/ (t1-t2) drips/min (1)
Wherein, the unit of t1 and t2 is s;
F). dripping speed transfinites judgements, and by judging whether inequality (2) is set up, what judge current acquisition drips fast N whether within the alarm range of a reference fast M:
（1-x%）M ≤N≤（1+x%）M （2）
If set up, then show current speed within the range of permission; If be false, then surperficial current speed over range, sends sound and light alarm signal, adjusts to remind medical personnel;
G). medicine stream sky judges, microcontroller is by the detection to the interrupt signal INT0 that voltage comparator exports, under judging whether medicine drippage all not detected in time period T, if under not having medicine to drip, then show that medicine has been injected complete, send sound and light alarm signal, carry out to remind medical personnel changing dressings or stopping injection treatment.
8. the method for supervising of Medical venous transfusion monitoring device according to claim 7, is characterized in that: step b) in, can circulate between clear liquid, Emulsion, thick liquid choose by pressing class of liquids selection key (11); Step c) in, dripping fast alarm range setting button (13) by pressing to press, can choose ± 10%, between ± fast an alarm range of 15% and ± 20%; Step g) middle time period T=n × (t1-t2), 2≤n≤10.
9. the method for supervising of Medical venous transfusion monitoring device according to claim 7, is characterized in that: step e) in, by formula (3) obtain milliliter number/minute drip fast B:
B=v× 60/(t1-t2)ml/min (3)
Wherein, v is the volume of every drops physic liquor.
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| CN105413012A (en) * | 2015-12-23 | 2016-03-23 | 桂林电子科技大学信息科技学院 | Portable intelligent infusion system |
| CN106039471A (en) * | 2016-06-16 | 2016-10-26 | 秦爱玉 | Accurate and quantitative infusion device |
| CN106039470A (en) * | 2016-06-16 | 2016-10-26 | 秦爱玉 | System realizing adjustment on drip velocity of oxytocin according to maternal uterine contraction |
| CN106215282A (en) * | 2016-08-31 | 2016-12-14 | 吴波 | Based on infrared drop detection and the monitoring infusion method and system of detection of weighing |
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| CN105413012A (en) * | 2015-12-23 | 2016-03-23 | 桂林电子科技大学信息科技学院 | Portable intelligent infusion system |
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| CN107715236A (en) * | 2017-10-23 | 2018-02-23 | 佛山科学技术学院 | A kind of intelligent transfusion supervisory circuit |
| CN109821110A (en) * | 2019-02-25 | 2019-05-31 | 英华达（上海）科技有限公司 | A kind of Intelligent drip fluid controller and control method |
| CN109966586A (en) * | 2019-05-14 | 2019-07-05 | 上海市肺科医院 | A kind of infrared intravenous infusion gauge |
| CN110444970A (en) * | 2019-07-08 | 2019-11-12 | 杭州电子科技大学 | A kind of domestic intelligent principal and subordinate linkage socket controlling system |
| CN110368552A (en) * | 2019-07-24 | 2019-10-25 | 江苏开放大学（江苏城市职业学院） | One kind remotely combining unattended medical infusion monitoring system |
| CN110624156A (en) * | 2019-10-18 | 2019-12-31 | 张伟 | Infusion support control circuit for obstetrics and gynecology department |
| CN111228608A (en) * | 2020-01-09 | 2020-06-05 | 吉林省挺好滴信息技术有限责任公司 | Infrared reflection type liquid dripping speed detector |
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