CN102813975A - Method for monitoring transfusion based on effect of sudden change of dropping speed of needle head - Google Patents
Method for monitoring transfusion based on effect of sudden change of dropping speed of needle head Download PDFInfo
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- CN102813975A CN102813975A CN2012103416109A CN201210341610A CN102813975A CN 102813975 A CN102813975 A CN 102813975A CN 2012103416109 A CN2012103416109 A CN 2012103416109A CN 201210341610 A CN201210341610 A CN 201210341610A CN 102813975 A CN102813975 A CN 102813975A
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Abstract
The invention provides a method for monitoring transfusion based on the effect of the sudden change of the dropping speed of a needle head. An infrared sensor is adopted to measure the dropping speed of traditional Chinese medicine liquid in a transfusion dropper; a gravity sensor or the infrared sensor is adopted to judge the residual liquid quantity in a transfusion container; when the liquid level of the medicine liquid approaches the bottom of the transfusion container, the change of the dropping speed of the medicine liquid along with time is closely observed; when the liquid level of the transfusion liquid approaches or is lower than the transfusion needle head, the dropping speed decreases suddenly, which means the effect of the sudden change of the dropping speed of the needle head takes place, and then the transfusion is judged to be finished; and a system sends out an alarm that the transfusion is finished at once. The method can be solely used as a transfusion alarm and can also be used as the alarm method in a transfusion monitoring system. For example, the method can be used for alarming when the transfusion is finished in a transfusion monitoring system with the combination of gravity-infrared sensors.
Description
Technical field
The present invention relates to a kind of infusion monitoring method, especially a kind of based on syringe needle drip fast mutation effect transfusion finish decision method.
Background technology
In the hospital two types of transfusion systems are arranged at present.A kind of is infusion pump, and another kind is to use gravity.The pump transfusion system is very expensive, and safeguards complicated.Another kind is traditional gravity transfusion system, and its low price is easy to use.So many medical personnel select to use traditional gravity transfusion system.The gravity transfusion system is made up of following three parts: 1: infusion vessel, 2: tube for transfusion, one of tube for transfusion is connected with infusion vessel through transfusion needle, is used for accepting medical use liquid.Receive the transfusion of intravenous needle insertion venous patient for other one of tube for transfusion.On tube for transfusion, adorn a flow switch, manually control infusion flow rate, tube for transfusion also contains transfusion drip tube and is used to observe transfusion drip speed; 3: air inlet pipe, one of air inlet pipe is inserted infusion vessel, and other one is exposed in air, makes to keep air pressure in the infusion vessel, guarantees medicinal liquid under certain pressure, relies on gravity to flow in the venous patient smoothly.
In order to make infusion process safety smooth, patient and nurse need constantly keep watch on infusion vessel inner liquid medicine situation of change, observe its transfusion liquid measure, liquid speed, transfusion time and residue medicinal liquid etc.This becomes medical personnel's bears greatly, presses for an infusion monitoring and warning system for this reason.
Society is upward a lot of about venous transfusion warning system patent at present, but does not all have really should use, and main cause is a poor reliability, uses troublesome poeration, increases medical personnel's workload, and unreliable.
Summary of the invention
The objective of the invention is to overcome the deficiency that exists in the prior art, provide a kind of and new drip the infusion monitoring method of fast mutation effect, can be used for transfusion and finish to report to the police based on syringe needle, can be as an important component part of infusion monitoring system.It is that applicant of the present invention at first finds in experiment that said syringe needle drips fast mutation effect, and has proposed corresponding theory and prove.
According to technical scheme provided by the invention, said infusion monitoring method of dripping fast mutation effect based on syringe needle is: adopt infrared sensor to measure transfusion drip tube Chinese medicine drop speed, dripping speed when reducing suddenly, being judged as transfusion and finishing; Said speed reduction suddenly is meant: instantaneous prompt drop low value is more than or equal to the marginal value of setting.
Infrared sensor records t blanking time of two drops physic liquors, and said instantaneous speed is defined as its 1/t reciprocal, and unit drips/minute.
Be to guarantee the accuracy of monitoring, use gravity sensor to judge in the infusion vessel and remain liquid measure that near the infusion vessel bottom, promptly said residue liquid measure is observed medicine liquid droplet speed over time during less than setting value at the medicinal liquid liquid level.Also can calculate in the infusion vessel according to the medicine liquid droplet speed that transfusion initial liquid measure and infrared sensor record and remain liquid measure, near the infusion vessel bottom, promptly said residue liquid measure is during less than setting value at the medicinal liquid liquid level, and observation medicine liquid droplet speed over time.
The residue liquid measure adopts residue medicinal liquid weight W r to weigh, and residue medicinal liquid weight W r is defined as initial medicinal liquid weight and reduces the poor of medicinal liquid weight; When satisfying one of following condition, think that the medicinal liquid liquid level is near infusion vessel bottom: a, Wr are less than first setting value, and the empty infusion vessel weight that b, gross weight are reduced to setting adds second setting value.
Infusion vessel hangs over the gravity sensor below, and the weight signal that gravity sensor is measured is sent to monitor analysis, and monitor calculates transfusion speed, transfusion liquid measure and transfusion time.
Said infrared sensor is installed in the transfusion drip tube outside, and the time signal that records is sent to monitor analysis, obtains medicine liquid droplet speed.
Said monitor comprises alarm device and display screen, and contains antenna and be used for carrying out wireless telecommunications with hospital network system and nurse center.
Advantage of the present invention is: drip the infusion monitoring method of fast mutation effect based on syringe needle, its precision is high, and good reliability is easy to use, can be as an important component part of infusion monitoring system, really solve nurse and the patient inconvenience when transfusion is hung droplet.
Description of drawings
Fig. 1 is relevant a transfusion system and relevant monitoring device of the said method of embodiment of the present invention.
Fig. 2 is the infusion vessel sketch map.
Fig. 3 is for dripping fast time dependent sketch map.
Fig. 4 is for dripping fast time dependent experimental data figure.
Fig. 5 is for dripping the transfusion alarm flow figure that fast mutation effect is implemented based on syringe needle.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is described further.
As shown in Figure 1 is relevant transfusion system and relevant monitoring device of the said method of embodiment of the present invention.Said transfusion system is made up of infusion vessel 1 (hang drop bottle or hang and drip bag), transfusion needle 2, air inlet needle 3, tube for transfusion 4, air inlet pipe 5.Transfusion needle 2 inserts infusion vessel 1 bottom with air inlet needle 3; Tube for transfusion 4 is connected with transfusion needle 2, air inlet needle 3 respectively with air inlet pipe 5; Air inlet pipe 5 other one expose in air; Make to keep air pressure in the infusion vessel 1, receive the transfusion of intravenous needle insertion venous patient for other one of tube for transfusion 4, infusion vessel 1 inner liquid medicine 6 relies on gravity to flow in the venous patient.Tube for transfusion 4 comprises transfusion drip tube 7 and transfuse switch 8, and transfusion drip tube 7 is used to observe transfusion drip speed, and transfuse switch 8 is used to adjust transfusion speed.Relevant monitoring device is by gravity sensor 10, and infrared sensor 11 is formed with monitor 12.Infusion vessel 1 hangs over gravity sensor 10 belows, and gravity sensor 10 is measured transfusion weight, and institute's check weighing amount signal is sent to monitor 12 and analyzes, and obtains parameters such as transfusion speed, transfusion liquid measure and transfusion time.Infrared sensor 11 is installed in transfusion drip tube 7 outsides, and the time signal that infrared sensor 11 is surveyed is sent to monitor 12 and analyzes, and obtains accurate transfusion speed.The residue liquid measure can be judged by gravity sensor 10 in the infusion vessel 1, or estimates based on the transfusion speed that infuse initial liquid measure and infrared sensor 11 record.Monitor 12 contains display 9, is used to show infusion parameter and warning.Monitor 12 also contains antenna and is used for carrying out wireless telecommunications with hospital network system and nurse center 13.
Infrared sensor records t blanking time of two drops physic liquors, instantaneous fast v
t(droplet/minute) then is defined as its v reciprocal
T=1/t.In when, syringe needle taking place dripping fast mutation effect, the instantaneous low Δ v of prompt drop
tBe not less than the setting marginal value, marginal value can adopt the setting constant, like Δ v
t>=3 droplets/minute, or marginal value adopts instantaneous minimum instantaneous fast v in the speed sudden change for the previous period
TaSetting percentage ratio (like Δ v
t>=10% * v
Ta) etc.
According to fluid mechanics principle,
wherein liquid level h is the vertical height of liquid in above tube for transfusion of transfusion drip tube and the infusion vessel; Liquid speed v, Δ p is the pressure difference of fluid column two ends in the tube for transfusion, ρ medicinal liquid density, g acceleration of gravity.Below the transfusion liquid level dropped to transfusion needle, Δ p diminished suddenly, and liquid speed v can reduce suddenly, and Here it is, and infusion needle drips fast mutation effect.
In the normal infusion process, air inlet needle can import air, and the air that the bubble that air forms can increase in the infusion vessel is pressed, and is directed at transfusion drip speed and rises suddenly, descends suddenly again, thereby disturbs the observation of syringe needle being dripped the speed sudden change.For preventing owing to infusion process is longer; Artificial governing speed in the transfusion; Or pressure change to produce velocity jump and causes false alarm in the container, and we can estimate the height of transfusion liquid level with gravity sensor or infrared sensor, when transfusion liquid level during near the infusion vessel bottom; Just begin to observe and drip speed, and when the generation syringe needle drips the speed sudden change, send transfusion at once and finish alarm signal.Judge whether the transfusion liquid level can refer to remain weight, the volume of medicinal liquid through the residue liquid measure near the infusion vessel bottom, owing to only relate to density conversion, therefore essence is the same.Below be example with weight.
In clinical manipulation, residue medicinal liquid weight W r can estimate that the also available weight difference that contains liquid bottle and empty bottle is estimated with the difference of initial medicinal liquid weight and medicinal liquid weight reduction.Medicinal liquid weight reduction can record with gravity sensor, and initial medicinal liquid weight can be judged or artificial input by monitor.As: when Wr less than setting value (as Wr 10 grams) time, we regard as the transfusion liquid level near infusion vessel bottom.In other words: when satisfying one of following condition, think that the medicinal liquid liquid level is near infusion vessel bottom: a, Wr are less than first setting value, and the empty infusion vessel weight that b, gross weight are reduced to setting adds second setting value.
As shown in Figure 2, it is following that syringe needle drips the rationale discussion of fast mutation effect.
Exert sharp equation according to one hundred, can get
Wherein: ρ medicinal liquid density, g acceleration of gravity, the vertical height of transfusion liquid in tube for transfusion that the h transfusion drip tube is above and the infusion vessel; The Ao medicinal liquid is at the sectional area on infusion vessel top; The sectional area of A medicinal liquid in tube for transfusion, vo liquid level are in the decrease speed at sectional area Ao place, and the v liquid level is in the decrease speed at sectional area A place, and Δ p is a transfusion liquid pressure difference up and down.
According to the incompressible fluid principle of continuity, can get A again
ov
o=Av.
Can obtain in conjunction with above two equations:
Following formula can be exchanged into and contains mass velocity v
m(kg/s) equation:
The nurse can regulate and control the injection quality speed v by staff adjustment Δ p
m, transfusion speed promptly mentioned above.
In the normal infusion situation:
Can obtain:
When the medicinal liquid liquid level drops to transfusing container port neck place, sectional area diminishes and is A, v
mDiminish.
The more important thing is that below the transfusion liquid level dropped to transfusion needle, Δ p also diminished suddenly, liquid speed v
mCan reduce suddenly, Here it is, and infusion needle drips fast mutation effect.
Fig. 3 is for dripping fast time dependent sketch map, and being presented at syringe needle drips fast sudden change place, drips speed and diminishes suddenly.
Fig. 4 is for dripping fast time dependent experimental data figure, and being presented at syringe needle drips fast sudden change place, drips speed and diminishes suddenly.
Fig. 5 is for dripping the transfusion alarm flow figure of fast mutation effect one embodiment based on syringe needle.May further comprise the steps: adopt infrared sensor to measure transfusion drip tube Chinese medicine drop speed 20; Use gravity sensor to judge residue liquid measure 21 in the infusion vessel; Near infusion vessel when bottom, close observation medicine liquid droplet speed over time 22 is being dripped speed when reducing suddenly at the medicinal liquid liquid level; When syringe needle promptly taking place dripping fast mutation effect, sending transfusion and finishing alarm 23.
The method can be used as infusion alarm separately, and the alarm method that also can be used as in the infusion monitoring system uses.Such as, a kind of gravity-infrared sensor combination type infusion monitoring system, but adopting said method finishes to report to the police in transfusion.
Claims (9)
1. drip the infusion monitoring method of fast mutation effect based on syringe needle, it is characterized in that: adopt infrared sensor to measure transfusion drip tube Chinese medicine drop speed, when a speed reduces suddenly, be judged as the transfusion end; Said speed reduction suddenly is meant: instantaneous prompt drop low value is more than or equal to the marginal value of setting.
2. drip the infusion monitoring method of fast mutation effect according to claim 1 based on syringe needle, it is characterized in that infrared sensor records t blanking time of two drops physic liquors, said instantaneous speed is defined as its 1/t reciprocal, and unit drips/minute.
3. drip the infusion monitoring method of fast mutation effect according to claim 1 based on syringe needle; It is characterized in that, use gravity sensor to judge in the infusion vessel and remain liquid measure, at the medicinal liquid liquid level near the infusion vessel bottom; Be said residue liquid measure during, observe medicine liquid droplet speed over time less than setting value.
4. drip the infusion monitoring method of fast mutation effect according to claim 1 based on syringe needle; It is characterized in that; The fast calculating in the infusion vessel of medicine liquid droplet that records according to infuse initial liquid measure and infrared sensor remains liquid measure; Near infusion vessel bottom, promptly said residue liquid measure is observed medicine liquid droplet speed over time during less than setting value at the medicinal liquid liquid level.
5. like claim 3,4 saidly drip the infusion monitoring method of fast mutation effect based on syringe needle, it is characterized in that the residue liquid measure adopts residue medicinal liquid weight W r to weigh, and residue medicinal liquid weight W r is defined as initial medicinal liquid weight and reduces the poor of medicinal liquid weight; When satisfying one of following condition, think that the medicinal liquid liquid level is near infusion vessel bottom: a, Wr are less than first setting value, and the empty infusion vessel weight that b, gross weight are reduced to setting adds second setting value.
6. like the said infusion monitoring method of dripping fast mutation effect based on syringe needle of claim 3; It is characterized in that infusion vessel hangs over the gravity sensor below, the weight signal that gravity sensor is measured is sent to monitor analysis; Monitor calculates transfusion speed, transfusion liquid measure and transfusion time.
7. drip the infusion monitoring method of fast mutation effect according to claim 1 based on syringe needle, it is characterized in that, said infrared sensor is installed in the transfusion drip tube outside, and the time signal that records is sent to monitor analysis, obtains medicine liquid droplet speed.
8. drip the infusion monitoring method of fast mutation effect as claim 7 is said based on syringe needle, it is characterized in that said monitor comprises alarm device and display screen.
9. drip the infusion monitoring method of fast mutation effect as claim 7 is said based on syringe needle, it is characterized in that said monitor contains antenna and is used for carrying out wireless telecommunications with hospital network system and nurse center.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104958808A (en) * | 2015-05-27 | 2015-10-07 | 苏州合欣美电子科技有限公司 | Infusion monitoring system based on photoelectric sensor |
| US9199036B2 (en) | 2013-02-25 | 2015-12-01 | Shift Labs, Inc. | Device, method, and system for monitoring the delivery of fluids through a drip chamber |
| CN107663748A (en) * | 2016-07-29 | 2018-02-06 | 无锡小天鹅股份有限公司 | Washing machine |
| 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 |
| CN110604849A (en) * | 2019-10-12 | 2019-12-24 | 中国人民解放军陆军军医大学第二附属医院 | Intelligent infusion device for hematology department |
| US11464905B2 (en) | 2013-02-25 | 2022-10-11 | Shift Labs, Inc. | Monitoring device including an emitter emitting electromagnetic radiation and a detector positioned to receive the radiation to determine one or more rolling average flow rates |
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| CN101130117A (en) * | 2006-08-24 | 2008-02-27 | 缪学明 | Portable monitoring device for hanging drop of vein |
| CN102028990A (en) * | 2010-02-22 | 2011-04-27 | 缪学明 | Transfusion monitoring method |
| CN202342593U (en) * | 2011-11-25 | 2012-07-25 | 黄徳裕 | Intelligent infusion monitoring device |
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2012
- 2012-09-14 CN CN2012103416109A patent/CN102813975A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101130117A (en) * | 2006-08-24 | 2008-02-27 | 缪学明 | Portable monitoring device for hanging drop of vein |
| CN102028990A (en) * | 2010-02-22 | 2011-04-27 | 缪学明 | Transfusion monitoring method |
| CN202342593U (en) * | 2011-11-25 | 2012-07-25 | 黄徳裕 | Intelligent infusion monitoring device |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9199036B2 (en) | 2013-02-25 | 2015-12-01 | Shift Labs, Inc. | Device, method, and system for monitoring the delivery of fluids through a drip chamber |
| US11464905B2 (en) | 2013-02-25 | 2022-10-11 | Shift Labs, Inc. | Monitoring device including an emitter emitting electromagnetic radiation and a detector positioned to receive the radiation to determine one or more rolling average flow rates |
| CN104958808A (en) * | 2015-05-27 | 2015-10-07 | 苏州合欣美电子科技有限公司 | Infusion monitoring system based on photoelectric sensor |
| CN107663748A (en) * | 2016-07-29 | 2018-02-06 | 无锡小天鹅股份有限公司 | Washing machine |
| CN107663748B (en) * | 2016-07-29 | 2023-09-22 | 无锡小天鹅电器有限公司 | Washing machine |
| 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 |
| CN110604849A (en) * | 2019-10-12 | 2019-12-24 | 中国人民解放军陆军军医大学第二附属医院 | Intelligent infusion device for hematology department |
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Application publication date: 20121212 |