CN104056322A - Transfusion peristaltic pump and fluctuation compensation and blood backflow control method thereof - Google Patents
Transfusion peristaltic pump and fluctuation compensation and blood backflow control method thereof Download PDFInfo
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- CN104056322A CN104056322A CN201410220196.5A CN201410220196A CN104056322A CN 104056322 A CN104056322 A CN 104056322A CN 201410220196 A CN201410220196 A CN 201410220196A CN 104056322 A CN104056322 A CN 104056322A
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Abstract
The invention discloses a transfusion peristaltic pump and a fluctuation compensation and blood backflow control method thereof. The peristaltic pump mainly adopts the scheme that a compensation peristaltic mechanism is arranged at the lower portion of a plurality of peristaltic finger-like components in the conventional structure, and comprises a compensation peristaltic finger-like component, a bearing, a bearing fixing shaft, a compensation cam, and pressing springs, wherein the bearing is connected with the compensation peristaltic finger-like component through the bearing fixing shaft; the bearing can rotate around the bearing fixing shaft; the pressing springs enable the bearing and the compensation cam to be in contact all the time; the compensation cam is fixedly connected with a shared shaft. The fluctuation compensation and blood backflow control method of the transfusion peristaltic pump comprises the following steps: controlling the peristaltic finger-like components to drive the liquid medicine inside a transfusion pipe to flow, controlling the compensation cam to control the compensation peristaltic finger-like components to extrude the transfusion pipe through the cam curve of the compensation cam when the instant flow speed of liquid medicine is lower, and controlling the compensation cam to control the compensation peristaltic finger-like components to return through the cam curve of the compensation cam when the instant flow speed of liquid medicine is higher. According to the invention, the problems of the transfusion cyclical fluctuation and the blood backflow are solved.
Description
Technical field
The present invention relates to medical apparatus and instruments and corresponding control methods, be specifically related to a kind of transfusion peristaltic pump and oscillation compensation thereof, blood backflow control method.
Background technology
The existing peristaltic pump for medical domain transfusion use, common structure form as shown in Figure 1.In peristaltic pump, be distributed with 12 wrigglings and refer to 4, wriggle and refer to that 4 push tube for transfusion 7 in a looping fashion, tube for transfusion 7 is resisted against on pressure pipe piece 6, and pressure pipe piece 6 back sides are provided with spring 5.Each wriggling refers to that 4 is vertical mobile respectively, and multiple wrigglings refer to cyclically move with waveform, are from upstream to thereby form the closed area that move in downstream; In the time that first wriggling of upstream refers to bear against on pressure pipe piece 6, last wriggling in downstream refers to lift, second wriggling of then upstream refers to bear against on pressure pipe piece 6, and 12 wrigglings refer to 4 circulation propellings successively, thereby complete the object that medicinal liquid is carried toward downstream from upstream.12 wrigglings refer to that 4 action is because 12 cams 3 of its correspondence are controlled, each cam and a wriggling assignment are closed, these cams are disposed on a common axis 9 in a spiral manner, common axis 9 is connected with pedestal 2 by bearing 1, on common axis 9, dispose a synchronous pulley 8 simultaneously, drive synchronous pulley 8 to drive common axis 9 to rotatablely move by motor (not shown).
The major defect of above-mentioned peristaltic pump is:
There is intrinsic cyclic fluctuation (referring to Fig. 4) in the liquid stream 1, being pumped, causes number of infusion drops or infusion flow rate and perfect condition inconsistent, and infusion of drug speed can not be flow in patient body equably; Especially, for shorter medicine of half-life, this intrinsic undulatory property to patient be have nocuous.
There is blood backflow phenomenon (referring to Fig. 4) in each cycle initial time section in the liquid stream 2, being pumped, show as the moment that each cycle period starts, wriggling and refer to back out in downstream, causes that medicinal liquid is sucked towards upstream portion from the downstream part near patient's side, and wriggle and refer to advance in upstream, this causes pumping, but in a brief moment, described suction is greater than pumping, this phenomenon produces syringe needle blood back, easily stop up syringe needle, cause malpractice.
For transfusion cyclic fluctuation problem, Chinese patent application CN102764463A carries out oscillation compensation by the method for conversion motor speed, but it is limited that this technical scheme suppresses transfusion cyclic fluctuation effect, because transfusion instantaneous velocity is not only relevant with motor speed, also wriggle and refer to be correlated with extruding, the simple method that relies on conversion motor speed is difficult to the effect that reaches satisfied; In addition, this technical scheme need to be carried out complicated special control to motor, has increased control difficulty.
For blood backflow phenomenon, Chinese patent CN101529093B avoids blood backflow by changing certain cam curve or changing pressure pipe block structured method, although this technical scheme can effectively suppress blood backflow, but also introduce larger forward spike simultaneously, in cycle period zero hour, transfusion instantaneous velocity increase suddenly, this impact to patient be have nocuous.
Summary of the invention
The object of the invention is to provide a kind of transfusion peristaltic pump and oscillation compensation thereof, blood backflow control method, can solve the problem of transfusion cyclic fluctuation and blood backflow phenomenon.The object of the invention is realized by following technical scheme:
A kind of transfusion peristaltic pump, comprising: common axis, some cams, some wrigglings refer to, pressure pipe piece and tube for transfusion, and some cams are arranged on common axis in the shape of a spiral, and tube for transfusion is resisted against on pressure pipe piece; Each wriggling refers to vertically arrange movably respectively, upper end with tube for transfusion against coordinating, lower end with cam accordingly against coordinating; It is characterized in that, also comprise compensation creeping mechanism, be arranged at the downstream that described some wrigglings refer to, this compensation creeping mechanism comprise compensation wriggle refer to, bearing, bearing fixed axis, compensation cam, by pressing spring, bearing is wriggled and is referred to be connected with compensation by bearing fixed axis, bearing can, around the rotation of bearing fixed axis, make bearing remain and contact with compensation cam by pressing spring, and compensation cam is fixedly connected with common axis.
As concrete technical scheme, the cam curve of described compensation cam is designed to: in moment in the lower moment of flow velocity, compensation cam is wriggled and referred to push tube for transfusion by cam curve control and compensation; In moment in the higher moment of flow velocity, compensation cam is wriggled and is referred to rollback by cam curve control and compensation.
A kind of oscillation compensation, blood backflow control method based on above-mentioned transfusion peristaltic pump, it is characterized in that, comprise: control described some wrigglings and refer to drive the medicinal liquid in tube for transfusion to flow, and control described compensation cam in the lower moment of medicinal liquid moment flow velocity, wriggle and refer to push tube for transfusion by its cam curve control and compensation, and control described compensation cam in the higher moment of medicinal liquid moment flow velocity, wriggle and refer to rollback by its cam curve control and compensation.
Beneficial effect of the present invention is: by add compensation creeping mechanism on existing transfusion peristaltic pump, in the time that flow rate of liquid is less, compensation creeping mechanism extruding tube for transfusion, increase certain liq output, in the time that flow rate of liquid is larger, compensation creeping mechanism rollback produces suction, reduces certain liq output, the cyclic fluctuation that makes to infuse obtains gently, and blood backflow problem is also resolved.
Brief description of the drawings
Fig. 1 is the structure chart of existing creeping device of infusion pump.
The structure chart of the creeping device of infusion pump that Fig. 2 provides for the embodiment of the present invention.
In the infusion pump creeping mechanism that Fig. 3 provides for the embodiment of the present invention, compensate the structure chart of creeping mechanism.
Fig. 4 is the transfusion instantaneous delivery datagram of existing creeping device of infusion pump under low flow velocity.
The transfusion instantaneous delivery datagram of the infusion pump that Fig. 5 provides for the embodiment of the present invention under low flow velocity.
Fig. 6 is the transfusion instantaneous delivery datagram of existing creeping device of infusion pump under high flow rate.
The transfusion instantaneous delivery datagram of the infusion pump that Fig. 7 provides for the embodiment of the present invention under high flow rate.
Detailed description of the invention
Below in conjunction with accompanying drawing and detailed description of the invention, the present invention is described in further detail.
As shown in Figure 2, the transfusion peristaltic pump that the present embodiment provides except comprising 2,12 cams 3 of bearing 1, pedestal in prior art scheme (as shown in Figure 1), wriggle refer to 4, spring 5, pressure pipe piece 6, tube for transfusion 7, synchronous pulley 8, common axis 9 and motor (not shown), also set up a compensation creeping mechanism 10, refer to that at 12 wrigglings of prior art scheme 4 downstream increases compensation creeping mechanism 10.
Shown in Fig. 2, Fig. 3, compensation creeping mechanism 10 comprises: compensation wriggle refer to 104, bearing 105, bearing fixed axis 103, compensation cam 106, by pressing spring 101.Bearing 105 is wriggled and is referred to that 104 are connected with compensation by bearing fixed axis 103, and bearing 105 can rotate around bearing fixed axis 103.Make bearing 105 remain and contact with compensation cam 106 by pressing spring 101, compensation cam 106 is fixedly connected with common axis 9.
When work, motor (not shown) imports power into creeping mechanism by the synchronous pulley 8 being fixedly connected with common axis 9, is arranged in a spiral manner common axis 9 and 12 cams 3 being fixedly connected with common axis 9 are wriggled and referred to that 4 coordinate with corresponding 12 compensation; Meanwhile, common axis 9 rotates with compensation cam 106, and the compensation coordinating with compensation cam 6 is wriggled and referred to the 4 rotary squeezing tube for transfusions 7 along with cam 6.
In order to reach the compensation to transfusion cyclic fluctuation and to prevent the object of blood backflow, the cam curve of compensation cam 106 is designed to: in moment in the lower moment of flow velocity, compensation cam 6 is wriggled and is referred to 104 extruding tube for transfusions by cam curve control and compensation, increases liquid output; At moment flow velocity higher moment (referring to Fig. 4), compensation cam 106 is wriggled and is referred to 104 rollbacks by cam curve control and compensation, produces suction, to reduce liquid output.So, from the whole cycle, in the time that flow rate of liquid is less, compensation creeping mechanism 10 pushes tube for transfusion, increases certain liq output, in the time that flow rate of liquid is larger, compensation creeping mechanism 10 rollbacks produce suction, reduce certain liq output, transfusion cyclic fluctuation obtains gently, and blood backflow problem is also resolved.
Fig. 4, Fig. 5, for transfusion peristaltic pump compensates for adding the experiment that do creeping mechanism 10 front and back respectively under low flow velocity, can find out, add after compensation creeping mechanism 10, and blood backflow phenomenon is resolved, and transfusion cyclic fluctuation also obtains obviously mild.Fig. 6, Fig. 7, for transfusion peristaltic pump compensates for adding the experiment that do creeping mechanism 10 front and back respectively under high flow velocities, can find out, add the rear transfusion cyclic fluctuation of compensation creeping mechanism 10 to obtain significantly mild.
Claims (3)
1. a transfusion peristaltic pump, comprising: common axis, some cams, some wrigglings refer to, pressure pipe piece and tube for transfusion, and some cams are arranged on common axis in the shape of a spiral, and tube for transfusion is resisted against on pressure pipe piece; Each wriggling refers to vertically arrange movably respectively, upper end with tube for transfusion against coordinating, lower end with cam accordingly against coordinating; It is characterized in that, also comprise compensation creeping mechanism, be arranged at the downstream that described some wrigglings refer to, this compensation creeping mechanism comprise compensation wriggle refer to, bearing, bearing fixed axis, compensation cam, by pressing spring, bearing is wriggled and is referred to be connected with compensation by bearing fixed axis, bearing can, around the rotation of bearing fixed axis, make bearing remain and contact with compensation cam by pressing spring, and compensation cam is fixedly connected with common axis.
2. transfusion peristaltic pump according to claim 1, is characterized in that, the cam curve of described compensation cam is designed to: in moment in the lower moment of flow velocity, compensation cam is wriggled and referred to push tube for transfusion by cam curve control and compensation; In moment in the higher moment of flow velocity, compensation cam is wriggled and is referred to rollback by cam curve control and compensation.
3. the oscillation compensation of a transfusion peristaltic pump claimed in claim 1, blood backflow control method, it is characterized in that, comprise: control described some wrigglings and refer to drive the medicinal liquid in tube for transfusion to flow, and control described compensation cam in the lower moment of medicinal liquid moment flow velocity, wriggle and refer to push tube for transfusion by its cam curve control and compensation, and control described compensation cam in the higher moment of medicinal liquid moment flow velocity, wriggle and refer to rollback by its cam curve control and compensation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410220196.5A CN104056322A (en) | 2014-05-22 | 2014-05-22 | Transfusion peristaltic pump and fluctuation compensation and blood backflow control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410220196.5A CN104056322A (en) | 2014-05-22 | 2014-05-22 | Transfusion peristaltic pump and fluctuation compensation and blood backflow control method thereof |
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| CN104056322A true CN104056322A (en) | 2014-09-24 |
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| CN201410220196.5A Pending CN104056322A (en) | 2014-05-22 | 2014-05-22 | Transfusion peristaltic pump and fluctuation compensation and blood backflow control method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104888309A (en) * | 2015-06-15 | 2015-09-09 | 中国人民解放军第三军医大学第三附属医院 | Integrated intelligent infusion device |
| CN105363094A (en) * | 2015-11-20 | 2016-03-02 | 深圳影迈科技股份有限公司 | Infusion pump and infusion equipment |
| CN109011000A (en) * | 2018-07-25 | 2018-12-18 | 北京科力建元医疗科技有限公司 | A kind of pump installation of infusion pump |
| CN111683701A (en) * | 2017-12-19 | 2020-09-18 | 史密斯医疗Asd公司 | Infusion pump system and method for administration group |
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| US5938413A (en) * | 1995-01-18 | 1999-08-17 | Alaris Medical Systems, Inc. | Method and apparatus for protecting a pump mechanism from extraneous fluid |
| US6267559B1 (en) * | 1999-12-21 | 2001-07-31 | Alaris Medical Systems, Inc. | Apparatus and method for reducing power consumption in a peristaltic pump mechanism |
| US20130149172A1 (en) * | 2011-12-08 | 2013-06-13 | Carefusion 303, Inc. | System and method for improved flow uniformity in a peristaltic pump mechanism |
| CN203001572U (en) * | 2012-12-05 | 2013-06-19 | 张涛 | Infusion tube wall thickness compensation device of infusion pump |
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2014
- 2014-05-22 CN CN201410220196.5A patent/CN104056322A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5938413A (en) * | 1995-01-18 | 1999-08-17 | Alaris Medical Systems, Inc. | Method and apparatus for protecting a pump mechanism from extraneous fluid |
| US6267559B1 (en) * | 1999-12-21 | 2001-07-31 | Alaris Medical Systems, Inc. | Apparatus and method for reducing power consumption in a peristaltic pump mechanism |
| US20130149172A1 (en) * | 2011-12-08 | 2013-06-13 | Carefusion 303, Inc. | System and method for improved flow uniformity in a peristaltic pump mechanism |
| CN203001572U (en) * | 2012-12-05 | 2013-06-19 | 张涛 | Infusion tube wall thickness compensation device of infusion pump |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104888309A (en) * | 2015-06-15 | 2015-09-09 | 中国人民解放军第三军医大学第三附属医院 | Integrated intelligent infusion device |
| CN104888309B (en) * | 2015-06-15 | 2018-02-23 | 中国人民解放军第三军医大学第三附属医院 | Integrated-type intelligent fluid delivery apparatus |
| CN105363094A (en) * | 2015-11-20 | 2016-03-02 | 深圳影迈科技股份有限公司 | Infusion pump and infusion equipment |
| CN105363094B (en) * | 2015-11-20 | 2019-04-05 | 深圳影迈科技有限公司 | Infusion pump and infusion equipment |
| CN111683701A (en) * | 2017-12-19 | 2020-09-18 | 史密斯医疗Asd公司 | Infusion pump system and method for administration group |
| US11904133B2 (en) | 2017-12-19 | 2024-02-20 | Smiths Medical Asd, Inc. | Infusion pump systems and methods for administration sets |
| CN109011000A (en) * | 2018-07-25 | 2018-12-18 | 北京科力建元医疗科技有限公司 | A kind of pump installation of infusion pump |
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