WO2001089609A1 - Device for controlling the flow of liquid using a tube - Google Patents

Device for controlling the flow of liquid using a tube Download PDF

Info

Publication number
WO2001089609A1
WO2001089609A1 PCT/SE2001/001138 SE0101138W WO0189609A1 WO 2001089609 A1 WO2001089609 A1 WO 2001089609A1 SE 0101138 W SE0101138 W SE 0101138W WO 0189609 A1 WO0189609 A1 WO 0189609A1
Authority
WO
WIPO (PCT)
Prior art keywords
tube
flow
longing
shortening
liquid
Prior art date
Application number
PCT/SE2001/001138
Other languages
French (fr)
Inventor
Hans Tillander
Original Assignee
Premetec Ab
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Premetec Ab filed Critical Premetec Ab
Priority to JP2001585849A priority Critical patent/JP2003534060A/en
Priority to CA002409822A priority patent/CA2409822A1/en
Priority to AT01934773T priority patent/ATE280598T1/en
Priority to DK01934773T priority patent/DK1284759T3/en
Priority to AU2001260925A priority patent/AU2001260925A1/en
Priority to EP01934773A priority patent/EP1284759B1/en
Priority to DE60106752T priority patent/DE60106752T2/en
Publication of WO2001089609A1 publication Critical patent/WO2001089609A1/en
Priority to US10/299,275 priority patent/US6676104B2/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K7/00—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves
    • F16K7/02—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with tubular diaphragm
    • 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
    • A61M5/16813—Flow controllers by controlling the degree of opening of the flow line
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K7/00—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves
    • F16K7/02—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with tubular diaphragm
    • F16K7/08—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with tubular diaphragm constrictable by twisting

Definitions

  • the present invention relates to a device with an elastic tube for a varied flow through said tube, whereby the device comprises a tube being fixed at its two ends.
  • the object of the present invention is to obtain a device with an elastic tube by means of which device a predetermined, varied and controllable flow through the tube, can be obtained.
  • peristaltic pumps in particular for pumping small volumes, which pumps comprise a tube arranged on the inside of a circular house against which tube a number of rolls are arranged to act rotatably and by means of their rotation press a liquid through the tube.
  • the flow volume through the tube is dependent on the rotational speed of the rolls against the tube.
  • valve devices at infusion tubes for regulating the flow through the tube. It has, however, turned out that these valves do not provide a constant flow and do not provide reproducible flows.
  • FIG. 1 shows a device according to the invention seen from above
  • FIG. 2 the device of FIG. 1 seen in a cross-sectional view along the line 11-11.
  • the wheel 4 is suitably provided with an arcuate recess 6 in which a tube 7 is arranged to be introduced.
  • the tube 7 which is suitably a silicone polymer tube, is at its two ends releasably attached to two nipples 8 arranged in the short end side 9 of the house 1.
  • the nipples 8 are provided with through-going holes (not shown) for communicating with nipples 10 arranged on the outside of the house 1, which nipples are arranged to be connected to a liquid container and e.g., a patient, respectively, via a tube (not shown). Underneath the wheel 4 in the track 3 there is a screw 11 arranged for the fixation of the wheel 4 in a desired position.
  • the tube 7 When the wheel 4 is moved along the track 3 the tube 7 is strained and is stretched due to its elastic properties. Simultaneous with the stretching, the lumen 12 of the tube 7 will be reduced as well, which conclusively means that the flow will become down-regulated from a first less stretched condition to a second more stretched condition.
  • the volume flow at laminar flow is
  • the formula means that the flow is reciprocally proportional to the length of the tube but proportional to the forth power of the diameter of the tube.
  • the diameter of the tube thus plays a dominating role and at small liquid flows and, particularly at liquids comprising particles, such as blood, which is commonly present in medical situations, it is thus difficult to control the flow only by means of changing the diameter of the tube.
  • the change becomes exponential and extremely small changes of the diameter of the tube provides great changes of the liquid flow which is evident from the attached graph.
  • the change of the length of the tube provides a more even change of the flow but is hard to carry out from a practical point of view. A simultaneous change of the length of the tube and diameter will thus become more optimal.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Hematology (AREA)
  • General Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Anesthesiology (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)
  • Reciprocating Pumps (AREA)
  • External Artificial Organs (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Catching Or Destruction (AREA)

Abstract

The present invention relates to a device containing a tube for a varied flow, comprising a tube (7) being fixed in both its ends, whereby the tube (7) is arranged to be stretched or shortened by longing or shortening of the distance between said attachment points (8).

Description

TITLE
Device for controlling the flow of liquid using a tube.
DESCRIPTION
Technical field
The present invention relates to a device with an elastic tube for a varied flow through said tube, whereby the device comprises a tube being fixed at its two ends.
The object of the present invention is to obtain a device with an elastic tube by means of which device a predetermined, varied and controllable flow through the tube, can be obtained.
Background of the invention
It is previously known different peristaltic pumps, in particular for pumping small volumes, which pumps comprise a tube arranged on the inside of a circular house against which tube a number of rolls are arranged to act rotatably and by means of their rotation press a liquid through the tube. The flow volume through the tube is dependent on the rotational speed of the rolls against the tube.
It is further known valve devices at infusion tubes for regulating the flow through the tube. It has, however, turned out that these valves do not provide a constant flow and do not provide reproducible flows.
Description of the present invention
It has now surprisingly turned out possible to be able to obtain a reproducible, varied and controllable flow by means of the present invention which is characterized in that the tube is arranged to be stretched by means of a longing of the distance between its points of attachment.
Further characteristics are evident from the accompanying claims. By means of the present invention it is obtained that the flow can be varied in a very efficient and accurate way which is particularly essential at infusions where great demands for a constant flow is due, in order not to e.g., overdosing at a drug infusion.
The present invention will now be described more in detail with reference to the attached drawing, which shows a preferred embodiment, however, without being restricted hereto. In the drawing
FIG. 1 shows a device according to the invention seen from above; and
FIG. 2 the device of FIG. 1 seen in a cross-sectional view along the line 11-11.
1 denotes in general a house which in its bottom part 2 is provided with a track 3. In the track 3 there is a wheel 4 movably arranged. Position markings 5 are further arranged along the track 3. The wheel 4 is suitably provided with an arcuate recess 6 in which a tube 7 is arranged to be introduced. The tube 7 which is suitably a silicone polymer tube, is at its two ends releasably attached to two nipples 8 arranged in the short end side 9 of the house 1. The nipples 8 are provided with through-going holes (not shown) for communicating with nipples 10 arranged on the outside of the house 1, which nipples are arranged to be connected to a liquid container and e.g., a patient, respectively, via a tube (not shown). Underneath the wheel 4 in the track 3 there is a screw 11 arranged for the fixation of the wheel 4 in a desired position.
When the wheel 4 is moved along the track 3 the tube 7 is strained and is stretched due to its elastic properties. Simultaneous with the stretching, the lumen 12 of the tube 7 will be reduced as well, which conclusively means that the flow will become down-regulated from a first less stretched condition to a second more stretched condition. The volume flow at laminar flow is
V - k Δp D4 t 1
V = volume t = time
Δp = pressure fall between the ends of the tube D4 = forth potence of the diameter of the lumen of the tube 1 = the length of the tube k = π / 128 η, wherein η is the dynamic viscosity of the liquid
The formula means that the flow is reciprocally proportional to the length of the tube but proportional to the forth power of the diameter of the tube. The diameter of the tube thus plays a dominating role and at small liquid flows and, particularly at liquids comprising particles, such as blood, which is commonly present in medical situations, it is thus difficult to control the flow only by means of changing the diameter of the tube. The change becomes exponential and extremely small changes of the diameter of the tube provides great changes of the liquid flow which is evident from the attached graph. The change of the length of the tube provides a more even change of the flow but is hard to carry out from a practical point of view. A simultaneous change of the length of the tube and diameter will thus become more optimal.
By successively straining an elastic tube, one will simultaneously obtain, together with a longing of the tube, a narrowing of the lumen which provides an optimal and almost linear control of the liquid flow.
In the trial given below an elastic tube being 180 mm long and having a lumen of 0.5 mm. The pressure fall was 0.1 mbar. Each step in the following flow table means a longing of 8 mm. Table
Change of length Flow from 180 mm ml/hr
0 420
2 390
4 360
6 330
8 300
10 270
12 240
14 210
16 180
18 150
20 120
22 90
24 60
As evident from the results provided an almost linear change of the flow amount is obtained which means an assumption for an exact dosage of the flow at small flow amounts without using a compulsory pump function with the drawbacks this leads to.
By adopting the length of the tube, the wall thickness of the tube, the lumen diameter, and the elastic construction to get a widespread utilization.

Claims

1. Device containing a tube for a varied flow, comprising a tube (7) being fixed at its both ends, characterized in that the tube (7) is arranged to be stretched or shortened by longing or shortening of the distance between said attachment points (8).
2. Device according to claim 1, characterized in that it comprises at least one arc shaped surface (4) arranged to receive said tube (7), that the arc shaped surface (4) is arranged to be adjustably moved in a longitudinal direction for longing or shortening said tube (7).
3. Device according to claim 1, characterized in that the tube (7) is an infusion tube.
4. Device according to claim 1-3, characterized in that the tube is of an elastic material.
5. Device according to claim 4, characterized in that the tube is a silicone material tube.
6. Device according to claim 2, characterized in that the arc shaped surface (4) is at least one wheel provided with a radially inwardly directed recess (6) for receiving said tube (7).
7. Device according to claim 1-6, characterized in that the tube (7) is arranged in a system to control the flow through the same.
8. Process for controlling a flow through a tube, characterized in that one stretch or nnnn an elastic tube between two attachment points (8) for on one hand longing or shortening said tube, on the other hand narrowing or widening its lumen (12).
PCT/SE2001/001138 2000-05-19 2001-05-21 Device for controlling the flow of liquid using a tube WO2001089609A1 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
JP2001585849A JP2003534060A (en) 2000-05-19 2001-05-21 Fluid flow control device using tube
CA002409822A CA2409822A1 (en) 2000-05-19 2001-05-21 Device for controlling the flow of liquid using a tube
AT01934773T ATE280598T1 (en) 2000-05-19 2001-05-21 DEVICE FOR CONTROLLING FLOWS OF LIQUID USING A TUBE
DK01934773T DK1284759T3 (en) 2001-05-21 2001-05-21 Device for controlling a fluid using a tube
AU2001260925A AU2001260925A1 (en) 2000-05-19 2001-05-21 Device for controlling the flow of liquid using a tube
EP01934773A EP1284759B1 (en) 2000-05-19 2001-05-21 Device for controlling the flow of liquid using a tube
DE60106752T DE60106752T2 (en) 2000-05-19 2001-05-21 DEVICE FOR CONTROLLING FLUID FLOWS WITH THE HELP OF A TUBE
US10/299,275 US6676104B2 (en) 2000-05-19 2002-11-19 Device for controlling the flow of liquid using a tube

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0001852-3 2000-05-19
SE0001852A SE524080C2 (en) 2000-05-19 2000-05-19 Device with hose

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US10/299,275 Continuation US6676104B2 (en) 2000-05-19 2002-11-19 Device for controlling the flow of liquid using a tube

Publications (1)

Publication Number Publication Date
WO2001089609A1 true WO2001089609A1 (en) 2001-11-29

Family

ID=20279735

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2001/001138 WO2001089609A1 (en) 2000-05-19 2001-05-21 Device for controlling the flow of liquid using a tube

Country Status (11)

Country Link
US (1) US6676104B2 (en)
EP (1) EP1284759B1 (en)
JP (1) JP2003534060A (en)
CN (1) CN1232312C (en)
AT (1) ATE280598T1 (en)
AU (1) AU2001260925A1 (en)
CA (1) CA2409822A1 (en)
DE (1) DE60106752T2 (en)
ES (1) ES2233638T3 (en)
SE (1) SE524080C2 (en)
WO (1) WO2001089609A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2133610A1 (en) * 2007-04-05 2009-12-16 Asahi Breweries, Ltd. Device for choking fluid flow

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7094216B2 (en) * 2000-10-18 2006-08-22 Medrad, Inc. Injection system having a pressure isolation mechanism and/or a handheld controller
US7392085B2 (en) * 2001-11-21 2008-06-24 Cameron Health, Inc. Multiple electrode vectors for implantable cardiac treatment devices
US9433730B2 (en) 2013-03-14 2016-09-06 Bayer Healthcare Llc Fluid mixing control device for a multi-fluid delivery system
US7766883B2 (en) * 2007-10-30 2010-08-03 Medrad, Inc. System and method for proportional mixing and continuous delivery of fluids
US9011377B2 (en) 2008-11-05 2015-04-21 Bayer Medical Care Inc. Fluid mixing control device for a multi-fluid delivery system
US8211060B2 (en) 2005-05-10 2012-07-03 Palyon Medical (Bvi) Limited Reduced size implantable pump
US8915893B2 (en) 2005-05-10 2014-12-23 Palyon Medical (Bvi) Limited Variable flow infusion pump system
US8114055B2 (en) 2005-05-10 2012-02-14 Palyon Medical (Bvi) Limited Implantable pump with infinitely variable resistor
US7637892B2 (en) * 2005-05-10 2009-12-29 Palyon Medical (Bvi) Limited Variable flow infusion pump system
CN103269731B (en) * 2010-10-01 2015-11-25 泽维克斯公司 For improving the method for the degree of accuracy of peristaltic pump system based on tube material performance
US9700672B2 (en) 2011-09-21 2017-07-11 Bayer Healthcare Llc Continuous multi-fluid pump device, drive and actuating system and method
US9980692B2 (en) 2011-11-08 2018-05-29 Koninklijke Philips N.V. System and method for interactive annotation of an image using marker placement command with algorithm determining match degrees
US8568360B2 (en) 2011-12-28 2013-10-29 Palyon Medical (Bvi) Limited Programmable implantable pump design
KR102528289B1 (en) 2015-01-09 2023-05-03 바이엘 헬쓰케어 엘엘씨 Multiple fluid delivery systems with multiple use disposable sets and features thereof
CN110960747B (en) * 2019-12-19 2021-08-06 山东大学齐鲁医院 High-precision analgesia pump and working method
CN110975058B (en) * 2019-12-19 2021-08-10 齐鲁理工学院 Automatically-adjustable analgesia pump and working method
CN110898290B (en) * 2019-12-31 2021-07-30 山东大学齐鲁医院 Multifunctional portable infusion device and working method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0045668A1 (en) * 1980-08-06 1982-02-10 Peter Steer Developments Limited Device for controlling the flow of liquid
US4671320A (en) * 1985-07-19 1987-06-09 Victor Grifols Lucas Adjustable valve for liquids for equipment having a medical application

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3773034A (en) * 1971-11-24 1973-11-20 Itt Research Institute Steerable catheter
US4478434A (en) * 1982-10-14 1984-10-23 Little Gerald R Hose mender device
US5643279A (en) * 1996-03-12 1997-07-01 Cordis Corporation Method of catheter balloon manufacture and use

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0045668A1 (en) * 1980-08-06 1982-02-10 Peter Steer Developments Limited Device for controlling the flow of liquid
US4671320A (en) * 1985-07-19 1987-06-09 Victor Grifols Lucas Adjustable valve for liquids for equipment having a medical application

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2133610A1 (en) * 2007-04-05 2009-12-16 Asahi Breweries, Ltd. Device for choking fluid flow
EP2133610A4 (en) * 2007-04-05 2012-10-10 Asahi Breweries Ltd Device for choking fluid flow
US9103451B2 (en) 2007-04-05 2015-08-11 Asahi Breweries, Ltd. Device for stopping flow of fluid

Also Published As

Publication number Publication date
CA2409822A1 (en) 2001-11-29
JP2003534060A (en) 2003-11-18
DE60106752D1 (en) 2004-12-02
SE0001852L (en) 2001-11-20
US6676104B2 (en) 2004-01-13
ES2233638T3 (en) 2005-06-16
CN1232312C (en) 2005-12-21
CN1441682A (en) 2003-09-10
AU2001260925A1 (en) 2001-12-03
SE0001852D0 (en) 2000-05-19
SE524080C2 (en) 2004-06-22
US20030116730A1 (en) 2003-06-26
EP1284759A1 (en) 2003-02-26
EP1284759B1 (en) 2004-10-27
DE60106752T2 (en) 2006-02-16
ATE280598T1 (en) 2004-11-15

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