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US3878869A - Liquid transfusion pipe for a very small quantity - Google Patents

Liquid transfusion pipe for a very small quantity Download PDF

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Publication number
US3878869A
US3878869A US36425973A US3878869A US 3878869 A US3878869 A US 3878869A US 36425973 A US36425973 A US 36425973A US 3878869 A US3878869 A US 3878869A
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US
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Grant
Patent type
Prior art keywords
liquid
transfusion
pipe
filaments
tubular
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
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Inventor
Itsuro Yamanouchi
Tsuyoshi Tsuji
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ATOMU KK
Original Assignee
ATOMU KK
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Publication date
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/02Energy absorbers; Noise absorbers
    • F16L55/027Throttle passages
    • F16L55/02763Throttle passages using an element with multiple tubes
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M39/00Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
    • A61M39/08Tubes; Storage means specially adapted therefor
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M39/00Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
    • A61M39/10Tube connectors; Tube couplings
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/141Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor with capillaries for restricting fluid flow
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M39/00Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
    • A61M39/10Tube connectors; Tube couplings
    • A61M2039/1027Quick-acting type connectors

Abstract

The invention relates to a liquid transfusion pipe which comprises an elongate tubular member having an axially extending capillary passage and terminating in connectors one of which is a socket and the other a plug adapted for mating engagement with a plug and socket respectively of connecting lines.

Description

LIQUID TRANSFUSION PIPE FOR A VERY SMALL QUANTITY United States Patent Yamanouchi et al.

PATENTEUAPRza |975 FIG. 5

CITI

LIQUID TRANSFUSION PIPE FOR A VERY SMALL QUANTITY The invention relates to a liquid transfusion pipe for transfusing a small quantity of liquid, and more particularly to a pipe of the kind terminating in connectors and having a capillary passage for controlling the flow rate through a liquid transfusion system adapted to inject Ringers solution or other liquids into the human body.

For transfusing very small quantities of liquid, it is known to adjustably squeese a rubber tube with a pinch cock for obtaining flow rate, down to 120 ml per day or ml per hour. It is, however, difficult with this procedure to control the flow rate when below 5 ml per hour. This is true because at flow rates of less than 5 rnl per hour, precision adjustment of the pinch cock is extremely difficult, and moreover the flow loses its steady state nature. There is frequent need for transfusion at a rate less than 5 ml per hour particularly when treating a newly born baby.

Therefore, it is an object of the invention to provide a liquid transfusion pipe for transfusing a very small quantity of liquid, which pipe includes a capillary passage for maintaining a steady state flow.

It is another object of the invention to provide a liquid transfusion pipe having connectors which permit ready connection with and removal from a liquid transfusion system.

In accordance with the invention, there is provided a liquid transfusion pipe for a very small quantity having a capillary passage the cross-sectional area and the length of which can be varied. Thus, when the liquid transfusion pipe according to the invention is connected in a liquid transfusion system, the flow rate of the liquid to be transfused can be controlled to a desired value so that only an extremely small quantity is injected.

The above and other objects and features of the invention will become apparent from the following detailed description of the embodiments thereof illustrated in the drawings, in which:

FIG. l is a longitudinal section of the liquid transfusion pipe according to the invention,

FIG. 2 is a cross section, to an enlarged scale, taken along the line II-II shown in FIG. 1,

FIG. 3 is a similar cross section of another embodiment,

FIG. 4 is an elevational view of a liquid transfusion system incorporating the pipe according to the invention, and

FIG. 5 is a graph illustrating several examples of the relationship between the available head of the liquid transfusion system of FIG. 4 and the liquid transfusion rate.

n Referring to the drawings the liquid transfusion pipe according to the invention is shown as comprising a tubular member generally denoted by l, which includes a number of axially assembled filaments 2 surrounded by a sleeve 3. The tubular member 1 includes a number of capillary passages 4 defined between adjacent filaments 2. As will clearly be noted from FIG. 2 which shows one example of the tubular member l, the sleeve 3 is moulded from resin so as to firmly encase a number of filaments. 2 surrounded thereby. The filaments 2, which when assembled form capillary passages 4 as mentioned previously, may be formed of synthetic resin such as nylon or polypropylene or of fibre glass. FIG.

3 shows another embodiment of the tubular member having filaments of a shape different from that of the filaments shown in FIG. 2. Each filament of FIG. 3 has axially extending grooves 2a formed therein, which serve as the capillary passages 4. When the filaments are formed of synthetic resin, it is known that any desired cross-sectional shape may be achieved for the filaments in their spinning process, and therefore it should be understood that the profile of the filaments is not limited to those illustrated in FIGS. 2 and 3. Where grooved filaments are used, their apparent diameter is generally greater than the diameter of other shapped filaments. However, it is the total cross-sectional area of capillary passages 4 which is controlling. The crosssectional area depends on the thickness of the filaments, the size of any groove formed therein, the number as well disposition of the filaments, and the degree to which the filaments are compressed when they are encased in the sleeve 3.

The procedure for moulding resin around a bundle of filaments 2 to form the sleeve 3 is not part ofthe invention. A bundle of filaments 2 may, for example, be coated with moulded resin as they are drawn out of thin nozzles.

The tubular member 1 may have a length of I0 cm. and is provided with a pair of connectors 5 and 6 on its opposite ends to permit connection of the tubular member 1 in a liquid transfusion system. One of the connectors comprises a socket 7 while the other connector comprises a plug 8 which is adapted to be in serted into a socket similar to socket 7 of another tubular member permitting thereby connection of a series of tubular members in tandem. The socket 7 is formed with a helical ridge 7a on its inner wall, and the plug 8 is formed on its outer end with a flange 8a which is adapted to engage threadably with the helical ridge 7a of another tubular member. The tubular member 1 and each of the connectors 5 and 6 are assembled by fitting the opposite ends of the tubular member 1 into hollow cylindrical portions 9 and 10 respectively part of connectors 5 and 6, respectively. Each of the connectors 5 and 6 has a path ll or 12 which communicates with the capillary passages formed in the tubular member 1. One of the paths, 1l, is formed in and extends through an axially extending guide member 13 which is integrally formed with the socket 5 and centrally located therein. The other path 12 communicates with an axially extending guide bore 14 centrally formed within the plug 8. The guide member 13 and the guide bore 14 are dimensioned to permit interfitting therebetween. In the FIG. 1 embodiment, a filter l5 is posi tioned in the connector 6 between path 12 and guide bore 14, and advantageously prevents clogging of capillary passages 4.

FIG. 4 is a diagrammatic illustration of a liquid transfusion system. As will be noted, the liquid transfusion pipe or the tubular pipe 1 constructed in accordance with the invention is connected between an irrigator 18 and a cannula 19 by way of a pair of rubber tubes 20 and 21. The interconnection takes place by separately preparing connectors similar to those shown at 5 and 6 and inserting their hollow cylindrical portions similar to those shown at 9 and 10 into the respective tubes 20 and 21. To ensure against inadvertent separation of these cylindrical portions 9 and 10 from tubes 20, 2l, the cylindrical portions are formed with wedge-shaped tabs 9a and 10a thereabout.

With the liquid transfusion pipe ofthe invention, the flow rate therethrough is determined principally by the length of the tubular member 1, the cross-sectional area of its capillary passages, the pressure of the irrigator 18, or the distance between the irrigator and the cannula 19, and the viscosity ofthe liquid to be transfused.

FIG. graphically shows the experimental results in terms of the relationship between the flow rate and the distance between thc irrigator and cannula. For rectilinear curves 1 to 3, the tubular members 1 had a length of cm and substantially similar cross-sectional arca of the capillary passages 4. The curve 4 represents the result obtained with a pair of the transfusion pipes used in plotting the curves 1 to 3, the pair of pipes being connected in parallel. In plotting curves 1 and 4 distilled water was used, for curve 2 ringer lactate and for curve 3 l0 percent glucose. As far as the data shown in FIG. 5 are concerned, it is considered that the flow rate through the liquid transfusion pipe of the invention obeys the Poiseuille-Hagens formula:

As will be readily understood from the foregoing description, a varying flow rate can be obtained using a liquid transfusion pipe having a fixed cross-sectional area for the capillary passages 4, by varying the length of the tube l or by varying the height of the irrigator 18. The use ofa liquid transfusion pipe having different cross-sectional areas for the capillary passages 4 permits even greater control ofthe flow rate. It will be apparent from the foregoing that the use of a liquid transfusion pipe according to the invention assures a steady state flow rate and maintains liquid pressure transfused in the cannula 19 constant, thereby avoiding possibility of coagulation which may occur due to reverse flow through the cannula.

What is claimed is:

1. A liquid transfusion pipe for transfusing a small quantity of liquid and comprising an elongate tubular member having an axially extending capillary passage therein, and a pair of connectors, one at one end of the tubular member and the other at the opposite end of the tubular member, said one of said pair of connectors comprising a socket having a helical ridge on its inner wall and said other of said pair of connectors comprising a plug having a flange, said helical ridge and said flange being adapted for respective engagement with a flange and a helical ridge ofa like plug and a like socket provided on separate connecting lines.

2. A liquid transfusion pipe according to claim l in which the tubular member contains a plurality of filaments between which are defined a plurality of capillary passages, an elongate sleeve encasing the filaments.

3. A liquid transfusion pipe according to claim 2 in which the filaments are substantially circular in cross section.

4. A liquid transfusion pipe according to claim 2 in which the filaments have axially extending grooves formed in their outer periphery, said capillary passages being defined between said filaments in spaces provided by the grooves.

5. A liquid transfusion pipe according to claim 2 in which the sleeve comprises resin moulded around the assembled filaments.

6. A liquid transfusion pipe according to claim 2 in which the filaments are formed of synthetic resin.

7. A liquid transfusion pipe according to claim 2 in which the filaments are formed of fibre glass.

8. A liquid transfusion pipe according to claim 2 in which each of the connectors has a space which cornmunicates with the capillary passages of the tubular

Claims (8)

1. A liquid transfusion pipe for transfusing a small quantity of liquid and comprising an elongate tubular member having an axially extending capillary passage therein, and a pair of connectors, one at one end of the tubular member and the other at the opposite end of the tubular member, said one of said pair of connectors comprising a socket having a helical ridge on its inner wall and said other of said pair of connectors comprising a plug having a flange, said helical ridge and said flange being adapted for respective engagement with a flange and a helical ridge of a like plug and a like socket provided on separate connecting lines.
1. A liquid transfusion pipe for transfusing a small quantity of liquid and comprising an elongate tubular member having an axially extending capillary passage therein, and a pair of connectors, one at one end of the tubular member and the other at the opposite end of the tubular member, said one of said pair of connectors comprising a socket having a helical ridge on its inner wall and said other of said pair of connectors comprising a plug having a flange, said helical ridge and said flange being adapted for respective engagement with a flange and a helical ridge of a like plug and a like socket provided on separate connecting lines.
2. A liquid transfusion pipe according to claim 1 in which the tubular member contains a plurality of filaments between which are defined a plurality of capillary passages, an elongate sleeve encasing the filaments.
3. A liquid transfusion pipe according to claim 2 in which the filaments are substantially circular in cross section.
4. A liquid transfusion pipe according to claim 2 in which the filaments have axially extending grooves formed in their outer periphery, said capillary passages being defined between said filaments in spaces provided by the grooves.
5. A liquid transfusion pipe according to claim 2 in which the sleeve comprises resin moulded around the assembled filaments.
6. A liquid transfusion pipe according to claim 2 in which the filaments are formed of synthetic resin.
7. A liquid transfusion pipe according to claim 2 in which the filaments are formed of fibre glass.
US3878869A 1972-05-29 1973-05-29 Liquid transfusion pipe for a very small quantity Expired - Lifetime US3878869A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5322372A JPS5225678B2 (en) 1972-05-29 1972-05-29

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JP (1) JPS5225678B2 (en)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2320113A1 (en) * 1975-08-07 1977-03-04 Baxter Laboratories Inc Device intravenous solution injection comprising an element of internal diameter shrunk
FR2333521A1 (en) * 1975-12-03 1977-07-01 Burron Medical Prod Inc A device for administering a fluid parenterally
FR2395758A2 (en) * 1975-08-07 1979-01-26 Baxter Travenol Lab Parenteral liq. infusion set - with two drip feed bottles has tubing designed to prevent negative pressure at junction
US4146028A (en) * 1977-03-29 1979-03-27 Burron Medical Products, Inc. Intravenous system having an accumulator tube therein
US4621989A (en) * 1979-07-28 1986-11-11 Herwig Burgert Support disc for pump diaphragm
US4781698A (en) * 1987-04-09 1988-11-01 Parren Mark L Selectable drop size infusion metering device
WO1989001065A1 (en) * 1987-07-25 1989-02-09 Gebrüder Schmeing Gmbh & Co. Kg Device for preventing the deposit of fly fibre
US4892524A (en) * 1987-10-30 1990-01-09 Gordon Smith Intravenous administration system
WO1996002289A1 (en) * 1994-07-19 1996-02-01 Abbott Laboratories Anti-squirting orifice flow control device
WO1996020744A1 (en) * 1995-01-07 1996-07-11 Volker Lang Micro-infusion system
US6013184A (en) * 1995-09-19 2000-01-11 Asahi Medical Co., Ltd. Device for depletion of leukocytes
US20030054300A1 (en) * 2001-09-15 2003-03-20 Castaldi Marco J. Apparatus having similar interstitial passages
US20060070669A1 (en) * 2002-09-19 2006-04-06 I-Flow Device for selectively regulating the flow rate of a fluid
US20090314352A1 (en) * 2008-06-19 2009-12-24 Hyun Dongchul D Variable flow rate controller

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5235892U (en) * 1975-09-04 1977-03-14

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1165564A (en) * 1912-12-19 1915-12-28 Schaeffer & Budenberg Mfg Co Thermometer.
US3078878A (en) * 1959-05-25 1963-02-26 Penn Controls Capillary element
US3250469A (en) * 1963-08-05 1966-05-10 Bowles Eng Corp Pure fluid function generating system
US3529632A (en) * 1968-11-21 1970-09-22 Moore & Co Samuel Composite tubing
US3630229A (en) * 1970-04-09 1971-12-28 Us Navy Quiet fluid flow regulator

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1165564A (en) * 1912-12-19 1915-12-28 Schaeffer & Budenberg Mfg Co Thermometer.
US3078878A (en) * 1959-05-25 1963-02-26 Penn Controls Capillary element
US3250469A (en) * 1963-08-05 1966-05-10 Bowles Eng Corp Pure fluid function generating system
US3529632A (en) * 1968-11-21 1970-09-22 Moore & Co Samuel Composite tubing
US3630229A (en) * 1970-04-09 1971-12-28 Us Navy Quiet fluid flow regulator

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2320113A1 (en) * 1975-08-07 1977-03-04 Baxter Laboratories Inc Device intravenous solution injection comprising an element of internal diameter shrunk
US4034754A (en) * 1975-08-07 1977-07-12 Baxter Travenol Laboratories, Inc. Intravenous solution set having a constricted inner diameter portion
US4105029A (en) * 1975-08-07 1978-08-08 Baxter Travenol Laboratories, Inc. Intravenous solution set having an air access site and constricted inner diameter portion
FR2395758A2 (en) * 1975-08-07 1979-01-26 Baxter Travenol Lab Parenteral liq. infusion set - with two drip feed bottles has tubing designed to prevent negative pressure at junction
FR2333521A1 (en) * 1975-12-03 1977-07-01 Burron Medical Prod Inc A device for administering a fluid parenterally
US4037596A (en) * 1975-12-03 1977-07-26 Burron Medical Products, Inc. Parenteral administration set with internal valve and flow restrictor
US4146028A (en) * 1977-03-29 1979-03-27 Burron Medical Products, Inc. Intravenous system having an accumulator tube therein
US4621989A (en) * 1979-07-28 1986-11-11 Herwig Burgert Support disc for pump diaphragm
US4781698A (en) * 1987-04-09 1988-11-01 Parren Mark L Selectable drop size infusion metering device
WO1989001065A1 (en) * 1987-07-25 1989-02-09 Gebrüder Schmeing Gmbh & Co. Kg Device for preventing the deposit of fly fibre
US5081737A (en) * 1987-07-25 1992-01-21 Gebruder Schmeing Gmbh & Co. Apparatus for eliminating deposits of floating fibers
US4892524A (en) * 1987-10-30 1990-01-09 Gordon Smith Intravenous administration system
WO1996002289A1 (en) * 1994-07-19 1996-02-01 Abbott Laboratories Anti-squirting orifice flow control device
WO1996020744A1 (en) * 1995-01-07 1996-07-11 Volker Lang Micro-infusion system
US6013184A (en) * 1995-09-19 2000-01-11 Asahi Medical Co., Ltd. Device for depletion of leukocytes
US20030054300A1 (en) * 2001-09-15 2003-03-20 Castaldi Marco J. Apparatus having similar interstitial passages
US20060070669A1 (en) * 2002-09-19 2006-04-06 I-Flow Device for selectively regulating the flow rate of a fluid
US7455072B2 (en) * 2002-09-19 2008-11-25 I-Flow Corporation Device for selectively regulating the flow rate of a fluid
US20090099504A1 (en) * 2002-09-19 2009-04-16 Eric Mabry Device for selectively regulating the flow rate of a fluid
US7661440B2 (en) * 2002-09-19 2010-02-16 I-Flow Corporation Device for selectively regulating the flow rate of a fluid
US20090314352A1 (en) * 2008-06-19 2009-12-24 Hyun Dongchul D Variable flow rate controller
US8118061B2 (en) 2008-06-19 2012-02-21 Acacia, Inc. Variable flow rate controller
US8403004B2 (en) 2008-06-19 2013-03-26 Medical Product Specialists Variable flow rate controller

Also Published As

Publication number Publication date Type
JPS5225678B2 (en) 1977-07-08 grant
JP897828C (en) grant
JPS4910587A (en) 1974-01-30 application

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