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GB2414678A - Medical Valve Assembly - Google Patents

Medical Valve Assembly Download PDF

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Publication number
GB2414678A
GB2414678A GB0513476A GB0513476A GB2414678A GB 2414678 A GB2414678 A GB 2414678A GB 0513476 A GB0513476 A GB 0513476A GB 0513476 A GB0513476 A GB 0513476A GB 2414678 A GB2414678 A GB 2414678A
Authority
GB
United Kingdom
Prior art keywords
side branch
pipe
straight pipe
fluid
confluence
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.)
Withdrawn
Application number
GB0513476A
Other versions
GB0513476D0 (en
Inventor
Nobuo Enomoto
Norio Miyagi
Koki Okanda
Mitsuji Hosoda
Kazuo Yamada
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Enomoto Co Ltd
Original Assignee
Enomoto Co Ltd
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
Priority claimed from JP2002300049A external-priority patent/JP2004129981A/en
Priority claimed from JP2002370104A external-priority patent/JP2004195078A/en
Application filed by Enomoto Co Ltd filed Critical Enomoto Co Ltd
Priority claimed from GB0304986A external-priority patent/GB2387333B/en
Publication of GB0513476D0 publication Critical patent/GB0513476D0/en
Publication of GB2414678A publication Critical patent/GB2414678A/en
Withdrawn legal-status Critical Current

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
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • F16K27/0236—Diaphragm cut-off apparatus
    • 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
    • A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
    • A61M39/20—Closure caps or plugs for connectors or open ends of tubes
    • 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
    • A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
    • A61M39/22—Valves or arrangement of valves
    • A61M39/24—Check- or non-return valves
    • 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
    • A61M5/1407—Infusion of two or more substances
    • A61M5/1408—Infusion of two or more substances in parallel, e.g. manifolds, sequencing valves
    • 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
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/10—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit
    • F16K11/105—Three-way check or safety valves with two or more closure members
    • 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
    • F16K15/00—Check valves
    • F16K15/14—Check valves with flexible valve members
    • F16K15/144—Check valves with flexible valve members the closure elements being fixed along all or a part of their periphery
    • F16K15/147—Check valves with flexible valve members the closure elements being fixed along all or a part of their periphery the closure elements having specially formed slits or being of an elongated easily collapsible form
    • 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
    • A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
    • A61M39/22—Valves or arrangement of valves
    • A61M39/24—Check- or non-return valves
    • A61M2039/242—Check- or non-return valves designed to open when a predetermined pressure or flow rate has been reached, e.g. check valve actuated by fluid
    • 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
    • A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
    • A61M39/22—Valves or arrangement of valves
    • A61M39/24—Check- or non-return valves
    • A61M2039/2426—Slit valve
    • 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
    • A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
    • A61M39/22—Valves or arrangement of valves
    • A61M39/24—Check- or non-return valves
    • A61M2039/2493—Check valve with complex design, e.g. several inlets and outlets and several check valves in one body

Landscapes

  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • Biomedical Technology (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Anesthesiology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Mechanical Engineering (AREA)
  • Pulmonology (AREA)
  • Vascular Medicine (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

A medical valve assembly having a first straight pipe 81 arranged in line with a second straight pipe 82, and one or more side branches 83 intersecting the first and second straight pipes 81, 82 at a confluence 84. A check valve 3 is sealingly mounted inside at least one branch pipe 83 permitting uni-directional flow of a fluid or gas from a free end of the branch pipe to the confluence 84. Part of the side branch pipe concealing the check valve 3 is a flexible portion 67 made of an elastic material. Pressure applied to the flexible portion 67 deforms the check valve, allowing fluid to pass from the confluence to the free end of the branch.

Description

241 4678 ( - 1
MEDICAL DEVICE
BACKGROUND OF THE INVENTION
Field of the Invention
The present invention relates to a side branch pipe.
Description of the Related Art
The prior art (a three-way stopcock)
Three-way stopcocks are used for blood transfusion or infusion in hospitals, clinics, or animal hospitals.
A three-way stopcock includes: a body having a first branch pipe, a second branch pipe, and a third branch pipe; and a path switching portion that can be rotatably and fluid-tightly fitted to the body, and has a fluid path that provides communication between predetermined branch pipes among said branch pipes, and the path switching portion is rotated with respect to the body to switch the fluid path.
[Patent document 1] Japanese Patent Laid-Open No. 2002-153562 [Patent document 2] Japanese Utility Model Registration No. 2599493 [Patent document 3] Japanese Patent No. 2764432 [Patent document 4] Japanese Patent Laid-Open No. 10-234863 - 2 [Patent document 5] Japanese Patent Laid-Open No. 9-280394 [Patent document 6] Japanese Patent Laid-Open No. 8-155039 [Patent document 7] Japanese Utility Model Laid-Open No. 6-044554 For example, an indwelling needle is inserted into a patient's vein, and a rear end of the indwelling needle and the first branch pipe are connected by a tube. The second branch pipe is connected to a blood transfusion bag by another tube, and the third branch pipe is connected to a syringe containing an inhibitor of blood coagulation by a further tube. With the path switching portion being rotated to provide communication between the first, the second, and the third branch pipes, blood and the inhibitor of blood coagulation are infused into the patient at the same time. After a predetermined time, with the path switching portion being further rotated to provide communication between the first and the second branch pipes, the blood only is infused into the patient. In this way, the path switching portion is appropriately rotated for blood transfusion.
An infusion solution, a glucose solution, an antibiotic solution, or the like are switched and mixed every predetermined hour for infusion into the patient's vein. If required, the paths switching portion is appropriately rotated to collect blood in midstream.
However, when the three-way stopcock is used, a medical practitioner such as a doctor or a nursing person, or a patient may rotate the paths switching portion to switch the path of the branch pipe to a wrong position, leading to a medical accident.
The patient (especially, an infant or a demented elderly) may rotate the path switching portion, and thus the patient's condition may sharply become worse, and potentially endangering the patient's life.
SUMMARY OF THE INVENTION
Therefore, a first object of the invention is to prevent medical accidents or accidents resulting from unintentional operations that may occur in using the three-way stopcock, and for this purpose, to develop a novel side branch pipe.
The above object is achieved by a first aspect of the invention according to claim 1, specifically, a medical side branch pipe in which a first straight pipe and a second straight pipe are arranged on a line, and one or more side branches intersect the first straight pipe and the second straight pipe at a confluence and communicate with each other, wherein at least one side branch has a check valve therein such that a fluid or a gas from a free end of the side branch to the confluence l pass, but a fluid or a gas from the confluence to the free end are blocked and do not flow.
In a preferable embodiment according to the first aspect of the invention, as described in claim 2, there is provided a medical side branch pipe in which a first straight pipe and a second straight pipe are arranged on a line, and one or more side branches intersect the first straight pipe and the second straight pipe at a confluence and communicate with each other, wherein at least one side branch has a check valve therein, part of a side surface of the side branch near the check valve is a flexible portion made of an elastic material, and when the flexible portion is not pressed, a fluid and a gas from a free end of the side branch pipe to the confluence pass, but a fluid and a gas from the confluence to the free end are blocked and do not flow, though when the flexible portion is pressed, the fluid and the gas pass from the confluence to the free end.
In a preferable embodiment according to the first aspect of the invention, as described in claim 3, the medical side branch pipe further includes a pressing tool capable of keeping the flexible portion pressed and releasing the press.
In a preferable embodiment according to the first aspect of the invention, as described in claim 4, the check valve includes: a valve holder that has a tapered pipe, and a small diameter pipe connecting to a small - 5 diameter opening of the tapered pipe and extending outwards, a large diameter opening of the tapered pipe being fluid-tightly fitted to an inner surface of a side branch; and a flexible valve body that is fitted to an outer peripheral surface of the small diameter pipe of the valve holder, and has a slit that is opened by a fluid pressure from a large diameter opening side of the tapered pipe, or by a lateral pressure, but closed by a fluid pressure from a small diameter pipe side.
In the prior three-way stopcock, no mark is provided that indicates a position to be pressed with a finger or a position of the pressing tool, and it is difficult to find or confirm such positions. Especially during the night, should a light be off, the medical practitioner, such as a nurse, has to turn on a flashlight to find or confirm the positions, and such work is difficult.
Therefore, a second object of the invention is to provide a side branch pipe that facilitates finding and confirming a position to be pressed with a finger or a position of a pressing tool.
The second object is achieved by a second aspect of the invention according to claim 9, specifically, the side branch pipe according to any one of claims 2 and 3, wherein the flexible portion is coloured, or coated with fluorescent paint, or a colour tape or a fluorescent paint tape is affixed to the flexible portion. l
The second object is also achieved by a third aspect of the invention according to claim 10, specifically, the side branch pipe according to claim 3, wherein a material for the pressing tool contains fluorescent paint, or the pressing tool is coloured, or coated with fluorescent paint, or a colour tape, a fluorescent paint tape, or a reflection sheet is affixed to the pressing tool.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a plan view of a side branch pipe according to a first embodiment; FIG. 2 is a plan view of a side branch pipe according to a second embodiment; FIG. 3 is a front view of the side branch pipe according to the second embodiment; EIG. 4 is a plan view of a side branch pipe according to a third embodiment; FIG. 5 is a plan view of a side branch pipe according to a fourth embodiment; FIG. 6 is a front view of the side branch pipe according to the fourth embodiment; FIG. 7 is a plan view of a side branch pipe according to a fifth embodiment; FIG. 8 is a front view of the side branch pipe according to the fifth embodiment; l 7 FIG. 9 is a schematic view of a modification according to the fifth embodiment; FIG. 10 is a plan view of a side branch pipe according to a sixth embodiment; FIG. 11 is a front view of the side branch pipe according to the sixth embodiment; and FIG. 12 is a plan view of a side branch pipe according to a seventh embodiment.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
Hereinafter, embodiments of the invention will be described in detail with reference to the accompanying drawings.
Embodiments of the invention will be described.
First embodiment (first aspect of the invention) FIG. 1 is a plan view of a side branch pipe according to a first embodiment.
A side branch pipe includes a first straight pipe 81, a second straight pipe 82, a side branch 83, and a confluence 84. The first straight pipe 81 and the second straight pipe 82 are arranged on a line. The first straight pipe 81 and the side branch 83 intersect at the confluence 84. The second straight pipe 82 and the side branch 83 also intersect at the confluence 84. An inner pipe 811 connects to an inner pipe 841, an inner pipe 821 l 8 connects to an inner pipe 842, an inner pipe 831 connects to an inner pipe 843, and the inner pipes 841, 842, 843 are in communication.
A straight pipe cap 91 threads into a free end 812 of the first straight pipe 81 fluid-tightly. The straight pipe cap 91 includes an inner bottom surface 912, an outer bottom surface 914, an inner peripheral surface 913, an annular end 916 of an outer peripheral surface 915, and a fitting protrusion 911. The inner peripheral surface 913 is threaded. An outer peripheral surface 814 of the first straight pipe 81 is correspondingly threaded. When the straight pipe cap 91 starts threading into the free end 812 of the first straight pipe 81, the fitting protrusion 911 is inserted into the first straight pipe 81, the inner peripheral surface 813 of the first straight pipe 81 starts tightly contacting the outer peripheral surface of the fitting protrusion 911, and when the straight pipe cap 91 is further threaded into fluid-tightly, the free end 812 of the first straight pipe 81 and the inner bottom surface of the straight pipe cap 91 tightly contact each other.
A side branch cap 92 threads into a free end 832 of the side branch 83 fluid-tightly. The side branch cap 92 includes an inner bottom surface 922, an outer bottom surface 924, an inner peripheral surface 923, an outer peripheral surface 925, an annular end 926, and a fitting protrusion 921. The inner peripheral surface 923 is 9 - threaded. An outer peripheral surface 833 of the side branch 83 is correspondingly threaded. When the side branch cap 92 starts threading into the free end 832 of the side branch 83, the fitting protrusion 921 is inserted into the side branch 83, the outer peripheral surface 833 of the side branch 83 starts tightly contacting the outer peripheral surface of the fitting protrusion 921, and when the side branch cap 92 is further threaded into fluid-tightly, the free end 832 of the side branch 83 and the inner bottom surface 922 of the side branch cap 92 tightly contact each other.
An outer diameter of the second straight pipe is substantially constant, and the second straight pipe can be connected to an unshown tube by being fitted to an end of the tube or using an adhesive.
Preferably, the first straight pipe, the second straight pipe, the side branch, and the confluence are made of transparent resin. Transparent materials allow blood or a drug solution flowing in the inner pipes to be visible.
According to the first embodiment, after detaching the side branch cap 92, simply connecting a tube connected to a drug solution bag to the free end of the side branch causes the drug solution to be supplied to the first straight pipe 81, and disconnecting the tube stops the supply of the solution from the side branch.
Second embodiment (first aspect of the invention) - 10 FIG. 2 is a plan view of a side branch pipe according to a second embodiment. FIG. 3 is a front view of the side branch pipe according to the second embodiment.
Unlike the side branch pipe of the first embodiment, in the side branch pipe of the second embodiment, a side branch 83 has a thin portion 66 at a top of a side surface near a check valve 3, has a button 67, and has a flat portion 68 at a bottom. When a top surface of the button 67 is pressed with a finger with the flat portion 68 in tight contact with a patient's skin, the thin portion 66 is elastically dented and moves downwards.
Thus, a bottom surface of the thin portion 66 contacts the check valve 3, and a lateral force is applied to the check valve. Therefore, the valve body is deformed to open a slit and to allow backflow.
Preferably, the valve body is made of silicone rubber, urethane rubber, or plastic soft materials, and when a force is applied to the valve body to be elastically deformed, and then the force is removed by releasing the finger, the valve body returns to its original shape. A preferable elastic material has repeatability that allows returning to the original shape even after repeated application and removal of a force.
In the second embodiment, the valve body is in a "ruling pen" shape, and long sides of two flat plates at a tip are placed perpendicularly to the bottom of the side branch pipe. Usually, the long sides of the two flat plates tightly contact each other. However, when the button 67 is pressed with a finger, the thin portion 66 is flexed to press the valve body downwards, and the flat plates are flexed to be arcuate to leave a clearance between the two flat plates. Therefore, a fluid passes through the check valve 3. On the other hand, when pressing the button 67 is stopped, the valve body returns to its original shape, the two flat plates tightly contact each other, and the fluid cannot pass therebetween. Thus, even if a medical practitioner presses the side branch pipe with his/her finger while holding with one hand, the side branch pipe does not rotate and move, thereby allowing a stable and smooth operation.
In unshown another embodiment, a valve body is in a sack shape, and a tip thereof has a cross-shaped slit.
When a pressure acting on an inner surface of the valve body is not larger than a pressure acting on an outer surface, a check valve is usually closed. However, when a lateral force is applied to the valve body, the valve body is elastically deformed to leave a clearance at the slit to open the valve body. On the other hand, when application of the lateral force is stopped, the valve body returns to its original shape and is closed.
Third embodiment (first aspect of the invention) - 12 FIG. 4 is a plan view of a side branch pipe according to a third embodiment.
The third embodiment is substantially the same as the first embodiment except for a cap nut 93 being mounted to a second straight pipe 82 rotatably and somewhat movably along an axis. The cap nut 93 includes an annular bottom 931 having an inner diameter substantially identical to an outer diameter of the second straight pipe 82, and a side peripheral portion 933 vertically extending from an outer periphery of the annular bottom 931. An inner peripheral surface of the side peripheral portion 933 is threaded. Further, unlike the first embodiment, the second straight pipe 82 has a large diameter protrusion 822 at its centre. An outer diameter of the large diameter protrusion 822 is larger than an inner diameter of the annular bottom 931 of the cap nut 93, thus the cap nut 93 cannot move beyond the large diameter protrusion 822, but between a confluence 84 and the large diameter protrusion 822, an inner peripheral surface 932 of the annular bottom 931 can rotate and linearly move in contact with an outer peripheral surface of the second straight pipe 82.
Fourth embodiment (first aspect of the invention) FIG. 5 is a plan view of a side branch pipe according to a fourth embodiment, and FIG. 6 is a front view of the side branch pipe according to the fourth embodiment.
Like the second embodiment, in the fourth embodiment, a side branch 83 has a thin portion 66 at a top of a side surface near a check valve 3, has a button 67, and has a flat portion 68 at a bottom. Further, like the third embodiment, in the fourth embodiment, a second straight pipe 82 has a large diameter protrusion 822 at its centre, and a cap nut 93 is mounted to the second straight pipe 82.
Two or more valve assemblies of the third embodiment can be joined such that the second straight pipe of one assembly and the first straight pipe of a second assembly are arranged in a straight line to cause the cap nut of the second straight pipe to thread onto the outer peripheral surface of the first straight pipe.
Alternatively, the second straight pipe of one assembly and a side branch of a second assembly can be arranged in a straight line to cause the cap nut of the second straight pipe to thread onto the outer peripheral surface of the side branch. Likewise, two or more valve assemblies of the fourth embodiment, or a valve assembly of the third embodiment and a valve assembly of the fourth embodiment can be joined.
Fifth embodiment (second aspect of the invention) FIG. 7 is a plan view of a side branch pipe according to a fifth embodiment, and FIG. 8 is a front view of the side branch pipe according to a fifth embodiment. - 14
A first straight pipe 81 and a second straight pipe 82 are arranged on a line, a confluence 84 extends along the line and has three side branches 83 intersecting the line. The three side branches are parallel to each other and placed in the same direction with respect to the line in one plane.
Each side branch 83 has a thin portion and a button at part of a side surface near a check valve like the side branch pipe of the second embodiment or the side branch of the side branch pipe of the fourth embodiment, but the side branch 83 may have a structure simply including a check valve like the side branch pipe of the first embodiment or the side branch of the side branch pipe of the third embodiment.
For easy identification of each side branch 83, part of the side branch, a side branch cap, or both may be coloured for colour-coding.
The side branch pipe of the fourth embodiment allows drug solutions from various drug solution bags to be mixed to flow at the same time, facilitates switching, and prevents switching errors since each side branch can be quickly identified.
Modification of the fifth embodiment (second aspect of the invention) FIG. 9 is a schematic view of a modification of the fifth embodiment. In (a), three side branches 96 are in one plane, side branches 96a, 96c extend in the same - 15 direction with respect to a line connecting a first straight pipe 94 and a second straight pipe 95, while a side branch 96b extends in an opposite direction. Jam or entanglement of connected tubes can be prevented. In (b), side branches 96a, 96c among three side branches 96 are in one plane, but extend in opposite directions with respect to the line. The side branch 96b intersects the line and the side branch 96a, and is perpendicular to the plane. This prevents a mix-up between the side branches 96a, 96b, 96c.
Sixth embodiment (second aspect of the invention) FIG. 10 is a plan view of a side branch pipe according to a sixth embodiment, and FIG. 11 is a front view of the side branch pipe according to the sixth embodiment.
A straight pipe cap 91 and a side branch cap 92 are connected to a confluence 84 by a flexible wire 97 made of plastic, a fibre string, or metal. Connecting the straight pipe cap 91 and the side branch cap 92 to the confluence 84 by the wire 97 solves problems of loss of the straight pipe cap 91 and the side branch cap 92, or of taking time or trouble in finding them. The straight pipe cap 91 and the side branch cap 92 may be differently coloured, or may be coloured as the same as a straight pipe cap that threads into part of a corresponding straight pipe or a side branch cap that threads into part of a corresponding side branch. - 16
According to a preferred aspect of the invention, by simply connecting a tube to the side branch allows a fluid to flow from the tube to the confluence without backflow, and detaching the tube stops the flow of the fluid, thus current situations of connection or a flowing fluid can be quickly perceived, preventing operating errors to reduce the number of medical accidents.
According to a preferred aspect of the invention, the side branch pipe has a plurality of side branches protruding from the confluence, simply connecting a tube to each side branch allows a fluid to flow from the tube to the confluence without backflow, and detaching the tube stops the flow of the fluid, thus even if a plurality of drug solutions are administered to a patient at the same time or by switching, current situations of connection or a flowing fluid can be quickly perceived, preventing operating errors to reduce the number of medical accidents.
FIG. 12 is a plan view of a side branch pipe according to a seventh embodiment.
A side branch pipe includes a first straight pipe 81, a second straight pipe 82, a side branch 83, and a confluence 84. The first straight pipe 81 and the second straight pipe 82 are arranged on a line. The first straight pipe 81 and the side branch 83 intersect at the confluence 84. The second straight pipe 82 and the side branch 83 also intersect at the confluence 84. An inner - 17 pipe 811 connects to an inner pipe 841, an inner pipe 821 connects to an inner pipe 842, an inner pipe 831 connects to an inner pipe 843, and the inner pipes 841, 842, 843 are in communication.
A straight pipe cap 91 threads into a free end of the first straight pipe 81 fluid-tightly. The straight pipe cap 91 includes an inner bottom surface, an outer bottom surface 914, an inner peripheral surface, an outer peripheral surface, an annular end, and a fitting protrusion. The inner peripheral surface is threaded.
An outer peripheral surface of the first straight pipe 81 is correspondingly threaded. When the straight pipe cap 91 starts threading into the free end of the first straight pipe 81, the fitting protrusion is inserted into the first straight pipe 81, the inner peripheral surface of the first straight pipe 81 starts tightly contacting the outer peripheral surface of the fitting protrusion, and when the straight pipe cap 91 is further threaded into fluid-tightly, the free end of the first straight pipe 81 and the inner bottom surface of the straight pipe cap 91 tightly contact each other.
A side branch cap 92 threads into a free end of the side branch 83 fluidtightly. The side branch cap 92 includes an inner bottom surface, an outer bottom surface, an inner peripheral surface, an outer peripheral surface, an annular end, and a fitting protrusion. The inner peripheral surface is threaded. An outer - 18 peripheral surface of the side branch 83 is correspondingly threaded. When the side branch cap 92 starts threading into the free end of the side branch 83, the fitting protrusion is inserted into the side branch 83, the inner peripheral surface of the side branch 83 starts tightly contacting the outer peripheral surface of the fitting protrusion, and when the side branch cap 92 is further threaded into fluid-tight engagement, the free end of the side branch 83 and the inner bottom surface of the side branch cap 92 tightly contact each other. A check valve 3 is provided in the side branch, and passes a fluid from the free end of the side branch 83 to the confluence 84, but does not pass a fluid in a reverse direction. The side branch 83 has a thin portion 66 at a top of a side surface near the check valve 3, has a button 67, and has a flat portion at a bottom. When a top surface of the button 67 is pressed with a finger with the flat portion in tight contact with a patient's skin, the thin portion 66 is elastically dented and moves downwards. Thus, a bottom surface of the thin portion 66 contacts the check valve 3, and a lateral force is applied to the check valve. Therefore, the valve body 32 is deformed to open the slit and to allow backflow.
Preferably, the valve body is made of silicone rubber, urethane rubber, or plastic soft materials, and when a force is applied to the valve body to be elastically deformed, and then the force is removed by 1 1 - 19 releasing the finger, the valve body returns to its original shape. A preferable elastic material has repeatability that allows returning to the original shape even after repeated application and removal of a force.
In this embodiment, the valve body 32 is in a "ruling pen" shape, and long sides of two flat plates at a tip are placed perpendicularly to the bottom of the side branch pipe. Usually, the long sides of the two flat plates tightly contact each other. However, when the button 67 is pressed with a finger, the thin portion 66 is flexed to press the valve body 32 downwards, and the flat plates are flexed to be arcuate to leave a clearance between the two flat plates. Therefore, a fluid passes through the check valve 3. On the other hand, when pressing the button 67 is stopped, the valve body 32 returns to its original shape, the two flat plates tightly contact each other, and the fluid cannot pass therebetween. Thus, even if a medical practitioner presses the side branch pipe with his/her finger while holding with one hand, the side branch pipe does not rotate and move, thereby allowing a stable and smooth operation.
A fluorescent adhesive sheet 99 is affixed to the button 67, a top surface of the fluorescent adhesive sheet 99 being coated with fluorescent paint and a rear surface thereof being coated with an adhesive. -
The fluorescent adhesive sheet is in the shape of a target with concentric circles, a circle, a star, a heart, a triangle, a rectangle, or an arrow. t - 21

Claims (10)

1. A medical valve assembly comprising a first straight pipe and a second straight pipe arranged in a line, and one or more side branches intersecting the first straight pipe and the second straight pipe at a confluence where the pipes and branches communicate with each other, wherein at least one side branch has a check valve therein such that a fluid and a gas from a free end of the side branch to the confluence pass, but a fluid and a gas from the confluence to the free end are blocked and do not flow.
2. The medical valve assembly as claimed in claim 1, wherein part of a side surface of the side branch near the check valve is a flexible portion made of an elastic material, and when the flexible portion is not pressed, a fluid or a gas from a free end of the side branch to the confluence pass, but a fluid and a gas from the confluence to the free end are blocked and do not flow, while when the flexible portion is pressed, the fluid or the gas pass from the confluence to the free end.
3. The medical valve assembly according to claim 2, further comprising a pressing tool capable of keeping the flexible portion pressed and releasing the press. - 2
4. The medical valve assembly according to any one of claims 1 to 3, wherein the check valve comprises: a valve holder that has a tapered pipe, and a small diameter pipe connecting to a small diameter opening of the tapered pipe and extending outwards, a large diameter opening of the tapered pipe being fluid-tightly fitted to an inner surface of a side branch; and a flexible valve body that is fitted to an outer peripheral surface of the small diameter pipe of the valve holder, and has a slit that is opened by a fluid pressure from a large diameter opening side of the tapered pipe, or by a lateral pressure, but closed by a fluid pressure from a small diameter pipe side.
5. The medical valve assembly according to any one of claims 1 to 4, further comprising a detachable side branch cap that is capable of closing a free end of at least one side branch.
6. The medical valve assembly according to any one of claims 1 to 5, further comprising a detachable straight pipe cap that is capable of closing a free end of the first straight pipe.
7. The medical valve assembly according to any one of claims 1 to 6, wherein the second straight pipe comprises - 23 a detachable straight pipe cap nut that is fluid-tightly connectable to the first straight pipe of the medical side branch pipe according to claim 6.
8. The medical valve assembly according to any one of claims 1 to 7, wherein the second straight pipe comprises a detachable cap nut that is fluid-tightly connectable to the side branch of the medical side branch pipe according to any one of claims 1 to 7.
9. The medical valve assembly according to claim 2, wherein the flexible portion is coloured, or coated with fluorescent paint, or a colour tape or a fluorescent paint tape is affixed to the flexible portion.
10. The medical valve assembly according to claims 3, wherein a material for the pressing tool contains fluorescent paint, or the pressing tool is coloured, or coated with the fluorescent paint, or a colour tape, a fluorescent paint tape, or a reflection sheet is affixed to the pressing tool.
GB0513476A 2002-10-15 2003-03-05 Medical Valve Assembly Withdrawn GB2414678A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2002300049A JP2004129981A (en) 2002-10-15 2002-10-15 Medical branch tubes used for medical treatment of human or animal
JP2002370104A JP2004195078A (en) 2002-12-20 2002-12-20 Medical implement and animal treatment implement
GB0304986A GB2387333B (en) 2002-03-07 2003-03-05 Outer needle device of a catheter

Publications (2)

Publication Number Publication Date
GB0513476D0 GB0513476D0 (en) 2005-08-10
GB2414678A true GB2414678A (en) 2005-12-07

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009040852A1 (en) * 2007-09-07 2009-04-02 Dario Petrone Device suitable for administering mutually incompatible liquid substances into the human body
FR2923393A1 (en) * 2007-11-12 2009-05-15 Doran Internat Sarl DEVICE FOR ADMINISTERING MULTIPLE MEDICAL TREATMENT LIQUIDS TO A PATIENT
EP2813254A1 (en) * 2013-06-13 2014-12-17 UMC Utrecht Holding B.V. Apparatus for simultaneous multiple medicine administration
US20190388674A1 (en) * 2017-03-22 2019-12-26 Nikkiso Company Limited Medical connector

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GB1529742A (en) * 1975-01-24 1978-10-25 Stille Werner Ab Liquid coupling assembly
GB2050578A (en) * 1979-05-10 1981-01-07 Mallinckrodt Inc Suction catheter control valve
GB2056284A (en) * 1979-07-25 1981-03-18 Technological Supply Connector for discontinuous injections into a perfusion line
US4871353A (en) * 1987-06-24 1989-10-03 John Thomsen Method and apparatus for injecting fluids into IV line
WO1995015104A1 (en) * 1993-12-01 1995-06-08 Ring Can Corporation Container having no-glug pouring spout
WO2000027452A1 (en) * 1998-11-06 2000-05-18 Critical Device Corporation Manifold with one-way needleless injection site
US6461335B1 (en) * 2000-02-28 2002-10-08 Sherwood Services, Ag Tube dependent anti-free-flow valve

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1529742A (en) * 1975-01-24 1978-10-25 Stille Werner Ab Liquid coupling assembly
GB2050578A (en) * 1979-05-10 1981-01-07 Mallinckrodt Inc Suction catheter control valve
GB2056284A (en) * 1979-07-25 1981-03-18 Technological Supply Connector for discontinuous injections into a perfusion line
US4871353A (en) * 1987-06-24 1989-10-03 John Thomsen Method and apparatus for injecting fluids into IV line
WO1995015104A1 (en) * 1993-12-01 1995-06-08 Ring Can Corporation Container having no-glug pouring spout
WO2000027452A1 (en) * 1998-11-06 2000-05-18 Critical Device Corporation Manifold with one-way needleless injection site
US6461335B1 (en) * 2000-02-28 2002-10-08 Sherwood Services, Ag Tube dependent anti-free-flow valve

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009040852A1 (en) * 2007-09-07 2009-04-02 Dario Petrone Device suitable for administering mutually incompatible liquid substances into the human body
FR2923393A1 (en) * 2007-11-12 2009-05-15 Doran Internat Sarl DEVICE FOR ADMINISTERING MULTIPLE MEDICAL TREATMENT LIQUIDS TO A PATIENT
WO2009068806A3 (en) * 2007-11-12 2009-09-17 Doran International Device for delivering a plurality of medical treatment liquids to a human or animal patient
US8257301B2 (en) 2007-11-12 2012-09-04 Philippe Buisson Device for administering several liquid medicines to a patient
EP2813254A1 (en) * 2013-06-13 2014-12-17 UMC Utrecht Holding B.V. Apparatus for simultaneous multiple medicine administration
US20190388674A1 (en) * 2017-03-22 2019-12-26 Nikkiso Company Limited Medical connector
US11633585B2 (en) * 2017-03-22 2023-04-25 Nikkiso Company Limited Medical connector

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