WO2003043682A2 - Floater flowmeter intravenous line - Google Patents

Floater flowmeter intravenous line Download PDF

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Publication number
WO2003043682A2
WO2003043682A2 PCT/BE2002/000175 BE0200175W WO03043682A2 WO 2003043682 A2 WO2003043682 A2 WO 2003043682A2 BE 0200175 W BE0200175 W BE 0200175W WO 03043682 A2 WO03043682 A2 WO 03043682A2
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WO
WIPO (PCT)
Prior art keywords
infusion
float
measuring tube
liquid
tube
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Application number
PCT/BE2002/000175
Other languages
French (fr)
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WO2003043682A3 (en
Inventor
Luc Pichotte
Pascal Mawet
Luc Weyens
Original Assignee
BERIA société anonyme
Cewac Asbl
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.)
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Publication date
Application filed by BERIA société anonyme, Cewac Asbl filed Critical BERIA société anonyme
Priority to AU2002364781A priority Critical patent/AU2002364781A1/en
Publication of WO2003043682A2 publication Critical patent/WO2003043682A2/en
Publication of WO2003043682A3 publication Critical patent/WO2003043682A3/en

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Classifications

    • 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
    • A61M5/168Means 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
    • A61M5/16886Means 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 for measuring fluid flow rate, i.e. flowmeters

Definitions

  • the present invention relates to an improved infusion line, intended to be supplied with pressurized infusion liquid. More particularly, the infusion line of the invention is supplied by a flexible pouch pressurized by appropriate means.
  • the invention also relates to a float flow meter, also called a rotameter, intended to equip such a perfusion line.
  • perfusion operations are generally carried out by means of an infusion liquid flowing by gravity from a pouch, generally flexible, placed at a sufficient height.
  • a pouch In hospitals, the pouch is generally suspended from a bracket, possibly mobile.
  • emergency medicine for example in the event of an accident, the pouch is often held at arm's length by intervention personnel.
  • the infusion rate is an important parameter of the operation.
  • the infusion liquid is delivered by a dropper whose flow rate, measured by the number of drops flowing per unit of time, is adjusted by means of a thumb clamp .
  • an autonomous perfusion device of this type offers great ease of use in the most diverse circumstances, eliminating the need to maintain the flexible pouch at a determined height.
  • the object of the present invention is to meet this need. With an perfusion line perfected in accordance with the invention, it is possible to determine in a simple manner the flow rate of the perfusion liquid, which is supplied under pressure from a flexible pouch, itself pressurized by suitable means .
  • an infusion line supplied with pressurized infusion liquid which comprises a flexible hose to be connected on the one hand to a source of pressurized infusion liquid and on the other hand to an infusion element, said flexible hose being provided with a member for varying the flow rate of the perfusion liquid, is characterized in that it comprises means for measuring said flow rate inserted into said flexible hose.
  • said means for measuring the flow rate are inserted into said flexible pipe before the flow rate variation member, with respect to the direction of flow of the perfusion liquid.
  • any means of flow measurement could be inserted into said flexible pipe.
  • a float flow meter also called a rotameter, in series in the flexible pipe.
  • Float flow meters are devices for measuring the flow of fluids, liquids or gases, well known in the art. It is therefore not necessary to give a detailed description here.
  • a float flow meter consists essentially of a graduated conical tube, in which a float can move under the action of the thrust exerted by the pressurized fluid introduced into the tube through the small diameter end.
  • the inlet at the bottom the ball stabilizes at a level which, by means of a graduated scale, gives the measurement of this flow.
  • the measuring tube is generally made of glass. In the event of an impact or a fall, it may therefore break or present splinters which make it unusable. In addition, its size and weight are important. Furthermore, its manufacturing cost is relatively high; for economic reasons, it must therefore be used repeatedly. Therefore, it must be thoroughly cleaned and repackaged in sterile packaging before each new use, which also involves significant costs.
  • a float flow meter intended to be inserted into a pressure infusion line, consists of a synthetic material inert with respect to the infusion liquid.
  • said float flow meter in a butadiene-styrene polymer, preferably of the K-Resin, ABS or similar type.
  • the measurement tube of the float flow meter is provided, at its large diameter end, with a closure plug which is put in place after the introduction of the ball into the tube.
  • This closure plug is preferably made of the same synthetic material as the actual measurement tube, namely a butadiene-styrene polymer, preferably of the K-Resin type.
  • the assembly between the measuring tube and the closure plug can be carried out by any suitable method, possibly known per se.
  • the closure cap is assembled, without adding material, to the measurement tube in a particularly advantageous, simple and rapid manner.
  • the measurement tube carries, near its large diameter end, an external flange provided, in its end face, with a projecting annular portion surrounding the central passage of the measurement tube, said projection forming an outer annular shoulder along the periphery of the flange and an inner annular shoulder along the periphery of the central passage;
  • the closure cap comprises a tubular end piece carrying, at one end, an external flange provided, in its end face, with an annular groove corresponding to said annular projection of the measuring tube; the closing plug is placed on the measuring tube so that the annular groove of the closing plug is fitted onto the annular projection of the measuring tube; and the assembly of the closure cap with the measuring tube is sealed by high frequency ultrasonic welding. 5
  • a labyrinth seal is thus formed, which ensures a perfect seal between the measuring tube and the closure cap.
  • this assembly does not require the use of glue, which could pollute the infusion liquid.
  • the aforementioned synthetic material, used to manufacture the measuring tube and the closure plug of the float flow meter, has moreover several properties which are advantageous for the present application: it is transparent, which makes it possible to easily observe the position of the ball in the measuring tube; 15 - it resists mechanical shock, falls, any rough handling; it can be used in a temperature range from 0 ° C to + 45 ° C; it can be stored at temperatures from - 15 ° C to + 45 ° C; it withstands relative humidity from 40% to 100%; it can be sterilized, in particular with ethylene oxide or gamma rays. 20
  • the ball which constitutes the float must be made of a material that is inert with respect to the infusion liquid. In addition, it must have a specific weight greater than that of the infusion liquid.
  • the float consists of a glass or stainless steel ball.
  • the geometric characteristics of the measuring tube and the ball are chosen according to the range of infusion liquid flow rates desired. 30
  • the range of infusion liquid flow rates extends from 10 ml / h to 18 l / h.
  • the float flow meter has the following geometric characteristics:
  • the flexible hoses are made of a synthetic material, preferably transparent, in particular PVC or DHEP.
  • the flexible pipes advantageously have an inside diameter of 3 mm and an outside diameter of 4 mm.
  • the infusion line constituted as described above is finally sterilized and packaged in sterile packaging. Due to its low cost, it is for single use, which also eliminates the additional costs mentioned above.
  • Fig. 1 represents an infusion line comprising a float flow meter, in accordance with the invention
  • Fig. 2 shows the assembly of the measuring tube and the closure plug of the float flow meter.
  • an infusion line comprising, in a manner known per se, a flexible tube 1, the ends of which are provided with suitable means for connection to a source of perfusion liquid under pressure on the one hand and to an infusion set, such as a needle or catheter, on the other hand.
  • the flexible tube 1 is also provided, near its outlet end, with a thumbwheel clamp 2 making it possible to vary the flow rate of the perfusion liquid.
  • the perfusion line further comprises a float flow meter 3, which is inserted in series in the flexible pipe 1.
  • This float flow meter 3 consists of a conical measuring tube 4, in which is housed a ball 5 constituting the float.
  • the float flow meter 3 is connected to the inlet, through its small diameter end do, to the source of infusion liquid (fitting 1.1), and the outlet, through its other end, to the infusion element (fitting 1.2).
  • the measurement tube 4 is closed by a plug 6 having a tubular end piece for connecting the flexible pipe.
  • the measurement tube 4 carries an external flange 7, the end face of which has a projecting annular portion 8, which forms external annular shoulders 9 and interior 10.
  • the plug 6 comprises a tubular end piece 11 carrying an end flange 12 provided, in its end face, with an annular groove 13 intended to fit onto the projecting annular portion 8. The two parts 4 and 6 are shown in FIG. 2 before their assembly.
  • the float flow meter 3, namely the conical measurement tube 4 and the closure plug 6, is made of a butadiene-styrene polymer of the K-Resin type.
  • the float 5 is constituted by a glass ball.
  • the infusion line according to the invention is packaged in sterile packaging. It is for single use only.
  • the mode of use of an improved infusion line according to the invention is as follows. Firstly, the end 1.1 of the flexible pipe 1 is connected to a source of pressurized perfusion liquid, not shown here.
  • This source of pressurized perfusion liquid is preferably a flexible pouch pressurized by means of an autonomous perfusion device described for example in Belgian patent application BE-A-2000/0600. In this regard, it should be recalled that this autonomous perfusion device does not require a suspension bracket.
  • the end 1.2 of the flexible pipe 1 is then connected to the perfusion element, also not shown. With the float flow meter 3 kept in a vertical position, with the inlet down, the flow rate of the infusion liquid is varied by means of the thumbwheel clamp 2, until the ball 5 reaches into the measuring tube. conical 4, the position corresponding to the desired liquid flow rate. The flow is thus adjusted and the float flow meter 3 can now be in any position without affecting the liquid flow.

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  • Health & Medical Sciences (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Vascular Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)
  • Measuring Volume Flow (AREA)

Abstract

The invention concerns an intravenous line fed with perfusion liquid under pressure, comprising a flexible pipe (1) to be connected, with appropriate means (1.1, 1.2) to a source of perfusion liquid under pressure and to a perfusion element, said flexible pipe (1) being provided with a member (2) for varying the flow rate of the perfusion liquid. The invention is characterized in that said intravenous line comprises means (3) for measuring the flow rate of the perfusion liquid, inserted in said flexible pipe (1). The measuring means (3) preferably comprise a float flowmeter (rotameter), whereof the measuring tube (4), the closure cap (6) are made of synthetic material inert relative to the perfusion liquid. Said intravenous line can be sterilized for example with ethylene oxide or gamma rays, and is disposable.

Description

Ligne de perfusion perfectionnée et débitmètre à flotteur pour une ligne de perfusion Advanced perfusion line and float flow meter for an infusion line
DESCRIPTIONDESCRIPTION
Domaine techniqueTechnical area
La présente invention concerne une ligne de perfusion perfectionnée, destinée à être alimentée en liquide de perfusion sous pression. Plus particulièrement, la ligne de perfusion de l'invention est alimentée par une pochette souple mise sous pression par des moyens appropriés. L'invention porte également sur un débitmètre à flotteur, appelé aussi rotamètre, destiné à équiper une telle ligne de perfusion.The present invention relates to an improved infusion line, intended to be supplied with pressurized infusion liquid. More particularly, the infusion line of the invention is supplied by a flexible pouch pressurized by appropriate means. The invention also relates to a float flow meter, also called a rotameter, intended to equip such a perfusion line.
Etat de la techniqueState of the art
Actuellement, les opérations de perfusion sont en général effectuées au moyen d'un liquide de perfusion s'écoulant par gravité à partir d'une pochette, généralement souple, placée à une hauteur suffisante. En milieu hospitalier, la pochette est généralement suspendue à une potence, éventuellement mobile. En médecine d'urgence, par exemple en cas d'accident, la pochette est souvent maintenue à bout de bras par du personnel d'intervention.Currently, perfusion operations are generally carried out by means of an infusion liquid flowing by gravity from a pouch, generally flexible, placed at a sufficient height. In hospitals, the pouch is generally suspended from a bracket, possibly mobile. In emergency medicine, for example in the event of an accident, the pouch is often held at arm's length by intervention personnel.
A côté de la nature du liquide de perfusion, le débit de perfusion constitue un paramètre important de l'opération.Besides the nature of the infusion liquid, the infusion rate is an important parameter of the operation.
Dans les lignes de perfusion conventionnelles, rappelées plus haut, le liquide de perfusion est délivré par un compte-gouttes dont le débit, mesure par le nombre de gouttes s'écoulant par unité de temps, est réglé au moyen d'un clamp à molette.In the conventional infusion lines, mentioned above, the infusion liquid is delivered by a dropper whose flow rate, measured by the number of drops flowing per unit of time, is adjusted by means of a thumb clamp .
Cette méthode de mesure du débit n'est cependant pas applicable dans le cas d'une ligne de perfusion, dans laquelle l'écoulement du liquide de perfusion est assuré par la pression exercée sur la pochette souple au moyen d'un appareil approprié, tel que celui qui fait l'objet de la demande de brevet belge BE-A-2000/0600 des mêmes demandeurs.This flow measurement method is however not applicable in the case of an infusion line, in which the flow of the infusion liquid is ensured by the pressure exerted on the flexible pouch by means of an appropriate device, such as that which is the subject of Belgian patent application BE-A-2000/0600 from the same applicants.
Comme cela est exposé en détail dans la demande de brevet précitée, un dispositif autonome de perfusion de ce type offre une grande facilité d'utilisation dans les circonstances les plus diverses, supprimant la nécessité de maintenir la pochette souple à une hauteur déterminée.As described in detail in the aforementioned patent application, an autonomous perfusion device of this type offers great ease of use in the most diverse circumstances, eliminating the need to maintain the flexible pouch at a determined height.
Il existe dès lors un besoin réel de disposer d'une ligne de perfusion utilisable avec un dispositif autonome de perfusion et garantissant la fiabilité indispensable dans le domaine des soins médicaux.There is therefore a real need for an infusion line which can be used with an autonomous infusion device and which guarantees the essential reliability in the field of medical care.
Présentation de l'inventionPresentation of the invention
La présente invention a pour objet de répondre à ce besoin. Avec une ligne de perfusion perfectionnée conformément à l'invention, il est possible de déterminer de façon simple le débit du liquide de perfusion, qui est fourni sous pression à partir d'une pochette souple, elle-même mise sous pression par des moyens appropriés.The object of the present invention is to meet this need. With an perfusion line perfected in accordance with the invention, it is possible to determine in a simple manner the flow rate of the perfusion liquid, which is supplied under pressure from a flexible pouch, itself pressurized by suitable means .
Conformément à l'invention, une ligne de perfusion alimentée en liquide de perfusion sous pression, qui comprend un tuyau souple à raccorder d'une part à une source de liquide de perfusion sous pression et d'autre part à un élément de perfusion, ledit tuyau souple étant muni d'un organe de variation du débit du liquide de perfusion, est caractérisée en ce qu'elle comporte des moyens de mesure dudit débit insérés dans ledit tuyau souple.According to the invention, an infusion line supplied with pressurized infusion liquid, which comprises a flexible hose to be connected on the one hand to a source of pressurized infusion liquid and on the other hand to an infusion element, said flexible hose being provided with a member for varying the flow rate of the perfusion liquid, is characterized in that it comprises means for measuring said flow rate inserted into said flexible hose.
Suivant une forme de réalisation préférée, lesdits moyens de mesure du débit sont insérés dans ledit tuyau souple avant l'organe de variation du débit, par rapport au sens d'écoulement du liquide de perfusion.According to a preferred embodiment, said means for measuring the flow rate are inserted into said flexible pipe before the flow rate variation member, with respect to the direction of flow of the perfusion liquid.
En principe, on pourrait insérer dans ledit tuyau souple n'importe quels moyens de mesure de débit. Il s'est cependant avéré particulièrement avantageux de monter en série dans le tuyau souple un débitmètre à flotteur, aussi appelé rotamètre.In principle, any means of flow measurement could be inserted into said flexible pipe. However, it has been found to be particularly advantageous to mount a float flow meter, also called a rotameter, in series in the flexible pipe.
Les débitmètres à flotteur sont des dispositifs de mesure de débit de fluides, liquides ou gazeux, bien connus dans la technique. Il n'est dès lors pas nécessaire d'en donner ici une description détaillée.Float flow meters are devices for measuring the flow of fluids, liquids or gases, well known in the art. It is therefore not necessary to give a detailed description here.
On rappellera brièvement qu'un débitmètre à flotteur se compose essentiellement d'un tube conique gradué, dans lequel un flotteur peut se déplacer sous l'action de la poussée exercée par le fluide sous pression introduit dans le tube par l'extrémité de petit diamètre. Pour un débit constant et avec le tube en position verticale, l'entrée en bas, la bille se stabilise à un niveau qui, au moyen d'une échelle graduée, donne la mesure de ce débit.It will be recalled briefly that a float flow meter consists essentially of a graduated conical tube, in which a float can move under the action of the thrust exerted by the pressurized fluid introduced into the tube through the small diameter end. For a constant flow and with the tube in vertical position, the inlet at the bottom, the ball stabilizes at a level which, by means of a graduated scale, gives the measurement of this flow.
Les rotamètres connus ne se prêtent cependant pas à une utilisation dans une ligne de perfusion sous pression, susceptible d'être employée dans des situations d'urgence. En effet, le tube de mesure est généralement fabriqué en verre. En cas de choc ou de chute, il peut dès lors se briser ou présenter des éclats qui le rendent inutilisable. En outre, son encombrement et son poids sont importants. Par ailleurs, son coût de fabrication est relativement élevé; pour des raisons économiques, il doit dès lors être utilisé à plusieurs reprises. De ce fait, il doit être nettoyé soigneusement et reconditionné dans un emballage stérile avant chaque nouvelle utilisation, ce qui entraîne également des frais importants.Known rotameters, however, are not suitable for use in a pressure infusion line, which can be used in emergency situations. In fact, the measuring tube is generally made of glass. In the event of an impact or a fall, it may therefore break or present splinters which make it unusable. In addition, its size and weight are important. Furthermore, its manufacturing cost is relatively high; for economic reasons, it must therefore be used repeatedly. Therefore, it must be thoroughly cleaned and repackaged in sterile packaging before each new use, which also involves significant costs.
Suivant l'invention, un débitmètre à flotteur, destiné à être inséré dans une ligne de perfusion sous pression, est constitué d'une matière synthétique inerte par rapport au liquide de perfusion.According to the invention, a float flow meter, intended to be inserted into a pressure infusion line, consists of a synthetic material inert with respect to the infusion liquid.
A cet égard, il s'est avéré particulièrement avantageux de réaliser ledit débitmètre à flotteur en un polymère de butadiène-styrène, de préférence de type K-Resin, ABS ou analogue.In this regard, it has proved particularly advantageous to produce said float flow meter in a butadiene-styrene polymer, preferably of the K-Resin, ABS or similar type.
De façon connue en soi, le tube de mesure du débitmètre à flotteur est muni, à son extrémité de grand diamètre, d'un bouchon de fermeture qui est mis en place après l'introduction de la bille dans le tube.In a manner known per se, the measurement tube of the float flow meter is provided, at its large diameter end, with a closure plug which is put in place after the introduction of the ball into the tube.
Ce bouchon de fermeture est de préférence constitué de la même matière synthétique que le tube de mesure proprement dit, à savoir un polymère de butadiène-styrène, de préférence de type K-Resin.This closure plug is preferably made of the same synthetic material as the actual measurement tube, namely a butadiene-styrene polymer, preferably of the K-Resin type.
L'assemblage entre le tube de mesure et le bouchon de fermeture peut être réalisé par toute méthode appropriée, éventuellement connue en soi.The assembly between the measuring tube and the closure plug can be carried out by any suitable method, possibly known per se.
Suivant l'invention, le bouchon de fermeture est assemblé, sans apport de matière, au tube de mesure d'une façon particulièrement intéressante, simple et rapide.According to the invention, the closure cap is assembled, without adding material, to the measurement tube in a particularly advantageous, simple and rapid manner.
A cet effet, le tube de mesure porte, à proximité de son extrémité de grand diamètre, une bride externe pourvue, dans sa face d'extrémité, d'une portion annulaire en saillie entourant le passage central du tube de mesure, ladite saillie formant un épaulement annulaire extérieur le long de la périphérie de la bride et un épaulement annulaire intérieur le long de la périphérie du passage central; le bouchon de fermeture comprend un embout tubulaire portant, à une extrémité, une bride externe pourvue, dans sa face d'extrémité, d'une rainure annulaire correspondant à ladite saillie annulaire du tube de mesure; le bouchon de fermeture est posé sur le tube de mesure de telle sorte que la rainure annulaire du bouchon de fermeture soit emboîtée sur la saillie annulaire du tube de mesure; et l'assemblage du bouchon de fermeture avec le tube de mesure est scellé par soudage aux ultrasons à haute fréquence. 5To this end, the measurement tube carries, near its large diameter end, an external flange provided, in its end face, with a projecting annular portion surrounding the central passage of the measurement tube, said projection forming an outer annular shoulder along the periphery of the flange and an inner annular shoulder along the periphery of the central passage; the closure cap comprises a tubular end piece carrying, at one end, an external flange provided, in its end face, with an annular groove corresponding to said annular projection of the measuring tube; the closing plug is placed on the measuring tube so that the annular groove of the closing plug is fitted onto the annular projection of the measuring tube; and the assembly of the closure cap with the measuring tube is sealed by high frequency ultrasonic welding. 5
Il se forme ainsi un joint à labyrinthe, qui assure une étanchéité parfaite entre le tube de mesure et le bouchon de fermeture. En outre, cet assemblage ne nécessite pas l'emploi de colle, qui pourrait polluer le liquide de perfusion.A labyrinth seal is thus formed, which ensures a perfect seal between the measuring tube and the closure cap. In addition, this assembly does not require the use of glue, which could pollute the infusion liquid.
10 La matière synthétique précitée, utilisée pour fabriquer le tube de mesure et le bouchon de fermeture du débitmètre à flotteur, possède par ailleurs plusieurs propriétés intéressantes pour la présente application: elle est transparente, ce qui permet d'observer aisément la position de la bille dans le tube de mesure; 15 - elle résiste aux chocs mécaniques, aux chutes, à d'éventuelles manipulations brusques; elle peut être utilisée dans une gamme de températures de 0°C à + 45°C; elle peut être stockée à des températures de - 15°C à + 45°C; elle résiste à une humidité relative de 40 % à 100 %; elle peut être stérilisée, en particulier à l'oxyde d'éthylène ou aux rayons gamma. 20The aforementioned synthetic material, used to manufacture the measuring tube and the closure plug of the float flow meter, has moreover several properties which are advantageous for the present application: it is transparent, which makes it possible to easily observe the position of the ball in the measuring tube; 15 - it resists mechanical shock, falls, any rough handling; it can be used in a temperature range from 0 ° C to + 45 ° C; it can be stored at temperatures from - 15 ° C to + 45 ° C; it withstands relative humidity from 40% to 100%; it can be sterilized, in particular with ethylene oxide or gamma rays. 20
Au même titre que le tube de mesure et le bouchon de fermeture, la bille qui constitue le flotteur doit être réalisée en une matière inerte par rapport au liquide de perfusion. Elle doit en outre présenter un poids spécifique supérieur à celui du liquide de perfusion.Like the measuring tube and the closure cap, the ball which constitutes the float must be made of a material that is inert with respect to the infusion liquid. In addition, it must have a specific weight greater than that of the infusion liquid.
25 Selon une forme de réalisation préférée, le flotteur est constitué par une bille en verre ou en acier inoxydable.According to a preferred embodiment, the float consists of a glass or stainless steel ball.
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Les caractéristiques géométriques du tube de mesure et de la bille sont choisies en fonction de la gamme de débits de liquide de perfusion désirée. 30The geometric characteristics of the measuring tube and the ball are chosen according to the range of infusion liquid flow rates desired. 30
Dans le cadre de l'application envisagée ici, la gamme de débits de liquide de perfusion s'étend de 10 ml/h à 18 l/h.In the context of the application envisaged here, the range of infusion liquid flow rates extends from 10 ml / h to 18 l / h.
Pour la gamme de débits précitée, le débitmètre à flotteur présente les caractéristiques 35 géométriques suivantes:For the aforementioned range of flow rates, the float flow meter has the following geometric characteristics:
diamètre inférieur utile du tube de mesure (do): 3,1 mm à 6,3 mm; conicité du tube de mesure: 0,45 % à 1 %; longueur utile du tube de mesure (L): 60 mm à 80 mm; diamètre de la bille: 3 mm à 6 mm.useful lower diameter of the measuring tube (do): 3.1 mm to 6.3 mm; taper of the measuring tube: 0.45% to 1%; working length of the measuring tube (L): 60 mm to 80 mm; diameter of the ball: 3 mm to 6 mm.
En ce qui concerne la ligne de perfusion, les tuyaux souples sont fabriqués en une matière synthétique, de préférence transparente, en particulier du PVC ou du DHEP. Les tuyaux souples ont avantageusement un diamètre intérieur de 3 mm et un diamètre extérieur de 4 mm.Regarding the infusion line, the flexible hoses are made of a synthetic material, preferably transparent, in particular PVC or DHEP. The flexible pipes advantageously have an inside diameter of 3 mm and an outside diameter of 4 mm.
La ligne de perfusion constituée comme décrit plus haut est finalement stérilisée et conditionnée sous un emballage stérile. En raison de son faible coût, elle est à usage unique, ce qui supprime en outre les frais additionnels évoqués plus haut.The infusion line constituted as described above is finally sterilized and packaged in sterile packaging. Due to its low cost, it is for single use, which also eliminates the additional costs mentioned above.
Brève description des dessinsBrief description of the drawings
L'invention sera à présent décrite plus en détail ci-dessous à l'aide d'un exemple de réalisation, en faisant référence aux dessins annexés dans lesquels laThe invention will now be described in more detail below with the aid of an embodiment, with reference to the accompanying drawings in which the
Fig. 1 représente une ligne de perfusion comportant un débitmètre à flotteur, conformément à l'invention; et la Fig. 2 montre l'assemblage du tube de mesure et du bouchon de fermeture du débitmètre à flotteur.Fig. 1 represents an infusion line comprising a float flow meter, in accordance with the invention; and Fig. 2 shows the assembly of the measuring tube and the closure plug of the float flow meter.
Ces figures ne sont que des représentations schématiques, sans échelle particulière, dans lesquelles on n'a reproduit que les éléments nécessaires à une bonne compréhension de l'invention.These figures are only schematic representations, without any particular scale, in which only the elements necessary for a good understanding of the invention have been reproduced.
Réalisation préférée de l'inventionPreferred embodiment of the invention
Dans la figure 1, on a représenté une ligne de perfusion comprenant, de façon connue en soi, un tuyau souple 1, dont les extrémités sont munies de moyens appropriés de raccordement à une source de liquide de perfusion sous pression d'une part et à un élément de perfusion, comme une aiguille ou un cathéter, d'autre part. Le tuyau souple 1 est encore muni, à proximité de son extrémité de sortie, d'un clamp à molette 2 permettant de faire varier le débit du liquide de perfusion.In Figure 1, there is shown an infusion line comprising, in a manner known per se, a flexible tube 1, the ends of which are provided with suitable means for connection to a source of perfusion liquid under pressure on the one hand and to an infusion set, such as a needle or catheter, on the other hand. The flexible tube 1 is also provided, near its outlet end, with a thumbwheel clamp 2 making it possible to vary the flow rate of the perfusion liquid.
Jusqu'ici, la ligne de perfusion est bien connue dans la technique. Suivant la présente invention, la ligne de perfusion comprend en outre un débitmètre à flotteur 3, qui est inséré en série dans le tuyau souple 1. Ce débitmètre à flotteur 3 est constitué d'un tube de mesure conique 4, dans lequel est logée une bille 5 constituant le flotteur. Le débitmètre à flotteur 3 est raccordé à l'entrée, par son extrémité de petit diamètre do, à la source de liquide de perfusion (raccord 1.1), et à la sortie, par son autre extrémité, à l'élément de perfusion (raccord 1.2).Heretofore, the infusion line is well known in the art. According to the present invention, the perfusion line further comprises a float flow meter 3, which is inserted in series in the flexible pipe 1. This float flow meter 3 consists of a conical measuring tube 4, in which is housed a ball 5 constituting the float. The float flow meter 3 is connected to the inlet, through its small diameter end do, to the source of infusion liquid (fitting 1.1), and the outlet, through its other end, to the infusion element (fitting 1.2).
A son extrémité de sortie, le tube de mesure 4 est fermé par un bouchon 6 présentant un embout tubulaire pour le raccordement du tuyau souple. Le tube de mesure 4 porte une bride externe 7, dont la face d'extrémité présente une portion annulaire en saillie 8, qui forme des épaulements annulaires extérieur 9 et intérieur 10. Le bouchon 6 comprend un embout tubulaire 11 portant une bride d'extrémité 12 pourvue, dans sa face d'extrémité, d'une rainure annulaire 13 destinée à s'emboîter sur la portion annulaire en saillie 8. Les deux parties 4 et 6 sont représentées dans la figure 2 avant leur assemblage.At its outlet end, the measurement tube 4 is closed by a plug 6 having a tubular end piece for connecting the flexible pipe. The measurement tube 4 carries an external flange 7, the end face of which has a projecting annular portion 8, which forms external annular shoulders 9 and interior 10. The plug 6 comprises a tubular end piece 11 carrying an end flange 12 provided, in its end face, with an annular groove 13 intended to fit onto the projecting annular portion 8. The two parts 4 and 6 are shown in FIG. 2 before their assembly.
Après l'emboîtement des deux parties, celles-ci sont scellées l'une à l'autre par soudage aux ultrasons à hautes fréquences, ce qui donne naissance à un joint à labyrinthe exempt de colle et parfaitement étanche au liquide de perfusion.After the two parts have been fitted together, they are sealed to each other by high frequency ultrasonic welding, which gives rise to a glue-free labyrinth seal which is perfectly tight against the perfusion liquid.
Le débitmètre à flotteur 3, à savoir le tube de mesure conique 4 et le bouchon de fermeture 6, est réalisé en un polymère de butadiène-styrène de type K-Resin. Le flotteur 5 est constitué par une bille de verre.The float flow meter 3, namely the conical measurement tube 4 and the closure plug 6, is made of a butadiene-styrene polymer of the K-Resin type. The float 5 is constituted by a glass ball.
Une fois terminée, la ligne de perfusion conforme à l'invention est conditionnée sous un emballage stérile. Elle est à usage unique.Once completed, the infusion line according to the invention is packaged in sterile packaging. It is for single use only.
Le mode d'utilisation d'une ligne de perfusion perfectionnée suivant l'invention est le suivant. En premier lieu, on raccorde l'extrémité 1.1 du tuyau souple 1 à une source de liquide de perfusion sous pression, non représentée ici. Cette source de liquide de perfusion sous pression est de préférence une pochette souple mise sous pression au moyen d'un dispositif autonome de perfusion décrit par exemple dans la demande de brevet belge BE-A-2000/0600. On rappelle à cet égard que ce dispositif autonome de perfusion ne nécessite pas de potence de suspension. L'extrémité 1.2 du tuyau souple 1 est ensuite raccordée à l'élément de perfusion, également non représenté. Le débitmètre à flotteur 3 étant maintenu en position verticale, avec l'entrée vers le bas, on fait varier le débit de liquide de perfusion au moyen du clamp à molette 2, jusqu'à ce que la bille 5 atteigne dans le tube de mesure conique 4, la position correspondant au débit de liquide désiré. Le débit est ainsi réglé et le débitmètre à flotteur 3 peut désormais se trouver dans une position quelconque sans que le débit de liquide en soit affecté.The mode of use of an improved infusion line according to the invention is as follows. Firstly, the end 1.1 of the flexible pipe 1 is connected to a source of pressurized perfusion liquid, not shown here. This source of pressurized perfusion liquid is preferably a flexible pouch pressurized by means of an autonomous perfusion device described for example in Belgian patent application BE-A-2000/0600. In this regard, it should be recalled that this autonomous perfusion device does not require a suspension bracket. The end 1.2 of the flexible pipe 1 is then connected to the perfusion element, also not shown. With the float flow meter 3 kept in a vertical position, with the inlet down, the flow rate of the infusion liquid is varied by means of the thumbwheel clamp 2, until the ball 5 reaches into the measuring tube. conical 4, the position corresponding to the desired liquid flow rate. The flow is thus adjusted and the float flow meter 3 can now be in any position without affecting the liquid flow.
Il va de soi que l'invention n'est pas strictement limitée à l'exemple de réalisation qui vient d'être décrit et illustré. Un homme de métier pourrait imaginer diverses modifications, par exemple dans le mode d'assemblage du tube de mesure et du bouchon de fermeture, sans sortir du cadre des revendications qui suivent. It goes without saying that the invention is not strictly limited to the embodiment which has just been described and illustrated. A person skilled in the art could imagine various modifications, for example in the method of assembling the measuring tube and the closure cap, without going beyond the scope of the claims which follow.

Claims

REVENDICATIONS
1. Ligne de perfusion alimentée en liquide de perfusion sous pression, qui comprend un tuyau souple (1) à raccorder, par des moyens appropriés (1.1, 1.2), d'une part à une source de liquide de perfusion sous pression et d'autre part à un élément de perfusion, ledit tuyau souple (1) étant muni d'un organe (2) de variation du débit de liquide de perfusion, caractérisée en ce qu'elle comporte des moyens (3) de mesure du débit du liquide de perfusion, insérés dans ledit tuyau souple (1).1. Infusion line supplied with pressurized infusion liquid, which comprises a flexible hose (1) to be connected, by appropriate means (1.1, 1.2), on the one hand to a source of pressurized infusion liquid and on the other hand to an infusion element, said flexible hose (1) being provided with a member (2) for varying the flow rate of infusion liquid, characterized in that it comprises means (3) for measuring the flow rate of the liquid infusion lines, inserted into said flexible tube (1).
2. Ligne de perfusion suivant la revendication 1 , caractérisée en ce que lesdits moyens de mesure de débit (3) sont insérés dans ledit tuyau souple (1) avant l'organe (2) de variation du débit, par rapport au sens d'écoulement du liquide de perfusion.2. Infusion line according to claim 1, characterized in that said flow measurement means (3) are inserted in said flexible pipe (1) before the member (2) for variation of the flow rate, relative to the direction of flow of infusion fluid.
3. Ligne de perfusion suivant l'une ou l'autre des revendications 1 et 2, caractérisée en ce que lesdits moyens (3) de mesure du débit comprennent un débitmètre à flotteur (3), aussi appelé rotamètre.3. Infusion line according to either of claims 1 and 2, characterized in that said means (3) for measuring the flow rate comprise a float flow meter (3), also called a rotameter.
4. Débitmètre à flotteur pour une ligne de perfusion suivant la revendication 3, qui se compose essentiellement d'un tube de mesure conique (4) contenant un flotteur (5) et muni d'un bouchon de fermeture (6) à son extrémité de grand diamètre, caractérisé en ce que ledit tube de mesure conique (4) et ledit bouchon de fermeture (6) sont constitués d'une matière synthétique inerte par rapport au liquide de perfusion.4. Float flow meter for an infusion line according to claim 3, which essentially consists of a conical measuring tube (4) containing a float (5) and provided with a closure cap (6) at its end. large diameter, characterized in that said conical measuring tube (4) and said closure cap (6) consist of a synthetic material inert with respect to the infusion liquid.
5. Débitmètre à flotteur suivant la revendication 4, caractérisé en ce que ladite matière synthétique est un polymère de butadiène-styrène, de préférence de type K-Resin, ABS ou analogues.5. Float flow meter according to claim 4, characterized in that said synthetic material is a butadiene-styrene polymer, preferably of the K-Resin, ABS or similar type.
6. . Débitmètre à flotteur suivant l'une ou l'autre des revendications 4 et 5, dans lequel le tube de mesure conique (4) est muni, caractérisé en ce que le bouchon de fermeture (6) est constitué de la même matière synthétique que le tube de mesure (4), en ce que le tube de mesure (4) porte, à proximité de son extrémité de grand diamètre, une bride externe (7) pourvue, dans sa face d'extrémité, d'une portion annulaire en saillie (8) entourant le passage central du tube de mesure (4), ladite saillie (8) formant un épaulement annulaire extérieur (9) le long de la périphérie de la bride (7) et un épaulement annulaire intérieur (10) le long de la périphérie du passage central, en ce que le bouchon de fermeture (6) comprend un embout tubulaire (11) portant, à une extrémité, une bride externe (12) pourvue, dans sa face d'extrémité, d'une rainure annulaire (13) correspondant à ladite portion annulaire en saillie (8) du tube de mesure (4), en ce que le bouchon de fermeture (6) est posé sur le tube de mesure (4) de telle sorte que la rainure annulaire (13) du bouchon de fermeture (6) soit emboîtée sur la portion annulaire en saillie (8) du tube de mesure (4), et en ce que l'assemblage du bouchon de fermeture (6) avec le tube de mesure (4) est scellé par soudage aux ultrasons à hautes fréquences.6.. Float flow meter according to either of Claims 4 and 5, in which the conical measuring tube (4) is provided, characterized in that the closure plug (6) is made of the same synthetic material as the measuring tube (4), in that the measuring tube (4) carries, near its large diameter end, an external flange (7) provided, in its end face, with a projecting annular portion (8) surrounding the central passage of the measuring tube (4), said projection (8) forming an outer annular shoulder (9) along the periphery of the flange (7) and an inner annular shoulder (10) along the periphery of the central passage, in that the closure plug (6) comprises a tubular end piece (11) carrying, at one end, an external flange (12) provided, in its end face, with an annular groove ( 13) corresponding to said projecting annular portion (8) of the measurement tube (4), in that the closure cap ure (6) is placed on the measuring tube (4) so that the annular groove (13) of the closure plug (6) is fitted onto the projecting annular portion (8) of the measurement tube (4), and in that the assembly of the closure plug (6) with the measurement tube (4) is sealed by high frequency ultrasonic welding.
7. Débitmètre à flotteur suivant l'une quelconque des revendications 4 à 6, caractérisé en ce que le flotteur (5) est constitué par une bille en une matière inerte par rapport au liquide de perfusion et présentant un poids spécifique supérieur à celui du liquide de perfusion, en particulier en verre ou en acier inoxydable.7. Float flow meter according to any one of claims 4 to 6, characterized in that the float (5) consists of a ball made of a material inert with respect to the infusion liquid and having a specific weight greater than that of the liquid infusion sets, especially glass or stainless steel.
8. Ligne de perfusion suivant l'une quelconque des revendications 1 à 3, caractérisée en ce qu'elle est stérilisée et conditionnée sous un emballage stérile, en particulier à l'oxyde d'éthylène ou aux rayons gamma.8. Infusion line according to any one of claims 1 to 3, characterized in that it is sterilized and packaged in a sterile package, in particular with ethylene oxide or gamma rays.
9. Ligne de perfusion suivant l'une quelconque des revendications 1 à 3, comprenant un débitmètre à flotteur suivant l'une quelconque des revendications 4 à 7, caractérisée en ce qu'elle est stérilisée et conditionnée sous un emballage stérile, en particulier à l'oxyde d'éthylène ou aux rayons gamma.9. Infusion line according to any one of claims 1 to 3, comprising a float flow meter according to any one of claims 4 to 7, characterized in that it is sterilized and packaged in a sterile packaging, in particular at ethylene oxide or gamma rays.
10. Ligne de perfusion suivant l'une quelconque des revendications 1 à 3, 8 et 9, caractérisée en ce qu'elle est à usage unique. 10. Infusion line according to any one of claims 1 to 3, 8 and 9, characterized in that it is for single use.
PCT/BE2002/000175 2001-11-23 2002-11-21 Floater flowmeter intravenous line WO2003043682A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002364781A AU2002364781A1 (en) 2001-11-23 2002-11-21 Floater flowmeter intravenous line

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE2001/0765 2001-11-23
BE2001/0765A BE1014493A6 (en) 2001-11-23 2001-11-23 Improved infusion line float and flow meter for a line infusion.

Publications (2)

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WO2003043682A2 true WO2003043682A2 (en) 2003-05-30
WO2003043682A3 WO2003043682A3 (en) 2004-01-08

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AU (1) AU2002364781A1 (en)
BE (1) BE1014493A6 (en)
WO (1) WO2003043682A2 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3587313A (en) * 1969-01-30 1971-06-28 I V Ometer Inc Flow meter for parenteral solutions
US3803914A (en) * 1972-06-09 1974-04-16 Surgical Corp Flow meter for parenteral solutions
US4699617A (en) * 1985-10-31 1987-10-13 Terumo Corporation Flowmeter
EP0287247A2 (en) * 1987-04-09 1988-10-19 Parren-Donaldson Inc Selectable drop size infusion metering device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3587313A (en) * 1969-01-30 1971-06-28 I V Ometer Inc Flow meter for parenteral solutions
US3803914A (en) * 1972-06-09 1974-04-16 Surgical Corp Flow meter for parenteral solutions
US4699617A (en) * 1985-10-31 1987-10-13 Terumo Corporation Flowmeter
EP0287247A2 (en) * 1987-04-09 1988-10-19 Parren-Donaldson Inc Selectable drop size infusion metering device

Also Published As

Publication number Publication date
WO2003043682A3 (en) 2004-01-08
AU2002364781A8 (en) 2003-06-10
AU2002364781A1 (en) 2003-06-10
BE1014493A6 (en) 2003-11-04

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