(19)
(11)EP 3 554 622 B1

(12)EUROPEAN PATENT SPECIFICATION

(45)Mention of the grant of the patent:
28.09.2022 Bulletin 2022/39

(21)Application number: 17823226.0

(22)Date of filing:  14.12.2017
(51)International Patent Classification (IPC): 
A61M 39/04(2006.01)
A61M 39/10(2006.01)
A61M 39/26(2006.01)
(52)Cooperative Patent Classification (CPC):
A61M 39/045; A61M 39/10; A61M 39/26; A61M 2039/0063; A61M 2206/20
(86)International application number:
PCT/IB2017/057944
(87)International publication number:
WO 2018/109709 (21.06.2018 Gazette  2018/25)

(54)

Y-CONNECTOR FOR MEDICAL LINES

Y-ANSCHLUSS FÜR MEDIZINISCHE LEITUNGEN

RACCORD EN Y POUR TUYAUX MÉDICAUX


(84)Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA

(30)Priority: 15.12.2016 IT 201600127162

(43)Date of publication of application:
23.10.2019 Bulletin 2019/43

(73)Proprietor: Industrie Borla SpA
10024 Moncalieri (Torino) (IT)

(72)Inventor:
  • GUALA, Gianni
    10133 Torino (IT)

(74)Representative: Buzzi, Franco 
Buzzi, Notaro & Antonielli d'Oulx S.p.A. Corso Vittorio Emanuele ll, 6
10123 Torino
10123 Torino (IT)


(56)References cited: : 
DE-A1-102007 020 859
US-A1- 2008 086 097
US-A- 4 911 705
US-A1- 2016 089 529
  
      
    Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).


    Description

    Field of the invention



    [0001] The present invention refers to liquid flow components for medical lines, and more in particular it regards a Y-connector typically used for introducing a secondary flow into the flow of a primary liquid.

    State of the prior art



    [0002] Y-connectors thus made are for example disclosed by WO-2012/164514 on behalf of the same Applicant, wherein the Y-connector comprises a tubular body having a first inlet coaxial to the tubular body and an outlet, and a second inlet arranged obliquely to the tubular body and communicating therewith between the first inlet and the outlet. The first inlet of the Y-connector is usually sealingly closed by an elastic element, conveniently hollow, having a pre-slot for introducing a secondary liquid into the primary liquid coming from the second inlet.

    [0003] The first inlet can be conveniently be formed similar to a female luer lock connector, and in this case the elastic element is configured to serve as a valve: to this end, it has a hollow configuration (for example similar to the one described and illustrated in document US-5,533,708) and axially deformable, following the coupling of the first inlet with a complementary male luer connector, between an extended closing position in which the end thereof exposed towards the external can be easily cleaned and disinfected before coupling with the male connector, and a retracted opening position.

    [0004] In use, the axially extended inner cavity of the hollow elastic element can however entail a relatively large secondary liquid stagnation dead area, this being unwanted.

    [0005] Document DE 102007020859 discloses a Y-connector corresponding to the preamble of claim 1. Documents US 2008/086097, US 2016/089529 and US 4911705 describe similar connectors.

    Summary of the invention



    [0006] The object of the invention is to overcome the aforementioned technical drawback and this object is attained due to the fact that the first chamber has a radial size greater than that of the second chamber.

    [0007] Thanks to this solution idea the first inlet of the Y-connector according to the invention is thus efficiently protected by the elastic element free of any risk, in use, of liquid stagnation therein, in that the liquid coming from the second inlet generates continuous replacement thereof.

    [0008] The smaller radial size of the second chamber creates - in use - an advantageous effect on the dynamics of the liquid flow in the cavity of the elastic hollow element, in the area for introducing the liquid from the first inlet where greater stagnation could occur. As a matter of fact, the speed of the fluid current is greater in the second chamber with respect to that of the first chamber: thus, the pressure is lower in the second chamber with respect to that of the first chamber. This pressure difference between the two chambers translates into a vacuum in the cavity of the elastic element which, when the secondary liquid is introduced from the first inlet, facilitates the flow thereof basically suctioning it towards the second chamber, thus preventing the creation of areas for the stagnation of the secondary liquid in the cavity of the hollow element more efficiently.

    [0009] Furthermore, the arrangement of the radial septum can be such to obtain a swirling flow beneath the elastic element.

    Brief description of the drawings



    [0010] The invention will now be described in detail with reference to the attached drawings, provided purely by way of non-limiting example, wherein:
    • figure 1 is a lateral elevation schematic view of a Y-connector according to the invention,
    • figure 2 is a longitudinal sectional view according to line II-II of figure 1,
    • figure 3 is a longitudinal sectional view according to line III-III of figure 2, and
    • figure 4 is a cross-sectional view according to line IV-IV of figure 2.

    Detailed description of the invention



    [0011] With reference to the drawings, the Y-connector according to the invention comprises a tubular body 1 having a first inlet 2 and an outlet 3 coaxial to the tubular body 1, and a second inlet formed by a tubular appendage 4 arranged obliquely to the tubular body 1 and communicating therewith between the first inlet 2 and the outlet 3. The second inlet 4 is designated, in use, to be connected to a medical duct of a primary liquid.

    [0012] The first inlet 2 is formed similar to a female luer lock connector 5 designated to be coupled with a complementary male luer lock connector for introducing a secondary liquid, and containing a valve device formed by a hollow elastic element 6.

    [0013] It should be observed that the elastic element could also be made up of a simple generally flat cachet.

    [0014] The hollow elastic element 6, typically made of elastomeric material, has a distal end 7 normally arranged substantially flushed with respect to the free end of the female luer lock connector 5, and a proximal end 8 that forms a support base axially locked in the body 1. The distal end 7 is formed by a flat wall having a pre-slot 9, and it is easily cleanable and disinfectable ("swabbable").

    [0015] The cavity of the hollow elastic element 6, which axially extends between the distal end 7 and the proximal end 8, is indicated with 14.

    [0016] The condition represented in the drawings corresponds to the undeformed configuration of the hollow elastic element 6 wherein the first inlet 5 is sealingly closed. Should the male luer lock connector be used with the female luer lock connector 5, the hollow elastic element 6 is deformed and partly compressed ("luer activated") so as to open the pre-slot 9 and thus the communication between the first inlet 2 and the outlet 3.

    [0017] According to the invention, the cavity 14 is placed in communication with the second inlet 4 in manner such that, in use, the flow of the primary liquid flowing into the tubular body 1 from such second inlet 4 penetrates into the cavity 14 of the elastic hollow element 6 prior to reaching the outlet 3, thus obtaining an action for washing the inner surface of the wall 7, beneath the pre-slot 9, thus also preventing the stagnation of the secondary liquid in the cavity 14.

    [0018] To this end, the tubular body 1 is integrally obtained having an inner septum 10 for deviating the flow coming from the second inlet 4 towards the first inlet 2 and into the cavity 14 of the hollow elastic element 6. Such inner septum 10 extends axially and it is provided with a radial end portion 11 connected to the tubular body 1 in proximity of the base of the second inlet 4 to define a first chamber 12 open towards the hollow elastic element 6 and closed on the side of the outlet 3, and a second chamber 13 open towards the hollow elastic element 6 and towards the outlet 3.

    [0019] The inner septum 10 is conveniently offset with respect to the axis of the tubular body 1, so that the first chamber 12 is provided with a radial size greater than that of the second chamber 13. Preferably, and as observable in figure 4, the inner septum 10 is offset twofold, for example in two mutually orthogonal directions as represented in figure 4, in a manner such that the flow coming from the second inlet 4 and deviated towards the first inlet 2 is subjected to a swirling motion, for example generally helical, which improves the effect of washing the elastic element 6 further. The surface of the inner septum 10 facing towards the first chamber 12 can be slightly concave, as equally visible in figure 4.

    [0020] There may also be provided further deflectors, not illustrated in the drawings, configured in a manner such to accentuate the swirling motion of the liquid supplied from the second inlet 4 into the cavity 9 of the hollow elastic element 6.

    [0021] Obviously, the construction details and the embodiments may widely vary with respect to what has been described and illustrated, without departing from the scope of protection of the present invention as defined in the claims that follow. Thus, as previously mentioned, the invention is equally advantageously applicable in cases where the elastic element of the Y-connector is made up of a flat cachet like in the case of the aforementioned document WO-2012/164514, instead of a hollow element. The liquid deviated from the second inlet 4 towards the first inlet 2 shall perform an efficient action for washing the inner surface of the elastic element in this case too.


    Claims

    1. Y-connector for medical lines, comprising a tubular body (1) having a first inlet (2) coaxial with the tubular body (1) and containing a valve device formed by a hollow elastic element (6) sealingly closing said first inlet (2) in an openable manner, an outlet (3), and a second inlet (4) arranged obliquely to the tubular body (1) and communicating therewith between said first inlet (2) and the outlet (3), said tubular body (1) is formed with an inner septum (10) for deviating the flow coming from the second inlet (4) towards said elastic element (6) prior to directing it to the outlet (3), said inner septum (10) extending axially and being provided with a radial end portion (11) connected to the tubular body (1) in proximity of said second inlet (4) so as to define a first chamber (12) open towards the elastic element (6) and closed on the side of the outlet (3), and a second chamber (13) open towards the elastic element (6) and towards the outlet (3) characterised in that said inner septum (10) is offset relative to the axis of the tubular body (1) such that the first chamber (12) has a radial size greater than that of the second chamber (13).
     
    2. Y-connector according to claim 1, characterised in that said inner septum (10) is offset twofold with respect to the axis of the tubular body (1) in mutually orthogonal directions in such a manner that the flow coming from the second inlet (4) is deviated towards the first inlet (2) with a swirling motion.
     
    3. Y-connector according to claim 1 or 2, characterised in that said inner septum (10) is provided with a concave surface facing towards said first chamber (12).
     


    Ansprüche

    1. Y-Anschluss für medizinische Leitungen, umfassend einen rohrförmigen Körper (1) mit einem ersten Einlass (2), der koaxial zum rohrförmigen Körper (1) ist und eine durch ein hohles elastisches Element (6) ausgebildete Ventileinrichtung aufweist, die den ersten Einlass (2) abdichtend und öffenbar verschließt, einem Auslass (3) und einem zweiten Einlass (4), der schräg zum rohrförmigen Körper (1) angeordnet ist und mit diesem zwischen dem ersten Einlass (2) und dem Auslass (3) in Verbindung steht, wobei der rohrförmige Körper (1) mit einer inneren Scheidewand (10) ausgebildet ist, um den vom zweiten Einlass (4) kommenden Strom in Richtung des elastischen Elements (6) umzuleiten, bevor er zum Auslass (3) geleitet wird, wobei sich die innere Scheidewand (10) axial erstreckt und mit einem radialen Endabschnitt (11) bereitgestellt ist, der mit dem rohrförmigen Körper (1) in der Nähe des zweiten Einlasses (4) verbunden ist, um eine zum elastischen Element (6) hin offene und auf der Seite des Auslasses (3) geschlossene erste Kammer (12) und eine zum elastischen Element (6) und zum Auslass (3) hin offene zweite Kammer (13) zu definieren, dadurch gekennzeichnet, dass die innere Scheidewand (10) in Bezug auf die Achse des rohrförmigen Körpers (1) versetzt ist, so dass die erste Kammer (12) eine radiale Größe aufweist, die größer als die der zweiten Kammer (13) ist.
     
    2. Y-Anschluss nach Anspruch 1, dadurch gekennzeichnet, dass die innere Scheidewand (10) in Bezug auf die Achse des rohrförmigen Körpers (1) in zueinander orthogonalen Richtungen zweifach versetzt ist, so dass der vom zweiten Einlass (4) kommende Strom in einer Wirbelbewegung zum ersten Einlass (2) abgelenkt wird.
     
    3. Y-Anschluss nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die innere Scheidewand (10) mit einer der ersten Kammer (12) zugewandten konkaven Fläche bereitgestellt ist.
     


    Revendications

    1. Raccord Y pour tuyaux médicaux, comprenant un corps tubulaire (1) présentant une première entrée (2) coaxiale avec le corps tubulaire (1) et contenant un dispositif de valve formé par un élément élastique creux (6) fermant de manière étanche ladite première entrée (2) de manière ouvrable, une sortie (3), et une seconde entrée (4) disposée en oblique par rapport au corps tubulaire (1) et communiquant avec celui-ci entre ladite première entrée (2) et la sortie (3), ledit corps tubulaire (1) est formé avec une cloison interne (10) pour dévier l'écoulement venant de la seconde entrée (4) vers ledit élément élastique (6) avant de le diriger vers la sortie (3), ladite cloison interne (10) s'étendant axialement et étant munie d'une portion d'extrémité radiale (11) raccordée au corps tubulaire (1) à proximité de ladite seconde entrée (4) afin de définir une première chambre (12) ouverte vers l'élément élastique (6) et fermée sur le côté de la sortie (3), et une seconde chambre (13) ouverte vers l'élément élastique (6) et vers la sortie (3) caractérisé en ce que ladite cloison interne (10) est décalée par rapport à l'axe du corps tubulaire (1) de sorte que la première chambre (12) présente une dimension radiale supérieure à celle de la seconde chambre (13).
     
    2. Raccord Y selon la revendication 1, caractérisé en ce que ladite cloison interne (10) est doublement décalée par rapport à l'axe du corps tubulaire (1) dans des directions mutuellement orthogonales de telle manière que l'écoulement provenant de la seconde entrée (4) est dévié vers la première entrée (2) avec un déplacement de tourbillonnement.
     
    3. Raccord Y selon la revendication 1 ou 2, caractérisé en ce que ladite cloison interne (10) est munie d'une surface concave orientée vers ladite première chambre (12).
     




    Drawing

















    Cited references

    REFERENCES CITED IN THE DESCRIPTION



    This list of references cited by the applicant is for the reader's convenience only. It does not form part of the European patent document. Even though great care has been taken in compiling the references, errors or omissions cannot be excluded and the EPO disclaims all liability in this regard.

    Patent documents cited in the description