Fitting with gripping fins for a feeding line

Abstract

The present invention relates to a connector for an enteral nutrition line, comprising:a free end and a connecting end;a head coaxial with an axis and comprising the free end;a body coaxial with the axis and extending in the extension of the head, the body comprising the connecting end; andfixing means configured to cooperate with complementary fixing means of a complementary connector,the connector being characterized in that it further comprises at least one gripping fin extending radially relative to the axis from the head. Figure for abstract: Figure 1a

Description

Title of the invention: Connector having gripping fins for a feeding line FIELD OF THE INVENTION

[0001] The present invention relates to the field of connectors for making liquid transmission connections in the field of medical devices. The invention finds particular application in the field of enteral nutrition. STATE OF THE ART

[0002] Enteral nutrition lines, that is to say lines allowing food to be brought to the body directly at the level of the stomach or the intestines, generally comprise a container of nutrients connected to an enteral nutrition tube.

[0003] Nutrient containers having a male connector positioned at a container connection end and enteral feeding tubes having a female connector positioned at a tube connection end are known. The respective container and tube connectors may be attached directly to each other and locked in the secured position by threads.

[0004] Document WO 2005 / 055919 A1 in the name of the Applicant describes several examples of male connectors and female connectors specifically dedicated to enteral nutrition lines. The female connector has an inlet conduit into which a conical tip of the male connector can be inserted in a sealed manner. The male connector has a groove, which extends between the conical tip and an external shell. A head of the female connector, which delimits the inlet conduit, can be inserted into the groove. Each of the male and female connectors comprises fixing means in the form of complementary threads so as to lock the male and female connectors.

[0005] Furthermore, each of the connectors is sized and designed so that it cannot be accidentally connected to an infusion line connector, or to a catheter connector. The connectors presented in the aforementioned document therefore limit the risks of feeding an enteral feeding tube with a product inappropriate for enteral feeding, or worse, of feeding a catheter with a product for enteral feeding.

[0006] However, the Applicant has noticed that, for newborns in particular, the connectors are very small and therefore tend to slip in the hands of operators, making it difficult to connect them to the feeding lines. These difficulties concern both male and female connectors. However, the sizing of the connectors must comply with very specific standards which have the following characteristics: effect of limiting possible modifications to the connections.

[0007] Furthermore, in the field of enteral nutrition, it is necessary to take into account the fragility and sensitivity of the skin of newborns, which easily tends to be irritated by the movements of the nutrition lines and in particular of their connections, which further limits the modifications that can be made to such connections. GENERAL DESCRIPTION OF THE INVENTION

[0008] In view of the above, one aim of the invention is to remedy the drawbacks of the state of the art.

[0009] More specifically, an object of the invention is to provide a connector, in particular a connector for an enteral nutrition line, which is easier to handle, regardless of the size of the connector. A connector is sought which allows enteral nutrition lines to be assembled and disassembled quickly and safely.

[0010] An additional objective is to facilitate the handling of the fitting by an automatic assembly machine, in particular the transport of the fitting and its attachment to a tube. The desired fitting is preferably easily graspable by a clamp of such a machine.

[0011] Another object of the invention is to provide a connector, in particular a connector for an enteral nutrition line, which does not slip when it is attached to a complementary connector, while complying with the dimensional requirements described in document WO 2005 / 055919 A1.

[0012] The mechanical design of the connector should preferably remain simple. The desired connector should not pose a risk of injuring patients, particularly newborns whose skin and mucous membranes are fragile and sensitive.

[0013] To meet these needs, the invention relates to a connector for an enteral nutrition line, the connector comprising: a free end and a connecting end; a head coaxial with an axis and comprising the free end; a body coaxial with the axis and extending in the extension of the head, the body comprising the connecting end; and fastening means configured to cooperate with complementary fastening means of a complementary connection, the fitting further comprising at least one gripping fin extending radially relative to the axis from the head.

[0014] The connector according to the invention has at least one gripping fin - preferably several fins - extending radially from the head of the connector. Thus, gripping and handling of the connector are facilitated, whether or not the connector is engaged with a complementary connector.

[0015] It will be noted that the connector according to the invention can be a male connector or a female connector. In both cases, the connector is easy to assemble and disassemble to a complementary connector. No specific tools are required to fix the connectors. The connectors are not likely to slip during their assembly and disassembly.

[0016] A connection as defined above may have, in an optional and non-limiting manner, the following characteristics taken alone or in any of the technically possible combinations:

[0017] - the head has a maximum diameter, the at least one gripping fin having a maximum radial dimension, the maximum radial dimension being at most equal to 10% of the maximum diameter of the head.

[0018] - the at least one gripping fin extends axially from the head in the direction from the proximal end.

[0019] - the head comprises a conical tip and a collar coaxial with the tip and extending at least partially around the tip, one of the tip and the collar comprising the fixing means.

[0020] - the at least one gripping fin extends from an outer surface of the collar towards the connecting end.

[0021] - the external surface of the collar is convex.

[0022] - the external surface of the collar is ovoid.

[0023] - the connector further comprises, at the connection end, a rim in projection extending radially outwardly and configured to axially lock a fixing ring, the at least one gripping fin extending away from said projecting edge.

[0024] - the at least one gripping fin extends along the axis over an axial length between 30% and 80% of a total axial length of the fitting, preferably between 40% and 70% of the total axial length of the fitting.

[0025] - the at least one gripping fin comprises an axial edge and a free edge, the axial edge and the free edge being connected by a rounded junction, a radius of curvature of the proximal edge preferably being greater than or equal to 0.5 millimeters and less than or equal to 2.0 millimeters.

[0026] - the fitting comprises between two and four gripping fins.

[0027] According to a second aspect, the invention relates to a connection assembly comprising a male connector and a female connector, the male connector being configured to enter at least partially into the female connector, at least one of the male connector and the female connector being as defined above. GENERAL DESCRIPTION OF THE FIGURES

[0028] Other characteristics, aims and advantages of the invention will emerge from the following description, which is purely illustrative and not limiting, and which must be read in conjunction with the attached drawings, among which:

[0029] [fig.la] [fig.la] is a perspective view of a male connector of an enteral nutrition line according to an exemplary embodiment.

[0030] [fig.lb] [fig.lb] is a longitudinal sectional view of the male connector of [fig.la], the sectional plane passing through gripping fins of the male connector.

[0031] [fig.2a] [fig.2a] is a perspective view of a female connector of an enteral nutrition line according to an exemplary embodiment.

[0032] [fig.2b] [fig.2b] is a longitudinal sectional view of the female connector of [fig.2a], the sectional plane passing through gripping fins of the female connector.

[0033] [fig.3] [fig.3] is a longitudinal sectional view of a connection assembly including the male connector of [fig.lb] and the female connector of [fig.2b] being connected. DETAILED DESCRIPTION OF AN EMBODIMENT

[0034] The detailed description below concerns the example of an enteral nutrition line. This may be a nutrition line comprising a nasogastric tube, an orogastric tube, etc. It will be understood, however, that the invention may be integrated, with the same advantages, into any other type of nutrition or perfusion line, or into any other liquid transmission connection in the medical field.

[0035] Throughout the remainder of this description, “free” will designate a part or an end (for example a tip) which is located on the side of the connection of the connector to a complementary connector, while “connection” will designate a part or an end which is located on the side of the attachment of the connector to the nutrition line (a bag, a reservoir, etc.). Typically, in the present application, the free end of the male connector corresponds to its distal end and the connection end corresponds to its proximal end.

[0036] Furthermore, the axis A of a connection is the axis A around which the elements of the connection 10 (end piece, collar, etc.) are arranged, which corresponds substantially to an axis of symmetry of the connection 10. An axial direction corresponds to the direction of the axis A, a radial direction is a direction perpendicular to this axis A and passing through it. Furthermore, a circumferential direction corresponds to a direction perpendicular to the axis A and not passing through it. Unless otherwise specified, internal (or interior) and external (or exterior), respectively, are used with reference to a radial direction so that the internal (or interior) part or face of an element is closer to the axis A than the external (or exterior) part or face of the same element.

[0037] Throughout the attached figures and throughout the description below, similar elements bear identical alphanumeric references.

[0038] Enteral nutrition line

[0039] An enteral nutrition line, for example for a hospital environment, comprises at least one connection assembly comprising a first connector 10 configured to be connected to a second connector 11.

[0040] The first connector 10 comprises an end piece 4, preferably of conical shape, configured to engage in an inlet conduit 160 of the second connector 11. In the following, the first connector will be designated by male connector 10 and the second connector by female connector 11, the end piece 4 of the male connector 10 being configured to enter at least partially into the inlet conduit 160 of the female connector 11.

[0041] For example, the male connector 10 may be arranged at a connecting end of a nutrient container. The nutrient container comprises, for example, a bag, a flask, a bottle, a syringe or an enteral nutrition feeder. The nutrient intended to circulate in the enteral nutrition line comprises, for example, milk, intended for a premature newborn.

[0042] The female connector 11 can, for its part, be arranged on a connection end of an enteral nutrition tube. The nutrition tube provides the nutrient to the patient. This is, for example, a nasogastric tube, or an orogastric tube.

[0043] It will be understood that the enteral nutrition line may also include one or more bags, reservoirs, syringes or other liquid delivery or liquid withdrawal instruments, extensions, etc. Several male connector / female connector combinations may be provided for mounting the enteral nutrition line.

[0044] The male connector 10 and the female connector 11 are for example made of polymer material, preferably by molding.

[0045] Male connector 10

[0046] [Fig.1a] and [Fig.1b] illustrate a male connector 10 for an enteral nutrition line according to an exemplary embodiment, respectively in a perspective view and in a longitudinal sectional view along the axis A of the male connector 10.

[0047] The male connector 10 comprises a head 2 comprising the free end E1 of the male connector 10 and a body 9 comprising its connection end E2. The head 2 and the body 9 are coaxial with the axis A. The body 9 extends along the axis A in the extension of the head 2, up to the connection end E2 of the male connector 10.

[0048] The head 2 comprises in particular the conical end piece 4 which extends along the axis A, as well as a collar 5 secured to the end piece 4. The collar 5 is coaxial with the end piece 4, and extends at least partially around the end piece 4. The end piece 4 extends from the body 9 of the male connector 10, in the direction of the connection end E2.

[0049] The end piece 4 is in the shape of a truncated cone; a large base of the truncated cone of the end piece 4 is located towards the connection end E2, and a small base of the truncated cone of the cone of the tip 4 is located towards the free end El. Where appropriate, the tip 4 has a conicity of between 5% and 9%, for example of the order of 6% or 8%.

[0050] In addition, the tip 4 here advantageously defines a male conduit 40 along the axis A. The male conduit 40 opens out on the side of the connection end E2 as well as on the side of the free end El, that is to say that it allows fluid communication between the connection end E2 and the free end El of the male connector 10. When the male connector 10 is connected to the complementary female connector 11, the male conduit 40 thus allows the passage of liquid, for example milk intended for the patient.

[0051] Preferably, the free end of the conical end piece 4 extends at a distance from the free end of the collar, so that the conical end piece 4 projects along the axis A relative to the annular edge of the collar 5 at the free end El of the connector, as can be seen in [fig.lb]. The collar 5 extends around the end piece 4, radially outwardly and at a distance from the end piece 4. The end piece 4 and the collar 5 thus define between them an annular space 7. The annular space 7 is open at the free end El of the male connector 10 and is configured to receive a head of a complementary female connector 11.

[0052] In particular, the collar 5 has an internal surface 50 facing the end piece 4 and an external surface 52. The annular space 7 is delimited by the internal surface 50 and the end piece 4.

[0053] In one embodiment, the external surface 52 of the collar 5 is smooth, that is to say without roughness or protuberances, in order to facilitate its cleaning and to limit the risks of asepsis.

[0054] In the present example, the external surface 52 is convex, preferably ovoid in shape. It has been found that this external shape is optimal for not risking injury to a patient in the event of contact, while remaining simple to manufacture. This is particularly relevant if the male connector 10 is used in an enteral nutrition line intended for newborns, in particular premature newborns, whose skin is very sensitive.

[0055] Advantageously, to facilitate the handling of the male connector 10, the male connector 10 has one or more gripping fins 6.

[0056] The fins 6 extend radially outward from the head 2 of the male connector 10.

[0057] In the present example, the fins 6 extend from the external surface 52 of the collar 5 on the side and extend axially to the body 9.

[0058] In one embodiment, the number of fins 6 of the male connector 10 is between two and four in order to facilitate cleaning of the male connector 10 and to limit the risks of asepsis, while guaranteeing good grip by an operator. the embodiment illustrated in the figures, the male connector 10 comprises four fins.

[0059] The fins are preferably distributed regularly and circumferentially around the axis A. When the number of fins 6 is even, the fins 6 are opposite each other two by two. Preferably, all the gripping fins 6 are of identical shape.

[0060] Thanks to the gripping fins 6 provided on the head 2 of the male connector 10, the male connector 10 is easier to grip and handle, whether or not it is engaged with a complementary female connector 11. In particular, the fins 6 facilitate the handling of the male connector 10 by an automatic assembly machine. The male connector 10 is easily graspable by a gripper of the automatic assembly machine.

[0061] The center of gravity of the male connector 10 is further stabilized due to the presence of the gripping fins 6. The selection of the male connector 10, by a distributor of the assembly machine, is facilitated.

[0062] Another advantage of the gripping fins 6 is to facilitate the verification of the rotation of the connection, during assemblies by an automatic assembly machine. The verification can be carried out with proximity sensors.

[0063] In the present example, each fin 6 comprises two opposite and substantially parallel lateral surfaces extending radially from the external surface 52 of the collar 5. The two lateral surfaces are connected at their external radial end by an axial edge 61 and at their end on the connection side by a radial edge 60. The thickness (circumferential dimension, between the lateral surfaces) of the fins is reduced, for example by the order of 1 millimeter.

[0064] The external surface 52 of the head 2, which here has an ovoid shape, comprises a zone Z of maximum diameter. This zone Z is here located close to the free annular edge of the collar 5. In one embodiment, each fin 6 extends axially from this zone Z and maintains a constant distance from the axis A until it approaches the axis A at a radial edge 60 to join the body 9. In other words, the axial edge 61 of the fins 6 extends at a substantially constant distance from the axis A up to its radial edge 60.

[0065] In one embodiment, the junction between the axial edge 61 and the radial edge 60 is rounded. A radius of curvature of this junction is for example between 0.5 millimeters and 2.0 millimeters (terminals included). In this way, the fin does not have a sharp angle, thus avoiding any risk of injuring the skin or mucous membranes of patients in contact with the male connector 10.

[0066] The fin 6 and in particular the rounded junction between its edges is produced directly during the molding of the male connector 10.

[0067] In order to further limit the risk of patient injury, the radial extension of the fins 6 is limited. More precisely, by denoting DA the maximum radial dimension between the axial edges of two opposite fins along an axis radial to the axis A, the radial dimension DA is at most equal, to within 0.1 millimeter, to the maximum diameter D3 of the head 2. In other words, the fins 6 protrude by a maximum of 0.1 millimeters compared to the rest of the head 2, to avoid scratching the skin or mucous membranes of patients in the event of contact. In the orientation of [fig.lb], the radial dimension DA extends in a vertical direction.

[0068] In one embodiment, the radial dimension DA and the maximum diameter D3 are equal. In this way, the risks of injury to patients are limited while ensuring good gripping of the fins 6 by an operator.

[0069] The axial length LA of each gripping fin 6, between its anchoring zone on the external surface 52 and its radial edge 60, is preferably between 30% and 80% of the total axial length LR of the connection, preferably between 40% and 70%. It is recalled that the total axial length LR is taken along the axis A, between the connection end E2 and the free end EL. The gripping fins 6 thus protrude radially from the head 2, and have lateral surfaces of sufficient area to allow good gripping by a person or by an automatic assembly machine.

[0070] The annular space 7 comprises a first portion 70 located on the side of the free end E1 as well as a second portion 8 extending in the direction of the connection end E2 in the extension of the first portion 70 along the axis A and adjacent to a base of the collar 5.

[0071] The fixing means 3 are arranged at the level of the annular space 7 defined between the end piece 4 and the collar 5. The fixing means 3 are configured to connect the connector 10 to a complementary female connector 11.

[0072] In one embodiment, the fixing means 3 comprise threads, extending radially towards the annular space 7. The threads 3 of the male connector 10 are configured to cooperate with complementary threads of the female connector 11 in order to allow fixing by insertion and locking of the male connector 10 in the female connector 11. The threads of the male connector 10 may for example comprise a double thread, each thread extending over a single turn.

[0073] Alternatively or in combination, the fixing means 3 may comprise a bayonet locking means. Here, the locking means may be female and comprise one or more angled grooves formed in the internal surface 50 of the collar 5 adapted to cooperate with as many male lugs of the female connector 11.

[0074] In the example of Figures 1a and 1b, the threads extend radially inwards in the first portion 70 of the annular space 7 from the internal surface 50 of the collar 5. The threads thus face the external surface of the end piece 4.

[0075] The inner surface 50 of the collar 5 and the outer face of the end piece 4 which delimit the second portion 8 of the annular space 7 are preferably devoid of fixing means. In the example illustrated in the figures, the second portion 8 has a longitudinal annular recess shape extending along the axis A around the end piece 4. In a non-limiting manner, the inner surface 50 of the collar 5 and the outer face of the end piece 4 at the level of the second portion 8 may be generally conical, with a conicity less than the conicity along the first portion 70 of the annular space 7.

[0076] The length of the first portion 70 along the axis A, between the annular edge (located at its free end) of the collar 5 and the interface I with the second portion 8, is configured to accommodate the head of a complementary female connector 11. In one embodiment, when connecting a complementary female connector 11, no part of the female connector 11 is housed in the second part 8. In the case of a connector 10 comprising threads 3, the interface I is located at the bottom of the threads, that is to say at the connection end of the threads 3.

[0077] The second portion 8 extends along the axis A, and has an axial length E between the connection-side end of the first portion 70 located at the interface I with the second portion 8 and the connection-side end of the second portion 8 (corresponding to the bottom of the recess) of between 1.8 millimeters and 4.0 millimeters, preferably between 2.0 millimeters and 3.7 millimeters. Furthermore, DI denotes the outside diameter of the end piece 4, measured at the interface I between the first portion 70 and the second portion 8. The ratio between the outside diameter DI of the end piece 4 and the axial length E of the second portion 8 is greater than or equal to 1.0 and less than or equal to 2.0. In one embodiment, the DI to E ratio is greater than or equal to 1.1 and less than or equal to 1.8, preferably greater than or equal to 1.2 and less than or equal to 1.3.

[0078] The external diameter DI of the end piece 4 is for example between 3.5 millimeters and 4.0 millimeters (terminals included).

[0079] The configuration of the second portion 8, for example in the form of a longitudinal recess, the length E of which is at least equal to half the external diameter D1, has several advantages.

[0080] The dimensioning of this second portion 8 makes it possible in particular to absorb the stresses over a larger surface area and to avoid shrinkage during the manufacture of the male connector 10. It also makes it possible to increase the thickness LE of the end piece 4 (radial dimension of the end piece 4 between its internal surface and its external surface at the bottom of the annular space 7, at the interface with the connection radius with the collar 7 - see [fig.lb]) along the second portion 8, with a constant internal diameter of the end piece 4.

[0081] Thus, the risks of breakage of the end piece 4 during the assembly or disassembly of the male connector 10 with a complementary female connector 11 are reduced, as opposed to the male connectors of the state of the art whose chemical resistance under stress was more reduced over time and were likely to break at the base of the end piece.

[0082] This is particularly advantageous because the male connector 10 further comprises one or more gripping fins 6, which can encourage a user to exert a greater screwing force during assembly with the female connector 11; due to the presence of the second portion 8, the risks of breakage of the end piece 4 during assembly are reduced, even if the screwing is vigorous.

[0083] DC is the diameter of the internal surface of the tip 4, measured at the free end of the tip 4 (see [fig.lb]). In one embodiment, the ratio between the internal diameter DC of the tip 4 and the thickness LE is between 1.0 and 3.3 (limits included), preferably between 2.0 and 3.0.

[0084] For example, the thickness LE of the tip 4 measured at the base of the cone of the second portion 8 may be between 0.7 millimeters and 1.2 millimeters (inclusive), preferably between 0.75 millimeters and 0.90 millimeters (inclusive), for an internal diameter of the tip 4 between 1.2 millimeters and 2.3 millimeters (inclusive), preferably between 2.1 millimeters and 2.2 millimeters (inclusive). Typically, the thickness LE of the tip 4 may be equal to 0.86 millimeters for an internal diameter DC equal to 2.2 millimeters.

[0085] Furthermore, the dimensioning of the second portion 8 of the annular space, between the end piece 4 and the collar 5, creates a radial clearance during the assembly of the male connector 10 with a complementary female connector 11. The collar 5 but also the end piece 4 thus have more radial flexibility than the collars and end pieces of the connectors of the prior art, which facilitates the assembly of the connectors 10, 11 and limits the radial stresses undergone by the connector during its use.

[0086] Finally, such dimensioning of the second portion 8 of the annular space 7 makes it possible to limit material defects during the manufacture of the male connector 10, and in particular to avoid shrinkage during the cooling of the material constituting the connector.

[0087] This dimensioning of the end piece 4 and of the annular space 7 thus makes it possible to significantly improve the strength of the male connector 10, in particular its strength under stress, and to improve the radial clearance during assembly with the complementary female connector 11. The head 2 and / or the body 9 of the male connector 10 can furthermore be lengthened along the axis A compared to the male connectors of the prior art, without excessively increasing the mass of the connector 10.

[0088] Here, the total axial length LR of the male connector 10 between the connecting end connection E2 and the free end E1 is preferably between 10 millimeters and 20 millimeters (terminals included), for example of the order of 15 millimeters. The total axial length LR of the connection is preferably between three times and six times greater than the axial length E of the second portion 8 along the axis A.

[0089] Finally, the maximum external diameter D3 of the male connector 10 is preferably between 5 millimeters and 7 millimeters (terminals included). This maximum diameter D3 is reached here at the head 2 of the male connector 10.

[0090] Finally, with regard to the body 9 of the male connector 10 located at the connection end E2, this body 9 may have a generally cylindrical shape. The diameter of this cylinder is less than the maximum diameter D3 of the collar 5. Where appropriate, the external surface of the body 9 is cylindrical of revolution.

[0091] The body 9 forms the fixing part of the male connector 10 with a nutrient container, tubing, extension, etc.

[0092] The body 9 preferably comprises, at the connection end E2, a projecting edge 90. The edge 90 projects relative to the lateral surface of the body 9.

[0093] The edge 90 is configured to axially lock a fixing ring. In particular, the edge 90 can be used to engage one end of a tab cap. The tab cap can have, at the other end, a sealing tip for closing the feeding line.

[0094] Here, the edge 90 comprises a flat radial surface opposite the collar 5 and is chamfered on the connection side in order to facilitate the engagement of the fixing ring. Following its assembly, the fixing ring abuts against the flat radial face of the edge 90.

[0095] Preferably, the border 90 is annular and continuous around the entire circumference of the body 9. Alternatively, the border 90 is discontinuous and comprises one or more angular sectors extending circumferentially around the body 9.

[0096] In one embodiment, the fins 6 extend at a distance from the edge 90, so as to allow the attachment of a fixing ring.

[0097] Female connector 11

[0098] [Fig.2a] and [Fig.2b] illustrate a female connector 11 of an enteral nutrition line according to an exemplary embodiment, respectively in a perspective view and in a longitudinal sectional view along an extension axis of the female connector 11. The female connector 11 being configured to receive the male connector 10, the extension axis of the female connector 11 coincides with the axis A.

[0099] In the present example, the female connector 11 is further configured to be partially housed in the male connector 10. More specifically, the first head portion 16 of the female connector 11 is configured to be partially housed in the space annular 7 defined by the end piece 4 and the collar 5 of the male connector 10 during their connection.

[0100] Like the male connector 10 described above, the female connector 11 comprises a head comprising the free end E1 of the female connector 11 and a body 19 comprising its connection end E2. The head and the body 19 are coaxial with the axis A and both extend along the axis A.

[0101] The head of the female connector 11 comprises an end piece 16, positioned at the free end El, and a collar 17, located in the extension of the end piece 16 in the direction of the free end El of the female connector IL. The end piece 16 has an outside diameter smaller than the outside diameter D'3 of the collar 17.

[0102] It will be noted that all of the characteristics described for the male connector 10 apply mutatis mutandis to the female connector 11. In particular, the female connector 11 may comprise one or more gripping fins 6.

[0103] Each fin 6 extends radially from the head of the female connector 11, from the collar 17 to the body 19.

[0104] In a similar manner to the fins 6 of the male connector, the radial extension of the fins 6 is limited so that the connector remains atraumatic for the patients. Thus, the maximum radial dimension DA between two opposite fins 6 is at most equal (to within 1 millimeter) to the maximum diameter D'3 of the outer surface 170 (corresponding here to the diameter of the collar 17 at the level of the flat side). In other words, the fins 6 protrude by a maximum of 0.1 millimeters relative to the rest of the head, to avoid scratching the skin or mucous membranes of the patients in the event of contact.

[0105] In one embodiment, the maximum diameter D'3 is between 4.5 millimeters and 6.5 millimeters (inclusive).

[0106] In the present example, the radial dimension DA of the fins 6 is less than the maximum diameter of the collar 17, so that the axial edges of the fins 6 are radially set back relative to the outer surface 170 of the collar 17.

[0107] Preferably, all the gripping fins 6 are of identical shape. Here, each fin 6 has a shape similar to the shape of the fins of the male connector, with two opposite lateral surfaces extending radially from the head, connected together by an axial edge 61 and a radial edge 60 connected by a rounded junction.

[0108] The fins 6 are positioned axially at a distance from the fixing means 13. In the example of the female connector 11 of Figures 2a and 2b, the flat side of the collar 17 separates the fixing means 13 and the fins 6.

[0109] Thanks to the gripping fins 6, the female connector 11 is easier to grasp and handle by a person or by an automatic assembly machine, whether or not the connector is engaged with a complementary connector.

[0110] The optional features presented above, with reference to the male connector 10 of Figures 1a and 1b, are also valid for the gripping fins of the female connector 11. [YES] In particular:

[0112] - the number of gripping fins is between two and four; - the fins are distributed regularly and circumferentially around the axis A; - the axial length LA of each gripping fin, from its anchoring zone on the outer surface 170 of the collar 17 to its radial edge 60, is between 30% and 80% of the total axial length L'R of the female connector 11 between the connection end E2 and the free end El, preferably between 40% and 70%.

[0113] The total length L'R of the female connector 11 is for example between 10 millimeters and 20 millimeters (terminals included), for example 15 millimeters.

[0114] The radius of curvature R of the junction between the axial edge 61 and the radial edge 60 of each gripping fin 6 is preferably between 0.5 millimeters and 2.0 millimeters (terminals included), always to ensure that the connection remains atraumatic for the skin and mucous membranes of the patient.

[0115] Furthermore, the end piece 16 of the head of the female connector 11 comprises fixing means 13 complementary to the fixing means 3 of the male connector 10.

[0116] In the present example, the fastening means 13 comprise threads extending radially from the external surface of the end piece 16 and configured to cooperate with the threads of the fastening means 3 of the male connector 10. Alternatively or in combination, the fastening means 13 of the female connector 11 may comprise a bayonet locking means, or any other sealed and fixed fastening means. For example, the locking means may be male and comprise one or more male lugs extending from the external surface of the end piece 16 and adapted to cooperate with as many female angled grooves of the male connector 10.

[0117] In the present example, the end piece 16 has a double thread, each thread extending over one turn, as can be seen in [fig.2b].

[0118] Very advantageously, the outside diameter of the tip 16 of the head is strictly less than the inside diameter of the internal surface 50 of the collar 5 of the male connector 10 at the interface I.

[0119] The end piece 16 defines the inlet conduit 160 of the female connector 11. The inlet conduit 160 has a shape complementary to that of the end piece 4 of the male connector 10.

[0120] In the present example, the end piece 16 thus has a truncated cone shape, configured to receive the end piece 4 of the male connector 10. Where appropriate, the end piece 16 has a conicity equal to the conicity of the male end piece 4, typically comprised between 5% and 9%, for example around 6% or 8%.

[0121] The end piece 16 is configured to receive the part of the end piece 4 which extends inside the first portion 70 of the annular space 7. An internal diameter D' 1 of the end piece 16 is thus greater than the external diameter DI of the end piece 4. Furthermore, when the end piece 4 of the male connector 10 is inserted into the inlet conduit 160, the end piece 16 is itself housed in the annular space 7 defined by the end piece 4 and the collar 5.

[0122] The complementarity of shape between the end piece 16 of the female connector 11 and the head 2 of the male connector 10 is illustrated in [fig.3]. This figure represents, in longitudinal sectional view, the connection assembly formed by the male connector 10 and the female connector 11 during connection. By "during connection" is meant that the fixing means 3 of the male connector 10 are at least partially engaged with the fixing means 13 of the female connector 11, so that the two connectors 10, 11 are connected to each other.

[0123] As can be seen in [fig.3], the end piece 16 is shaped to extend into the second portion 70 of the annular space 7, without however reaching the second portion 8 in the form of a longitudinal recess.

[0124] Returning to Figures 2a and 2b, the collar 17 here has, on the free side (on the left according to the orientation of [fig.2b]), a flat side which extends radially outwards from the end piece 16.

[0125] D'3 is the maximum external diameter of the flat side of the collar 17. The diameter D'3 is greater than the external diameter D'2 of the end piece 16.

[0126] On the free side, the collar 17 comprises an outer surface 170. The outer surface 170 of the collar 17 here has an ovoid shape. In one embodiment, the outer surface 170 is configured to extend in the extension of the outer surface 52 of the collar 5 when the male connector 10 and the female connector 11 are connected, which reduces the protruding surfaces and therefore limits the risks of injury to the patient. Where appropriate, when the connectors 10, 11 are connected, the flat side of the collar 17 of the female connector abuts against the annular edge of the collar 5 of the male connector 10.

[0127] Finally, with regard to the body 19 located on the free side of the female connector 11, this is preferably cylindrical in shape and has an external diameter less than the external diameter D'3 of the external surface 170 of the head.

[0128] The body 19 defines an extension conduit 15. This extension conduit 15, which is not necessarily intended to cooperate with a part of the male connector 10, is located in the extension of the end piece 16 along the axis A. Thus, liquid can circulate inside the female connector 11 between the free end El and the connection end E2. The extension conduit can be cylindrical.

[0129] Where appropriate, a radial narrowing occurs at the interface between the inlet duct 160 and the extension duct 15.

[0130] In the illustrated embodiment, the periphery of the body 19 of the female connector 11 is not provided here with an edge projecting relative to the lateral surface of the body, provided for the axial locking of a fixing ring. This is not, however, limiting, such a projecting edge being able to be added if necessary, to cooperate for example with a tab cap.

[0131] The connection assembly formed by the male connector 10 and the female connector 11 described above combines great ease of use, thanks to the gripping fins 6 making assembly and disassembly easier, and great reliability since the risk of mechanical breakage at the conical end of the male connector is significantly limited during assembly and disassembly.

[0132] Furthermore, the connectors 10, 11 can be manufactured in large numbers while ensuring control of the manufacturing quality; the gripping fins 6 facilitate the transport of the connectors 10, 11 by an automatic assembly machine, and the shape described above for the annular space of the male connector 10 makes it possible to avoid retas at the head of the male connector 10.

[0133] The enteral nutrition line connectors described above are therefore more suitable for mass use in a hospital environment than the connectors of the state of the art.

Claims

Claims

1. Connector (10, 11) for an enteral nutrition line, comprising: a free end (El) and a connection end (E2); a head (2, 16, 17) coaxial with an axis (A) and comprising the free end (El); a body (9, 19) coaxial with the axis (A) and extending in the extension of the head (2), the body comprising the connection end (E2); and fixing means (3, 13) configured to cooperate with complementary fixing means (13, 3) of a complementary connector (11, 10), the connector (10, 11) further comprising at least one gripping fin (6) extending radially relative to the axis (A) from the head (2, 16, 17), the gripping fin (6) extending along the axis (A) over an axial length (LA) of between 30% and 80% of a total axial length (LR) of the connector (10).

2. A fitting (10, 11) according to claim 1, wherein the head (2, 16, 17) has a maximum diameter (D3), the at least one gripping fin (6) having a maximum radial dimension (DA), the maximum radial dimension (DA) being at most equal, to 10%, to the maximum diameter (D3) of the head (2, 16).

3. A connector (10, 11) according to any one of claims 1 or 2, wherein the at least one gripping fin (6) extends axially from the head (2, 16) towards the proximal end (EP).

4. A connector (10, 11) according to claim 3, wherein the head (2, 16, 17) comprises a conical end piece (4, 16) and a collar (5, 17) coaxial with the end piece (4, 16) and extending at least partially around the end piece (4, 16), one of the end piece (4, 16) and the collar (5, 17) comprising the fixing means (3, 13), the at least one gripping fin (6) extending from an external surface (52, 170) of the collar (5, 17) towards the connection end (E2).

5. A fitting (10, 11) according to claim 4, wherein the outer surface (52, 170) of the collar (5, 17) is convex, preferably ovoid.

6. A connector (10, 11) according to any one of claims 4 or 5, further comprising, at the connecting end (E2), a projecting edge (90) extending radially outwards and configured to axially lock a fixing ring, the at least one gripping fin (6) extending at a distance from said projecting edge (90).

7. Fitting (10, 11) according to one of claims 1 to 6, in which the axial length (LA) of the gripping fin (6) is between 40% and 70% of the total axial length (LR) of the fitting (10).

8. A connector (10, 11) according to any one of claims 1 to 7, wherein the at least one gripping fin (6) comprises an axial edge (61) and a free edge (60), the axial edge (61) and the free edge (60) being connected by a rounded junction, a radius (R) of curvature of the proximal edge (60) preferably being greater than or equal to 0.5 millimeters and less than or equal to 2.0 millimeters.

9. A fitting (10, 11) according to any one of claims 1 to 8, comprising between two and four gripping fins (6).

10. A connection assembly comprising a male connector (10) and a female connector (11), the male connector (10) being configured to at least partially engage the female connector (11), at least one of the male connector (10) and the female connector (11) being in accordance with any one of claims 1 to 9.

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